气候变化领域集成服务门户(CCPortal): Global reconstruction of historical ocean heat storage and transport

CCPortal

DOI	10.1073/pnas.1808838115
	Global reconstruction of historical ocean heat storage and transport
	Zanna L.; Khatiwala S.; Gregory J.M.; Ison J.; Heimbach P.
发表日期	2019
ISSN	0027-8424
起始页码	1126
结束页码	1131
卷号	116 期号:4
英文摘要	Most of the excess energy stored in the climate system due to anthropogenic greenhouse gas emissions has been taken up by the oceans, leading to thermal expansion and sea-level rise. The oceans thus have an important role in the Earth’s energy imbalance. Observational constraints on future anthropogenic warming critically depend on accurate estimates of past ocean heat content (OHC) change. We present a reconstruction of OHC since 1871, with global coverage of the full ocean depth. Our estimates combine timeseries of observed sea surface temperatures with much longer historical coverage than those in the ocean interior together with a representation (a Green’s function) of time-independent ocean transport processes. For 1955–2017, our estimates are comparable with direct estimates made by infilling the available 3D time-dependent ocean temperature observations. We find that the global ocean absorbed heat during this period at a rate of 0.30 ± 0.06 W/m 2 in the upper 2,000 m and 0.028 ± 0.026 W/m 2 below 2,000 m, with large decadal fluctuations. The total OHC change since 1871 is estimated at 436 ± 91 × 10 21 J, with an increase during 1921–1946 (145 ± 62 × 10 21 J) that is as large as during 1990–2015. By comparing with direct estimates, we also infer that, during 1955–2017, up to one-half of the Atlantic Ocean warming and thermosteric sea-level rise at low latitudes to midlatitudes emerged due to heat convergence from changes in ocean transport. © 2019 National Academy of Sciences. All rights reserved.
英文关键词	Climate change; Earth’s energy imbalance; Ocean heat content; Ocean processes; Sea-level rise
语种	英语
scopus关键词	article; Atlantic Ocean; climate change; heat; latitude; sea level rise; sea surface temperature; storage; warming
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/160382
作者单位	Zanna, L., Department of Physics, University of Oxford, Oxford, OX1 3PU, United Kingdom; Khatiwala, S., Department of Earth Sciences, University of Oxford, Oxford, OX1 3AN, United Kingdom; Gregory, J.M., Met Office Hadley Centre, Exeter, EX1 3PB, United Kingdom, National Centre for Atmospheric Science–, Climate, University of Reading, Reading, RG6 6BB, United Kingdom; Ison, J., Department of Physics, University of Oxford, Oxford, OX1 3PU, United Kingdom; Heimbach, P., Institute for Computational Engineering and Sciences, University of Texas at Austin, Austin, TX 78712, United States, Jackson School of Geosciences, University of Texas at Austin, Austin, TX 78712, United States
推荐引用方式 GB/T 7714	Zanna L.,Khatiwala S.,Gregory J.M.,et al. Global reconstruction of historical ocean heat storage and transport[J],2019,116(4).
APA	Zanna L.,Khatiwala S.,Gregory J.M.,Ison J.,&Heimbach P..(2019).Global reconstruction of historical ocean heat storage and transport.Proceedings of the National Academy of Sciences of the United States of America,116(4).
MLA	Zanna L.,et al."Global reconstruction of historical ocean heat storage and transport".Proceedings of the National Academy of Sciences of the United States of America 116.4(2019).