ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Discussion on the Objective Partitioning Operation of Tropical Cyclone Precipi tation
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Abstract:
For partitioning precipitation of tropical cyclone(TC) in China, an Objective Sy noptic Analysis Technique（OSAT）was used on six TCs affecting China in 2005. Th e results were compared with those results using subjective technique. It showed that some station observations caused by other weather systems or interaction b etween TC and other weather systems were included because the radius D1 of cir culation around maximum TC area was set too big. So the distinguish error is hig h, but missed unlikely. In order to reduce the distinguish error, a method of se tting D1 by realtime observations circulation radius and cloud and so on was proposed. Finallythe distinguish error was reduced, but missed a little more . The new result showed that rain station numbers partitioned by improved objectiv e technique could be less than that of subjective technique because the effect o f interaction between TC and other weather systems (cold front, west wind trough etc.) was not taken into account. Shortly, the accuracy of partition was improv ed after D1 was reset by integration of observation data and cloud image and s o on instead of intensity of TC. The precision of TC precipitation partitioned b y the objective method could be accepted in operation. It could be applied in op eration.
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