气候变化领域集成服务门户(CCPortal): Sensitivity of the Baltic Sea Overturning Circulation to Long-Term Atmospheric and Hydrological Changes

CCPortal

DOI	10.1029/2020JC016079
	Sensitivity of the Baltic Sea Overturning Circulation to Long-Term Atmospheric and Hydrological Changes
	Placke M.; Meier H.E.M.; Neumann T.
发表日期	2021
ISSN	21699275
卷号	126 期号:3
英文摘要	The sensitivity of the overturning circulation in the Baltic Sea is analyzed with respect to long-term changes in atmospheric and hydrological conditions by using two state-of-the-art ocean circulation models: RCO (Rossby Centre Ocean model) with a reference simulation and various sensitivity experiments as well as MOM (Modular Ocean Model). Historical reconstructions since 1850 lasting for >150 years are considered in order to identify coherences between the overturning stream function and surface wind, river runoff, major Baltic inflows, salinity, and water temperature. Long-term time series are evaluated statistically for several subbasins of the Baltic Sea for the two different models and for the sensitivity experiments concerning the interannual, multidecadal, and centennial variability. We found that the simulated overturning circulation has a response time scale with respect to wind or runoff of around 30 years. The overturning circulation will decrease basin-wide under anomalous wind conditions which hamper the deep water flow within the Baltic Sea, under a warmer climate or when river runoff increases. However, a global sea level rise would reinforce the overturning circulation. Overall, multidecadal variations of the overturning circulation are anticorrelated to and caused by the wind parallel to the cross-section of the overturning circulation. They are not caused by river runoff and the coherence with major Baltic inflows is small. Hence, the overturning circulation does not act as a good proxy for major Baltic inflows. © 2021. The Authors.
英文关键词	Baltic Sea; climate variability; historical reconstruction; numerical modeling; overturning circulation; sensitivity experiments
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/186436
作者单位	Department of Physical Oceanography and Instrumentation, Leibniz Institute for Baltic Sea Research Warnemünde, Rostock, Germany; Department of Research and Development, Swedish Meteorological and Hydrological Institute, Norrköping, Sweden
推荐引用方式 GB/T 7714	Placke M.,Meier H.E.M.,Neumann T.. Sensitivity of the Baltic Sea Overturning Circulation to Long-Term Atmospheric and Hydrological Changes[J],2021,126(3).
APA	Placke M.,Meier H.E.M.,&Neumann T..(2021).Sensitivity of the Baltic Sea Overturning Circulation to Long-Term Atmospheric and Hydrological Changes.Journal of Geophysical Research: Oceans,126(3).
MLA	Placke M.,et al."Sensitivity of the Baltic Sea Overturning Circulation to Long-Term Atmospheric and Hydrological Changes".Journal of Geophysical Research: Oceans 126.3(2021).