气候变化领域集成服务门户(CCPortal): Constraining 20th-Century Sea-Level Rise in the South Atlantic Ocean

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DOI	10.1029/2020JC016970
	Constraining 20th-Century Sea-Level Rise in the South Atlantic Ocean
	Frederikse T.; Adhikari S.; Daley T.J.; Dangendorf S.; Gehrels R.; Landerer F.; Marcos M.; Newton T.L.; Rush G.; Slangen A.B.A.; Wöppelmann G.
发表日期	2021
ISSN	21699275
卷号	126 期号:3
英文摘要	Sea level in the South Atlantic Ocean has only been measured at a small number of tide-gauge locations, which causes considerable uncertainty in 20th-century sea-level trend estimates in this basin. To obtain a better-constrained sea-level trend in the South Atlantic Ocean, this study aims to answer two questions. The first question is: can we combine new observations, vertical land motion estimates, and information on spatial sampling biases to obtain a likely range of 20th-century sea-level rise in the South Atlantic? We combine existing observations with recovered observations from Dakar and a high-resolution sea-level reconstruction based on salt-marsh sediments from the Falkland Islands and find that the rate of sea-level rise in the South Atlantic has likely been between 1.1 and 2.2 mm year−1 (5%–95% confidence intervals), with a central estimate of 1.6 mm year−1. This rate is on the high side, but not statistically different compared to global-mean trends from recent reconstructions. The second question is: are there any physical processes that could explain a large deviation from the global-mean sea-level trend in the South Atlantic? Sterodynamic (changes in ocean dynamics and steric effects) and gravitation, rotation, and deformation effects related to ice mass loss and land water storage have probably led to a 20th-century sea-level trend in the South Atlantic above the global mean. Both observations and physical processes thus suggest that 20th-century sea-level rise in the South Atlantic has been about 0.3 mm year−1 above the rate of global-mean sea-level rise, although even with the additional observations, the uncertainties are still too large to distinguish a statistically significant difference. © 2021. Jet Propulsion Laboratory, California Institute of Technology. Government sponsorship acknowledged.
英文关键词	data rescue; salt-marsh proxies; sea-level changes; South Atlantic; tide gauges
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/186430
作者单位	Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; School of Geography, Earth and Environmental Sciences, Plymouth University, Plymouth, United Kingdom; Old Dominion University, Norfolk, VA, United States; University of Siegen, Siegen, Germany; Department of Environment and Geography, University of York, York, United Kingdom; IMEDEA (UIB-CSIC), Esporles, Spain; Department of Physics, University of the Balearic Islands, Palma, Spain; Department of Estuarine and Delta Systems, NIOZ Royal Netherlands Institute for Sea Research, Utrecht University, Yerseke, Netherlands; LIENSs, Université de La Rochelle – CNRS, La Rochelle, France
推荐引用方式 GB/T 7714	Frederikse T.,Adhikari S.,Daley T.J.,et al. Constraining 20th-Century Sea-Level Rise in the South Atlantic Ocean[J],2021,126(3).
APA	Frederikse T..,Adhikari S..,Daley T.J..,Dangendorf S..,Gehrels R..,...&Wöppelmann G..(2021).Constraining 20th-Century Sea-Level Rise in the South Atlantic Ocean.Journal of Geophysical Research: Oceans,126(3).
MLA	Frederikse T.,et al."Constraining 20th-Century Sea-Level Rise in the South Atlantic Ocean".Journal of Geophysical Research: Oceans 126.3(2021).