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Advances in Atmospheric Sciences 2006年第1期23卷 149-155页

作者：简茂球乔云亭袁卓建罗会邦 Research Center for Monsoon and Environment/Department of Atmospheric Sciences Sun Yat-sen (Zhongshan) UniversityGuangzhou 510275

The variability of the summer rainfall over China is analyzed using the EOF procedure with a new parameter （namely, mode station variance percentage） based on 1951-2000 summer rainfall data from 160 stations in China. Compared with mode variance friction, the mode station variance percentage not only reveals more localized characteristics of the variability of the summer rainfall, but also helps to distinguish the regions with a high degree of dominant EOF modes representing the analyzed observational variable. The atmospheric circulation diagnostic studies with the NCEP/NCAR reanalysis daily data from 1966 to 2000 show that in summer, abundant （scarce） rainfall in the belt-area from the upper-middle reaches of the Yangtze River northeastward to the Huaihe River basin is linked to strong （weak） heat sources over the eastern Tibetan Plateau, while the abundant （scarce） rainfall in the area to the south of the middle-lower reaches of the Yangtze River is closely linked to the weak （strong） heat sources over the tropical western pacific.

关键词： heat sources eastern Tibetan Plateau tropical western pacific summer rainfall Yangtze River basin

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The increased storage of suspended particulate matter in the upper water of the tropical western pacific during the 2015/2016 super El Nino event

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Journal of Oceanology and Limnology 2021年第5期39卷 1675-1689页

作者： Wei GAO Zhenyan WANG Xuegang LI Haijun HUANG CAS Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Mineral Resources Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China

The climate variability induced by the El Nino-Southern Oscillation(ENSO)cycle drives significant changes in the physical state of the tropical western pacific,which has important impacts on the upper ocean carbon cycle.During 2015-2016,a super El Nino event occurred in the equatorial pacific.Suspended particulate matter(SPM)data and related environmental observations in the tropical western pacific were obtained during two cruses in Dec.2014 and 2015,which coincided with the early and peak stages of this super El Nino event.Compared with the marine environments in the tropical western pacific in Dec.2014,an obviously enhanced upwelling occurred in the Mindanao Dome region;the nitrate concentration in the euphotic zone almo st tripled;and the size,mass concentration,and volume concentration of SPM obviously increased in Dec.2015.The enhanced upwelling in the Mindanao Dome region carried cold but eutrophic water upward from the deep ocean to shallow depths,even into the euphotic zone,which disrupted the previously N-limited conditions and induced a remarkable increase in phytoplankton blooms in the euphotic zone.The se results reveal the mechanism of how nutrient-limited ecosystems in the tropical western pacific respond to super El Nino events.In the context of the ENSO cycle,if predicted changes in biogenic particles occur,the proportion of carbon storage in the tropical western pacific is estimated to be increased by more than 52%,ultimately affecting the regional and possibly even global carbon cycle.This paper highlights the prospect for long-term prediction of the impact of a super El Nino event on the global carbon cycle and has profound implications for understanding El Nino events.

关键词： suspended particulate matter field observations tropical western pacific 2015/2016 super E1 Nino event ocean carbon cycle

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COMPARISON OF THE EFFECTS OF ANOMALOUS CONVECTIVE ACTIVITIES IN THE tropical western pacific ON TWO PERSISTENT HEAVY RAIN EVENTS IN SOUTH CHINA

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Journal of tropical Meteorology 2008年第1期14卷 28-32页

作者：鲍名 Beijing 100080 China Center for Monsoon System Research IAP CAS

The different effects of anomalous convective activities in the tropical western pacific on two persistent heavy rain events in South China in 2005 and 2006 have been compared in this study. The data used consist of NOAA Outgoing Longwave Radiation (OLR) data, the NCEP-NCAR reanalysis and precipitation from meteorological stations in South China. Results show that the persistent heavy rain in 2005 was related to the 10-25-day westward propagation of convective activities in the tropical western pacific from about 150 °E. The physical mechanism is interpreted as a Gill-type response of subtropical anticyclone westward extension during weak convective activities period over the Philippine Sea. Our researches also show that the persistent heavy rain in 2006 has longer period than that in 2005, and the subtropical anticyclone persists westward in the earlier summer which is possibly related to the lasting anomalous strong convective motion in the southern branch of Intertropical Convergence Zone (ITCZ) in the tropic western pacific. The anomalous convective activities affect the local Hadley circulation over the western pacific with anomalous ascending motion south of the equator and anomalous descend motion north of it, in favor of the westward extension of the subtropical anticyclone for a long time. Comparison between the two persistent heavy rain events indicates different physical effects of convective activities in the tropical western pacific, though both effects are helpful to the subtropical anticyclone westward extension as a common character of large-scale circulation backgrounds for persistent heavy rain events in South China.

关键词： annually first rainy season in South China persistent heavy rain convective activities tropical western pacific physical effects

Spring Indian Ocean–western pacific SST Contrast and the East Asian Summer Rainfall Anomaly

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Advances in Atmospheric Sciences 2013年第6期30卷 1560-1568页

作者：曹杰陆日宇胡金明王海 Department of Atmospheric Science Yunnan University Yunnan Key Laboratory of International Rivers and Transboundary Eco-security Yunnan University State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Asian International Rivers Center Yunnan University

studying the relationship between SST in the tropical Indian Ocean （TIO）, tropical western pacific （TWP）, and tropical eastern pacific （TEP） and East Asian summer rainfall （EASR）, using data provided by NOAA/OAR/ESRL PSD and the National Climate Center of China for the period 1979-2008, an index, SSTDI, was defined to describe the SST difference between the TIO and TWP. In comparison with the winter ENSO, the spring SST contrast between the TIO and TWP was found to be more significantly associated with summer rainfall in East Asia, especially along the EASR band and in Northeast China. This spring SST contrast can persist into summer, resulting in a more significant meridional teleconnection pattern of lower-tropospheric circulation anomalies over the western North pacific and East Asia. These circulation anomalies are dynamically consistent with the summer rainfall anomaly along the EASR band. When the SSTDI is higher （lower） than normal, the EASR over the Yangtze River valley, Korea, and central and southern Japan is heavier （less） than normal. The present results suggest that this spring SST contrast can be used as a new and better predictor of EASR anomalies.

关键词： sea surface temperature contrast tropical Indian Ocean tropical western pacific East Asiansummer rainfall anomaly predictor

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