Global and Arctic climate engineering: numerical model studies
Global and Arctic climate engineering: numerical model studies
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DOI：
10.1098/rsta.2008.0132
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发表时间：
2008-11-13
期刊：
影响因子：
5
通讯作者：
Wood, Lowell
中科院分区：
文献类型：
--
作者：
Caldeira, Ken;Wood, Lowell
我们对大气、海冰和上层海洋进行数值模拟，以研究入射太阳辐射、日照减少对气候系统的可能影响。我们模拟了全球和北极气候工程在理想化的情况下，在大气层顶部以上的日照减少。我们考虑北极情景，因为气候变化在那里表现得最强烈。我们的研究结果表明，虽然这种简单的日照调制不太可能完全逆转温室气体变暖的影响，但在考虑温度和水的广泛措施下，工程化的高CO2气候可以比没有这种工程的高CO2气候更类似于低CO2气候。在高纬度地区，每单位太阳光的反射量较少，但气候系统的反馈作用更强。这两种效应在很大程度上相互抵消，使得每单位大气层顶的全球平均温度响应对纬度变化相对不敏感。实施日照调制似乎是可行的。
We perform numerical simulations of the atmosphere, sea ice and upper ocean to examine possible effects of diminishing incoming solar radiation, insolation, on the climate system. We simulate both global and Arctic climate engineering in idealized scenarios in which insolation is diminished above the top of the atmosphere. We consider the Arctic scenarios because climate change is manifesting most strongly there. Our results indicate that, while such simple insolation modulation is unlikely to perfectly reverse the effects of greenhouse gas warming, over a broad range of measures considering both temperature and water, an engineered high CO2 climate can be made much more similar to the low CO2 climate than would be a high CO2 climate in the absence of such engineering. At high latitudes, there is less sunlight deflected per unit albedo change but climate system feedbacks operate more powerfully there. These two effects largely cancel each other, making the global mean temperature response per unit top-of-atmosphere albedo change relatively insensitive to latitude. Implementing insolation modulation appears to be feasible.