globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-16-0729.1
Scopus记录号: 2-s2.0-85027278536
论文题名:
The impact of layer perturbation potential energy on the East Asian summer monsoon
作者: Huyan L.; Li J.; Zhao S.; Sun C.; Dong D.; Liu T.; Zhao Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期:17
起始页码: 7087
结束页码: 7103
语种: 英语
Scopus关键词: Atmospheric thermodynamics ; Climate change ; Earth atmosphere ; Kinetic energy ; Kinetics ; Molecular physics ; Oceanography ; Rain ; Surface waters ; Tropics ; Asia ; East Asian summer monsoon ; Meridional circulation ; Middle and lower reaches of the yangtze rivers ; Monsoons ; Perturbation potential ; Sea surface temperature (SST) ; Seasonal effects ; Potential energy
英文摘要: This paper analyzes the relationship between the 1000-850-hPa layer perturbation potential energy (LPPE) as the difference in local potential energy between the actual state and the reference state and the East Asian summer monsoon (EASM) using reanalysis and observational datasets. The EASM is closely related to the first-order moment term of LPPE (LPPE1) from the preceding March to the boreal summer over three key regions: the eastern Indian Ocean, the subtropical central Pacific, and midlatitude East Asia. The LPPE1 pattern (-, +, +), with negative values over the eastern Indian Ocean, positive values over the subtropical central Pacific, and positive values over East Asia, corresponds to negative LPPE1 anomalies over the south of the EASM region but positive LPPE1 anomalies over the north of the EASM region, which lead to an anomalous downward branch over the southern region but an upward branch over the northern region. The anomalous vertical motion affects the local meridional circulation over East Asia that leads to a southwesterly wind anomaly over East Asia (south of 30°N) at 850 hPa and anomalous downward motion over 100°-120°E (along 25°-35°N), resulting in a stronger EASM, more kinetic energy over the EASM region, and less boreal summer rainfall in the middle and lower reaches of the Yangtze River valley (24°-36°N, 90°-125°E). These LPPE1 anomalies in the eastern Indian Ocean and subtropical central Pacific appear to be connected to changes in local sea surface temperature through the release of latent heat. © 2017 American Meteorological Society.
资助项目: NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49869
Appears in Collections:气候变化事实与影响

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作者单位: State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China; Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; School of Ocean and Earth Sciences and Technology, University of Hawai'i at Manoa, Honolulu, HI, United States; Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Hangzhou, China; National Meteorological Information Center, Beijing, China; College of Global Change and Earth System Science, Beijing Normal University, Beijing, China; College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing, China

Recommended Citation:
Huyan L.,Li J.,Zhao S.,et al. The impact of layer perturbation potential energy on the East Asian summer monsoon[J]. Journal of Climate,2017-01-01,30(17)
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