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Impact of freshwater discharge from the Greenland ice sheet on North Atlantic climate variability

Cited 3 time in wos
Cited 3 time in scopus

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dc.contributor.authorAn, Soon-Il-
dc.contributor.authorKim, Hyerim-
dc.contributor.authorKim, Baek-Min-
dc.date.accessioned2021-11-29T05:08:07Z-
dc.date.available2021-11-29T05:08:07Z-
dc.date.issued2013-04-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/13023-
dc.description.abstractUsing a coupled ocean-atmosphere general circulation model, we investigated the impact of Greenland ice sheet melting on North Atlantic climate variability. The positive-degree day (PDD) method was incorporated into the model to control continental ice melting (PDD run). Models with and without the PDD method produce a realistic pattern of North Atlantic sea surface temperature (SST) variability that fluctuates from decadal to multidecadal periods. However, the interdecadal variability in PDD run is significantly dominated in the longer time scale compared to that in the run without PDD method. The main oscillatory feature in these experiments likely resembles the density-driven oscillatory mode. A reduction in the ocean density over the subpolar Atlantic results in suppression of the Atlantic Meridional Overturning Circulation (AMOC), leading to a cold SST due to a weakening of northward heat transport. The decreased surface evaporation associated with the cold SST further reduces the ocean density and thus, simultaneously acts as a positive feedback mechanism. The southward meridional current associated with the suppressed AMOC causes a positive tendency in the ocean density through density advection, which accounts for the phase transition of this oscillatory mode. The Greenland ice melting process reduces the mean meridional current and meridional density gradient because of additional fresh water flux, which suppress the delayed negative feedback due to meridional density advection. As a result, the oscillation period becomes longer and the transition is more delayed.en_US
dc.languageEnglishen_US
dc.language.isoenen_US
dc.subjectMeteorology & Atmospheric Sciencesen_US
dc.titleImpact of freshwater discharge from the Greenland ice sheet on North Atlantic climate variabilityen_US
dc.title.alternative기후변화에 따른 그린랜드로부터의 담수 유입이 북대서양 기후변동성에 미치는 영향en_US
dc.typeArticleen_US
dc.identifier.bibliographicCitationAn, Soon-Il, Kim, Hyerim, Kim, Baek-Min. 2013. "Impact of freshwater discharge from the Greenland ice sheet on North Atlantic climate variability". <em>THEORETICAL AND APPLIED CLIMATOLOGY</em>, 112(1-2): 29-43.-
dc.citation.titleTHEORETICAL AND APPLIED CLIMATOLOGYen_US
dc.citation.volume112en_US
dc.citation.number1-2en_US
dc.identifier.doi10.1007/s00704-012-0699-6-
dc.citation.startPage29en_US
dc.citation.endPage43en_US
dc.description.articleClassificationSCI-
dc.description.jcrRateJCR 2010:47.05882352941176en_US
dc.subject.keywordMERIDIONAL OVERTURNING CIRCULATIONen_US
dc.subject.keywordSURFACE-TEMPERATUREen_US
dc.subject.keywordDECADAL VARIABILITYen_US
dc.subject.keywordOCEANen_US
dc.subject.keywordOSCILLATIONen_US
dc.subject.keywordMODELSen_US
dc.subject.keywordEXTENTen_US
dc.identifier.localId2012-0517-
dc.identifier.scopusid2-s2.0-84875378319-
dc.identifier.wosid000316574700003-
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2012 Polar Academic Program (PD12010)
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