气候变化领域集成服务门户(CCPortal): Investigating the role of the tibetan plateau in ENSO variability

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DOI	10.1175/JCLI-D-19-0422.1
	Investigating the role of the tibetan plateau in ENSO variability
	Wen Q.; Döös K.; Lu Z.; Han Z.; Yang H.
发表日期	2020
ISSN	0894-8755
起始页码	4835
结束页码	4852
卷号	33 期号:11
英文摘要	The role of the Tibetan Plateau (TP) in El Niño-Southern Oscillation (ENSO) variability is investigated using coupled model experiments with different topography setups. Removing the TP results in weakened trade winds in the tropical Pacific, an eastward shift of atmospheric convection center, a shallower mixed layer in the equatorial Pacific, and a flattened equatorial thermocline, which leads to an El Niño-like sea surface temperature (SST) response. In association with these mean climate changes in the tropical atmosphere- ocean system, the ENSO variability exhibits a much stronger amplitude in the world without the TP. Detailed diagnoses reveal that in the absence of the TP, both thermocline feedback in the eastern equatorial Pacific and Ekman pumping feedback in the central-eastern equatorial Pacific are enhanced substantially, leading to stronger ENSO variability. The changes of these two feedbacks are caused by the eastward shift of the atmospheric convection center and enhanced ocean sensitivity; the latter is due to the shallower mixed layer and flattened thermocline. This study suggests that the presence of the TP may be of fundamental importance for modern-day tropical climate variability; namely, the TP may have played a role in suppressing ENSO variability. © 2020 American Meteorological Society.
英文关键词	Atmospheric pressure; Atmospheric thermodynamics; Climate change; Natural convection; Stream flow; Surface waters; Topography; Tropics; Atmospheric convection; Coupled modeling; Eastern equatorial Pacific; Equatorial Pacific; Sea surface temperature (SST); Southern oscillation; Tropical atmospheres; Tropical climates; Oceanography; atmosphere-ocean system; atmospheric convection; climate change; climate variation; Ekman pumping; El Nino-Southern Oscillation; sea surface temperature; thermocline; trade wind; China; Pacific Ocean; Pacific Ocean (Equatorial); Pacific Ocean (Tropical); Qinghai-Xizang Plateau
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171288
作者单位	Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China; Department of Meteorology (MISU), Stockholm University, Stockholm, Sweden; Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden; College of Atmospheric Sciences, Lanzhou University, Lanzhou, China; Department of Physical Geography and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
推荐引用方式 GB/T 7714	Wen Q.,Döös K.,Lu Z.,et al. Investigating the role of the tibetan plateau in ENSO variability[J],2020,33(11).
APA	Wen Q.,Döös K.,Lu Z.,Han Z.,&Yang H..(2020).Investigating the role of the tibetan plateau in ENSO variability.Journal of Climate,33(11).
MLA	Wen Q.,et al."Investigating the role of the tibetan plateau in ENSO variability".Journal of Climate 33.11(2020).