Biological and Environmental Research - Earth and Environmental System Sciences
Earth and Environmental System Modeling

The Detection of Mesoscale Convective Systems by the GPM Ku-Band Spaceborne Radar

TitleThe Detection of Mesoscale Convective Systems by the GPM Ku-Band Spaceborne Radar
Publication TypeJournal Article
Year of Publication2019
JournalJournal of the Meteorological Society of Japan. Ser. II
Volume97
Number6
Pages1059-1073
Abstract / Summary

The Global Precipitation Measurement (GPM) core observatory satellite launched in 2014 features more extended latitudinal coverage (65°S-65°N) than its predecessor Tropical Rainfall Measuring Mission (TRMM, 35°S-35°N). The Ku-band radar onboard the GPM is known to be capable of characterizing the 3D structure of deep convection globally. In this study, the GPM's capability for detecting mesoscale convective systems (MCSs) is evaluated. Extreme convective echoes seen by GPM are compared against an MCS database that tracks convective entities over the contiguous US. The tracking is based on a geostationary satellite and ground-based Next Generation Radar (NEXRAD) network data obtained during the 2014-2016 warm seasons. Results indicate that more than 70 % of the GPM-detected deep–wide convective core (DWC) and wide convective core (WCC) objects are part of NEXRAD identified MCSs, indicating that GPM-classified DWCs and WCCs correlate well with typical MCSs containing large convective features. By applying this method to the rest of the world, a global view of MCS distribution is obtained. This work reveals GPM's potential in MCS detection at the global scale, particularly over remote regions without a dense observation network.

URLhttp://dx.doi.org/10.2151/jmsj.2019-058
DOI10.2151/jmsj.2019-058
Journal: Journal of the Meteorological Society of Japan. Ser. II
Year of Publication: 2019
Volume: 97
Number: 6
Pages: 1059-1073
Publication Date: 01/2019

The Global Precipitation Measurement (GPM) core observatory satellite launched in 2014 features more extended latitudinal coverage (65°S-65°N) than its predecessor Tropical Rainfall Measuring Mission (TRMM, 35°S-35°N). The Ku-band radar onboard the GPM is known to be capable of characterizing the 3D structure of deep convection globally. In this study, the GPM's capability for detecting mesoscale convective systems (MCSs) is evaluated. Extreme convective echoes seen by GPM are compared against an MCS database that tracks convective entities over the contiguous US. The tracking is based on a geostationary satellite and ground-based Next Generation Radar (NEXRAD) network data obtained during the 2014-2016 warm seasons. Results indicate that more than 70 % of the GPM-detected deep–wide convective core (DWC) and wide convective core (WCC) objects are part of NEXRAD identified MCSs, indicating that GPM-classified DWCs and WCCs correlate well with typical MCSs containing large convective features. By applying this method to the rest of the world, a global view of MCS distribution is obtained. This work reveals GPM's potential in MCS detection at the global scale, particularly over remote regions without a dense observation network.

DOI: 10.2151/jmsj.2019-058
Citation:
Wang, J, R Houze, Jr., J Fan, S Brodzik, Z Feng, and JC Hardin.  2019.  "The Detection of Mesoscale Convective Systems by the GPM Ku-Band Spaceborne Radar."  Journal of the Meteorological Society of Japan. Ser. II 97(6): 1059-1073.  https://doi.org/10.2151/jmsj.2019-058.