气候变化领域集成服务门户(CCPortal): Interannual subtropical indian ocean variability due to long baroclinic planetary waves

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DOI	10.1175/JCLI-D-19-0469.1
	Interannual subtropical indian ocean variability due to long baroclinic planetary waves
	Chapman C.C.; Sloyan B.M.; O'Kane T.J.; Chamberlain M.A.
发表日期	2020
ISSN	0894-8755
起始页码	6765
结束页码	6791
卷号	33 期号:16
英文摘要	Low-frequency variability in the south Indian Ocean is studied by analyzing 200 years of output from a fully coupled climate model simulation. At time scales of 2-10 years, the variability is dominated by westward-propagating features that form on the eastern side of the basin. Using feature tracking and clustering, the spatiotemporal characteristics and preferred pathways of the propagating features are identified and studied in detail. By comparison of the phase speed and vertical structure of the propagating anomalies identified by the feature tracking with linear theory, we conclude that these features are likely mode 1 or 2 baroclinic planetary waves. The effects of this low-frequency variability on the climate system is investigated. By analysis of the mixed-layer temperature budget, it is shown that at particular geographic locations, the propagating features can substantially modify the near-surface ocean and induce significant fluxes of heat into the atmosphere. In turn, these heat fluxes can drive a coherent atmospheric response, although this response does not appear to feed back onto the ocean. Finally, we discuss the implications for the interannual climate predictability. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Budget control; Oceanography; Tropics; Atmospheric response; Climate predictability; Geographic location; Low frequency variability; Mixed layer temperature; Propagating features; Spatiotemporal characteristics; Vertical structures; Climate models; annual variation; baroclinic wave; climate modeling; cluster analysis; heat flux; planetary wave; spatiotemporal analysis; Indian Ocean
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/171178
作者单位	CSIRO Oceans and Atmosphere, Hobart, Tasmania, Australia
推荐引用方式 GB/T 7714	Chapman C.C.,Sloyan B.M.,O'Kane T.J.,et al. Interannual subtropical indian ocean variability due to long baroclinic planetary waves[J],2020,33(16).
APA	Chapman C.C.,Sloyan B.M.,O'Kane T.J.,&Chamberlain M.A..(2020).Interannual subtropical indian ocean variability due to long baroclinic planetary waves.Journal of Climate,33(16).
MLA	Chapman C.C.,et al."Interannual subtropical indian ocean variability due to long baroclinic planetary waves".Journal of Climate 33.16(2020).