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Numerical Simulation of The South Asia High and Its Impacts on The Summer Monsoon Precipitation over East Asia

PI: Yongqiang Yu
Institution: LASG,Institute of Atmospheric Physics, CAS, China
Abstract:
Observed results show the South Asia high (SAH) is one lower stratosphere semi-permanent anti-cyclonic circulation over the Northern Hemisphere, and is one of the leading members of the Asia summer monsoon. The varieties of the SAH effect obviously on the atmosphere general circulation and precipitation in the East Asia. By use of the global coupled model, especially by comparing the simulations in various models, it is very interesting and important to study the basic characters of the SAH and its trends on the background of the global warming, and the objects are as the below:
(1) To compare and test the simulation abilities of the basic characters of the SAH in different global couple models, such as the ability about simulation of local, strength, seasonal and inter-annual varieties and so on.
(2) The observed data and the reanalysis data are applied to analyze the relations between the SAH and the summer monsoon precipitation in 20th century, and the same discussion will be done based on the output of the 20th century simulation in CMIP. By comparing the results, the simulation abilities about the trends of the SAH and the summer monsoon precipitation over East Asia in the 20th century will be tested.
(3) Based on analyses above and the outputs of the 20th century simulation in CMIP, the more discusses focus on the trends of the SAH and its possible mechanism on the background of global warming in the future.
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