Microburst applications of brightness temperature difference between GOES Imager channels 3 and 4

Details Microburst applications of brightness temperature difference between GOES Imager channels 3 and 4 Microburst applications of brightness temperature difference between GOES Imager channels 3 and 4

2010-04-20

arxiv.org/abs/1004.3506v3

Physics

Atmospheric and Oceanic Physics

11 pages, 7 figures; text and graphic revision; 12 pages, 8 figures, manuscript for presentation at 39th Annual Conference on

Scientific paper

This paper presents a new application of brightness temperature difference (BTD) between Geostationary Operational Environmental Satellite (GOES) imager channels 3 and 4. It has been found recently that the BTD between GOES infrared channel 3 (water vapor) and channel 4 (thermal infrared) can highlight regions where severe outflow wind generation (i.e. downbursts, microbursts) is likely due to the channeling of dry mid-tropospheric air into the precipitation core of a deep, moist convective storm. Case studies demonstrating effective operational use of this image product are presented for two significant marine transportation accidents as well as a severe downburst event over the Washington, DC metropolitan area in April 2010.

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