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NOAA National Operational Model Archive & Distribution System |
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NOMADS Data AccessNOMADS Data Access by Provider and Data Type
IntroductionThis web site provides access to the model data repository at NCDC. This repository contains both archived (i.e., off-line) and on-line model data. We provide a variety of ways to access our weather and climate model data. You can access the on-line data using traditional access methods (web-based or ftp), or you can use open and distributed access methods promoted under the collaborative approach called the NOAA Operational Model Archive and Distribution System (NOMADS). With the NOMADS Web Interface you can create, display, and download plots, use ftp to download parameters and files, and use the NOMADS Distributed Data Server using OPeNDAP and the GrADS Data Server (GDS) to access the data directly from your preferred client or desktop. You can also perform remote calculations using scripts under the GDS. To see what datasets we have available, first vist the NCDC Model Data Inventories section to locate datasets of interest and view dataset documentation. After you determine which datasets you want to further explore, visit the Data Access Guide page and learn about the different access methods and features provided. To browse the inventories, directly read and analyze data, or retrieve model data visit the sections below. The following access functions are provided.
NCEP High Resolution Global Forecast System (1 degree GFS), North American Mesoscale (12km NAM), and Rapid Update Cycle (20km RUC)The table below lists the weather model datasets we have on-line or archived at NCDC. Each entry in the table below provides you links to access methods for that dataset. See the Section Above for descriptions of these access methods. Note: These data may be delayed up to one day. For real-time access go to the NCEP R/T NOMADS.
NCEP North American Regional Reanalysis (32km, 25 years)Documentation
NARR fields use Earth relative winds, which do not need adjustment when used with GrADS and GDS. Monthly Means:
NCEP GFS Ensemble ProbabilitiesThe following interfaces are testbed capabilities to multiple members of the NCEP Ensembles run under the Global Forecast System. These interfaces allow user selectable flow-dependant probabilities predictions of several meteorological sensible weather elements. These pages are in development. Please report feedback to NOMADS.ncdc@noaa.gov.
Coupled Climate Forecast SystemThe Climate Forecast System (CFS) is a fully coupled model representing the interaction between the Earth's oceans, land and atmosphere. This model became operational in August 2004, and has been run in retrospective mode back 25 years to 1981. Presently, NCDC-NOMADS does not maintain an archive for the Climate Forecast System data. There are plans to archive this dataset in the future. Users seeking access to CFS archived and real-time data should
visit the National Centers for Environmental Prediction's
CFS homepage. Available on the site are retrospective daily and monthly data, climatologies, links to operational CFS model runs, CFS documentation, news, and other products. NCDC Climate DatasetsBelow are several operational data sets provided by the NCDC and NOMADS.
NODC AVHRR Pathfinder Version 5.0 SST DatasetThe 4 km AVHRR Pathfinder Version 5.0 SST Project (Pathfinder V5) is a new reanalysis of the AVHRR data stream developed by the University of Miami's Rosenstiel School of Marine and Atmospheric Science (RSMAS) and the NOAA National Oceanographic Data Center (NODC). This reprocessing uses an improved version of the Pathfinder algorithm and processing steps to produce twice-daily global SST and related parameters back to 1985, at a resolution of approximately 4 km, the highest possible for a global AVHRR data set. Temporal averages for 5-day, 7-day, 8-day, Monthly, and Yearly periods are also produced. Current key improvements over the original 9 km Pathfinder SST data set include a more accurate, consistent land mask, higher spatial resolution, and inclusion of sea ice information. Other improvements are under development and will be implemented in the next reprocessing, which will commence in mid-2004.
NCEP Model GDAS Assimilation Dataset (in BUFR & GRIB format)Below are several operational data sets provided by the NCDC and NOMADS. Please see NCEP (Keyser) for additional background information
on GDAS and other NCEP models. Also visit:
EMC/Mesoscale Modeling Branch Publication Listing.
We will be adding plotting and ftp capabilities as programs are completed.
Climate Model DatasetsThrough the NOMADS Collaboration, model output and documentation from a set of multi-century experiments performed using GFDL's CM2.0 and CM2.1 global climate models are being made available at GFDL's NOMADS Data Portal. Datasets are available at their GFDL CM2.x Coupled Climate Models page. The Community Data Portal (CDP) is a collection of earth science datasets from NCAR, UCAR, UOP, and participating organizations in the following research areas:
Paleoclimate DatasetsThe paleoclimate model data sets available here are derived primarily from climate model experiments associated with peer reviewed scientific publications. The archive includes many of the experiments performed as part of the Paleoclimate Model Intercomparison Project (PMIP), plus other, PMIP-like experiments. Also included here are other model runs such as transient simulations of the past 1,000 years, and some data sets related to model forcing and model boundary conditions. Additional information on paleoclimate model data sets, including tools to access and plot model data and a web form to search for data, are available on the paleoclimate modeling page.
Paleoclimate model output on NOMADS GrADS Data Server National Digital Forecast DatabaseNCDC NOMADS provides access to NCDC's archive of the National Weather Service National Digital Forecast Database (NDFD). Due to the volume of this dataset, access is provided through the NOMADS automated offline order system for one day of data. To place an order, use the access point below. Due to current incompatibilities with our plotting software, the native GRIB2 NDFD data is converted to GRIB1 after the data has been pulled from the HPSS archive. Access NDFD offline order interface Top of Page |
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