PALEOCLIMATE > ICE CORE RECORDS > ISOTOPES > ARGON 40/36 IN AIR TRAPPED IN GLACIAL ICE � Parameter Definition � PALEOCLIMATE > ICE CORE RECORDS > ISOTOPES ...

Dec 30, 2010 ... EPICA: 740000-year Deuterium Record in an Ice Core from Dome C, Antarctic. Entry ID: EPICA_740000-yearDeuteriumRecordIceCoreDomeC ...

This data set includes carbon-14 measurements on atmospheric methane obtained from air bubbles in glacial ice at the Pakitsoq outcrop in western Greenland, ...

Abstract: This data set includes a record of cosmogenic radionuclide concentrations in the Siple Dome A ice core collected as part of the West Antarctic ice ...

Oct 21, 2008 ... Ice core paleoclimatology. Entry ID: ASAC_757. [ Update this Record ]. Updating this record requires registration. (Account holders) ...

Abstract: Nitrous oxide (N2O) records from the Byrd (Antarctica) 1968 ice core ... data include the ice core depth, mean age of the air and N2O ...

of CH4 concentrations from ice cores with modern records. The ice core shows an increase in CH4 concentrations from 823 ppbv in ... 1841 to ...

This site from the Carbon Dioxide Information Analysis Center features a graph of CO2 levels in entrapped air from the Vostok Ice-Core.

Jun 30, 2011 ... This data set includes backscattered electron images of tephra samples extracted from the Siple and Taylor Dome ice cores, ...

Oct 21, 2008 ... This work has potential to improve the use of beryllium-10 as a ... PALEOCLIMATE > ICE CORE RECORDS > NITROUS OXIDE � Parameter Definition ...

Public An ice core drilling expedition is proposed for Aurora Basin, between Law Dome and Dome C. This will provide a climate record in excess . ...

This site from the Carbon Dioxide Information Analysis Center features a graph of historical temperature variations from the Vostok Ice-Core.

Abstract: Greenland ice-core records provide an exceptionally clear picture of many aspects of abrupt climate changes, and particularly of those associated with ...

trapped gases in the A, E and F trenches. Specifically ... PALEOCLIMATE > ICE CORE RECORDS > ICE CORE AIR BUBBLES > ELEMENTAL AND ISOTOPIC ...

trapped gases in the A, E and F trenches. Specifically, the d15N of ... PALEOCLIMATE > ICE CORE RECORDS > ICE CORE AIR BUBBLES > ELEMENTAL AND ISOTOPIC ...

... EARTH SCIENCE > PALEOCLIMATE > ICE CORE RECORDS > ICE CORE AIR BUBBLES ... Place_Keyword_Thesaurus: GCMD; Place_Keyword: CONTINENT > NORTH AMERICA > ...

... Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > ICE CORE RECORDS > ICE CORE AIR BUBBLES ... Place_Keyword: CONTINENT > NORTH AMERICA > GREENLAND ...

in ice cores 12-1'4 and to changes in tree ring densities. 15-17. According ..... records and proxies (i.e., ice cores and tree rings). ...

methane (CH4) concentrations from the EPICA Dome C ice core (Antarctica). [ Abstract] ... Holocene N2O ice core record and its relationship with CH4 and CO2 , ...

... Recently, ice core records from both hemispheres, in conjunction with other proxy records (eg, tree rings, speleothems and corals), have shown that ...

... with detailed correlation with records from two-drill cores located - 10 ... The core drilling was completed in June 1992 and the cores have been ...

US ITASE-03-7 ice core (Research funded by NSF OPP) Entry ID: US_ITASE-03-7. [ View Full Record ]. [ Update this Record ]. Updating this record requires ...

Twenty-Three Century-scale Ice Core Records of Hydrogen Peroxide (H2O2) from West Antarctica Entry ID: NSIDC-0392. [ View Full Record ] ...

Ice-core records show that climate changes in the past have been large, rapid, and synchronous over broad areas extending into low latitudes, with less variability over historical times. These ice-core records come from high mountain glaciers and the polar regions, including small ice caps and ...

Ice-core records show that climate changes in the past have been large, rapid, and synchronous over broad areas extending into low latitudes, with less variability over historical times. These ice-core records come from high mountain glaciers and the polar regions, including small ice caps ...

Abstract: This MSA record (1841-1995) is from a Law Dome ice core called "DSS" in East Antarctica. It was calibrated against satellite sea ice records and ...

Short Paper Ice-core pollen record of climatic changes in the central Andes during the last 400 yr of Washington. All rights reserved. Keywords: Altiplano; Climate change; Ice core; Little Ice Age; Pollen to record the vegetation responses to climate fluctuations at decadal ...

This NOAA website provides a summary of the Greenland Ice Core Project, which resulted in a 3029 m long ice core drilled in Central Greenland from 1989 to 1992. The core reveals information on past environmental and climatic changes that are stored in the ice. Isotopic ...

Peru, 1989, Geophysical Monograph 55, American Geophysical Union Tropical Ice Core Paleoclimatic Records: Quelccaya Ice Cap, Peru, A.D. 470 to 1984, ...

Record Search Query: Iron, manganese and aluminium in East Antarctic snow and ice cores. Entry ID: trace_metals. [ View Full Record ]. [ Update this Record ] ...

US ITASE-02-7 (100k site) ice core (Research funded by NSF OPP) Entry ID: US_ITASE-02-7_100k_site. [ View Full Record ]. [ Update this Record ] ...

Quelccaya Summit (Peru) Ice Core from WDC for Paleoclimatology Entry ID: EARTH_LAND_NGDC_PALEOCL_QUELCCA. [ View Full Record ]. [ Update this Record ] ...

Ice cores from Greenland and Antarctica provide multiple proxy records of climatic and environmental parameters. They reveal the anthropogenic impact on aerosol concentrations in Greenland snow (i.e., S04 and N03) and on atmospheric greenhouse gases. For ...

Nitrogen and Argon Isotope Data from GISP2 Ice Core Entry ID: SEVERINGHAUS_GISP2 . [ View Full Record ]. [ Update this Record ] ...

Historical CO2 Record from the Siple Station Ice Core (1734-1983), in CDIAC, Online Trends Entry ID: CDIAC_CO2_SIPLE_ICECORE ...

GRIP Ice Core Beryllium 10 Data, 386000 years. Entry ID: NOAA_NCDC_PALEO_2002- 085. [ View Full Record ]. [ Update this Record ] ...

Available online 13 March 2006 Abstract Over the last two decades, ice core records have been systematically Agassiz hypothesized the existence of ice ages. This hypothesis formed the basis of the astronomical�c) and as 400-yr averages on its respective age scale (Fig. 4d�f). The longest ...

Ice cores provide the world's most complete and continuous record of climatic change back through the last ice age and into the last interglacial period. ...

Previous studies have used melt layers in Arctic ice cores to infer Holocene ... climatic events such as the Little Ice Age and the Medieval Warm Period. ...

Nov 9, 2006 ... Even if climate records from Greenland and Antarctic ice cores look ... As the Danish partner within EPICA, The Ice and Climate group has ...

Earth's climate record, preserved in tree rings, ice cores, and coral reefs, ... For example, at the end of the last ice age, when the Northeast United ...

an international collaboration ... (Greenland Ice Sheet Program [GISP]) between the USA, Denmark, and Switzerland. Both the Byrd Station and Dye 3 ...

An environmental record of lead isotopes over four centuries at Law Dome, .... Iron, manganese and aluminium in East Antarctic snow and ice cores ...

This project is intended to provide a record of cosmogenic radionuclides, ... Cosmogenic Radionuclides in the WAIS Divide Ice Core [welten_0636964] ...

Recently, ice core records from both hemispheres, in conjunction with other proxy records (e.g., tree rings, speleothems and corals), have shown that the Little Ice Age (LIA) was spatially extensive, extending to the Antarctic. This paper examines the tem...

In this activity, students learn about efforts to study Earth's climatic history for the last 250,000 years by drilling into the Greenland Ice Sheet and examining ice cores. They will answer questions about the project, examine a cross section of the ice sheet and a stratigraphic column of the ...

Full understanding of Antarctic sea-ice variability suffers from scarcity of data in the pre-satellite era. Although sea-ice variability is but one of many factors affecting Antarctic ice cores, ice-core records from the adjacent continental ice sheet ...

- tica (EPICA). It has nearly doubled the age record for an ice core -- previously set by a core drilled

The Baldwin Gacier serves as a reference record for an examination of the Victoria Lower Glacier. During the 99-00 season, two firn cores were recovered ...

Iron, manganese and aluminium in East Antarctic snow and ice cores. Entry ID: trace_metals. [ View Full Record ]. [ Update this Record ] ...

Dec 19, 2005... with the oxygen isotope record as a way to calibrate those results. ... of the Earth wetlands covered because the abundance of life in ...

Iron, manganese and aluminium in East Antarctic snow and ice cores. Entry ID: trace_metals. [ View Full Record ]. [ Update this Record ] ...

Two arguments are presented, one in favor of the existence of thicker ice in the Arctic Ocean during glacial time, and the other in favor of a full-fledged Arctic ice cap. The first is based on the Greenland air temperature record obtained from isotopic studies of the Camp Century ice core. The ...

Jan 8, 2009 ... US ITASE-99-1 ice core (Research Funded by NSF OPP). Entry ID: US_ITASE-99-1. [ Get Data ]. [ Update this Record ] ...

The main objectives of our paleoclimate research in the Tien Shan mountains of middle Asia combine the development of detailed paleoenvironmental records via the physical and chemical analysis of ice cores with the analysis of modern meteorological and hy...

This data set contains ion data from the GRIP ice core, as well as organic acids , oxygen isotopes and layer thickness. Showing 1 through 50 of 56 Next ...

nitrous oxide (N2O) and methane (CH4) records measured along two ice cores ... amplitudes of CH4 oscillations associated with D-O events are similar to those ...

The European Project for Ice Coring in Antarctica Dome C ice core enables us to extend existing records of atmospheric methane (CH4) and nitrous oxide (N2O) ...

This activity was developed during the Teaching Climate Change Using Ice Core Data workshop, held in June 2008.Contributors: Christopher Hill, Sherri Baker-Littman, Kevin Nolan, Ester Sztein Course level: ...

An ice core was drilled at Taylor dome, East Antarctica, reaching to bedrock at 554 meters. Oxygen-isotope measurements reveal climatic fluctuations through the last interglacial period. To facilitate comparison of the Taylor Dome paleoclimate record with...

Feb 16, 2011 ... Abstract: A compilation of 700 years of Law Dome major ion chemistry data, recorded from 3 ice cores; DSS97, DSS99, DSS main. ...

Add new dataset or dataservice records to GCMD � What's New � Participate ... Abstract: This data set contains the Greenland Ice Sheet Project II (GISP2) ...

Using images and graphs, this interactive resource illustrates scientists' efforts to study Earth's climatic history for the last 250,000 years by drilling into the Greenland Ice Sheet and examining ice cores. Adapted from the Wright Center for Science Education, Tufts University.

... changes are paralleled by an increase in summer melting on the Devon Ice Cap, as revealed by ice-core studies (Fisher and ... varved lakes along the margin of the Agassiz Ice Cap. Master's thesis, ... a ...

The Holocene sea-ice project brings together for the first time, records from ... extra radiocarbon dates and integration with data from Law Dome ice-core. ...

The oxygen-18/oxygen-16 ratio of molecular oxygen trapped in ice cores provides a time-stratigraphic marker for transferring the absolute chronology for the Greenland Ice Sheet Project (GISP) II ice core to the Vostok and Byrd ice cores in Antarctica. ...

Four ice cores from the Agassiz ice cap in the Canadian high arctic and one ice core from the Renland ice cap in eastern Greenland have been synchronized to the Greenland Ice Core Chronology 2005 (GICC05) which is based on annual ...

The Arctic holds extensive records of past climatic and environmental changes. Stable isotope variations in polar ice are in many cases important records of paleoclimatic information. Deep ice cores from Antarctica and Greenland, reaching back through the...

Mar 8, 2011 ... Abstract: This MSA record (1841-1995) is from a Law Dome ice core called "DSS" in East Antarctica. It was calibrated against satellite sea ...

Long-term variability in the global carbon cycle inferred from a high precision CO2 and d13C ice core record . Tellus, 51 (2): 233-248. ...

Paleoclimate records from ice cores are based on the assumption that the stratigraphy is relatively simple and that the ice at the bottom of the ice sheet is undisturbed. The search for the oldest ice has targeted low accumulation areas such as Dome A and deep basins such ...

The Larsen Ice Shelf system is hypothesized to be an important indicator of the stability of Antarctic continental ice as the Antarctic continent warms. With large air temperature increases of up to 3�C since 1950, the Antarctic Peninsula has seen rapid changes. These include the apparently spontaneous collapse of ice shelves in the ...

This site explains what can be learned from an ice core. Scientists collect ice cores by driving a hollow tube deep into the ice sheets of Antarctica and Greenland (and in glaciers elsewhere). The cylinders of ancient ice that they retrieve provide a detailed ...

Methane synchronisation is a concept to align ice core records during rapid climate changes of the Dansgaard/Oeschger (D/O) events onto a common age scale. However, atmospheric gases are recorded in ice cores with a log-normal-shaped age distribution probability density ...

... 42.94�E, 7000 m a.s.l.) ice caps (Fig. 1). These ice cores are in the ... D. 1500 from the Dunde, Guliya, and Dasuopu ice caps, respectively. These provide the basic data for us ... ...

N2O, CH4 and CO2 Data from Dome C Ice Core (Antarctica) Covering the Holocene, ... Holocene N2O ice core record and its relationship with CH4 and CO2, ...

Three deep Antarctic ice cores reach back in time at least into the last glaciation and one extends over the entire last climatic cycle (160.000 years). In comparison with current Holocene conditions, ice core studies suggest that the Last Glacial Maximum...

The analyses of two ice cores from a southern tropical ice cap provide a record of climatic conditions over 1000 years for a region where other proxy records are nearly absent. Annual variations in visible dust layers, oxygen isotopes, microparticle concentrations, conductivity, and ...

The analyses of two ice cores from a southern tropical ice cap provide a record of climatic conditions over 1000 years for a region where other proxy records are nearly absent. Annual variations in visible dust layers, oxygen isotopes, microparticle concentrations, conductivity, and ...

A 102-m-long ice core retrieved from the Malan Ice Cap on the Tibetan Plateau provides us with a historical record of the microorganisms trapped in the ice. The microorganisms in the Malan ice core are identified as ?, ?, and ?-Proteobacteia, and the ...

The authors report on methanesulfonate and non-seasalt sulfate found in an artic ice core from Greenland. The ice core record stretches back in time roughly 130,000 years, through a full glacial cycle. This record reveals a decreasing concentration of MSA with the advance ...

in the amount of melt on the adjacent Agassiz Ice Cap, as recorded in ice cores. There appears to have been, the amount of melting on the Agassiz Ice Cap and Eureka 900 mb air temperature records suggests that changes to a persistent zone of high pressure over the region) ...

This is a commentary on global circulation model experiments of moisture source changes in Greenland, urging caution in how they are applied because they have important implications for paleoclimate reconstruction from ice cores. The work comes from preliminary find is of a ice core (GISP2) of the authors. The ...

An ice core drilled at Dome C, Antarctica, is the oldest ice core so far retrieved. On the basis of ice flow modelling and a comparison between the deuterium signal in the ice with climate records from marine sediment cores, the ...

of geochemical parameters for climatic periods at the end of the last ice age as measured in GISP2 d18 Oice a [CH^kitsoq that range from full glacial conditions through the climate reversals at the end of the last ice age than deep ice-coring projects, but they also pose specific challenges. The first challenge is age

of natural climate recorders such as terrestrial and marine sediments, ice cores, pollen, tree rings and peri-glacial features in the landscape The primary function of the...

Glaciochemical and accumulation rate records developed from four ice cores .... Soil bulk density is defined as the ratio of the mass of dry solids to the ...

Design of a shrouded probe for airborne aerosol sampling in a high velocity ... EARTH SCIENCE > PALEOCLIMATE > ICE CORE RECORDS > PARTICULATE MATTER ...

... Corporate Author : LABORATOIRE DE GLACIOLOGIE ET GEOPHYSIQUE DE L'ENVIRONNEMENT SAINT-MARTIN D'HE RES (FRANCE). ...

Dec 6, 1993 ... In his study, Pang drew on evidence found in tree rings, ice cores and in the historic records of civilizations in Europe and China. ...

Sep 22, 2005... firn and ice cores to quantify the variability of climate record with analysis of temperature, crystal structure, crystal geometry, ...

Oct 27, 2010 ... Charcoal layers in sediments and methane concentration in ice cores show ... The charcoal records, derived from lake sediments and peats at ...

... Mosley-Thompson, P.-N. Lin, K. Henderson and T. Mashiotta, "Tropical ice core records: evidence for asynchronous glaciation on Milankovitch timescales. ...

The comparison of two shallow ice cores recovered in 1999 and 2000 from the same place on the Chimborazo summit glacier revealed the influence of the coincident Tungurahua volcanic eruption on their stable isotope and chemical records. The surface snow melting and water percolation induced from the ash deposition caused a preferential ...

primary sink for hydroxyl radical (OH) (and therefore influences the oxidizing capacity of the atmosphere) and because the concentrations of three major ...

primary sink for hydroxyl radical (OH) (and therefore influences the oxidizing capacity of the atmosphere) and because the concentrations of three major ...

Oceans ocean temperature , salinity ... Paleoclimate thumbnail, photo credit USDA Pollen Lab Paleoclimate ice cores, land records ... Solid Earth thumbnail Solid Earth...

Home � Data Sets � Data Services � Learn about GCMD's portal collaborations. Add new dataset or dataservice records to GCMD � What's New � Participate ...

Jul 19, 2011 ... PALEOCLIMATE > ICE CORE RECORDS > ISOTOPES > FIRN AIR ISOTOPES � Parameter Definition ... Argon Isotopes � Atmospheric Gases ...

Reconstruction of atmospheric CO2 from ice-core data and the deep-sea record of Ontong Java plateau: the Milankovitch chron. ...

Abstract: This data set contains the record of stable isotopes of hydrogen and oxygen in the WAIS Divide WDC06A core from West Antarctica. ...

... conditions in the Arctic, with measurements from ice cores, sediments and other Earth materials that record temperature and other conditions." To ... ...

Records of methane, and oxygen isotopes (ice and air) for Law Dome DSS (Dome Summit South) core through the last deglaciation (9000-19000 before present). ...

Ice core records show atmospheric methane mixing ratio and interpolar gradient varying with climate. Changes in wetland sources have been implicated as the ...

Full understanding of Antarctic sea-ice variability is hindered by limited detailed records beyond the satellite era. Ice-core records from the adjacent continental ice sheet offer a possible solution to this problem. Here we apply new tools from the field of artificial neural networks (ANNs) ...

High-resolution, continuous multivariate chemical records from a central Greenland ice core provide a sensitive measure of climate change and chemical composition of the atmosphere over the last 41,000 years. These chemical series reveal a record of change in the relative size and intensity of the circulation ...

Recently, ice core records from both hemispheres, in conjunction with other proxy records (e.g., tree rings, speleothems and corals), have shown that the Little Ice Age (LIA) was spatially extensive, extending to the Antarctic. This paper examines the temporal and spatial characteristics of the ...

Two technical comments are presented on an article by Zielinski concerning the GISP ice core record of volcanic activity in 7000 BC, including a detailed record of the volcanic contribution to sulfate concentrations. The authors describe concerns about (1) correct C14 dating for known eruptions correlated to ...

We explore methods of dating a 101 m ice core from a bare ice ablation area in the Yamato Mountains, Dronning Maud Land, East Antarctica. There are two unknowns, the age of the ice at the surface and the age spanned by the core. The ice crystal growth rate was used to ...

In 2003, six ice cores measuring 10.5, 11.5, 11.8, 12.4, 114 and 460 meters were recovered from the col between Mount Bona and Mount Churchill (61� 24'N; 141� 42'W; 4420 m asl). These cores have been analyzed for stable isotopic ratios, insoluble dust content and concentrations of major chemical species. Total Beta radioactivity ...

A general discussion is given of climate variability over the last 1500 years as interpreted from two ice cores from the Quelccaya ice cap, Peru. The possible role of climatic variability in prehistory over this period is discussed with emphases on (1) relationships between climate and the rise and decline of coastal and highland ...

A high-resolution ice core record from Dasuopu, Tibet, reveals that this site is sensitive to fluctuations in the intensity of the South Asian Monsoon. Reductions in monsoonal intensity are recorded by dust and chloride concentrations. The deeper, older sections of the Dasuopu cores suggest ...

Abstract: This data set contains sub-annually resolved concentrations of hydrogen peroxide (H2O2), snow, firn and ice from 23 sites on the West Antarctic ...

Abstract: Atmospheric concentrations of methane (CH4) have been derived from ice core data in Antarctica for nearly 160000 years. The 2083-m-long ice ...

ice-drilling project between Russia, the United States, and France at .... Comparison of CO2 measurements by two laboratories on air from bubbles ...

Abstract: A team of eight scientists will visit James Ross Island to recover the first complete ice core climate record from the northern Antarctic ...

The volcanic record in the ANDRILL McMurdo Ice Shelf AND-1B drill core M. Pompilio,1 P. Kyle,2 T. Wilch,3 N record in the ANDRILL McMurdo Ice Shelf AND-1B drill core. in Antarctica: A Keystone in a Changing World project drilled and cored the McMurdo ...

Back trajectory analysis, provided by the British Atmospheric Data Centre using meteorological parameters from the European Centre for Medium-Range Weather Forecasts (ECMWF) reanalysis ERA-40 (1980-2001) and operational analysis (2002-2006), is used to investigate transport pathways and source regions of climate proxies preserved in a new ice core (Gomez) ...

Three ice cores to bedrock from the Dunde ice cap on the north-central Qinghai-Tibetan Plateau of China provide a detailed record of Holocene and Wisconsin-W�rm late glacial stage (LGS) climate changes in the subtropics. The records reveal that LGS conditions were apparently colder, wetter, ...

Two ice cores, covering 1500 years of climatic information, from the summit (5670 meters) of the tropical Quelccaya ice cap, in the Andes of southern Peru, provide information on general environmental conditions including droughts, volcanic activity, moisture sources, temperature, and glacier net balance. The net balance ...

Three ice cores to bedrock from the Dunde ice cap on the north-central Qinghai-Tibetan Plateau of China provide a detailed record of Holocene and Wisconsin-Wuerm late glacial stage (LGS) climate changes in the subtropics. The records reveal that LGS conditions were apparently colder, wetter, ...

trends were obtained for the period 1734-1983 from the core and show an increase in CO2 of 22.5% from 1750 to 1984. The Siple Station data ...

Jul 7, 2011 ... The five cores used in the Antarctic deglacial water isotope composite are: Law Dome, Byrd, EPICA Dronning Maud Land (EDML), Siple Dome ...

In a previous study, past summer temperatures were reconstructed from melt features in the Belukha ice core, Siberian Altai. We evaluated the climatic representativeness of net accumulation and melt features by comparing two Belukha ice cores retrieved at neighboring sites by different institutions and dated by ...

This paper looks the the dramatic changes in methane levels in the atmosphere following the end of the last glacial period, and during the Oldest and Younger Dryas. Levels are inferred from measurements made on ice core samples. The rate of changes required to account for the dramatic increase seems unlikely to be explainable based on biologic sources. The ...

PALEO RECORDS OF BIOTIC AND ABIOTIC PARTICLES IN POLAR ICE CORES John Priscu, Christine Foreman characteristics (biotic andWAIS particle characteristics (biotic and abiotic) Dissolved Organic Carbon (food. Biotic (bacteria) and abiotic particle distribution from a shallow WAIS Di id ti bt i d ith Mi t fl t t

An Andean ice-core record of a Middle Holocene mega-drought in North Africa and Asia Mary E. DAVIS North Africa to eastern China, evidence of which occurs in historical, archeological and paleoclimatic~o�Southern Oscillation (ENSO) and positive North Atlantic Oscillation (NAO) indices, and with aridity in North Africa

because analyzing larger particles minimizes the effect of particle size and shape on quantitative x-ray particles >4 mm in diameter were selected for quantitative x- ray analysis. [11] Comparison of the meanA 100-year record of North Pacific volcanism in an ice core from Eclipse Icefield, Yukon Territory

Temperature profiles of first-year landfast sea ice have been recorded continuously over the 2003 winter growth season at McMurdo Sound, Antarctica. The temperature gradients in the ice were used to calculate the growth rate due to conductive heat flux, which is shown to account for only part of the total ice ...

of the last interglacial and glacial inception in Greenland based on new gas measurements in the Greenland Ice, it is possible to attribute the age of an unknown layer by comparison to records from different ice cores). This comparison enables the attribution of constrained ages for several ice ...

(USGS) jointly manage and operate the National Ice Core Laboratory (NICL) ... researchers from the ice core community. NICL provides a state of the art ice ...

This paper presents the first ice core measurements of methyl bromide (CH3Br). Samples from a shallow Antarctic ice core (Siple Dome, West Antarctica), with estimated gas dates ranging from 1671 to 1942, were analyzed using GC/MS. The ice core samples gave a mean CH3Br ...

This site, hosted by Ohio State University, contributes to our understanding of the complex interactions within the Earth's coupled climate system through the collection and study of a global array of ice cores. These acquisitions provides high resolution climatic and environmental histories that will include ice ...

The oxygen-18/oxygen-16 ratio of molecular oxygen trapped in ice cores provides a time-stratigraphic marker for transferring the absolute chronology for the Greenland Ice Sheet Project (GISP)II ice core to the Vostok and Byrd ice cores in Antarctica. ...

The oxygen-18/oxygen-16 ratio of molecular oxygen trapped in ice cores provides a time-stratigraphic marker for transferring the absolute chronology for the Greenland Ice Sheet Project (GISP) II ice core to the Vostok and Byrd ice cores in Antarctica. ...

Spacer Why? Objectives Contributions Links Timeline Home Why Study Ice Cores Why? Collage - Why Study Ice Cores? Ice cores contain an abundance of climate information --more so...

As part of the effort to create the new Greenland Ice Core Chronology 2005 (GICC05) a synchronized stratigraphical timescale for the Holocene parts of the DYE-3, Greenland Ice Core Project (GRIP), and North Greenland Ice Core Project (NGRIP) ice ...

However, when compared to the Be-10 record in polar ice cores, and C-14 in tree rings, the space era has experienced a relative minimum in cosmic-ray ...

Dataset Title: Historical CO2 records from the Law Dome DE08, DE08-2, and DSS ice cores. Dataset Series Name: Trends: A Compendium of Data on Global ...

In contrast, the N2O record shows maximum concentrations of 278 +/- 7 .... High resolution Holocene N2O ice core record and its relationship with CH4 and ...

A 1000-yr record of forest fire activity has been developed using three annually dated ice cores from Eclipse Icefield, Yukon, Canada. Forest fire signals were identified as ... ...

A record of explosive eruptions over the last 1830 years reconstructed from a South Pole, Antarctica, ice core extends the coverage of volcanic history to the start of the first millennium A.D. The ice core dating by annual layer counting carries an uncertainty of �2% of the number of years ...

A 51 m deep ice core was re-drilled on the Dunde Ice Cap of western China in 2002, 15 years after the previous ice core drilling in 1987. Dating by seasonal variations in ?18O and particle concentration showed that this 51 m deep ice core covered ...

This study uses ice core methanesulphonic acid (MSA) records from the Antarctic Peninsula, where temperatures have been warming faster than anywhere else in the Southern Hemisphere, to reconstruct the 20th century history of sea ice change in the adjacent Bellingshausen Sea. Using satellite-derived sea ...

The Antarctica Peninsula has a rapidly changing climate, however there is a paucity of long term meterological observations of temperature across the region. Decadal to centennial ice cores records can potentially help to fill this gap. Interpretation of the ice cores requires an understanding ...

Atmospheric carbonyl sulfide (COS) has received increased attention because of its potential use as a carbon cycle tracer. The uptake of atmospheric COS by terrestrial vegetation represents about 80% of its total atmospheric sink, thus potentially linking temporal variability in atmospheric COS levels to changes in gross primary productivity. We are exploring the use of polar ...

In this activity, students will explore the characteristics of ice and explain the influencing factors by using Internet connections to polar field experiences, making their own ice cores and taking a field trip for obtaining a local ice core. The students will practice scientific journaling to ...

Since 1985, the ?18O content of the surface ice has been studied at several ice-margin locations in Greenland. A provisional chronology for the ice margin records was established by correlating characteristic ?18O-features in the ice margin records with similar features in ...

The North Greenland Eemian Ice Drilling (NEEM) is an international ice core research project aimed at retrieving an ice core from North-West Greenland (77.45�N 51.06�W) reaching back through the previous interglacial period. After three field seasons of drilling, bedrock at NEEM was reached ...

Major volcanic eruptions disperse large quantities of sulfur compound throughout the Earth's atmosphere. The sulfuric acid aerosols resulting from such eruptions are scavenged by snow within the polar regions and appear in polar ice cores as elevated acidity layers. Glacio-chemical studies of ice cores ...

This page contains a collection of ice microbe and lake ice images. Visuals include: scanning electron micrographs of Dry Valley Lake ice; scanning electron and atomic force micrographs of Lake Vostok ice core; and sediment layer and ice bubble formation of lake ...

Within the framework of the U.S. Greenland Ice Core Science Project (GISP2), an ice core, known as the GISP H-Core, was collected in June, 1992 adjacent to the GISP2 summit drill site. The project scientists, Gisela A.M. Dreschhoff and Edward J. Zeller, were interested in dating solar proton ...

Greenland ice core records provide clear evidence of rapid changes in climate in a variety of climate indicators. In this work, rapid climate change events in the Northern and Southern hemispheres are compared on the basis of an examination of changes in atmospheric circulation developed from two ice ...

The Greenland NGRIP ice core continuously covers the period from present day back to 123 ka before present, which includes several thousand years of ice from the previous interglacial period, MIS 5e or the Eemian. In the glacial part of the core annual layers can be identified from impurity ...

The isotope (dO18 or dD) variability in ice cores from non-tempered Alpine glaciers might provide long term temperature proxy records at mid-latitudes supplementing respective Polar records. Concerning the last millennium, this exclusively applies to the low accumulation Colle Gnifetti (4450 m asl, Swiss-Italian ...

A new 3085m deep ice core has been retrieved from (75.1N, 42.3W), the northern part of the Greenland Ice Sheet. The North GReenland Ice core Project was initiated in 1996 by an international team of researchers from Denmark, Belgium, France, Germany, Iceland, Japan, Sweden, Switzerland and USA ...

At present, continuous instrumental temperature records for Greenland reach back to the late nineteenth century at a few sites. Combining early observational records from locations along the south and west coasts, it has been possible to extend the overall record back to the year 1784. The new extended Greenland temperature ...

Three near-monthly resolution 10Be records are presented from the Dome Summit South (DSS) ice core site, Law Dome, East Antarctica. The chemical preparation and Accelerator Mass Spectrometer (AMS) measurement of these records is described. The reproducibility of 10Be records at DSS is assessed ...

Three near-monthly resolution 10Be records are presented from the Dome Summit South (DSS) ice core site, Law Dome, East Antarctica. The chemical preparation and Accelerator Mass Spectrometer (AMS) measurement of these records is described. The reproducibility of 10Be records at DSS is assessed ...

The operations described in this report are separated into two sections, one involving the high-resolution sampling, analysis,-and interpretation of a firn core from Windless Bight Antarctica and a second section concerned with the acquisition of a 120 meter firn core from the GISP2 site in Central Greenland. Most of the Antarctic work is involved with ...

The operations described in this report are separated into two sections, one involving the high-resolution sampling, analysis, and interpretation of a firn core from Windless Bight Antarctica and a second section concerned with the acquisition of a 120 meter firn core from the GISP2 site in Central Greenland. Most of the Antarctic work is involved with ...

The Altai and Tien Shan ice cores records are expanding our understanding of the inter-Hemispheric water cycle and climate dynamics: the moisture advection from Atlantic and Pacific Oceans, and from Aral-Caspian closed drainage basin to the Arctic Ocean defining the interaction over time between the westerly jet stream, and the Asian ...

Ice cores from Penny Ice Cap, Baffin Island, Canada, provide continuous Holocene records of oxygen isotopic composition (delta18O, proxy for temperature) and atmospheric impurities. A time scale was established with the use of altered seasonal variations, some volcanic horizons, and the age for the end of the ...

The discovery in recent years of abrupt climatic changes in climate proxy records from Greenland ice cores and North Atlantic sediment cores, and from other sites around the world, has diverted attention from gradual insolation changes caused by Earth`s orbital variations to more rapid processes on Earth`s surface ...

A clear negative trend is found in the nitrogen isotopic ratios (15N/14N) of nitrate over the industrial period, based on a 100-meter ice core from Summit, Greenland. This record indicates that isotopic composition of ice core nitrate reflects changes in nitrogen oxide (NOx) source emissions ...

An investigation of tabular massive ground ice was conducted to ascertain if ground ice has distinctive characteristics that could be measured and used to determine the origin of the ice. Initial studies were conducted on Bylot Island in the eastern Canadian Arctic, where some glaciers are rapidly retreating, resulting in buried ...

Operations have been concentrated on the micro-resolution analysis of the 120 meter ice core that was collected in Greenland in June, 1992. Thus far, 64 meters of the ice core have been sampled and a total of over 4000 individual samples have been analyzed for both nitrate and electrical conductivity. It has been ...

Precise knowledge of the phase relationship between climate changes in the two hemispheres is a key for understanding the Earth's climate dynamics. For the last glacial period, ice core studies have revealed strong coupling of the largest millennial-scale warm events in Antarctica with the longest Dansgaard-Oeschger events in Greenland through the Atlantic ...

One of the major difficulties in paleontology is the acquisition of fossil data from the 10% of Earth�s terrestrial surface that is covered by thick glaciers and ice sheets. Here we reveal that DNA and amino acids from buried organisms can be recovered from the basal sections of deep ice cores and allow reconstructions of past flora ...

Proxy records of biogenic sulfur gas obtained from ice cores suggest that variability in marine biogenic sulfur emissions may reflect changes in climate. Increased sea-ice extent has previously been proposed as one cause of relatively high methanesulfonic acid (MSA) in glacial-age ice ...

Human activities including fossil fuel burning are currently altering the global climate system at rates faster than ever recorded in geologic time. Biomass burning causes carbon dioxide emissions equal to 50% of those from fossil-fuel combustion and so are highly likely to influence future climate change. However, aerosols continue to be one of the least understood aspects of ...

, University of Copenhagen, Juliane Maries vey 30, DK-2100 Copenhagen, Denmark a r t i c l e i n f o Article Greenland ice cores show a very strong, reproducible pattern of alternation between warm Greenland Interstadials (GI) and cold Greenland Stadials (GS) at millennial- scale during the last glacial period. Here we

The NCCR Climate program `Varves, Ice cores, and Tree rings -- Archives with annual resolution (VITA)' aims to compare proxy climate records from trees, lakes, peat bogs and glaciers within the Engadine region, South-East Switzerland. The focus of this work is the ice core component of the VITA ...

A 55-m long ice core, drilled close to bedrock from Mt. Noijin Kangsang on the southern Tibetan Plateau in summer 2007, was annually dated covering the period of 1864-2006 AD. The stable isotope ratios (? 18O and ?D) of the ice core were measured and thereby the deuterium excess (d) was calculated by d = ?D - 8*? ...

This report presents the data for the Vostok - Devils Hole chronology, termed V-DH chronology, for the Antarctic Vostok ice core record. This depth - age relation is based on a join between the Vostok deuterium profile (D) and the stable oxygen isotope ratio (18O) record of paleotemperature from a calcitic ...

Entering an era of global warming, the stability of the Greenland ice sheet (GIS) is a major concern, especially in the light of new evidence of rapidly changing flow and melt conditions at the GIS margins. Hence it is imperative to advance our understanding of GIS dynamics by studying the response of the GIS to past climatic change. In this study we extract both the Holocene ...

The Patagonia icefields constitute a unique location in the Southern Hemisphere for obtaining non-polar paleo-records from ice cores south of 45� S. Nevertheless, no ice-core record with meaningful paleoclimate information has yet been obtained from Patagonia. This deficiency is due to ...

Methyl chloride (CH3Cl) is a naturally occurring ozone-depleting substance and a significant component of the atmospheric chlorine burden. In this study CH3Cl was analyzed in air bubbles from the West Antarctic Siple Dome deep ice core with gas ages ranging from about 65 kyr BP to the Late Holocene. CH3Cl levels were below the modern Antarctic atmospheric ...

A high-resolution deuterium profile is now available along the entire European Project for Ice Coring in Antarctica Dome C ice core, extending this climate record back to marine isotope stage 20.2, approximately 800,000 years ago. Experiments performed with an atmospheric general circulation ...

Stable isotopic, aerosol, and physical stratigraphy provided by new ice-core records from the Quelccaya ice cap (5670 masl) in Peru provide annual time series of tropical climatic and environmental variations extending back to 315 AD. These records present an opportunity to extract new information about links ...

ice core records shows clear 100 ka cycle! #12;36 Temperature The sun has controlled global temperature, global temperatures fall, and large ice packs form in the polar oceans.The white ice reflects more solar a faster rise in global temperatures.In a matter of centuries,a brutally hot,wet ...

(Shackleton et al., 2004). However, so far there is no direct way to obtain absolute ages for ice core records, Antarctica, over the last 150 000 years, submitted, 2007. 366 #12;CPD 3, 365�381, 2007 Synchronization of ice be linked via global gas parameters. Here the complication is, that the age of the gas ...

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Feb 15, 2010 ... Abstract: This data set contains measurements of impurities and ions in three polar ice cores: the Vostok 5G ice core and the Byrd ice core ...

of the crystal c-axes (fabric) of ice core samples collected from the ... Dataset Title: Ice Fabric Characteriestics: Siple Dome, A Core ...

of the crystal c-axes (fabric) of ice core samples collected from the. Siple Dome Ice Core A, .... 'Fabric and Texture at Siple Dome,' to be submitted to ...

Climatic changes have been reconstructed for the Tibetan Plateau based on ice core records. The Guliya ice core on the Tibetan Plateau presents climatic changes in the past 100,000 years, thus is comparative with that from Vostok ice core in Antarctica ...

The ?18O record in deep-sea sediments show a significant reduced amplitude of the ice volume variations before Marine Isotope Stage 11, about 400 ka ago, with less warm interglacials and less cold glacials. The deuterium temperature and the greenhouse gases records in the Antarctic ice cores ...

Climate history from several hundreds of thousand years has been recorded in the terrestrial ice sheets. Drilling deep ice cores though the ice sheets and analyzing the ice and the impurities has assessed this climate history. The visible stratification that is seen the ...

Previous studies have used small numbers of ice core records of past volcanism to represent hemispheric or global radiative forcing from volcanic stratospheric aerosols. With the largest-ever assembly of volcanic ice core records and state-of-the-art climate model ...

The Greenland NGRIP ice core continuously covers the period from present day back to 123 ka before present, which includes several thousand years of ice from the previous interglacial period, MIS 5e or the Eemian. In the glacial part of the core annual layers can be identified from impurity ...

Two ice core initiatives, the 1992 European Greenland Ice Core Project (GRIP) and the 1993 Greenland Ice Sheet Project Two (GISP2), form the longest (combined) ice core paleo-environmental record (over 100,000 years) ever compiled ...

In this study, we present carbonyl sulfide (COS) measurements from an ice core drilled near South Pole, East Antarctica (SPRESSO). The samples are from 135 291 m, with estimated mean COS ages ranging from 278 to 2155 years before present (defined as 2000 C.E.). When combined with the previous records of COS from Antarctic ...

In this study, we present carbonyl sulfide (COS) measurements from an ice core drilled near South Pole, East Antarctica (SPRESSO). The samples are from 135-291 m, with estimated mean COS ages ranging from 278 to 2155 years before present (defined as 2000 C.E.). When combined with the previous records of COS from Antarctic ...

During a five year grant the Ice and Climate group at Niels Bohr Institute, University of Copenhagen is performing annual layer counts in the Dye-3, GRIP and NGRIP ice cores to obtain a Greenland ice core chronology on past climatic and environmental events. The counting is based on seasonal ...

Low-frequency of southern Asian monsoon variability using a 295--year record from the Dasuopu ice in the Himalayas should be extremely important to improve our understanding of Asian monsoon dynamics Himalayas reflects low-frequency variability of monsoon precipitation over the last 295-year. Multi

This collection of Climate Change Graphics is from Earth: Inside and Out, part of the Museum's Seminars on Science series. These distance-learning courses are designed to help educators meet the new national science standards. The collection includes these six graphics: Climate Records in the Ice Core, Changes in Climate, Time Spans ...

Stable water isotope (?18O, ?D) data from a high elevation (5100 masl) ice core recovered from the Tien Shan Mountains, Kyrgyzstan, display a seasonal cycle in deuterium excess (d = ?D - 8*?18O) related to changes in the regional hydrologic cycle during 1994-2000. While there is a strong correlation (r2 = 0.98) between ?18O and ?D in the ...

Glacially-deformed massive ice and icy sediments (MI IS) in the Eskimo Lakes Fingerlands and Summer Island area of the Tuktoyaktuk Coastlands, western Arctic Canada, show, in the same stratigraphic sequences, features characteristic of both basal glacier ice and intrasedimental ice. Basal-ice features comprise (1) ...

We synchronize mm-scale resolution optical profiles of deep South Pole glacial dust together with ice core data between the ages 25 to 95 thousand years B.P. The images were captured with a laser dust logger deployed in six boreholes during construction of the IceCube neutrino detector array, a unique opportunity for demonstrating the ...