气候变化领域集成服务门户(CCPortal): Origin of interannual variability in global mean sea level

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DOI	10.1073/pnas.1922190117
	Origin of interannual variability in global mean sea level
	Hamlington B.D.; Piecuch C.G.; Reager J.T.; Chandanpurkar H.; Frederikse T.; Nerem R.S.; Fasullo J.T.; Cheon S.-H.
发表日期	2020
ISSN	0027-8424
起始页码	13983
结束页码	13990
卷号	117 期号:25
英文摘要	The two dominant drivers of the global mean sea level (GMSL) variability at interannual timescales are steric changes due to changes in ocean heat content and barystatic changes due to the exchange of water mass between land and ocean. With Gravity Recovery and Climate Experiment (GRACE) satellites and Argo profiling floats, it has been possible to measure the relative steric and barystatic contributions to GMSL since 2004. While efforts to "close the GMSL budget" with satellite altimetry and other observing systems have been largely successful with regards to trends, the short time period covered by these records prohibits a full understanding of the drivers of interannual to decadal variability in GMSL. One particular area of focus is the link between variations in the El Niño-Southern Oscillation (ENSO) and GMSL. Recent literature disagrees on the relative importance of steric and barystatic contributions to interannual to decadal variability in GMSL. Here, we use a multivariate data analysis technique to estimate variability in barystatic and steric contributions to GMSL back to 1982. These independent estimates explain most of the observed interannual variability in satellite altimeter-measured GMSL. Both processes, which are highly correlated with ENSO variations, contribute about equally to observed interannual GMSL variability. A theoretical scaling analysis corroborates the observational results. The improved understanding of the origins of interannual variability in GMSL has important implications for our understanding of long-term trends in sea level, the hydrological cycle, and the planet's radiation imbalance. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Climate variability; Global mean sea level; Satellite altimetry; Sea level
语种	英语
scopus关键词	article; climate change; data analysis; El Nino; human; sea level; theoretical study
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160899
作者单位	Hamlington, B.D., Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States; Piecuch, C.G., Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Reager, J.T., Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States; Chandanpurkar, H., Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States; Frederikse, T., Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States; Nerem, R.S., Smead Aerospace Engineering Sciences, Colorado Center for Astrodynamics Research, University of Colorado, Boulder, CO 80309, United States; Fasullo, J.T., Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO 80301, United States; Cheon, S.-H., Ocean, Earth, and Atmospheric Sciences Department, Old Dominion University, Norfolk, VA 23529, United States
推荐引用方式 GB/T 7714	Hamlington B.D.,Piecuch C.G.,Reager J.T.,et al. Origin of interannual variability in global mean sea level[J],2020,117(25).
APA	Hamlington B.D..,Piecuch C.G..,Reager J.T..,Chandanpurkar H..,Frederikse T..,...&Cheon S.-H..(2020).Origin of interannual variability in global mean sea level.Proceedings of the National Academy of Sciences of the United States of America,117(25).
MLA	Hamlington B.D.,et al."Origin of interannual variability in global mean sea level".Proceedings of the National Academy of Sciences of the United States of America 117.25(2020).