Strong Ocean-Atmosphere Interactions during a Short-Term Hot Event over the Western Pacific Warm Pool in Response to El Nino

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Strong Ocean-Atmosphere Interactions during a Short-Term Hot Event over the Western Pacific Warm Pool in Response to El Nino
	Chen, Guixing; Qin, Huiling
刊名	JOURNAL OF CLIMATE
	2016
卷号	29 期号:10 页码:3841-3865
通讯作者	Qin, HL (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, 164 XinGangXi Rd, Guangzhou 510301, Guangdong, Peoples R China.
中文摘要	A short-term hot event with a very high sea surface temperature (SST >= 30 degrees C) occurred in the western Pacific warm pool during November 2006. The interactions between this ocean hot event, atmospheric convection, and large-scale dynamics are studied using satellite observations, buoy measurements, air-sea fluxes analysis, and global reanalysis. It is shown that SST variation and deep convection over the western Pacific behave like a remote response to the El Nino warm SST anomaly in the central Pacific that induces westward-moving atmospheric convection and equatorial waves. The large-scale subsidence associated with propagating convection not only promotes high SSTs in the western Pacific through establishing cloud-free conditions and increasing heat content in a thin ocean mixed layer, but also produces convective instability through capping substantial water vapor in the lower troposphere. Under the precondition of convective instability and the steering of tropical easterlies, some convective systems propagate coherently from the central to western Pacific and intensify. In particular, new cloud clusters are dynamically attracted to the warmest oceans with maximum atmospheric instability. The enhanced convective activity then transfers oceanic energy into the atmosphere, strengthens upper-ocean mixing, and returns the positive SST anomalies to more typical values. In such a coupled system, synoptic-scale convective activities at an interval of 5-8 days are selectively amplified and thus are filtered to an intraseasonal (20-30-day) oscillation, depending on the phase of the hot event over the western Pacific. The observed evidence has implications for the predictability of short-term climate, and it offers critical information for validating the coupled ocean-atmosphere dynamics in climate models.
学科主题	Meteorology & Atmospheric Sciences
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/15366]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Chen, Guixing,Qin, Huiling. Strong Ocean-Atmosphere Interactions during a Short-Term Hot Event over the Western Pacific Warm Pool in Response to El Nino[J]. JOURNAL OF CLIMATE,2016,29(10):3841-3865.
APA	Chen, Guixing,&Qin, Huiling.(2016).Strong Ocean-Atmosphere Interactions during a Short-Term Hot Event over the Western Pacific Warm Pool in Response to El Nino.JOURNAL OF CLIMATE,29(10),3841-3865.
MLA	Chen, Guixing,et al."Strong Ocean-Atmosphere Interactions during a Short-Term Hot Event over the Western Pacific Warm Pool in Response to El Nino".JOURNAL OF CLIMATE 29.10(2016):3841-3865.