气候变化领域集成服务门户(CCPortal): Solar impacts on decadal variability of tropopause temperature and lower stratospheric (LS) water vapour: a mechanism through ocean

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DOI	10.1007/s00382-018-4464-0
	Solar impacts on decadal variability of tropopause temperature and lower stratospheric (LS) water vapour: a mechanism through ocean–atmosphere coupling
	Wang W.; Matthes K.; Tian W.; Park W.; Shangguan M.; Ding A.
发表日期	2019
ISSN	0930-7575
起始页码	5585
结束页码	5604
卷号	52 期号:2020-09-10
英文摘要	Solar signals in the atmosphere and the ocean, especially in tropopause temperatures and lower stratospheric water vapour are investigated using recent observational and reanalyses data sets for the period from 1958 through 2013. Previous observational and modeling studies demonstrated solar influences in the lower stratosphere resembling a positive Northern Annular Mode due to the top-down mechanism involving enhanced solar UV radiation in the stratosphere during solar maxima and dynamical amplification mechanisms in the atmosphere. We found that these stratospheric changes might propagate down to the troposphere and become zonally asymmetric with characteristic pressure and wind pattern over the North Atlantic and North Pacific. Such changes in tropospheric circulation are related to anomalous positive SST anomalies in the central Pacific which resemble an El Niño Modoki event. We show for the first time with ocean reanalysis data that these SST anomalies are amplified by a positive feedback through oceanic subsurface currents and heat transport in the equatorial Pacific. Anomalous warm SSTs in the equatorial central Pacific change the zonal SST gradient and lead to anomalous westerly winds and currents in the western Pacific and easterly winds and currents in the eastern Pacific. This indicates a convergence and less upwelling and therefore enhances the positive SST anomalies in the equatorial central Pacific. Such a positive feedback results in a peak of El Niño Modoki events about 2 years after the solar maximum. These solar-induced signals in the ocean in turn modify the circulation and convection in the troposphere, resulting in lagged solar signals of anomalous high tropopause heights and negative anomalies in tropopause temperatures as well as in lower stratospheric water vapour over the equatorial Pacific which are in agreement with a time evolving solar-induced El Niño Modoki-like SST pattern. We demonstrate a solar modulation of intrinsic decadal climate variability over the Pacific which is amplified by positive feedbacks between the ocean and the atmosphere. © 2018, The Author(s).
英文关键词	11-Year solar cycle; Decadal variability; Lower stratospheric (LS)water vapour; Sea surface temperature (SST); TropoPause temperature (TPT)
语种	英语
scopus关键词	air temperature; atmosphere-ocean coupling; decadal variation; sea surface temperature; solar cycle; stratosphere; tropopause; water vapor; Atlantic Ocean; Atlantic Ocean (North); Pacific Ocean; Pacific Ocean (North)
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146299
作者单位	Institute for Climate and Global Change Research, School of Atmospheric Sciences, Nanjing University, Nanjing, China; Joint International Research Laboratory of Atmospheric and Earth System Sciences (JirLATEST), Nanjing University, Nanjing, China; Collaborative Innovation Center of Climate Change, Nanjing, Jiangsu, China; GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany; Christian-Albrechts-Universität zu Kiel, Kiel, Germany; College of Atmospheric Sciences, Lanzhou University, Lanzhou, China; School of Transportation, Southeast University, Nanjing, China
推荐引用方式 GB/T 7714	Wang W.,Matthes K.,Tian W.,等. Solar impacts on decadal variability of tropopause temperature and lower stratospheric (LS) water vapour: a mechanism through ocean–atmosphere coupling[J],2019,52(2020-09-10).
APA	Wang W.,Matthes K.,Tian W.,Park W.,Shangguan M.,&Ding A..(2019).Solar impacts on decadal variability of tropopause temperature and lower stratospheric (LS) water vapour: a mechanism through ocean–atmosphere coupling.Climate Dynamics,52(2020-09-10).
MLA	Wang W.,et al."Solar impacts on decadal variability of tropopause temperature and lower stratospheric (LS) water vapour: a mechanism through ocean–atmosphere coupling".Climate Dynamics 52.2020-09-10(2019).