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Aerosol Hygroscopicity Kappa Data Product Available for Evaluation
Sample plots from ARM’s Southern Great Plains atmospheric observatory show kappa values within critical diameter-supersaturation field space, top, and a time series of kappa, bottom. A new value-added product (VAP) from the Atmospheric Radiation Measurement (ARM) user facility calculates the hygroscopic properties of measured aerosol particles. Hygroscopicity is the ability of a particle to take…
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Updated ARM Best Estimate Data Available for Southern Great Plains
The plots show ARMBEATM relative humidity, top, and surface precipitation, bottom, from May 31 to August 28, 2018, at ARM’s Southern Great Plains (SGP) atmospheric observatory. The Atmospheric Radiation Measurement (ARM) user facility provides tailored datastreams known as ARM Best Estimate (ARMBE) data products for use in the evaluation of global earth system models. Two…
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ARM Data-Oriented Metrics and Diagnostics Package Updated
New release will be used in E3SM diagnostics package The Atmospheric Radiation Measurement (ARM) user facility provides high-frequency and long-term data sets to help develop and improve earth system models. A data-oriented metrics and diagnostics package called ARM-DIAGS—now in its second version—is designed to further facilitate the use of ground-based ARM measurements in model evaluation. ARM-DIAGS…
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Microwave Radiometer Retrieval Data Available for 3 ARM Campaigns
The Multidisciplinary Drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition used microwave radiometers (2-channel on the left and 3-channel on the right) to measure water vapor and liquid molecules in the atmosphere. The Microwave Radiometer Retrievals (MWRRET) value-added product (VAP) has been released for three recent Atmospheric Radiation Measurement (ARM) user facility field…
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Large-Scale Forcing Data Released for West Antarctic Campaign
The map shows the variational analysis domain (enclosed by the red circle in the left bottom corner) for the ARM West Antarctic Radiation Experiment (AWARE). The domain is centered at 77oS, 168.25oE, near McMurdo Station on Ross Island. Four months of continuous large-scale forcing data are now available for the ARM Mobile Facility deployment at…
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Boon of New Aerosol and Trace Gas Data for ARM Users
Aerosol Observing Systems, such as this one at the Southern Great Plains atmospheric observatory, are ARM’s primary platforms for in situ aerosol measurements at Earth’s surface. Photo is courtesy of Janek Uin, Brookhaven National Laboratory. The Atmospheric Radiation Measurement (ARM) user facility recently released b1-level data products for aerosol size distributions, aerosol chemical composition, and…
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Corrected Aerosol Chemical Speciation Monitor Data Available for Evaluation
This sample plot from ARM’s Southern Great Plains (SGP) atmospheric observatory shows a selection of aerosol mass or volume concentrations and the corresponding mass or volume concentrations corrected for composition-dependent collection efficiency (CDCE). A new value-added product (VAP) from the Atmospheric Radiation Measurement (ARM) user facility corrects aerosol chemical speciation monitor (ACSM) data for non-unity…
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Updated Southern Great Plains Continuous Large-Scale Forcing Data Released
The plots show the time series of the derived large-scale vertical velocity (Omega) in a previous VARANAL version 2 release for July 2018 (top) and in a new release with a bug fixed (middle), and the difference between the two releases (bottom). The bug only affects the time periods after 18 UTC July 21, when…
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Updated: Southern Great Plains Radiation Data Quality VAP Data Reprocessed
Updated February 5, 2021: Reprocessed QCRAD shortwave broadband total downwelling irradiance data are now available for the Southern Great Plains sites E33 (Newkirk, Oklahoma) from August 18, 2011, to July 29, 2016, and E38 (Omega, Oklahoma) from August 23, 2011, to July 19, 2016. Best-estimate c2/s2 data and infrared-corrected c2 data are reprocessed for both…
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Value-Added Product Delivers 3D Cloud Positions Based on Stereo Photographs
The figure presents PCCP VAP data from the Southern Great Plains E45 site (Tonkawa, Oklahoma) on March 24, 2020. The upper panel displays the distribution of the reconstructed cloud points by time and height. The colors represent the count of the detected points in the corresponding bin. The bottom left panel is a picture from…