气候变化领域集成服务门户(CCPortal): Influence of Northern Hemispheric Winter Warming on the Pacific Storm Track

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DOI	10.1007/s00382-020-05544-4
	Influence of Northern Hemispheric Winter Warming on the Pacific Storm Track
	Park H.-J.; Kim K.-Y.
发表日期	2021
ISSN	0930-7575
卷号	56 期号:2021-05-06
英文摘要	Effect of global warming on the sub-seasonal variability of the Northern Hemispheric winter (NDJFM) Pacific storm-track (PST) activity has been investigated. Previous studies showed that the winter-averaged PST has shifted northward and intensified, which was explained in terms of energy exchange with the mean field. Effect of global warming exhibits spatio-temporal heterogeneity with predominance over the Arctic region and in the winter season. Therefore, seasonal averaging may hide important features on sub-seasonal scales. In this study, distinct sub-seasonal response in storm track activities to winter Northern Hemispheric warming is analyzed applying cyclostationary empirical orthogonal function analysis to ERA5 data. The key findings are as follows. Change in the PST is not uniform throughout the winter; the PST shifts northward in early winter (NDJ) and intensifies in late winter (FM). In early winter, the combined effect of weakened baroclinic process to the south of the climatological PST and weakened barotropic damping to the north is responsible for the northward shift. In late winter, both processes contribute to the amplification of the PST. Further, change in baroclinic energy conversion is quantitatively dominated by eddy heat flux, whereas axial tilting of eddies is primarily responsible for change in barotropic energy conversion. A close relationship between anomalous eddy heat flux and anomalous boundary heating, which is largely determined by surface turbulent heat flux, is also demonstrated. © 2021, The Author(s).
英文关键词	Local eddy energetics; Moist static energy budget; Northern hemispheric warming; Subseasonal pacific storm track change
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183379
作者单位	School of Earth and Environmental Sciences, Seoul National University, Seoul, 08826, South Korea
推荐引用方式 GB/T 7714	Park H.-J.,Kim K.-Y.. Influence of Northern Hemispheric Winter Warming on the Pacific Storm Track[J],2021,56(2021-05-06).
APA	Park H.-J.,&Kim K.-Y..(2021).Influence of Northern Hemispheric Winter Warming on the Pacific Storm Track.Climate Dynamics,56(2021-05-06).
MLA	Park H.-J.,et al."Influence of Northern Hemispheric Winter Warming on the Pacific Storm Track".Climate Dynamics 56.2021-05-06(2021).