Rainfall assessment from meteorological satellite data over the Northern part of Thailand
1994
Prasert Aungsuratana
The result of rainfall asessment over the Northern part of Thailand from meteorological satellite data that is analyzed from the data of GMS-4 satellite during the time of March to May 1993. In order to compare with concerning meteorological data in the same time and space for the consequence of their relations are concluded. During the continuously change weather rainfall producing cloud types are convective band, deep stratiform and convective cell. The relative causalities are as followed: (1) if there are high pressure surrounded, the cloud is almost wide spreaded; (2) if the clouds formulated in the Southwest-Northeast direction, then and there are South wind or West wind encompassing; (3) in case of clear sky imply that there is heat low cover the Northern part of Thailand; (4) convective cell and convective band are always found from 13:00-18:59, on the other hand, deep stratiform is also always found from 0.7:00-12:59; (5) the significant between the cloud and the rainfall revealed that convective cell and convective band which are related to thunderstrom are always found from 13:00-18:59 and 19:00-24:59, deep stratiform which is significant to thunderstrom and shower or slight rain shower is also found from 07:00-12:59; (6) middle cloud and cirrus are also significant to slight rain shower from 01:00-06:59. The relationship between rainfall amount (P) and convective cell cloud top temperature (Tp) is P=135.03 Tp** (-24.8) The relationship between maximum rainfall intensity in 60 mm (Pi) and convective cell cloud top temperature (Tp) is Pi=126.12 Tp** (-23.17) and the relationship between rainfall amount and the average cloud top temperature (Ta) of convective cell is P=145.26 Ta** (-26.69).
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