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Modeling the climate effects of different subregional uplifts within the Himalaya-Tibetan Plateau on Asian summer monsoon evolution

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chinese Science Bulletin 2012年第35期57卷 4617-4626页

作者： zhang ran 1,jiang dabang 1,2,3.liu xiaodong 4 & tian zhiping 2,{3.,chinese academy of sciences,Beijing 10002.,china 2 Nansen-Zhu International research Centre,Institute of Atmospheric Physics,chinese academy of sciences,Beijing 10002.,china 3.Key Laboratory of Regional climate-Environment research for Temperate East Asia,chinese academy of sciences,Beijing 10002.,china 4 State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,chinese academy of sciences,Xi’an 710075,china 5 Graduate University of chinese academy of sciences,Beijing 100049,china climate change research {3. Chinese Academy of Sciences Beijing China Nansen-Zhu International research Centre Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China Key Laboratory of Regional climate-Environment research for Temperate East Asia Chinese Academy of Sciences Beijing China State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi’an China Graduate University of chinese academy of sciences Beijing China

Considering the different uplifting time of different subregions of the Himalaya-Tibetan Plateau(TP),a series of numerical simulations have been conducted with the Community Atmosphere Model(CAM4) developed at the National center for Atmospheric research to explore the effects of the phased tectonic uplift of the Himalaya-TP on the evolution of Asian summer *** results show that the uplifts of the Himalaya and northern TP significantly affect the evolutions of South Asian summer monsoon and northern East Asian summer monsoon *** is,the tectonic uplift of the Himalaya intensifies the South Asian summer monsoon circulation and increases the precipitation in South Asia,whereas the uplift of the northern TP intensifies the northern East Asian summer monsoon circulation and increases the precipitation in northern East *** with previous simulations,current comparative analyses of modeling results for different subregional uplifts within the Himalaya-TP help deepen our understanding of the evolutionary history of Asian monsoons.

关键词：青藏高原隆升喜马拉雅亚洲季风高原气候夏季季风次区域隆起演化建模

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Mid-Pliocene Westerlies from Plio MIP Simulations

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Advances in Atmospheric sciences 2015年第7期32卷 909-923页

作者： LI Xiangyu jiang dabang zhang Zhongshi zhang ran tian zhiping YAN Qing Nansen–Zhu International research Centre Institute of Atmospheric PhysicsChinese Academy of Sciences University of chinese academy of sciences CAS center for Excellence in Tibetan Plateau Earth sciences climate change research {3. Chinese Academy of Sciences Uni research Bjerknes Centre for Climate Research

The midlatitude westerlies are one of the major components of the global atmospheric circulation. They play an important role in midlatitude weather and climate, and are particularly significant in interpreting aeolian sediments. In this study, we analyzed the behavior and the possible mechanism involved in the change of the westerlies, mainly in terms of the jet stream position, in the mid-Pliocene warm period （3.3.to 3.0 million years ago） using simulations of 15 climate models from the Pliocene Model Intercomparison Project （PlioMIP）. Compared to the reference period, the mid-Pliocene midlatitude westerlies generally shifted poleward （approximately 3.6° of latitude in the Northern Hemisphere and 1.9~ of latitude in the Southern Hemisphere at 850 hPa level） with a dipole pattern. The dipole pattern of the tropospheric zonal wind anomalies was closely related to the change of the tropospheric meridional temperature gradient as a result of thermal structure adjustment. The poleward shift of the midlatitude westerly jet corresponded to the poleward shift of the mean meridional circulation. The sea surface temperatures and sea ice may have affected the simulated temperature structure and zonal winds, causing the spread of the westerly anomalies in the mid-Pliocene between the atmosphere-only and coupled atmosphere-ocean general circulation model simulations.

关键词： mid-Pliocene westerly climate model PlioMIP

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