Micropulse Lidar Cloud Mask Value-Added Product Technical Report

Sivaraman, C ; Comstock, J

Pacific Northwest National Laboratory (U.S.)

关键词: Clouds;    Remote Sensing;    Depolarization;    54 Environmental Sciences;    Optical Radar;   

DOI  :  10.2172/1019283
RP-ID  :  DOE/SC-ARM/TR-098
RP-ID  :  DE-AC05-7601830
RP-ID  :  1019283

美国|英语

来源: UNT Digital Library

【 摘 要 】

Lidar backscattered signal is a useful tool for identifying vertical cloud structure in the atmosphere in optically thin clouds. Cloud boundaries derived from lidar signals are a necessary input for popular ARM data products, such as the Active Remote Sensing of Clouds (ARSCL) product. An operational cloud boundary algorithm (Wang and Sassen 2001) has been implemented for use with the ARM Micropulse Lidar (MPL) systems. In addition to retrieving cloud boundaries above 500 m, the value-added product (VAP) named Micropulse Lidar Cloud Mask (MPLCMASK) applies lidar-specific corrections (i.e., range-square, background, deadtime, and overlap) as described in Campbell et al. (2002) to the measured backscattered lidar. Depolarization ratio is computed using the methodology developed by Flynn et al. (2007) for polarization-capable MPL systems. The cloud boundaries output from MPLCMASK will be the primary lidar cloud mask for input to the ARSCL product and will be applied to all MPL systems, including historical data sets.