气候变化领域集成服务门户(CCPortal): Large-scale atmospheric circulation related to frequent rossby wave breaking near Japan in boreal summer

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DOI	10.1175/JCLI-D-19-0958.1
	Large-scale atmospheric circulation related to frequent rossby wave breaking near Japan in boreal summer
	TAKEMURA K.; MUKOUGAWA H.; MAEDA S.
发表日期	2020
ISSN	0894-8755
起始页码	6731
结束页码	6744
卷号	33 期号:15
英文摘要	Rossby wave propagation along the Asian jet during boreal summer, such as the Silk Road pattern, frequently causes wave breaking near the Asian jet exit region. This study examines the statistical relationship between interannual variability of the Rossby wave breaking frequency near Japan and large-scale atmospheric circulation during the boreal summer. The Rossby wave breaking frequency in the midlatitudes climatologically shows its maximum near Japan, and significantly increases during La Niña years. The uppertropospheric circulation regressed onto the Rossby wave breaking frequency near Japan in August shows large-scale anomalous convergence from the tropical central to eastern Pacific and divergence around the Indian Ocean. The consequent northward anomalous divergent wind over Eurasia contributes to enhancement and northward shift of the Asian jet. The Asian jet also shows meridional meandering with a phase of anomalous anticyclonic circulation near Japan accompanied by the frequent Rossby wave breaking, which is associated with the Silk Road pattern. The frequent Rossby wave breaking is related to southwestward intrusion of anomalous low potential temperature air mass toward the subtropical western North Pacific associated with an enhanced mid-Pacific trough. West of the southwestward cold-air intrusion, enhanced cumulus convection is seen around the northern Philippines, and the Pacific-Japan pattern is significantly seen in the lower troposphere. This result is consistent with a previous study that revealed a linkage mechanism between the Rossby wave breaking near Japan and the Pacific-Japan pattern through dynamically induced ascent resulting in an intrusion of high potential vorticity associated with the Rossby wave breaking. © 2020 American Meteorological Society.
英文关键词	Climatology; Liquid waves; Roads and streets; Silk; Tropics; Wave propagation; Anticyclonic circulation; Atmospheric circulation; Cumulus convection; Interannual variability; Potential temperature; ROSSBY wave propagation; Statistical relationship; Western North Pacific; Ocean currents; air mass; annual variation; atmospheric circulation; atmospheric convection; cumulus; jet flow; La Nina; potential vorticity; Rossby wave; summer; wave breaking; wave propagation; Indian Ocean; Japan
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/171235
作者单位	Graduate School of Science, Kyoto University, Kyoto, Japan; Climate Prediction Division, Japan Meteorological Agency, Tokyo, Japan; Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan
推荐引用方式 GB/T 7714	TAKEMURA K.,MUKOUGAWA H.,MAEDA S.. Large-scale atmospheric circulation related to frequent rossby wave breaking near Japan in boreal summer[J],2020,33(15).
APA	TAKEMURA K.,MUKOUGAWA H.,&MAEDA S..(2020).Large-scale atmospheric circulation related to frequent rossby wave breaking near Japan in boreal summer.Journal of Climate,33(15).
MLA	TAKEMURA K.,et al."Large-scale atmospheric circulation related to frequent rossby wave breaking near Japan in boreal summer".Journal of Climate 33.15(2020).