气候变化领域集成服务门户(CCPortal): Evolution of Denmark Strait Overflow Cyclones and Their Relationship to Overflow Surges

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DOI	10.1029/2019GL086759
	Evolution of Denmark Strait Overflow Cyclones and Their Relationship to Overflow Surges
	Almansi M.; Haine T.W.N.; Gelderloos R.; Pickart R.S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:4
英文摘要	Mesoscale features present at the Denmark Strait sill regularly enhance the volume transport of the Denmark Strait overflow (DSO). They are important for the Atlantic Meridional Overturning Circulation and ultimately, for the global climate system. Using a realistic numerical model, we find new evidence of the causal relationship between overflow surges (i.e., mesoscale features associated with high-transport events) and DSO cyclones observed downstream. Most of the cyclones form at the Denmark Strait sill during overflow surges and, because of potential vorticity conservation and stretching of the water column, grow as they move equatorward. A fraction of the cyclones form downstream of the sill, when anticyclonic vortices formed during high-transport events start collapsing. Regardless of their formation mechanism, DSO cyclones weaken starting roughly 150 km downstream of the sill, and potential vorticity is only materially conserved during the growth phase. ©2020. The Authors.
英文关键词	Storms; Vorticity; Anti-cyclonic vortices; Atlantic meridional overturning circulations; boluses; Causal relationships; Denmark Strait overflows; Formation mechanism; Global climate system; pulses; Flow of water; cyclone; global climate; meridional circulation; potential vorticity; volume transport; Arctic; Atlantic Ocean; Denmark Strait
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170719
作者单位	Department of Earth and Planetary Sciences, The Johns Hopkins University, Baltimore, MD, United States; Woods Hole Oceanographic Institution, Woods Hole, MA, United States
推荐引用方式 GB/T 7714	Almansi M.,Haine T.W.N.,Gelderloos R.,et al. Evolution of Denmark Strait Overflow Cyclones and Their Relationship to Overflow Surges[J],2020,47(4).
APA	Almansi M.,Haine T.W.N.,Gelderloos R.,&Pickart R.S..(2020).Evolution of Denmark Strait Overflow Cyclones and Their Relationship to Overflow Surges.Geophysical Research Letters,47(4).
MLA	Almansi M.,et al."Evolution of Denmark Strait Overflow Cyclones and Their Relationship to Overflow Surges".Geophysical Research Letters 47.4(2020).