Other
Scientific paper
May 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30j..51g&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 10, pp. 51-1, CiteID 1544, DOI 10.1029/2002GL016831
Other
33
Meteorology And Atmospheric Dynamics: Ocean/Atmosphere Interactions (0312, 4504), Information Related To Geographic Region: Indian Ocean, Information Related To Geographic Region: Asia, Meteorology And Atmospheric Dynamics: Climatology (1620), Global Change: Climate Dynamics (3309), Atmospheric Composition And Structure: Air/Sea Constituent Fluxes (3339
Scientific paper
An extremely hot and dry summer of 1994 was reported in East Asian countries. Using observational data, we have demonstrated that the Indian Ocean Dipole (IOD) is at least one possible cause of the abnormal East Asian summer climate. An anomalous cyclonic circulation over the western Pacific and the southern China weakened the monsoonal northward flow in the lower troposphere. An anomalous anticyclonic circulation with the equivalent barotropic structure around Japan, Korea and the northeastern part of China caused the hot and dry summer of 1994. This accumulation of the lower potential vorticity in the Far East is related to the wave activity from the Mediterranean/Sahara region. The monsoon-desert mechanism connects a Rossby wave source with the IOD-induced diabatic heating around the Bay of Bengal. Another Rossby wave-train pattern was generated in the upper troposphere and propagates northeastward from the southern China. Both the Rossby wave patterns influenced the circulation changes over East Asia.
Guan Zhaoyong
Yamagata Toshio
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