气候变化领域集成服务门户(CCPortal): The Role of Tides in Ocean-Ice Shelf Interactions in the Southwestern Weddell Sea

CCPortal

DOI	10.1029/2019JC015847
	The Role of Tides in Ocean-Ice Shelf Interactions in the Southwestern Weddell Sea
	Hausmann U.; Sallée J.-B.; Jourdain N.C.; Mathiot P.; Rousset C.; Madec G.; Deshayes J.; Hattermann T.
发表日期	2020
ISSN	21699275
卷号	125 期号:6
英文摘要	To investigate the role of tides in Weddell Sea ocean-ice shelf melt interactions, and resulting consequences for ocean properties and sea ice interactions, we develop a regional ocean-sea ice model configuration, with time-varying ocean boundary and atmospheric forcing, including the deep open ocean (at 2.5–4 km horizontal resolution), the southwestern continental shelf (≈2.5 km), and the adjacent cavities of eastern Weddell, Larsen, and Filchner-Ronne ice shelves (FRIS, 1.5–2.5 km). Simulated circulation, water mass, and ice shelf melt properties compare overall well with available open ocean and cavity observational knowledge. Tides are shown to enhance the kinetic energy of the time-varying flow in contact with the ice shelves, thereby increasing melt. This dynamically driven impact of tides on net melting is to almost 90% compensated by cooling through the meltwater that is produced but not quickly exported from regions of melting in the Weddell Sea cold-cavity regime. The resulting systematic tide-driven enhancement of both produced meltwater and its refreezing on ascending branches of, especially the FRIS, cavity circulation acts to increase net ice shelf melting (by 50% in respect to the state without tides, ≈50 Gt yr−1). In addition, tides also increase the melt-induced FRIS cavity circulation, and the meltwater export by the FRIS outflow. Simulations suggest attendant changes on the open-ocean southwestern continental shelf, characterized by overall freshening and small year-round sea ice thickening, as well as in the deep southwestern Weddell Sea in the form of a marked freshening of newly formed bottom waters. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Antarctica; Filchner-Ronne; ice shelf melt; NEMO; tides; Weddell Sea
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186840
作者单位	Sorbonne-Université, LOCEAN-IPSL, Paris, France; Université Grenoble Alpes/CNRS/IRD/G-INP, IGE, Grenoble, France; Met Office, Exeter, United Kingdom; AWI, Bremerhaven, Germany; Norwegian Polar Institute, Tromsø, Norway
推荐引用方式 GB/T 7714	Hausmann U.,Sallée J.-B.,Jourdain N.C.,et al. The Role of Tides in Ocean-Ice Shelf Interactions in the Southwestern Weddell Sea[J],2020,125(6).
APA	Hausmann U..,Sallée J.-B..,Jourdain N.C..,Mathiot P..,Rousset C..,...&Hattermann T..(2020).The Role of Tides in Ocean-Ice Shelf Interactions in the Southwestern Weddell Sea.Journal of Geophysical Research: Oceans,125(6).
MLA	Hausmann U.,et al."The Role of Tides in Ocean-Ice Shelf Interactions in the Southwestern Weddell Sea".Journal of Geophysical Research: Oceans 125.6(2020).