GSTDTAP  > 气候变化
DOI10.1175/JCLI-D-16-0396.1
Global and Full-Depth Ocean Temperature Trends during the Early Twenty-First Century from Argo and Repeat Hydrography
Desbruyeres, Damien1; Mcdonagh, Elaine L.1; King, Brian A.1; Thierry, Virginie2
2017-03-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2017
卷号30期号:6
文章类型Article
语种英语
国家England; France
英文摘要

The early twenty-first century's warming trend of the full-depth global ocean is calculated by combining the analysis of Argo (top 2000 m) and repeat hydrography into a blended full-depth observing system. The surface-to-bottom temperature change over the last decade of sustained observation is equivalent to a heat uptake of 0.71 +/- 0.09Wm(-2) applied over the surface of Earth, 90% of it being found above 2000-m depth. The authors decompose the temperature trend pointwise into changes in isopycnal depth (heave) and temperature changes along an isopycnal (spiciness) to describe the mechanisms controlling the variability. The heave component dominates the global heat content increase, with the largest trends found in the Southern Hemisphere's extratropics (0-2000 m) highlighting a volumetric increase of subtropical mode waters. Significant heave-related warming is also found in the deep North Atlantic and Southern Oceans (2000-4000 m), reflecting a potential decrease in deep water mass renewal rates. The spiciness component shows its strongest contribution at intermediate levels (700-2000 m), with striking localized warming signals in regions of intense vertical mixing (North Atlantic and Southern Oceans). Finally, the agreement between the independent Argo and repeat hydrography temperature changes at 2000m provides an overall good confidence in the blended heat content evaluation on global and ocean scales but also highlights basin-scale discrepancies between the two independent estimates. Those mismatches are largest in those basins with the largest heave signature (Southern Ocean) and reflect both the temporal and spatial sparseness of the hydrography sampling.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000395765900008
WOS关键词NORTH-ATLANTIC OCEAN ; NORTHEASTERN ATLANTIC ; CLIMATE-CHANGE ; HEAT-CONTENT ; CIRCULATION ; PACIFIC ; TRANSPORTS ; MODEL
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/20789
专题气候变化
作者单位1.Natl Oceanography Ctr, Southampton, Hants, England;
2.IFREMER, Brest, France
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GB/T 7714
Desbruyeres, Damien,Mcdonagh, Elaine L.,King, Brian A.,et al. Global and Full-Depth Ocean Temperature Trends during the Early Twenty-First Century from Argo and Repeat Hydrography[J]. JOURNAL OF CLIMATE,2017,30(6).
APA Desbruyeres, Damien,Mcdonagh, Elaine L.,King, Brian A.,&Thierry, Virginie.(2017).Global and Full-Depth Ocean Temperature Trends during the Early Twenty-First Century from Argo and Repeat Hydrography.JOURNAL OF CLIMATE,30(6).
MLA Desbruyeres, Damien,et al."Global and Full-Depth Ocean Temperature Trends during the Early Twenty-First Century from Argo and Repeat Hydrography".JOURNAL OF CLIMATE 30.6(2017).
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