DOI: 10.1007/s00382-012-1556-0
Scopus记录号: 2-s2.0-84884699484
论文题名: Influence of tropical cyclones on sea surface temperature seasonal cycle and ocean heat transport
作者: Vincent E.M. ; Madec G. ; Lengaigne M. ; Vialard J. ; Koch-Larrouy A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 41, 期: 2017-07-08 起始页码: 2019
结束页码: 2038
语种: 英语
英文关键词: Ocean heat transport
; Seasonal cycle
; SST
; Tropical cyclones
英文摘要: Recent studies suggested that tropical cyclones (TCs) contribute significantly to the meridional oceanic heat transport by injecting heat into the subsurface through mixing. Here, we estimate the long-term oceanic impact of TCs by inserting realistic wind vortices along observed TCs tracks in a 1/2° resolution ocean general circulation model over the 1978-2007 period. Warming of TCs' cold wakes results in a positive heat flux into the ocean (oceanic heat uptake; OHU) of ~480 TW, consistent with most recent estimates. However, ~2/5 of this OHU only compensates the heat extraction by the TCs winds during their passage. Another ~2/5 of this OHU is injected in the seasonal thermocline and hence released back to the atmosphere during the following winter. Because of zonal compensations and equatorward transport, only one-tenth of the OHU is actually exported poleward (46 TW), resulting in a marginal maximum contribution of TCs to the poleward ocean heat transport. Other usually neglected TC-related processes however impact the ocean mean state. The residual Ekman pumping associated with TCs results in a sea-level drop (rise) in the core (northern and southern flanks) of TC-basins that expand westward into the whole basin as a result of planetary wave propagation. More importantly, TC-induced mixing and air-sea fluxes cool the surface in TC-basins during summer, while the re-emergence of subsurface warm anomalies warms it during winter. This leads to a ~10 % reduction of the sea surface temperature seasonal cycle within TCs basins, which may impact the climate system. © 2012 Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54759
Appears in Collections: 过去全球变化的重建
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作者单位: LOCEAN-IPSL, IRD/CNRS/UPMC/MNHN, tour 45-55 4e, 4, place Jussieu, 75252 Paris Cedex 5, France; NOC, Southampton, United Kingdom; LEGOS, IRD/CNRS/UPS, Toulouse, France
Recommended Citation:
Vincent E.M.,Madec G.,Lengaigne M.,et al. Influence of tropical cyclones on sea surface temperature seasonal cycle and ocean heat transport[J]. Climate Dynamics,2013-01-01,41(2017-07-08)