남극해 해면수온의 상승이 편서풍의 변동과 관련이 있는가?

DC Field Value Language
dc.contributor.author 김용선 -
dc.contributor.author 장찬주 -
dc.date.accessioned 2020-07-16T02:33:49Z -
dc.date.available 2020-07-16T02:33:49Z -
dc.date.created 2020-02-11 -
dc.date.issued 2014-11-07 -
dc.identifier.uri https://sciwatch.kiost.ac.kr/handle/2020.kiost/25780 -
dc.description.abstract The Southern Hemisphere westerly winds have been intensified and shifted toward Antarctica during past few decades. The wind changes have been widely known to contribute to warming in the Southern Ocean through either southward shifts of the Antarctic Circumpolar Current (ACC) or enhanced southward eddy fluxes. In this study, we aim to investigate the contribution of the wind changes to SST trends by analyzing an AVHRR-based sea surface temperature dataset during the last three decades. A distinct difference in SST trends is observed between Subtropic and ACC regions. On a long-term timescale, a negligible trend with year-to-year perturbations in the ACC contrasts with a persistent warming trend by 0.15±0.08°C per decade throughout subtropics. The intensified winds, as an instantaneous influence, contribute to a broad warming over the subtropics, while the winds lead to a slight cooling trend in the ACC. Collectively, at most 8% of the SST trend is accountable as a direct response of the wind system changes. Localized warming over the Southeast Indian and Atlantic sectors of the ACC offsets the wind-driven broad cooling trend in the ACC region, indicating that this warming is determined largely by a localized oceanic mechanism. It is hypothesized that the poleward expansion of the Indo-Atlantic supergyre might lead to the localized warming.e Antarctic Circumpolar Current (ACC) or enhanced southward eddy fluxes. In this study, we aim to investigate the contribution of the wind changes to SST trends by analyzing an AVHRR-based sea surface temperature dataset during the last three decades. A distinct difference in SST trends is observed between Subtropic and ACC regions. On a long-term timescale, a negligible trend with year-to-year perturbations in the ACC contrasts with a persistent warming trend by 0.15±0.08°C per decade throughout subtropics. The intensified winds, as an instantaneous influence, contribute to a broad warming over the subtropics, while the winds lead to a slight cooling trend in the ACC. Collectively, at most 8% of the SST trend is accountable as a direct response of the wind system changes. Localized warming over the Southeast Indian and Atlantic sectors of the ACC offsets the wind-driven broad cooling trend in the ACC region, indicating that this warming is determined largely by a localized oceanic mechanism. It is hypothesized that the poleward expansion of the Indo-Atlantic supergyre might lead to the localized warming. -
dc.description.uri 2 -
dc.language English -
dc.publisher 해양학회 -
dc.relation.isPartOf 2014추계해양학회 -
dc.title 남극해 해면수온의 상승이 편서풍의 변동과 관련이 있는가? -
dc.title.alternative Is Southern Ocean sea surface warming linked with changes in the westerlies? -
dc.type Conference -
dc.citation.conferencePlace KO -
dc.citation.endPage 19 -
dc.citation.startPage 19 -
dc.citation.title 2014추계해양학회 -
dc.identifier.bibliographicCitation 2014추계해양학회, pp.19 -
dc.description.journalClass 2 -
Appears in Collections:
Marine Environmental & Climate Research Division > Ocean Circulation Research Center > 2. Conference Papers
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