气候变化领域集成服务门户(CCPortal): ENSO-unrelated variability in indo-northwest pacific climate: Regional coupled ocean-atmospheric feedback

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DOI	10.1175/JCLI-D-19-0426.1
	ENSO-unrelated variability in indo-northwest pacific climate: Regional coupled ocean-atmospheric feedback
	Wang C.-Y.; Xie S.-P.; Kosaka Y.
发表日期	2020
ISSN	0894-8755
起始页码	4095
结束页码	4108
卷号	33 期号:10
英文摘要	Regional ocean-atmospheric interactions in the summer tropical Indo-northwest Pacific region are investigated using a tropical Pacific Ocean-global atmosphere pacemaker experiment with a coupled ocean-atmospheric model (cPOGA) and a parallel atmosphere model simulation (aPOGA) forced with sea surface temperature (SST) variations from cPOGA. Whereas the ensemble mean features pronounced influences of El Niño-Southern Oscillation (ENSO), the ensemble spread represents internal variability unrelated to ENSO. By comparing the aPOGA and cPOGA, this study examines the effect of the ocean-atmosphere coupling on the ENSO-unrelated variability. In boreal summer, ocean-atmosphere coupling induces local positive feedback to enhance the variance and persistence of the sea level pressure and rainfall variability over the northwest Pacific and likewise induces local negative feedback to suppress the variance and persistence of the sea level pressure and rainfall variability over the north Indian Ocean. Anomalous surface heat fluxes induced by internal atmosphere variability cause SST to change, and SST anomalies feed back onto the atmosphere through atmospheric convection. The local feedback is sensitive to the background winds: positive under the mean easterlies and negative under the mean westerlies. In addition, north Indian Ocean SST anomalies reinforce the low-level anomalous circulation over the northwest Pacific through atmospheric Kelvin waves. This interbasin interaction, along with the local feedback, strengthens both the variance and persistence of atmospheric variability over the northwest Pacific. The response of the regional Indo-northwest Pacific mode to ENSO and influences on the Asian summer monsoon are discussed. © 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	Atmospheric pressure; Atmospheric thermodynamics; Heat flux; Natural convection; Rain; Sea level; Surface waters; Tropics; Asian summer monsoons; Atmosphere variability; Atmospheric convection; Atmospheric feedbacks; Atmospheric interaction; Atmospheric variability; Sea surface temperature (SST); Tropical Pacific ocean; Climatology; atmosphere-ocean coupling; atmospheric convection; climate effect; climate feedback; El Nino-Southern Oscillation; regional climate; sea surface temperature; spatial variation; temperature anomaly; Indian Ocean; Indian Ocean (North); Pacific Ocean; Pacific Ocean (Northwest)
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/171316
作者单位	Physical Oceanography Laboratory, Qingdao Collaborative Innovation Center of Marine Science and Technology, Ocean University of China, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States; Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan
推荐引用方式 GB/T 7714	Wang C.-Y.,Xie S.-P.,Kosaka Y.. ENSO-unrelated variability in indo-northwest pacific climate: Regional coupled ocean-atmospheric feedback[J],2020,33(10).
APA	Wang C.-Y.,Xie S.-P.,&Kosaka Y..(2020).ENSO-unrelated variability in indo-northwest pacific climate: Regional coupled ocean-atmospheric feedback.Journal of Climate,33(10).
MLA	Wang C.-Y.,et al."ENSO-unrelated variability in indo-northwest pacific climate: Regional coupled ocean-atmospheric feedback".Journal of Climate 33.10(2020).