气候变化领域集成服务门户(CCPortal): Linking Ocean Forcing and Atmospheric Interactions to Atlantic Multidecadal Variability in MPI-ESM1.2

CCPortal

DOI	10.1029/2020GL087259
	Linking Ocean Forcing and Atmospheric Interactions to Atlantic Multidecadal Variability in MPI-ESM1.2
	Oelsmann J.; Borchert L.; Hand R.; Baehr J.; Jungclaus J.H.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:10
英文摘要	We investigate how ocean-driven multidecadal sea surface temperature (SST) variations force the atmosphere to jointly set the pace of Atlantic multidecadal variability (AMV). We generate periodic low-frequency Atlantic Meridional Overturning Circulation oscillations by implementing time-dependent deep-ocean-density restoring in MPI-ESM1.2 to explicitly identify variations driven by Atlantic Meridional Overturning Circulation without any perturbation at the ocean-atmosphere interface. We show in a coupled experiment that ocean heat convergence variations generate positive SST anomalies, turbulent heat release, and low sea level pressure in the subpolar North Atlantic (NA) and vice versa. The SST signal is communicated to the tropical NA by wind-evaporative-SST feedbacks and to the North-East Atlantic by enhanced northward atmospheric heat transport. Such atmospheric feedbacks and the characteristic AMV-SST pattern are synchronized to the multidecadal time scale of ocean circulation changes by air-sea heat exchange. This coupled ocean-atmosphere mechanism is consistent with observed features of AMV and thus supports a key role of ocean dynamics in driving the AMV. ©2020. The Authors.
英文关键词	Sea level; Surface waters; Atlantic meridional overturning circulations; Atmospheric feedbacks; Atmospheric interaction; Multi-decadal time scale; Multidecadal variability; North East Atlantic; Sea surface temperature (SST); Subpolar North Atlantic; Atmospheric movements; air-sea interaction; atmospheric forcing; convergence; meridional circulation; perturbation; sea level pressure; sea surface temperature; Atlantic Ocean; Atlantic Ocean (Northeast)
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/170354
作者单位	Max Planck Institute for Meteorology, Hamburg, Germany; Deutsches Geodätisches Forschungsinstitut der Technischen Universität München, Munich, Germany; Institute for Oceanography, Center for Earth System Research and Sustainability (CEN), Universität Hamburg, Hamburg, Germany; Sorbonne Universités (SU/CNRS/IRD/MNHN), LOCEAN Laboratory, Institut Pierre Simon Laplace (IPSL), Paris, France; Geographical Institute, University of Bern, Bern, Germany; Oeschger Centre for Climate Research, University of Bern, Bern, Germany
推荐引用方式 GB/T 7714	Oelsmann J.,Borchert L.,Hand R.,et al. Linking Ocean Forcing and Atmospheric Interactions to Atlantic Multidecadal Variability in MPI-ESM1.2[J],2020,47(10).
APA	Oelsmann J.,Borchert L.,Hand R.,Baehr J.,&Jungclaus J.H..(2020).Linking Ocean Forcing and Atmospheric Interactions to Atlantic Multidecadal Variability in MPI-ESM1.2.Geophysical Research Letters,47(10).
MLA	Oelsmann J.,et al."Linking Ocean Forcing and Atmospheric Interactions to Atlantic Multidecadal Variability in MPI-ESM1.2".Geophysical Research Letters 47.10(2020).