The Role of Ocean Heat Transport in the Global Climate Response to Projected Arctic Sea Ice Loss
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作者:
Tomas, Robert A.
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Natl Ctr Atmospher Res, Climate & Global Dynam Div, POB 3000, Boulder, CO 80307 USANatl Ctr Atmospher Res, Climate & Global Dynam Div, POB 3000, Boulder, CO 80307 USA
Tomas, Robert A.
[1
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Deser, Clara
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Natl Ctr Atmospher Res, Climate & Global Dynam Div, POB 3000, Boulder, CO 80307 USANatl Ctr Atmospher Res, Climate & Global Dynam Div, POB 3000, Boulder, CO 80307 USA
Deser, Clara
[1
]
Sun, Lantao
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机构:
Univ Colorado Boulder, Cooperat Inst Res Environm Sci, Boulder, CO USA
NOAA, Earth Syst Res Lab, Boulder, CO USANatl Ctr Atmospher Res, Climate & Global Dynam Div, POB 3000, Boulder, CO 80307 USA
Sun, Lantao
[2
,3
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机构:
[1] Natl Ctr Atmospher Res, Climate & Global Dynam Div, POB 3000, Boulder, CO 80307 USA
[2] Univ Colorado Boulder, Cooperat Inst Res Environm Sci, Boulder, CO USA
The purpose of this study is to elucidate the individual and combined roles of thermodynamic and dynamic ocean-atmosphere coupling in the equilibrium global climate response to projected Arctic sea ice loss using a suite of experiments conducted with Community Climate System Model, version 4, at 18 latitude-longitude spatial resolution. The results highlight the contrasting spatial structures and partially compensating effects of thermodynamic and dynamic coupling. In combination, thermodynamic and dynamic coupling produce a response pattern that is largely symmetric about the equator, whereas thermodynamic coupling alone yields an antisymmetric response. The latter is characterized by an interhemispheric sea surface temperature (SST) gradient, with maximum warming at high northern latitudes decreasing toward the equator, which displaces the intertropical convergence zone (ITCZ) and Hadley circulation northward. In contrast, the fully coupled response shows enhanced warming at high latitudes of both hemispheres and along the equator; the equatorial warming is driven by anomalous ocean heat transport convergence and is accompanied by a narrow equatorward intensification of the northern and southern branches of the ITCZ. In both cases, the tropical precipitation response to Arctic sea ice loss feeds back onto the atmospheric circulation at midlatitudes via Rossby wave dynamics, highlighting the global interconnectivity of the coupled climate system. This study demonstrates the importance of ocean dynamics in mediating the equilibrium global climate response to Arctic sea ice loss.
机构:
Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA
Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Lab Climate & Ocean Atmosphere Studies, Beijing, Peoples R China
Civil Aviat Univ China, Dept Aviat Meteorol, Coll Air Traff Management, Tianjin, Peoples R ChinaNatl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA
Wang, Kun
Deser, Clara
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机构:
Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USANatl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA
Deser, Clara
Sun, Lantao
论文数: 0引用数: 0
h-index: 0
机构:
Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA
NOAA, Earth Syst Res Lab, Boulder, CO USANatl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA
Sun, Lantao
Tomas, Robert A.
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Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USANatl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA
机构:
Univ Calif Los Angeles, Atmospher & Ocean Sci Dept, Los Angeles, CA 90095 USAUniv Calif Los Angeles, Atmospher & Ocean Sci Dept, Los Angeles, CA 90095 USA
Boe, Julien
Hall, Alex
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机构:
Univ Calif Los Angeles, Atmospher & Ocean Sci Dept, Los Angeles, CA 90095 USAUniv Calif Los Angeles, Atmospher & Ocean Sci Dept, Los Angeles, CA 90095 USA
Hall, Alex
Qu, Xin
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机构:
Univ Calif Los Angeles, Atmospher & Ocean Sci Dept, Los Angeles, CA 90095 USAUniv Calif Los Angeles, Atmospher & Ocean Sci Dept, Los Angeles, CA 90095 USA
机构:
Atmospheric and Oceanic Sciences Department, University of California Los Angeles, CA 90095-1565Atmospheric and Oceanic Sciences Department, University of California Los Angeles, CA 90095-1565
Boé J.
Hall A.
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机构:
Atmospheric and Oceanic Sciences Department, University of California Los Angeles, CA 90095-1565Atmospheric and Oceanic Sciences Department, University of California Los Angeles, CA 90095-1565
Hall A.
Qu X.
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机构:
Atmospheric and Oceanic Sciences Department, University of California Los Angeles, CA 90095-1565Atmospheric and Oceanic Sciences Department, University of California Los Angeles, CA 90095-1565