Influences of Typhoon Chanchu on the 2006 South China Sea summer monsoon onset

Details Influences of Typhoon Chanchu on the 2006 South China Sea summer monsoon onset Influences of Typhoon Chanchu on the 2006 South China Sea summer monsoon onset

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3512809m&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 12, CiteID L12809

Physics

1

Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Atmospheric Processes: Tropical Meteorology, Atmospheric Processes: General Circulation (1223), Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504)

Scientific paper

This study reveals some unique features associated with the impact of Typhoon Chanchu on the South China Sea (SCS) summer monsoon (SCSSM) onset in 2006. With Typhoon Chanchu entering the SCS in mid-May, southwesterlies were induced over the SCS and its upstream region due to a thermally forced Rossby wave response, leading to a reversal of low-level winds and a positive meridional temperature gradient (MTG) in the upper troposphere over the SCS. Typhoon Chanchu thus acted as an immediate trigger for the SCSSM onset, and the onset date was suggested to occur in the third pentad of May. After the typhoon landed in the coast of southern China, it still contributed to the establishment of the SCSSM due to warming the air column over the northern SCS, resulting in a persistent positive MTG with the ridge surface tilting northward.

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