-
ARM Best Estimate Data Sets Updated for 2 ARM Observatories
The plots show ARMBEATM relative humidity (top) and surface precipitation (bottom) from May to October 2020 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. The ARM Best…
-
New Micropulse Lidar Cloud Mask Machine Learning VAP Released
This sample MPLCMASKML plot from the Southern Great Plains atmospheric observatory shows the log of the normalized relative backscatter (log10 NRB), linear depolarization ratio (LDR), and cloud masks from the MPLCMASKML and MPLCMASK value-added products for December 24, 2017. The strength of the machine learning approach is apparent on this day when moderate aerosol loading…
-
Aerosol Optical Depth Product Generates New Data
The colors represent aerosol optical depths measured at five different wavelengths with the multifilter rotating shadowband radiometer on June 19, 2019, at Oliktok Point, Alaska. New data are now available from the Aerosol Optical Depth value-added product derived from multifilter rotating shadowband radiometer measurements (AOD-MFRSR VAP). AOD is the measure of the total aerosol burden…
-
REVISED: Additional Ka-Band ARM Zenith Radar Product Releases Now Available
Editor’s note (September 1, 2021): Ka-Band ARM Zenith Radar Active Remote Sensing of CLouds (KAZRARSCL) data from January through June 2021 are now available for the Southern Great Plains and North Slope of Alaska atmospheric observatories. The data announcement below was originally published June 28, 2021. These plots illustrate the KAZRARSCL product for a sample…
-
Updated Surface Spectral Albedo Data Released
This example quicklook from the SURFSPECALB value-added product shows the estimated spectral albedo for the 10- and 25-meter towers at ARM’s Southern Great Plains atmospheric observatory on June 2, 2016. On that date, the surface type for both towers was all vegetation. Updated data from the Surface Spectral Albedo value-added product (SURFSPECALB VAP) are available…
-
Micropulse Lidar Cloud Mask VAP Data Revised for High-Latitude Sites
Data reprocessed with a revised version of the Micropulse Lidar Cloud Mask value-added product (MPLCMASK VAP) are now available for four high-latitude sites. This reprocessing also includes periods of data previously listed as missing. The durations of missing data varied from several minutes to several hours and occurred periodically during the winter months. Affected fields…
-
Explosive Origins of ‘Secondary’ Ice—and Snow
Definitive, real-world evidence for “freezing fragmentation” of drizzle as a major source of ice in slightly supercooled clouds has important implications for forecasting weather and climate Data from ARM’s North Slope of Alaska atmospheric observatory indicate that shattering drizzle droplets play a major role in the formation of “secondary” ice in mixed-phase clouds. The results…
-
BAMS: Two More Hits for ARM Data
Improving earth system models is at the heart of a pair of new studies Data from ARM’s Southern Great Plains atmospheric observatory, above, informed some of a metrics and diagnostics package of earth system models outlined in a July 2020 paper. Hot streaks? Not only athletes have them. Institutions do too. A pair of recent…
-
Scanning ARM Cloud Radar-Velocity Azimuth Display Product Released to Production
Horizontal wind speed and direction at cloud level, from SACR-ADV-VAD, are shown for the first seven days of August 2012 at ARM’s Southern Great Plains Central Facility. The Scanning ARM Cloud Radar-Advanced-Velocity Azimuth Display (SACR-ADV-VAD) value-added product, which provides profiles of horizontal wind estimates at cloud level, has moved to production. SACR-ADV-VAD uses radial mean…
-
Extended ARM Best Estimate Data Sets Available for North Slope of Alaska
The images show ARMBEATM 2-meter temperature (left, unit: K) and 10-meter zonal wind (right, unit: m/s) for ARM’s North Slope of Alaska (NSA) atmospheric observatory in 2017. 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…