气候变化领域集成服务门户(CCPortal): Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S

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DOI	10.1029/2020JC016947
	Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S
	Kersalé M.; Meinen C.S.; Perez R.C.; Piola A.R.; Speich S.; Campos E.J.D.; Garzoli S.L.; Ansorge I.; Volkov D.L.; Le Hénaff M.; Dong S.; Lamont T.; Sato O.T.; van den Berg M.
发表日期	2021
ISSN	21699275
卷号	126 期号:5
英文摘要	Variations in the mass and heat transported by the meridional overturning circulation (MOC) have important, well-documented, influences on global and regional climate, weather, ecosystems, and coastal sea levels. However, continuous, high-frequency, observations of these quantities have been limited to date. Multiple years of full-depth daily observations from moored instruments in the South Atlantic at 34.5°S are combined with satellite observations to resolve the volume transports in both the upper and abyssal MOC cells, and the associated full-depth meridional heat transport (MHT), on daily to interannual timescales. A newly developed method for combining satellite sea level observations with historical hydrographic measurements was used to estimate daily full-depth ocean profiles of temperature in the ocean interior where mooring coverage is sparse. The average MHT during 2013–2017 is 0.5 PW, with a daily standard deviation of 0.8 PW. The MHT variability is most strongly driven by the geostrophic relative velocity contributions (horizontal density-gradient changes). This variability is highly correlated with the volume transport variability of the MOC upper cell (r = 0.96) and modestly anti-correlated (r = −0.52) with the abyssal cell variations. An empirical relationship between the MHT and MOC values was developed allowing the reconstruction of a longer MHT time series including the pilot array period (2009–2010). Seasonal variation of the MHT is significant, and results from strong variations of all terms (Ekman, barotropic, and baroclinic). Although the 2013–2017 shows an increasing MHT trend (0.14 PW/year), the longer time period record suggests that the apparent trend may simply be interannual modulation of MHT at 34.5°S. © 2021. American Geophysical Union. All Rights Reserved. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
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/186301
作者单位	Cooperative Institute for Marine and Atmospheric Studies, University of Miami, Miami, FL, United States; NOAA Atlantic Oceanographic and Meteorological Laboratory, Miami, FL, United States; Servicio de Hidrografía Naval, Buenos Aires, Argentina; Instituto Franco-Argentino sobre Estudio del Clima y sus Impactos (UMI-IFAECI/CNRS-CONICET-UBA), Buenos Aires, Argentina; Universidad de Buenos Aires, Buenos Aires, Argentina; Laboratoire de Météorologie Dynamique–IPSL, Ecole Normale Supérieure, Paris, France; Oceanographic Institute, University of São Paulo, São Paulo, Brazil; Department of Biology, Chemistry and Environmental Sciences, School of Arts and Sciences, American University of Sharjah, Sharjah, United Arab Emirates; Department of Oceanography, University of Cape Town, Rondebosch, South Africa; Department of Environment, Forestry and Fisheries, Oceans and Coasts Research Branch, Cape Town, South Africa; Bayworld Centre for Research and Education, Cape Town, South Africa
推荐引用方式 GB/T 7714	Kersalé M.,Meinen C.S.,Perez R.C.,et al. Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S[J],2021,126(5).
APA	Kersalé M..,Meinen C.S..,Perez R.C..,Piola A.R..,Speich S..,...&van den Berg M..(2021).Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S.Journal of Geophysical Research: Oceans,126(5).
MLA	Kersalé M.,et al."Multi-Year Estimates of Daily Heat Transport by the Atlantic Meridional Overturning Circulation at 34.5°S".Journal of Geophysical Research: Oceans 126.5(2021).