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Science China Earth Sciences 2008年第7期51卷 1021-1035页

作者： LIU YunYun1,2,3 & DING YiHui2 1 Chinese Academy of Meteorological Sciences, Beijing 100081, China 2 national climate center, Beijing 100081, China 3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China 1. Chinese Academy of Meteorological Sciences Beijing 100081 China 2. national climate center Beijing 100081 China 3. Graduate University of Chinese Academy of Sciences Beijing 100049 China

Based on the Indian and Chinese precipitation data and the NCEP-NCAR reanalysis circulation data, the relationship between the Indian summer monsoon (ISM) onset and the Meiyu over the Yangtze River Valley has been discussed by the methods of correlation analysis and composite analysis. The results show that the date of ISM onset over Kerala in the southwestern coast of the Indian Peninsula is about two weeks earlier than the beginning of the Meiyu over the Yangtze River Valley. After the outbreak of ISM, the teleconnection mode sets up from the western coast of India via the Bay of Bengal (BOB) to the Yangtze River Valley and southern Japan. It is different both in time and space from the telecon- nection mode which is from the northwest of India via the Tibetan Plateau to northern China. The for- mer mode is defined as the "south" teleconnection of the Asian summer monsoon, forming in the pe- riod of ISM onset; while the latter mode is called the "north" teleconnection, mainly occurring in the Asian monsoon culminant period. During the process of the "south" teleconnection’s formation, the Asian monsoon circulation has experienced a series of important changes: ISM onset, the northward movement of the south Asia high (SAH), the onset vortex occurrence, the eastward extension of the stronger tropical westerly belt, and the northeastward jump of the western Pacific subtropical high (WPSH), etc. Consequently, since ISM sets up over Kerala, the whole Asian continent is covered by the upper SAH after about two weeks, while in the mid- and lower troposphere, a strong wind belt forms from the Arabian Sea via the southern India, BOB and the South China Sea (SCS), then along the western flank of WPSH, to the Yangtze River Valley and southern Japan. With the northward moving of the subtropical jet streams, the upper westerly jet stream and the low level jet have been coupled ver- tically over east Asia, while the Yangtze River Valley happens to locate in the ascending motion

关键词： Indian summer monsoon (ISM) the Meiyu over the Yangtze River Valley teleconnection mode

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1999年北半球大气环流特征及其影响

气象 2000年第4期26卷 12-16页

作者： Song Wenling (national climate center,Beijing 100081) 国家气候中心北京 100081

1999年北半球主要环流特征为 :5 0 0 h Pa西太平洋副热带高压较常年明显偏弱 ,春、夏季副高位置异常偏东 ;东亚地区夏季 5 0 0 h Pa位势高度距平场上表现为北高南低 ,大陆高压较强。亚洲中纬度经、纬向环流交替出现 ,阶段性明显 ;冬季... 详细信息

1999年北半球主要环流特征为 :5 0 0 h Pa西太平洋副热带高压较常年明显偏弱 ,春、夏季副高位置异常偏东 ;东亚地区夏季 5 0 0 h Pa位势高度距平场上表现为北高南低 ,大陆高压较强。亚洲中纬度经、纬向环流交替出现 ,阶段性明显 ;冬季冷空气异常偏弱 ,东亚夏季风加强。冬、春季热带对流活动强盛 ,入夏以后迅速减弱。在 L a-

关键词：环流特征西风环流季风 La-nina 环流特征

The relationship between the canonical ENSO and the phase transition of the Antarctic oscillation at the quasi-quadrennial timescale

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Acta Oceanologica Sinica 2010年第6期29卷 26-34页

作者： LIU Changzheng XUE Feng national climate center Beijing 100081 China LASG Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

A correlation analysis is performed to investigate the relationship between El Nino-Southern Oscillation （ENSO） and the Antarctic oscillation （AAO） at the quasi-quadrennial （QQ） *** is found that the cold tongue index （CTI） and the AAO index （AAOI） are negatively correlated with about a 7-month lead-time,while they are positively correlated with about a 15-month *** further explore this relationship,complex empirical orthogonal function analysis is employed in the QQ sea level pressure （SLP） anomalies from 1951 to *** results indicate that,during the ENSO cycle,there exists one kind of global tropical wave of wavenumber 1 （GTW1） propagating *** the traveling of GTW1,the tropical SLP anomaly tends to intrude into the southern ***,three strong signals travel synchronously along the circumSouth-Pacific path,and a relatively weak signal extends eastward and poleward over the South Ocean in the Atlantic-Indian Ocean *** the propagation of these signals,the AAO phase tends to be reversed *** a result,there exists an evident lead-lag correlation between CTI and *** can be concluded that ENSO plays a key role in the phase transition of AAO at the QQ *** is also noticed that this regular relationship is only evident in the canonical ENSO events,for which sea surface temperature （SST） anomalies extend westward from the tropical eastern *** the other hand,the similar relationships are not found among those atypical ENSO events for which SST anomalies spread eastward from the central Pacific,such as the 1982-1983 ENSO event.

关键词： ENSO Antarctic oscillation the quasi-quadrennial timescale the global tropical wave of wavenumber 1

东北全新世乔木种类演化的区域差异及其迁移问题(英文)

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微体古生物学报 2000年第2期17卷 155-163页

作者：任国玉中国气象局国家气候中心北京100081

根据花粉等时线图和代表性剖面花粉资料 ,总结了东北全新世主要乔木种类出现和发展的地区差异。三江平原和小兴安岭地区的栎属与松属的出现和发展分别比长白山地区推迟 1— 2千多年。这个时间上的差别说明它们可能有从南向北的迁移过程... 详细信息

根据花粉等时线图和代表性剖面花粉资料 ,总结了东北全新世主要乔木种类出现和发展的地区差异。三江平原和小兴安岭地区的栎属与松属的出现和发展分别比长白山地区推迟 1— 2千多年。这个时间上的差别说明它们可能有从南向北的迁移过程。不同乔木种类迁移的速率也不一样。初步估计的几种乔木迁移速率为 :栎属 2 50— 590 m/ a,松属 1 50— 580 m/ a,胡桃属2 0 0— 81 0 m/ a。这种差异可能主要与种子大小、河流和地形等因素有联系。

关键词：森林演化物种迁移全新世乔木区域差异

Air-sea heat flux exchange over the South China Sea under different weather conditions before and after southwest monsoon onset in 2000

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Acta Oceanologica Sinica 2003年第3期22卷 369-383页

作者： Junyue Yan, Huadong Yao, Jianglong Li, Zhiyi Tang, Guorong Jiang, Wenyu Sha, Xunqiang Li, Yiguo Xiao national climate center, Beijing 100081, China. E-mail: yanjy@cma.gov.cnPLA University of Science Technology, Nanjing 211101, China Natl climate Ctr Beijing 100081 Peoples R China PLA Univ Sci Technol Nanjing 211101 Peoples R China

With the data observed from the Second SCS Air-Sea Flux Experiment on the Xisha air-sea flux research tower, the radiation budget, latent, sensible heat fluxes and net oceanic heat budgets were caculated before and after summer monsoon onset. It is discovered that, after summer monsoon onset, there are considerable changes in air-sea fluxes, especially in latent heat fluxes and net oceanic heat budget. Furthermore, the analyzed results of five synoptic stages are compared. And the characteristics of the flux transfer during different stages around onset of South China Sea monsoon are discussed. The flux change shows that there is an oceanic heat accumulating process during the pre-onset and the break period, as same as oceanic heat losing process during the onset period. Moreover, latent fluxes, the water vapor moving to the continent, even the rainfall appearance in Chinese Mainland also can be influenced by southwester. Comparing Xisha fluxes with those obtained from the Indian Ocean and the western Pacific Ocean, their differences may be observed. It is the reason why SSTs can keep stable over the South China Sea while they decrease quickly over the Arabian Sea and the Bay of Bengal after monsoon onset.

关键词： South China Sea air-sea heat fluxes South China Sea monsoon

Progress in China’s climate change study in the 20th century

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Journal of Geographical Sciences 2004年第S1期 5-13页

作者： ZHAI Panmao1,2, CHAO Qingchen1,2, ZOU Xukai1,2(1. Laboratory for climate Studies, China Meteorological Administration, Beijing 100081, China 2. national climate center, China Meteorological Administration, Beijing 100081, China)

Studies on the 20th century climate change in China have revealed that under the background of global warming over the past century, climate in China has also experienced significant change with mean annual temperature increased by about 0.5 oC. More reliable results for the latter part of the 20th century indicate that the largest warming occurred in Northwest China, North China and Northeast China, and the warming in winter is most significant. Although no obvious increase or decrease trends were detected for mean precipitation over China in the past half century, regional differences are very distinct. In the middle and lower reaches of the Yangtze River, precipitation increased, while that in the Yellow River Basin markedly decreased. Studies suggest that climate change in China seems to be related not only with the internal factors such as ENSO, PDO, and the others, but also with the anthropogenic effects such as greenhouse gas emissions, and land use. The future climate change studies in China seem to be important in narrowing understanding the nature of China's climate change and its main causes, since it is significant for projection and for impact assessment of climate change in the future.

关键词： th century climate change China

Possible mechanism of the effect of convection over Asian-Australian “land bridge” on the East Asian summer monsoon onset

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Science China Earth Sciences 2006年第11期49卷 1223-1232页

作者： HE Jinhai1, WEN Min2, DING Yihui3 & ZHANG Renhe2 1. Jiangsu Key Laboratory of Meteorological Disaster (KLME), Nanjing Institute of Meteorology, Nanjing University of Informa- tion Science and Technology, Nanjing 210044, China 2. State Key Laboratory of Severe Weather (LaSW), Chinese Academy of Meteorological Sciences, Beijing 100081, China 3. national climate center, Chinese Meteorological Administration, Beijing 100081, China 1. Jiangsu Key Laboratory of Meteorological Disaster (KLME) Nanjing Institute of Meteorology Nanjing University of Information Science and Technology Nanjing 210044 China 2. State Key Laboratory of Severe Weather (LaSW) Chinese Academy of Meteorological Sciences Beijing 100081 China 3. national climate center Chinese Meteorological Administration Beijing 100081 China

The Asian-Australian “land bridge” is an area with the most vigorous convection in Asian monsoon region in boreal spring, where the onset and march of convection are well associated with the onset of East Asian summer monsoon. The convection occurs over Indo-China Peninsula as early as mid-April, which exerts critical impact on the evolution of monsoon circulation. Before mid-April there are primarily sensible heatings to the atmosphere over Indo-China Peninsula and Indian Peninsula, so the apparent heating ratios over them decrease with height. However, after mid-April it changes into latent heating over Indo-China Peninsula due to the onset of convection, and the apparent heating ratio increases with height in mid- and lower troposphere. The vertical distribution of heating ratio and its differences between Indo-China Peninsula and Indian Peninsula are the key factors leading to the splitting of boreal subtropical high belt over the Bay of Bengal. Such mechanism is strongly supported by the fact that the evolution of the vertical heating ratio gradient above Indo-China Peninsula leads that of 850 hPa vorticity over the Bay of Bengal. Convections over Indo-China Peninsula and its surrounding areas further increase after the splitting. Since then, there is a positive feedback lying among the convective heating, the eastward retreat of the subtropical high and the march of monsoon, which is a possible mechanism of the advance of summer monsoon and convection from Indo-China Peninsula to South China Sea.

关键词： Asian-Australian 'land bridge', tropical convection, Indo-China Peninsula, the splitting of boreal subtropical high belt, East Asian summer monsoon onset.

A severe drought event in northern China in winter 2008-2009 and the possible influences of La Nina and Tibetan Plateau

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A severe drought event in northern China in winter 2008-2009...

Application of long-range correlation and multi-fractal analysis for the depiction of drought risk

“2010年北京气象学会中青年优秀论文评选”学术研讨会

作者： Hui Gao and Song Yang 1 national climate center,China Meteorological Administration, Beijing,China. 2 climate Prediction center,NOAA,Camp Springs,Maryland,USA.

Severe drought occurred in northern China in winter 2008-09 and the La Nina event might have exerted a major influence on the *** correlation analysis and case investigation indicate that severe wintertime droughts in northern China mostly occur under La Nina *** La Nina event in 2008-2009 increased the differences in temperature and atmospheric pressure between the Indo-Pacific Oceans and the Asian continent and intensified the northeasterly East Asian winter monsoon *** winter 2008-2009,the western Pacific subtropical high was located farther south than normal,associating with a southward shift of the Intertropical Convergence Zone so that wet and warm flow could hardly reach northern China from the tropical ***,the La Nina event in 2008-2009 strengthened the upstream portion of the upper tropospheric jet stream and the descending branch of the meridional cell over the subtropics,causing a negative divergence anomaly to the northern side of the jet *** a result,the airflow over northern China is more convergent (divergent) at the upper(lower) levels,unfavorable for *** winter 2008- 2009,the surface and tropospheric temperatures over the Tibetan Plateau were above *** a result,the India-Burma trough was shallower and less active,weakening the moisture transportation from the Bay of Bengal to eastern *** feature was possibly related to the less snow over the *** also show that both the Nino3.4 SST and the Tibet Plateau temperature in the previous autumn can be considered indicators of the winter drought in northern China.

关键词：

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Chinese Physics B 2016年第1期25卷 831-837页

作者：侯威颜鹏程李淑萍涂刚胡经国 national climate center Beijing 100081China College of Atmospheric Sciences Lanzhou UniversityLanzhou 730000China Jilin Meteorological Science Institute Changchun 130062China Department of Physics Yangzhou University Yangzhou 225002China

By using the multi-fractal detrended fluctuation analysis method, we analyze the nonlinear property of drought in southwestern China. The results indicate that the occurrence of drought in southwestern China is multi-fractal and long- range correlated, and these properties are indifferent to timescales. A power-law decay distribution well describes the return interval of drought events and the auto-correlation. Furthermore, a drought risk exponent based on the multi-fractal property and the long-range correlation is presented. This risk exponent can give useful information about whether the drought may or may not occur in future, and provide a guidance function for preventing disasters and reducing damage.

关键词： multi-fractal detrended fluctuation analysis return intervals drought risk