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| 1 | Impacts of thermodynamic processes over the Tibetan Plateau on the Northern Hemispheric climate显示文摘We here report our recent research results on the climatic features of Tibetan thermodynamic functions and their impacts on the regional climates of the Northern Hemisphere. The results show that the thermodynamic processes over the Tibetan Plateau not only strongly influence the Asian monsoon and precipitation, but also modulate the atmospheric circulation and climate over North America and Europe through stimulating the large-scale teleconnections such as the Asian-Pacific oscillation and affect the atmospheric circulation over the southern Indian Ocean. The Tibetan climate may be affected by sea surface temperatures over the tropical Pacific. On the other hand, the Tibetan climate also affects the atmosphere-ocean interactions in the tropics and mid-latitudes of the Pacific by the atmospheric circulation over the North Pacific. In spring and summer, the thermodynamic anomalies on the plateau affect the subtropical high pressure, the Hadley circulation, and the intertropical convergence zone over the Pacific, and then modulate the development of the El Ni-o/Southern Oscillation (ENSO). It is necessary to study the forecasting methods for the development of ENSO from the Tibetan climate anomaly. This result also embodies the essence of interactions among land, atmosphere, and ocean over the Northern Hemisphere. Since the previous studies focused on impacts of the plateau on climates in the Asian monsoon regions, it is essential to pay more attention to studying the roles of the plateau in the Northern Hemispheric and even global climates. | ZHOU XiuJi ZHAO Ping CHEN JunMing CHEN LongXun LI WeiLiang | 2009 | Science China Earth Sciences2009，52，11： | 42 |
| 2 | 青藏高原大气热量源汇年际变化及其与大气环流的关系(英文)显示文摘本文使用1961~1995年逐月青藏高原地区大气机热量源汇资料、1961~1990年青藏高原地区积雪日数和积雪深度资料、美国NCEP/ NCAR的再分析资料以及1975~1994年全球OLR资料,讨论了高原大气热状况年际变化及其与大气环流的关系,发现:高原地区大气热源年际变化明显,其中春季和秋季高原地区的变率最大,并且水平分布很不均匀;当冬季高原冷源弱(或强)时,东亚大槽位置偏东(或西),对应着东亚强(或弱)的冬季风;夏季高原热源强(或弱)的年份,在高原及其邻近地区的对流层中、低层为偏差气旋环流(或反气旋环流),在中国长江流域低层为异常的西南风(或东北风),对应着东亚强(或弱)的夏季风,夏季高原热源强度还与南亚高压的强度和位置有关;春季4月的积雪状况与夏季高原大气热源强度有明显关系;夏季高原热源与同期青藏高原东南部、孟加拉湾、中南半岛、东南亚、中国西南部、长江流域和从黄海到到日本海一带对流有明显正相关。 | 赵平 陈隆勋 Zhao Ping Chen Longxun | 2001 | Advances in Atmospheric Sciences2001，18，1： | 21 |
| 3 | Onset of East Asian subtropical summer monsoon and rainy season in China显示文摘Here we use harmonic analyses to examine seasonal variations of China land rainfall, low-level winds, and atmospheric heating over East Asia during spring to summer and the associated subtropical summer monsoon activities. Our results indicate that the South China spring rainfall (SCSR) in March is the prophase of East Asian sub-tropical summer monsoon (EASSM), and the onset of EASSM and China summer rainy season starts in early April, characterized by the enhanced rainfall in South China and the seasonal reverse of zonal land-sea thermal contrast in sub-tropical East Asia. The EASSM onset is earlier than that of South China Sea summer monsoon, and it is active in east of 100?E and north of 20?N. Our analyses suggest that the subsequent heating appears over India-China Peninsula in March and South China in April and causes the low-level atmospheric warming and the zonal land-sea thermal contrast seasonal reverse in East Asian subtropics. The atmospheric heating over South China is the main force to drive the southwesterly winds, updrafts and strengthen the summer precipitation in South China. | ZHU CongWen ZHOU XiuJi ZHAO Ping CHEN LongXun HE JinHai | 2011 | Science China Earth Sciences2011，54，12： | 14 |
| 4 | Relationship between the atmospheric heat source over Tibetan Plateau and the heat source and general circulation over East Asia显示文摘On the basis of NCEP/NCAR version I daily reanalysis data from 1971 to 2000 and by the methods of inverse calculation,correlation analysis and comparative analysis,the influences of atmospheric heat source(AHS) over the Tibetan Plateau on the large-scale AHS and the general circulation in summer are studied in this paper.The results show that AHS over the plateau in summer may trigger a heat source wavetrain propagating northeastward along the coast from the East Asian continent and West Pacific to Bering Strait-Arctic or even North America.In addition,if AHS over the eastern plateau is intense,South Asian High moves to southeast and West Pacific subtropical high moves to southwest;on the contrary,if AHS over the eastern plateau is weak,South Asian High moves to northwest and West Pacific subtropical high moves to northeast.Therefore,South Asian High and West Pacific sub-tropical high move in the horizontally-opposite directions in terms of interannual variation,for which AHS over the eastern plateau seems to be thermodynamically responsible. | WANG YueNan ZHANG Bo CHEN LongXun HE JinHai LI Wei CHEN Hua | 2008 | Chinese Science Bulletin2008，53，21： | 9 |
| 5 | Zonal propagation of kinetic energy and convection in the South China Sea and Indian monsoon regions in boreal summer显示文摘Zonal propagation of kinetic energy (KE) and convection in the South China Sea (SCS) and Indian summer monsoon areas are examined in present study. Results suggest that the SCS and Indian summer monsoon prevailed regions (5 —15°N) are dominated by the southwesterly wind, however, the disturbances of KE at 850 hPa and convection are observed mainly coming from the western Pacific Ocean (140—150°E), after passing through the SCS, and westward propagated into the Bay of Bengal (90—100°E). In the Indian summer monsoon domain, where the disturbances of KE are found mainly coming from the Arabian Sea (AS) and eastward propagated into the Bay of Bengal. Therefore, the SCS and the Indian summer mon- soon are quite different in zonal propagation of KE and convection. The SCS summer monsoon is mainly affected by the KE and convection coming from the tropical western Pacific. The Indian summer monsoon, however, can be partly influenced by the AS and the SCS summer monsoon. The analysis also suggests that the interaction region between the SCS and the Indian summer monsoon is around 90—95°E, rather than 105°E as proposed by earlier studies. | CHEN Longxun 1 ,GAO Hui 2 ,HE Jinhai 2 ,TAO Shiyan 3 & JIN Zuhui 3 1.Chinese Academy of Meteorological Sciences,Beijing 100081,China 2.Nanjing Institute of Meteorology,Nanjing 210044,China 3.Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China | 2004 | Science China Earth Sciences2004，47，12： | 7 |
| 6 | An East Asian land-sea atmospheric heat source difference index and its relation to general circulation and summer rainfall over China显示文摘Using a monthly precipitation dataset of 160 stations over China and a daily and monthly National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis dataset from 1961 to 2006, we here define an East Asian land-sea atmospheric heat source difference index ILSQD and investigate its relationship to summer rainfall in China and East Asian general circulation. The results show that ILSQD more closely reflects the anomalous variations in summer monsoon phenomena; in the high-index (HI) cases, the strong low-level southerlies over East China and the strong high-level westerlies over middle latitudes indicate an active summer monsoon, and vice versa in the low-index (LI) cases. This index also reflects summer rainfall anomalies over East China; in the HI (LI) cases rainfall increases (decreases) over North China and at the same time decreases (increases) over the mid-lower Yangtze River valley and the southern Yangtze River. Hence, ILSQD can be utilized as a summer monsoon index. There is also remarkable correlation between ILSQD in March and the following summer rainfall over the mid-lower Yangtze River valley. Finally, the Community Atmospheric Model Version 3.1 (CAM3.1) of NCAR is used to run numerical experiments, which verify that the anomalous summer precipitation in simulations is similar to that of diagnosis analysis based on the anomalous summer atmospheric heating forcing. Similarly, the atmospheric heating rate in March can force summer rainfall anomalies in the simulations just as observed in the data. | Zhang Bo Zhou XiuJi Chen LongXun Zhu YanFeng Zhao Bin | 2010 | Science China Earth Sciences2010，53，11： | 6 |
| 7 | CHARACTERISTICS OF SEASONAL VARIATION OF RAINFALL OVER THE TIBETAN PLATEAU DURING SUMMER 1998 AND ITS IMPACT ON EAST ASIAN WEATHER显示文摘The seasonal variation of rainy season over the Tibetan Plateau in summer 1998 is analyzed by using daily observational rainfall data for Lhasa from 1955 to 1996, and rainfall data at 70 stations from January to August of 1998 over the Tibetan Plateau (TP) and adjacent regions, as well as TBB data from May to August of 1998. The onset date of rainy season for Lhasa is climatologically 6 June. Among the analyzed years, the earliest onset date is 6 May, while the latest may delay to 2 July. The obvious inter-decadal variation can be found in the series of onset date. The onset date of summer 1998 over middle TP (onset date of Lhasa) is 24 June, which is relatively later than the normal case.The onset for rainy season of 1998 started over southeast and northeast parts of TP and then propagated westward and northward. The convection over east and west parts of TP shows that there is a quasi 12-15 day oscillation. In June, the convection over middle and lower reaches of Yangtze River is formed by the westward propagation of convection over subtropical western Pacific, while in July, it is formed by the eastward propagation of convection over TP.Besides, it is also found that there exists good negative and obvious advance and lag correlation between the convection over the middle and western TP and that over the subtropical western Pacific and southern China. Therefore it can be inferred that a feedback zonal circulation with a quasi two-three week oscillation exists between the ascending region of TP and descending region of subtropical western Pacific, i.e. the convection over TP may affect the subtropical high over western Pacific and vice versa. | LI Wei(李薇) CHEN Longxun(陈隆勋) | 2001 | Acta meteorologica Sinica2001，15，3： | 6 |
| 8 | Thermal difference between the Tibetan Plateau and the plain east of Plateau and its influence on rainfall over China in the summer显示文摘There exist thermal differences between the Tibetan Plateau (TP) and the plain east of the TP, and between land and sea in East Asia. The influence of the land-sea thermal contrast on the precipitation in East China has been widely investigated; however, a few studies have paid attention to the role of the TP-plain thermal difference. Thus, using the National Center for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis data and the observation data of China from 1951 to 2007, the area-mean temperature difference between the TP (27.5°-40°N, 80°-100°E) and the plain (27.5° -40°N,110°-120°E) at 500 hPa is defined as an index (dexT-C) of the TP-plain thermal difference in East Asia. The relationship between the dexT-C and East Asian general circulation and the rainfall in China in the summer has been explored. Diagnostic analysis and numerical simulation show that the TP-plain thermal difference is closely related to the rainfall over West China (90°-110°E) in the summer. High values of the dexT-C correspond to the large thermal difference between the TP and the plain, strengthening the heat low over the TP, southward of the northwestern Pacific subtropical high, southern flood and northern drought in West China (90°-110°E), and vice versa. From 1951 to 2007, the variation in dexT-C exhibits a remarkable oscillation and ascending trend, and the abnormal rainfall pattern over West China (90°-110°E) also changes from 'northern flood and southern drought' to 'southern flood and northern drought'. The above research is favorable to knowing how the two-stage thermal differences influence summer rainfall in China. | ZHU YanFeng ZHANG Bo CHEN LongXun | 2010 | Chinese Science Bulletin2010，55，14： | 5 |
| 9 | The atmospheric heat budget in summer over Asia monsoon area显示文摘 | Longxun Chen Weiliang Li | 1985 | Advances in Atmospheric Sciences1985，，4： | 3 |
| 10 | Interannual variability of atmospheric heat source/sink over the Qinghai-Xizang(Tibetan) plateau and its relation to circulation显示文摘 | ZHAO Ping CHEN Longxun | 2001 | Advances in Atmos Sci2001，18，： | 1 |
| 11 | Interannual variability of atmospheric heat source/sink over the Qinghai-Xizang(Tibetan)plateau and its relation to circulation显示文摘 | ZHAO Ping CHEN Longxun | 2001 | Advances in Atmos Sci2001，18，： | 1 |
| 12 | Characteristics of heat island effect in Shanghai and its possible mechanism显示文摘 | Chen Longxun Zhu Wenqin Zhou Xiuji | 2003 | Adv Atmos Sci2003，20，6： | 1 |
| 13 | Preliminary analysis of Climatic variation during the last 39 year in China显示文摘 | Chen Longxun Shao Yongning Dong Mon | 1991 | Adv Atmos Sci1991，，8： | 1 |
| 14 | Environment and climate change in China显示文摘 | Zhou Xiuji Chert Longxun Li Weiliang | 1996 | Annual Report (1991-1995)1996，，： | 1 |
| 15 | Westward propagating low-frequency oscillation and its teleconnection in the Eastern Hemisphere显示文摘 | Chen Longxun Xie An | 1988 | Acta Meteorologica Sinica1988，2，3： | 1 |
| 16 | Relationship among seasonalcycles, low frequency oscillations and transient disturbances as revealed from outgoing longwave radiation data 显示文摘 | MURAKAMI T CHEN Longxun XIE An | 1986 | Mon Wea Rev1986，114，8： | 1 |
| 17 | Eastward propagation of 30-60 day perturbation as revealed from outgoing long wave radiation data显示文摘 | Murakami T Chen Longxun Xie An | 1986 | J Atmos Sci1986，43，10： | 1 |
| 18 | Analysis of The Characteristics of 30-60 day low frequency oscillation over Asia during 1998 SCS MEX,Advances in Atmospheric Sciences显示文摘 | CHEN LONGXUN ZHU CONGWEN WANG WEN | 2001 | 18(4):623-6382001，18，4： | 1 |
| 19 | The relationship between the Asian/Australian Monsoon and ENSO on a quasi-four-year scale显示文摘 | Zhu Yanfeng Chen Longxun | 2002 | Adv Atmos Sci2002，19，4： | 1 |
| 20 | The Characteristics of interannual variations of the East Asian monsoon显示文摘 | Chen Longxun | 1992 | Meteor SocJapanK1992，70，： | 1 |
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