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Aerosol Optical Depth Best Estimate Production Data Available for 2 ARM Sites
These time series of the combined aerosol optical depths (AODs) from 2016 to 2020 at ARM’s Eastern North Atlantic atmospheric observatory do not show seasonal patterns. Gaps in the time series are associated with data quality issues or instrument repair or replacement. Image is courtesy of Gabriel Gibler, Pacific Northwest National Laboratory. Aerosol Optical Depth…
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Surface Spectral Albedo Product Updated
This example quicklook from the SURFSPECALB value-added product shows the estimated spectral albedo for each of the seven multifilter radiometer channels for the 10-meter tower at ARM’s Southern Great Plains atmospheric observatory on May 1, 2023. In fiscal year 2021, the Atmospheric Radiation Measurement (ARM) user facility added a seventh channel to its multifilter rotating shadowband…
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Evaluate Aerosol Optical Depth Best Estimate Data Product
These time series of combined aerosol optical depths (AODs) from the AODBE 5-channel product exhibit seasonal patterns with large and small AOD values during summer and winter, respectively, at ARM’s Southern Great Plains atmospheric observatory. The time series have gaps, which are likely associated with data quality issues and required upgrades and replacements of ground-based…
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ARM Finishes Radiometer Upgrades; Related Data Product Updates Underway
Measurements from the multifilter rotating shadowband radiometer (MFRSR), seen here at ARM’s Eastern North Atlantic atmospheric observatory, allow users to infer the atmosphere’s aerosol optical depth at each wavelength. ARM is updating data products to accommodate the addition of a new channel to its MFRSRs. In fiscal year 2021, the Atmospheric Radiation Measurement (ARM) user…
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New Journal Article Highlights ARM Aerosol Data Set
Value-added product leverages long-term Southern Great Plains data The Quality Control Aerosol Optical Depth (QCAOD) value-added product combines individual aerosol optical depth records provided by the Cimel sunphotometer (left), multifilter rotating shadowband radiometers (middle), and normal incidence multifilter radiometer (right). A March 2021 article in the journal Scientific Data presents two decades of aerosol data…
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Aerosol Optical Depth Measurements Available as Value-Added Product
These two images show data plots of cloud-screened AOD at the AMF site in China collected on a 20-second interval during daylight hours. These two days show drastically different aerosol optical depths.Aerosol optical depth (AOD) is a measure of the total aerosol burden in the atmosphere. The spectral dependence of AOD, typically described by the…
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Aerosol Optical Depth Measurements Available as Value-Added Product
Cloud-screened AOD at five wavelengths (top) and Angstrom exponent (bottom) over a three-month time period at the Black Forest, Germany deployment. Aerosol optical depth (AOD) measures total aerosol burden in the atmosphere. The spectral dependence of AOD, typically described by the Angstrom exponent, is also an indicator of particle size. Small Angstrom exponent values (near…