Impact of the GeoMIP G1 sunshade geoengineering experiment on the Atlantic meridional overturning circulation
Impact of the GeoMIP G1 sunshade geoengineering experiment on the Atlantic meridional overturning circulation
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GeoMIP G1遮阳地球工程实验对大西洋经向翻转环流的影响
DOI：
10.1088/1748-9326/aa5fb8
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发表时间：
2017-03
影响因子：
6.7
通讯作者：
Moore JC
中科院分区：
文献类型：
--
作者：
Hong Yu;Moore John C.;Ji Duoying;Zhao Liyun;Jevrejeva Svetlana;Phipps Steven J.;Tilmes Simone;Tilmes Simone;Watanabe Shingo;Moore JC
我们分析了地球工程模型比对项目的理想太阳辐射管理场景 (G1) 下海洋温度和大西洋经向翻转环流 (AMOC) 的多地球系统模型响应。尽管地球工程大大抵消了全球平均海洋温度的增加，但所有模型都模拟了北大西洋北部相对于没有地球工程的变暖。北大西洋表面（∼0.25 K）和500 m深度（∼0.10 K）温度的升高主要是由于从海洋到大气的总热通量减少了10 Wm−2。虽然AMOC在太阳调光场景下G1略有减少，但相对piControl，它比突变4×CO2下强约37%。 G1下AMOC的减少主要是对北大西洋北部热通量变化的响应，而不是对水通量和风应力变化的响应。 AMOC将热量从热带转移到高纬度地区，有助于使高纬度地区变暖，并且其强度在太阳变暗的情况下得以维持，而不是因温室气体强迫单独作用而减弱。因此，太阳辐射地球工程导致的高纬度海洋温度相对降低，往往会被相应活跃的AMOC环流所抵消，AMOC环流进一步将温暖的表层海水输送到格陵兰冰盖，使北极海冰和永久冻土变暖。
We analyze the multi-earth system model responses of ocean temperatures and the Atlantic Meridional Overturning Circulation (AMOC) under an idealized solar radiation management scenario (G1) from the Geoengineering Model Intercomparison Project. All models simulate warming of the northern North Atlantic relative to no geoengineering, despite geoengineering substantially offsetting the increases in mean global ocean temperatures. Increases in the temperature of the North Atlantic Ocean at the surface (∼0.25 K) and at a depth of 500 m (∼0.10 K) are mainly due to a 10 Wm−2 reduction of total heat flux from ocean to atmosphere. Although the AMOC is slightly reduced under the solar dimming scenario, G1, relative to piControl, it is about 37% stronger than under abrupt4 × CO2. The reduction of the AMOC under G1 is mainly a response to the heat flux change at the northern North Atlantic rather than to changes in the water flux and the wind stress. The AMOC transfers heat from tropics to high latitudes, helping to warm the high latitudes, and its strength is maintained under solar dimming rather than weakened by greenhouse gas forcing acting alone. Hence the relative reduction in high latitude ocean temperatures provided by solar radiation geoengineering, would tend to be counteracted by the correspondingly active AMOC circulation which furthermore transports warm surface waters towards the Greenland ice sheet, warming Arctic sea ice and permafrost.
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DOI：
--
发表时间：
2010-09
期刊：
European Economics: Agriculture
影响因子：
--
作者：
G. Davies
通讯作者：
G. Davies
影响因子：
5.1
作者：
S. Phipps;L. Rotstayn;H. Gordon;J. Roberts;A. Hirst;W. Budd
通讯作者：
S. Phipps;L. Rotstayn;H. Gordon;J. Roberts;A. Hirst;W. Budd
影响因子：
5.2
作者：
Robock, Alan;Marquardt, Allison;Stenchikov, Georgiy
通讯作者：
Stenchikov, Georgiy
影响因子：
4.9
作者：
Gent, Peter R.;Danabasoglu, Gokhan;Zhang, Minghua
通讯作者：
Zhang, Minghua
影响因子：
5.2
作者：
Dai, A;Wigley, TML;Washington, WM
通讯作者：
Washington, WM