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DOE Research Progress Reports

Research Highlights Sorted by Contributor

A
Ackerman, T. P., University of Washington
Progress in Understanding Water Vapor's Role in Models
Quantifying the Magnitude of Anomalous Solar Absorption
Shortwave Absorption in Tropical Clouds
The k-Distribution Method for a SW Radiative Transfer Model
Alexandrov, M. D., Columbia University
Characterization of Atmospheric Aerosols Using MFRSR Measurements
Optical Depth Measurements by Shadowband Radiometers and Their Uncertainties
Andrews, E., NOAA/CMDL
ARM Program Surface Measurements for Aerosol Profiles Shown to Represent Integrated Column Measurements

B
Baer, F., University Of Maryland
Intercomparison of Longwave Radiative Heating Algorithms
Barnard, J. C., Pacific Northwest National Laboratory
A Simple Algorithm to Find Cloud Optical Depth Applied to Thin Ice Clouds
For Estimates of Cloud Optical Thickness, Simple Equation is Good Enough
Batstone, C., NOAA-CIRES Climate Diagnostics Center
Measuring Climate Model Skill in Producing Present-Day Clouds
Benson, S., University of Utah
Impact of Dynamics and Atmospheric State on Cloud Vertical Overlap
Berg, L., Pacific Northwest National Laboratory
Five-Year Statistics of Shallow Clouds at the ACRF SGP Site
Boyle, J., Lawrence Livermore National Laboratory
Weather Forecasting in the Tropics with Climate Models is Feasible
Bretherton, C. S., University of Washington
A Deeper Look into Shallow Boundary Layer Clouds

C
Cady-Pereira, K. E., Atmospheric and Environmental Research, Inc.
Improved Daytime Precipitable Water Vapor from Vaisala Radiosonde Humidity Sensors
Chuang, C., Lawrence Livermore National Laboratory
Influence of Dust Composition on Cloud Droplet Formation
Preview of TWP MFRSR data
Cialella, A. T., Brookhaven National Laboratory
Surface Characterization Data for the ARM SGP CART Site
Clothiaux, E. E., The Pennsylvania State University
Impact of Dynamics and Atmospheric State on Cloud Vertical Overlap
Clough, S. A., Atmospheric and Environmental Research
Improved Daytime Precipitable Water Vapor from Vaisala Radiosonde Humidity Sensors
Cole, J. N., University of British Columbia
Small Processes Make A Big Difference in Model Outcomes
Comstock, J. M., Pacific Northwest National Laboratory
A Simple Algorithm to Find Cloud Optical Depth Applied to Thin Ice Clouds
ARM Observations Validate Climate Model for Tropical Cirrus Clouds
Continuous Dataset of Water Vapor Measurements Throws Water on Assumptions of Cirrus Cloud Formation
On Thin Ice: Retrieval Algorithms for Ice Clouds Examined for Improvements

D
Daum, P., Brookhaven National Laboratory
Anthropogenic Aerosols: A Clearer Understanding
Davis, A. B., Los Alamos National Laboratory
Forcing Boundary Layer Cloud Systems with Multi-Dimensional Radiation
Wide Angle Imaging Lidar: Active Optical Sensor Technology for Ground-Based Probing of Dense Clouds
Del Genio, A. D., NASA Goddard Institute for Space Studies
Cloud Regimes in the TWP and Their Evolution Over the MJO
Impact of Dynamics and Atmospheric State on Cloud Vertical Overlap
Dong, X., University of North Dakota
A Climatology of Midlatitude Continental Cloud Properties and Their Impact on the Surface Radiation Budget
Minimal Shortwave Anomalous Absorption Found Over ACRF Sites
Observational Evidence of Changes in Water Vapor, Clouds, and Radiation
Validation of CERES-MODIS Cloud Properties Using ARM Data
Dupont, J., Laboratoire de Météorologie Dynamique (LMD), IPSL
How Much Condensed Water Does it Take to Make "Cloud?"

E
Ellingson, R. G., Florida State University
Forcing Boundary Layer Cloud Systems with Multi-Dimensional Radiation
Evans, F., University of Colorado
Forcing Boundary Layer Cloud Systems with Multi-Dimensional Radiation

F
Feingold, G., NOAA/Earth System Research Laboratory
The Surprisingly Large Contribution of Small Marine Clouds to Cloud Fraction and Reflectance
Ferrare, R. A., NASA Langley Research Center
Raman Lidar Observations of Aerosol Humidification Near Clouds
Freer, M., University of Illinois
A Simple Algorithm to Find Cloud Optical Depth Applied to Thin Ice Clouds
Fridlind, A. M., NASA Goddard Institute for Space Studies
Encountering a Longstanding Cloud Physics Question in the Arctic: How is Ice Formed in Moderately Supercooled Clouds?
Fu, Q., University of Washington
Modeling of Scattering and Absorption by Nonspherical Cirrus

G
Ghan, S. J., Pacific Northwest National Laboratory
A "Little" Respect: Droplet Nucleation Finally Included in Global Climate Model
Evaluation of Simulated Clouds and Radiation at the ARM Site
Improved Simulation of Boundary Layer Clouds
Gleckler, P. J., Lawrence Livermore National Laboratory
Measuring Climate Model Skill in Producing Present-Day Clouds

H
Haeffelin, M. P., Institut Pierre Simon Laplace
How Much Condensed Water Does it Take to Make "Cloud?"
Hofmann, R. P., University of Colorado and NOAA/ESRL/PSD
Measuring Climate Model Skill in Producing Present-Day Clouds

I
Ivanova, D., Embry-Riddle Aeronautical University
Impact of Small Ice Crystals on Ice Sedimentation Rates in Cirrus Clouds and GCM Simulations

J
Jakob, C., BMRC
ARM Sites Enable Assessment of Cluster Analysis for Identifying Cloud Regimes
Probabilistic Approach Useful for Evaluating Cloud System Models
Jensen, M., Brookhaven National Laboratory
Environmental Thermodynamics Affect Radiative Impact of Deep Convective Cloud Systems

K
Kassianov, E., Pacific Northwest National Laboratory
A Simple Algorithm to Find Cloud Optical Depth Applied to Thin Ice Clouds
Atmospheric Aerosol Measurements on Cloudy Days: A New Method
Five-Year Statistics of Shallow Clouds at the ACRF SGP Site
Kiehl, J., National Center for Atmospheric Research
Modeling Cloud Forcing in the Tropical West Pacific
Klein, S., Lawrence Livermore National Laboratory
Evaluate the Diurnal Cycle in the Multiscale Modeling Framework using Satellite and ARM Data
Weather Forecasts Help to Understand Climate Model Biases
Kogan, Y., University of Oklahoma, CIMMS
A Bulk Parameterization of Giant Cloud Condensation Nuclei
Forcing Boundary Layer Cloud Systems with Multi-Dimensional Radiation
Using Doppler Radar to Characterize Cloud Parameters
Kollias, P., McGill University
Cloud Observations at Niamey During the AMF Deployment
Impact of Dynamics and Atmospheric State on Cloud Vertical Overlap
Koren, I., Department of Environmental Sciences, Weizmann Institute
The Surprisingly Large Contribution of Small Marine Clouds to Cloud Fraction and Reflectance

L
Lacis, A. A., NASA/Goddard Institute for Space Studies
Effects of Relative Humidity on Aerosols—Implications for Climate
Lamb, P. J., The University of Oklahoma
Bell-Shaped Curve Captures Cloud System Variability
Broadband Albedo Observations in the Southern Great Plains
Lee, S., University of Michigan at Ann Arbor
Aerosol Effects on Liquid-Water Path of Thin Stratocumulus Clouds
Li, Z., University of Maryland
A Consistency Analysis of ARESE Aircraft Measurements
Development of a New Method for Estimating Evapotranspiration Using ARM Measurements
Study Aerosol Humidity Effects Using the ARM Measurements
Liljegren, J. C., Argonne National Laboratory
A Comparison of Integrated Water Vapor Sensors: WVIOP-96
Evaluation of Microwave Radiometer Performance in Alaska
Integrated Water Vapor and Cloud Liquid Water at MCTEX
Liou, K., UCLA
New Method for Three-Dimensional Imaging of Cirrus Clouds
Liu, X., Pacific Northwest National Laboratory
Evaluation of a New Mixed-Phase Cloud Microphysics Parameterization with SCAM, CAPT Forecasts and M-PACE Observations
Liu, Y., Brookhaven National Laboratory
General Formulation for Representing Cloud-to-Rain Transition in Atmospheric Models
Theoretical Formulation for Cloud-to-Rain Transition
Threshold Radar Reflectivity Separating Precipitating from Non-Precipitating Clouds
Liu, Z., University of Washington
Shortwave Absorption in Tropical Clouds
Long, C. N., Pacific Northwest National Laboratory
A Simple Algorithm to Find Cloud Optical Depth Applied to Thin Ice Clouds
ARM QCRad Goes Global
Earth Lightens Up
How Much Condensed Water Does it Take to Make "Cloud?"
Modification of the Atmospheric Boundary Layer by a Small Island: Observations from Nauru
Retrieving Cloud Characteristics from Ground-Based Daytime Color All-Sky Images
Lovejoy, S., McGill University
Multifractal Analysis of Radiation in Clouds: 5000km to 50cm
Lubin, D., National Science Foundation
Aerosols Help Clouds Warm Up Arctic

M
Mace, G., University of Utah
Impact of Dynamics and Atmospheric State on Cloud Vertical Overlap
The Vertical Structure of Cloud Radiative Forcing at the ACRF SGP Revealed by 8 Years of Continuous Measurements
Marshak, A., NASA Goddard Space Flight Center
A Simple Stochastic Model for Generating Broken Cloud Optical Depth and Cloud Top Height Fields
New Technique Successful for Measuring Thickness of Broken Clouds
The Apparent Bluing of Aerosols Near Clouds
Using Lidars to Retrieve Optical Depth of Thick Clouds
Marty, C., Swiss Federal Institute of Snow and Avalanche Research
Downward Longwave Irradiance Uncertainty Under Arctic Atmospheres: Measurements and Modeling
Mather, J. H., Pacific Northwest National Laboratory
Shortwave Absorption in Tropical Clouds
May, P. T., Bureau or Meteorology
Assessment of CloudSat Using ARM, AMF, and CloudNet Observations
McComiskey, A. C., CIRES / NOAA
Direct Aerosol Forcing: Calculation from Observables and Sensitivities to Inputs
Quantifying Error in the Radiative Forcing of the First Aerosol Indirect Effect
McFarlane, S. A., Pacific Northwest National Laboratory
A Simple Algorithm to Find Cloud Optical Depth Applied to Thin Ice Clouds
Data from Saharan Dust Storm Reveal Model Deficiencies
Island-Induced Cloud Plumes Influence Tropical Atmospheric Measurements, Surface Radiation
Shallow Clouds Make the Case for Remote Sensing Instrumentation
Shortwave Absorption in Tropical Clouds
Sub-Grid Scale Cloud Variability Affects Vertical Structure of Clouds and Radiative Heating
McFarquhar, G., University of Illinois
A Simple Algorithm to Find Cloud Optical Depth Applied to Thin Ice Clouds
Characterizing the Co-Existence of Water and Ice in Arctic Clouds
Impact of Small Ice Crystals on Ice Sedimentation Rates in Cirrus Clouds and GCM Simulations
Importance of Small Ice Crystals to Cirrus Properties: Observations from TWP-ICE
Observations of Microphysical Properties of Single Layer Stratocumulus During the Mixed-Phase Arctic Cloud Experiment
Simulating Mixed-Phase Clouds: Sensitivity to Ice Initiation
Single-Scattering Properties of Aggregates of Bullet Rosettes in Cirrus
Tropical Ice Cloud Simulations using Scripps Single Column Model (SCM) Reveal Range of Model Uncertainties
Mechem, D. B., University of Kansas
Forcing Boundary Layer Cloud Systems with Multi-Dimensional Radiation
Menon, S., Lawrence Berkeley National Laboratory
Simulating Mixed-Phase Clouds: Sensitivity to Ice Initiation
Michalsky, J. J., DOC/NOAA/OAR/ESRL
A Proposed Measurement Standard for Diffuse Radiation Flux
Min, Q., State University of New York at Albany
Mean and Variance Measurements of Photon Path Length in Oxygen A-Band and Water Vapor Band Provide Insight into Radiative Transfer in Cloudy Conditions
Mineral Dust Altering Cloud Microphysics and Precipitation
Minnis, P., NASA Langley Research Center
ARM Measurements Validate New Satellite Multilayer Cloud Remote Sensing Method
Minimal Shortwave Anomalous Absorption Found Over ACRF Sites
Mitchell, D. L., Desert Research Institute
Impact of Small Ice Crystals on Ice Sedimentation Rates in Cirrus Clouds and GCM Simulations
Testing and Comparing the Modified Anomalous Diffraction Approximation
Mlawer, E. J., Atmospheric & Environmental Research, Inc.
Improved Daytime Precipitable Water Vapor from Vaisala Radiosonde Humidity Sensors
Morcrette, J. J., European Centre for Medium-Range Weather Forecasts
ARM-Funded Algorithms Lead to Marked Improvements in Global Weather Forecast Model

N
Naud, C. M., Columbia University/GISS
Impact of Dynamics and Atmospheric State on Cloud Vertical Overlap
Nousiainen, T. P., University of Helsinki
Impact of Small Ice Crystals on Ice Sedimentation Rates in Cirrus Clouds and GCM Simulations

O
O'Connor, E. J., University of Reading
Assessment of CloudSat Using ARM, AMF, and CloudNet Observations
Oreopoulos, L., UMBC
Cloud Susceptibility Measures Potential Cloud Sensitivity to First Aerosol Indirect Effect
The Surprisingly Large Contribution of Small Marine Clouds to Cloud Fraction and Reflectance
Ovtchinnikov, M., Pacific Northwest National Laboratory
Atmospheric Aerosol Measurements on Cloudy Days: A New Method
Forcing Boundary Layer Cloud Systems with Multi-Dimensional Radiation

P
Pawlak, D. T., The Pennsylvania State University
Splitting the Solar Spectrum: Sometimes Less is Better Than More
Penner, J. E., University of Michigan
Aerosol Effects on Liquid-Water Path of Thin Stratocumulus Clouds
Climate Warming Due to Soot and Smoke? Maybe Not.
Initial Aerosol Concentration is Key Contributor to Low-Level Cloud Reflectivity
Pincus, R., NOAA-CIRES Climate Diagnostics Center
An Affordable, Flexible, and More Accurate Method for Computing Radiative Transfer
Measuring Climate Model Skill in Producing Present-Day Clouds
Out with the Old, In with the New: McICA to Replace Traditional Cloud Overlap Assumptions
Platnick, S., NASA GSFC
Cloud Susceptibility Measures Potential Cloud Sensitivity to First Aerosol Indirect Effect
Prenni, A. J., Colorado State University
Can Ice-Nucleating Aerosols Affect Arctic Seasonal Climate?
Protat, A., Bureau of Meteorology
Assessment of CloudSat Using ARM, AMF, and CloudNet Observations

R
Randall, D. A., Colorado State University
Tests of Single-Column Models with ARM Data
Rasch, P., National Center for Atmospheric Research
Impact of Small Ice Crystals on Ice Sedimentation Rates in Cirrus Clouds and GCM Simulations
Remer, L., Laboratory for Atmospheres, NASA-GSFC
The Surprisingly Large Contribution of Small Marine Clouds to Cloud Fraction and Reflectance
Revercomb, H. E., University of Wisconsin-Madison
AERI Instrument Status and Analysis Results: 1998
AERI-ER at the SHEBA Ice Station: Far Infrared H2O Continuum
ARM Program Achieves Milestone in Global Cloud Properties Research
Robock, A., Rutgers University
Data from DOE Atmospheric Radiation Measurement Program Allows Evaluation of Surface Models
Rotstayn, L., CSIRO
Hemispherical Simulations Show Impact of Aerosols on Cloud Reflectivity

S
Sassen, K., University of Alaska Fairbanks
Dust in the Wind... and the Clouds... and the Atmosphere
Schmid, B., Pacific Northwest National Laboratory
Arctic Aerosol Study Flies By
Schwartz, S. E., Brookhaven National Laboratory
Modeled vs. Measured Direct-Normal Solar Irradiance
Sednev, I., Lawrence Berkeley National Laboratory
Simulating Mixed-Phase Clouds: Sensitivity to Ice Initiation
Shephard, M. W., Atmospheric and Environmental Research, Inc.
Improved Daytime Precipitable Water Vapor from Vaisala Radiosonde Humidity Sensors
Sheridan, P., US Department of Commerce/NOAA
Aerosol Experiment Results Featured in Technical Journal
Shupe, M., CIRES/NOAA/ETL
Characterizing Mixed-Phase Clouds from the Ground: A Status Report
Classifying Cloud Phase
Mixed-Phase Cloud Vertical Velocities and Dynamical-Microphysical Interactions
Smith, W. L., NASA Langley Research Center
ARM Science Applications of AERI Measurements
ARM Science Applications of AERI Measurements: 1997 Progress
Soden, B. J., University of Miami
"Radiance Assimilation" Correction Method Improves Water Vapor Radiosonde Observations in the Upper Troposphere
Somerville, R. C., Scripps Institution of Oceanography
Single-Column Modeling, GCM Parameterizations and ARM Data
The Icy Business of Calculating Cirrus Clouds
Validating Single Column Models with ARM Data
Spinhirne, J., NASA/Goddard Space Flight Center
Cloud Boundary Detection and Analysis from Micro Pulse Lidar
Optical Properties of the 1997 TWP Smoke Event
Stephens, G. L., Colorado State University
Cloud-Radiation Effects on Sea Ice Loss
Self-Regulation Strikes a Balance Between Hydrological Cycle, Radiation Processes, and Intraseasonal Dynamic Variations
The Significance of Multilayer Cloud Systems in Tropical Convection

T
Tao, W., NASA/Goddard Space Flight Center
Using a Cloud-Resolving Model to Identify the Role of Aerosols on Clouds and Precipitation
Using ARM Cloud Data to Evaluate the Effect of a Land Surface on Clouds
Taylor, K. E., Lawrence Livermore National Laboratory
Measuring Climate Model Skill in Producing Present-Day Clouds
Turner, D. D., University of Wisconsin-Madison
"Roobik" is Part of the Answer, Not a Puzzle
A Surprising Problem with Thin Liquid Water Clouds
ARM Program Research Improves Longwave Radiative Transfer Models
Cloud Phase Determination Using Ground-Based AERI Observations at SHEBA
Correction Method for Infrared Detector Confirmed; Error in Clear Sky Bias Condition Remains Unresolved
Improved Accuracy in Liquid Water Path Retrievals
Improved Daytime Precipitable Water Vapor from Vaisala Radiosonde Humidity Sensors
Paper on Clouds with Small Amount of Liquid Water Amount Ranked as "Hot"
Quantifying the Optical Depth of Mixed-Phase Clouds Accurately with Passive Observations

U
Um, J., University of Illinois
Single-Scattering Properties of Aggregates of Bullet Rosettes in Cirrus

W
Walsh, J. E., University of Illinois
Use of ARM Products in Reanalysis Applications and IPCC Model Assessment
Westwater, E. R., University of Colorado/CET/ECE
Comparisons Between Radiosondes and Remote Sensors During the 2004 NSA Arctic Winter Radiometric Experiment
Tropical Radiosonde Comparisons May Improve Past and Present Humidity Data
Wiscombe, W. J., Brookhaven National Laboratory
Biases in Column Absorption for Fractal Clouds
Cloud Tomography: A Novel Method for Determining 3D Cloud Liquid Water Distribution

X
Xie, S., Lawrence Livermore National Laboratory
An Assessment of the ECMWF Model Over the Arctic Land Using Observations From the Mixed-Phase Arctic Cloud Experiment
ARM M-PACE Data Used to Evaluate and Improve Arctic Mixed-Phase Clouds Simulated in Climate Models
Precipitation Forecast Improved with a New Convective Triggering Mechanism
Seasonal Case Studies Reveal Significant Variance in Large-Scale Forcing Data
Weather Prediction and Climate Simulation: A Meeting of the Models
Xu, K., NASA Langley Research Center
Cloud Ensemble Simulation with the ARM IOP Data

Z
Zhang, G. J., University of California, San Diego
Improving Convection Parameterization Using ARM Observations and NCAR Community Atmosphere Model
Tackling Tropical Convection in Climate Models
Zhang, M., State University of New York at Stony Brook
Precipitation Forecast Improved with a New Convective Triggering Mechanism
Zhang, Y., Lawrence Livermore National Laboratory
Evaluate the Diurnal Cycle in the Multiscale Modeling Framework using Satellite and ARM Data