DOI: 10.1175/JCLI-D-16-0396.1
Scopus记录号: 2-s2.0-85014564898
论文题名: Global and full-depth ocean temperature trends during the early twenty-first century from argo and repeat hydrography
作者: Desbruyères D. ; McDonagh E.L. ; King B.A. ; Thierry V.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 6 起始页码: 1985
结束页码: 1997
语种: 英语
Scopus关键词: Enthalpy
; Hydrology
; Navigation
; Ocean habitats
; Temperature
; Decadal variability
; Heat budgets/fluxes
; Southern Hemisphere
; Subtropical mode waters
; Temperature changes
; Temporal and spatial
; Trends
; Water mass
; Oceanography
; Argo
; climate change
; heat budget
; heat flux
; hydrographic survey
; sea surface temperature
; Southern Hemisphere
; trend analysis
; twenty first century
; water mass
; Atlantic Ocean
; Atlantic Ocean (North)
; Southern Ocean
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 ± 0.09 W m-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 2000 m 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. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49817
Appears in Collections: 气候变化事实与影响
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作者单位: National Oceanography Centre, Southampton, United Kingdom; IFREMER, Brest, France
Recommended Citation:
Desbruyères D.,McDonagh E.L.,King B.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,2017-01-01,30(6)