Passive Microwave Brightness Temperatures as Proxies for Hailstorms
The Tropical Rainfall Measuring Mission (TRMM) satellite has been used to infer distributions of intense thunderstorms. Besides the lightning measurements from TRMM, the radar reflectivities and passive microwave brightness temperatures have been used as proxies for convective vigor. This is based o...
Saved in:
Published in | Journal of applied meteorology and climatology Vol. 48; no. 6; pp. 1281 - 1286 |
---|---|
Main Author | |
Format | Journal Article |
Language | English |
Published |
Boston, MA
American Meteorological Society
01.06.2009
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The Tropical Rainfall Measuring Mission (TRMM) satellite has been used to infer distributions of intense thunderstorms. Besides the lightning measurements from TRMM, the radar reflectivities and passive microwave brightness temperatures have been used as proxies for convective vigor. This is based on large graupel or hail lofted by strong updrafts being the cause of high–radar reflectivity values aloft and extremely low brightness temperatures. This paper seeks to empirically confirm that extremely low brightness temperatures are often accompanied by large hail at the surface. The three frequencies examined (85, 37, and 19GHz) all show an increasing likelihood of hail reports with decreasing brightness temperature. Quantification is limited by the sparsity of hail reports. Hail reports are common when brightness temperatures are below 70 K at 85 GHz, 180 K at 37 GHz, or 230 K at 19 GHz. |
---|---|
Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1558-8424 1558-8432 |
DOI: | 10.1175/2009jamc2125.1 |