How much does heat content of the western tropical Pacific Ocean modulate the South China Sea summer monsoon onset in the last four decades?

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	How much does heat content of the western tropical Pacific Ocean modulate the South China Sea summer monsoon onset in the last four decades?
	Feng, Junqiao 1,2; Hu, Dunxin 1,2
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
	2014-07-01
卷号	119 期号:7 页码:4029-4044
通讯作者	Feng, JQ (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China.
英文摘要	The role of the western tropical Pacific Ocean heat content in the South China Sea summer monsoon (SCSSM) onset is investigated in the present paper, by using atmospheric data from NCEP and ocean subsurface temperature data from Japan Meteorology Agency. It is showed from the result that the heat content (HC) of the upper 400 m layer in the western tropical Pacific (WTP), especially in the region of (130 degrees E-150 degrees E, 0 degrees N-14 degrees N) in the last four decades, is a good predictive indicator for the SCSSM onset. Positive (negative) HC anomalies can induce a strong (weak) convection over the WTP, leading to stronger (weaker) Walker circulation and weaker (stronger) western North Pacific subtropical high (WNPSH) in the boreal spring. Consequently, the anomalous westerly (easterly) in the tropical Indian Ocean is favorable (unfavorable) for the airflow into the SCS and for an early (late) WNPSH retreat from the SCS and hence for an early (late) SCSSM onset. It is elucidated that the long-term trend of SCSSM onset changes its sign around 1993/94 from decline to rise, which is responding and attributed to the WTP HC trend. During the period of 1971-1993, the WTP HC shows a significant decrease trend. In particular, a significant decline trend is observed in the HC difference between the WTP and western tropical Indian Ocean, which causes an easterly trend in the SCS and strengthened WNPSH trend, leading to a late onset trend of SCSSM. The situation is reverse after 1993/94.
学科主题	Oceanography
收录类别	SCI
语种	英语
WOS记录号	WOS:000340415500001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/23929]
专题	海洋研究所_海洋环流与波动重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China 2.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Feng, Junqiao,Hu, Dunxin. How much does heat content of the western tropical Pacific Ocean modulate the South China Sea summer monsoon onset in the last four decades?[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2014,119(7):4029-4044.
APA	Feng, Junqiao,&Hu, Dunxin.(2014).How much does heat content of the western tropical Pacific Ocean modulate the South China Sea summer monsoon onset in the last four decades?.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,119(7),4029-4044.
MLA	Feng, Junqiao,et al."How much does heat content of the western tropical Pacific Ocean modulate the South China Sea summer monsoon onset in the last four decades?".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 119.7(2014):4029-4044.