globalchange  > 气候变化与战略
DOI: 10.1175/JCLI-D-17-0861.1
Scopus ID: 2-s2.0-85058811988
ENSO-Related global ocean heat content variations
Author: Wu Q.; Zhang X.; Church J.A.; Hu J.
Source Publication: Journal of Climate
ISSN: 8948755
Publishing Year: 2019
Volume: 32, Issue:1
pages begin: 45
pages end: 68
Language: 英语
Scopus Keyword: Atmospheric pressure ; Budget control ; Climatology ; Enthalpy ; Heat exchangers ; Heat flux ; Tropics ; Content variation ; Ocean heat content ; Planetary energy budget ; Quantitative result ; Redistribution process ; Southern oscillation ; Surface heat fluxes ; Vertical direction ; Oceanography ; air-sea interaction ; El Nino-Southern Oscillation ; energy budget ; global ocean ; heat flux ; heat transfer ; surface flux ; tropical environment
English Abstract: The modulation of the full-depth global integrated ocean heat content (GOHC) by El Niño-Southern Oscillation (ENSO) has been estimated in various studies. However, the quantitative results and the mechanisms at work remain uncertain. Here, a dynamically consistent ocean state estimate is utilized to study the large-scale integrated heat content variations during ENSO events for the global ocean. The full-depth GOHC exhibits a cooling tendency during the peak and decaying phases of El Niño, which is a result of the negative surface heat flux (SHF) anomaly in the tropics (30°S-30°N), partially offset by the positive SHF anomaly at higher latitudes. The tropical SHF anomaly acts as a lagged response to damp the convergence of oceanic heat transport, which redistributes heat from the extratropics and the subsurface layers (100-440 m) into the upper tropical oceans (0-100 m) during the onset and peak of El Niño. These results highlight the global nature of the oceanic heat redistribution during ENSO events, as well as how the redistribution process affects the full-depth GOHC. The meridional heat exchange across 30°S and 30°N is driven by ocean current anomalies, while multiple processes contribute to the vertical heat exchange across 100m simultaneously. Heat advection due to unbalanced mass transport is distinguished from the mass balanced one, with significant contributions from the meridional and zonal overturning cells being identified for the latter in the vertical direction. Results presented here have implications for monitoring the planetary energy budget and evaluating ENSO's global imprints on ocean heat content in different estimates. © 2018 American Meteorological Society.
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被引频次[WOS]:2   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
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Wu Q.,Zhang X.,Church J.A.,et al. ENSO-Related global ocean heat content variations[J]. Journal of Climate,2019-01-01,32(1)
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