气候变化领域集成服务门户(CCPortal): Can We Resolve the Basin-Scale Sea Level Trend Budget From GRACE Ocean Mass?

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DOI	10.1029/2019JC015535
	Can We Resolve the Basin-Scale Sea Level Trend Budget From GRACE Ocean Mass?
	Royston S.; Vishwakarma B.D.; Westaway R.; Rougier J.; Sha Z.; Bamber J.
发表日期	2020
ISSN	21699275
卷号	125 期号:1
英文摘要	Understanding sea level changes at a regional scale is important for improving local sea level projections and coastal management planning. Sea level budget (SLB) estimates derived from the sum of observation of each component close for the global mean. The sum of steric and Gravity Recovery and Climate Experiment (GRACE) ocean mass contributions to sea level calculated from measurements does not match the spatial patterns of sea surface height trends from satellite altimetry at 1° grid resolution over the period 2005–2015. We investigate potential drivers of this mismatch aggregating to subbasin regions and find that the steric plus GRACE ocean mass observations do not represent the small-scale features seen in the satellite altimetry. In addition, there are discrepancies with large variance apparent at the global and hemispheric scale. Thus, the SLB closure on the global scale to some extent represents a cancelation of errors. The SLB is also sensitive to the glacial isostatic adjustment correction for GRACE and to altimery orbital altitude. Discrepancies in the SLB are largest for the Indian-South Pacific Ocean region. Taking the spread of plausible sea level trends, the SLB closes at the ocean-basin scale (2σ) but with large spread of magnitude, one third or more of the trend signal. Using the most up-to-date observation products, our ocean-region SLB does not close everywhere, and consideration of systematic uncertainties diminishes what information can be gained from the SLB about sea level processes, quantifying contributions, and validating Earth observation systems. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	regional sea level; sea level; sea level budget
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/187033
作者单位	School of Geographical Sciences, University of Bristol, Bristol, United Kingdom; School of Mathematical Sciences, University of Bristol, Bristol, United Kingdom
推荐引用方式 GB/T 7714	Royston S.,Vishwakarma B.D.,Westaway R.,et al. Can We Resolve the Basin-Scale Sea Level Trend Budget From GRACE Ocean Mass?[J],2020,125(1).
APA	Royston S.,Vishwakarma B.D.,Westaway R.,Rougier J.,Sha Z.,&Bamber J..(2020).Can We Resolve the Basin-Scale Sea Level Trend Budget From GRACE Ocean Mass?.Journal of Geophysical Research: Oceans,125(1).
MLA	Royston S.,et al."Can We Resolve the Basin-Scale Sea Level Trend Budget From GRACE Ocean Mass?".Journal of Geophysical Research: Oceans 125.1(2020).