The Microwave Radiometer Retrievals value-added product (MWRRET VAP) is now available for the 2021–2023 Surface Atmosphere Integrated Field Laboratory (SAIL) campaign near Crested Butte, Colorado.
MWRRET retrieves column precipitable water vapor and liquid water path—both important variables to understanding radiative transfer in the atmosphere and clouds—from ARM’s 2-channel microwave radiometers (23.8 and 31.4 GHz). The VAP uses a physical retrieval methodology that provides improved retrievals over the standard statistical coefficient method.
The SAIL MWRRET data are available as .c2-level files. During c2 processing, improved offsets are applied to the 23.8 GHz channel, improving the precipitable water vapor retrievals. In addition, this stage uses cloud vertical extent information from the Active Remote Sensing of CLouds (ARSCL) VAP rather than ceilometer data to get the correct temperature of the liquid water layers in the atmosphere.
More information about MWRRET can be found on the VAP web page.
Access the SAIL data now in the ARM Data Center. (To download the data, first request an account.)
Feedback on the VAP can be sent to ARM translator Damao Zhang.
To cite the MWRRET data, please use doi:10.5439/1027369.
# # #ARM is a DOE Office of Science user facility operated by nine DOE national laboratories.