气候变化领域集成服务门户(CCPortal): What modulates the intensity of synoptic-scale variability over the western north pacific during boreal summer and fall?

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DOI	10.1175/JCLI-D-20-0477.1
	What modulates the intensity of synoptic-scale variability over the western north pacific during boreal summer and fall?
	Wu R.; Wang Y.; Cao X.
发表日期	2021
ISSN	08948755
起始页码	3645
结束页码	3662
卷号	34 期号:9
英文摘要	The present study investigates the factors that affect the year-to-year change in the intensity of synoptic-scale variability (SSV) over the tropical western North Pacific (TWNP) during boreal summer and fall. It is found that the intensity of the TWNP SSV in summer is associated with the equatorial central-eastern Pacific sea surface temperature (SST) anomalies that modulate the background fields through a Rossby wave response both in the source region and along the propagation path of the synoptic-scale disturbances. In fall, the intensity of the TWNP SSV is related to an SST anomaly pattern with opposite anomalies in the equatorial central Pacific and TWNP that modulates the background fields from the equatorial central Pacific to TWNP. However, the equatorial central Pacific SST anomalies alone fail to change the intensity of the TWNP SSV as the induced background field changes are limited to the equatorial central Pacific. It is shown that tropical western Pacific SST anomalies may induce notable changes in the intensity of the TWNP SSV. The relation of the TWNP SSV to the equatorial eastern Pacific SST is weak due to opposite SST anomalies in different types of years. Both seasonal mean and intraseasonal flows provide sources of barotropic energy for the change in the intensity of the TWNP synoptic-scale disturbances in summer. Seasonal mean flow has a main contribution to the barotropic energy conversion for the change in the intensity of the TWNP synoptic-scale disturbances in fall. © 2021 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	Climate variability; ENSO; Interannual variability; Intraseasonal variability; Sea surface temperature; Tropical variability
语种	英语
scopus关键词	Energy conversion; Geophysics; Mechanical waves; Surface waters; Tropics; Background field; Eastern pacific; Propagation paths; Rossby wave response; Sea surface temperature anomalies; Synoptic scale variability; Tropical Western Pacific; Western North Pacific; Oceanography
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/178612
作者单位	School of Earth Sciences, Zhejiang University, Hangzhou, China; Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Wu R.,Wang Y.,Cao X.. What modulates the intensity of synoptic-scale variability over the western north pacific during boreal summer and fall?[J],2021,34(9).
APA	Wu R.,Wang Y.,&Cao X..(2021).What modulates the intensity of synoptic-scale variability over the western north pacific during boreal summer and fall?.Journal of Climate,34(9).
MLA	Wu R.,et al."What modulates the intensity of synoptic-scale variability over the western north pacific during boreal summer and fall?".Journal of Climate 34.9(2021).