气候变化领域集成服务门户(CCPortal): North Atlantic subsurface temperature response controlled by effective freshwater input in “Heinrich” events

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DOI	10.1016/j.epsl.2020.116247
	North Atlantic subsurface temperature response controlled by effective freshwater input in “Heinrich” events
	He C.; Liu Z.; Zhu J.; Zhang J.; Gu S.; Otto-Bliesner B.L.; Brady E.; Zhu C.; Jin Y.; Sun J.
发表日期	2020
ISSN	0012821X
卷号	539
英文摘要	The northern North Atlantic (NNA) subsurface temperature in response to the slowdown of the Atlantic meridional overturning circulation (AMOC) is crucial for ice sheet calving and recovery of the AMOC in Heinrich events. Paleoclimate proxies and modeling studies suggest that the NNA subsurface exhibits a robust warming during Heinrich 1, but with a less clear response during Younger Dryas (YD). The mechanism for the potentially different subsurface responses has remained not well understood. Previous studies show different NNA subsurface response depending on hosing at different locations. Here, by examining a suite of “water-hosing” experiments with different hosing regions and intensities, we show that, regardless of the hosing location, NNA subsurface temperature response is determined by the effective freshening over the NNA deep convective regions through the competition between the warming associated with the suppressed vertical mixing and the cooling associated with the weakened AMOC heat transport. A weak effective freshening favors advective effect and, in turn, cooling, while a strong effective freshening strengthens the mixing effect and leads to a warming. Our results suggest that a cooling may occur in the NNA subsurface during YD. © 2020 The Author(s)
关键词	Abrupt climate change Atlantic meridional overturning circulation Heinrich events Paleoclimate
英文关键词	Climate change; Mixing; Abrupt climate change; Atlantic meridional overturning circulations; Freshwater inputs; Heinrich Events; Paleoclimate proxy; Paleoclimates; Subsurface temperature; Vertical mixing; Oceanography; climate variation; Heinrich event; meridional circulation; overturn; paleoclimate; surface temperature; warming; Younger Dryas; Atlantic Ocean; Atlantic Ocean (North)
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202634
作者单位	Key Laboratory of Meteorological Disaster of Ministry of Education, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing, China; Atmospheric Science Program, Department of Geography, Ohio State University, Columbus, OH, United States; Open Studio for Ocean-Climate-Isotope Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China; Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, United States; Computational Physics and Methods (CCS-2), Center for Nonlinear Studies (CNLS), Los Alamos National Laboratory, Los Alamos, NM, United States; Physical Oceanography Laboratory, Ocean University of China, Qingdao, China; National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, Boulder, CO, United States; Department of Atmospheric and Oceanic Sciences, Peking University, Beijing, China; College of Computer, National Unive...
推荐引用方式 GB/T 7714	He C.,Liu Z.,Zhu J.,等. North Atlantic subsurface temperature response controlled by effective freshwater input in “Heinrich” events[J],2020,539.
APA	He C..,Liu Z..,Zhu J..,Zhang J..,Gu S..,...&Sun J..(2020).North Atlantic subsurface temperature response controlled by effective freshwater input in “Heinrich” events.Earth and Planetary Science Letters,539.
MLA	He C.,et al."North Atlantic subsurface temperature response controlled by effective freshwater input in “Heinrich” events".Earth and Planetary Science Letters 539(2020).