Future Evolution of an Eddy Rich Ocean Associated with Enhanced East Atlantic Storminess in a Coupled Model Projection
Future Evolution of an Eddy Rich Ocean Associated with Enhanced East Atlantic Storminess in a Coupled Model Projection
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DOI：
10.1029/2021gl092719
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发表时间：
2021-04-16
影响因子：
5.2
通讯作者：
Coward, Andrew C.
中科院分区：
文献类型：
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作者：
Grist, Jeremy P.;Josey, Simon A.;Coward, Andrew C.
在高分辨率海洋-大气耦合模式中，富含涡流的海洋提供的海气通量的改进表示可能会改变风暴的路径和强度及其对气候变化的响应。我们研究了在控制和气候变化（SSP585）中，从允许涡流（1/4度，HM）到涡流丰富（1/12度，HH）的海洋表面冬季海洋条件和风暴的变化，其中大气分辨率保持在25 km。北大西洋控制区气候的差异源于墨西哥湾流在富涡模型中的位置改变。预估结果显示，HH模式下西大西洋的变暖幅度大于HM模式，而东大西洋风暴的变化幅度是允许涡流模式下的6倍。这种增加与北大西洋变暖空洞的独特长期演变和富涡模式中的墨西哥湾流分离有关。
Improved representation of air-sea fluxes afforded by eddy-rich oceans in high-resolution coupled ocean-atmosphere models may modify the tracks and intensity of storms and their response to climate change. We examine changes in winter surface ocean conditions and storminess associated with moving from an eddy-permitting (1/4 degrees, HM) to an eddy-rich (1/12 degrees, HH) ocean in control and climate change (SSP585) simulations of the HadGEM3-GC3.1 model in which atmosphere resolution is kept at 25 km. Differences in North Atlantic climate in the control runs stem from a revised location of the Gulf Stream in the eddy-rich model. Projections reveal greater warming in the western Atlantic in HH than HM and a pronounced increase in eastern Atlantic storminess with changes six times greater than in the eddy-permitting model. This increase is associated with the distinctive long-term evolution of the North Atlantic warming hole and the Gulf Stream separation in the eddy-rich model.