Quantifying the temperature-independent effect of stratospheric aerosol geoengineering on global-mean precipitation in a multi-model ensemble
Quantifying the temperature-independent effect of stratospheric aerosol geoengineering on global-mean precipitation in a multi-model ensemble
复制标题
量化多模式集合中平流层气溶胶地球工程对全球平均降水的与温度无关的影响
DOI：
10.1088/1748-9326/11/3/034012
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发表时间：
2016
影响因子：
6.7
通讯作者：
Ferraro A
中科院分区：
文献类型：
--
作者：
Ferraro A
The reduction in global-mean precipitation when stratospheric aerosol geoengineering is used to counterbalance global warming from increasing carbon dioxide (CO 2) concentrations has been mainly attributed to the temperature-independent effect of CO 2 on atmospheric radiative cooling. We demonstrate here that stratospheric sulphate aerosol itself also acts to reduce global-mean precipitation independent of its effects on temperature. The temperature-independent effect of stratospheric aerosol geoenginering on global-mean precipitation is calculated by removing temperature-dependent effects from climate model simulations of the Geoengineering Model Intercomparison Project (GeoMIP). When sulphate aerosol is injected into the stratosphere at a rate of 5 Tg SO 2 per year the aerosol reduces global-mean precipitation by approximately 0.2%, though multiple ensemble members are required to separate this effect from internal variability. For comparison, the precipitation reduction from the temperature-independent effect of increasing CO 2 concentrations under the RCP4. 5 scenario of the future is approximately 0.5%. The temperature-independent effect of stratospheric sulphate aerosol arises from the aerosol's effect on tropospheric radiative cooling. Radiative transfer calculations show this is mainly due to increasing downward emission of infrared radiation by the aerosol, but there is also a contribution from the stratospheric warming the aerosol causes. Our results suggest climate model simulations of solar dimming can capture the main features of the global-mean precipitation response to stratospheric aerosol geoengineering.
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影响因子：
4.9
作者：
Pendergrass, Angeline G.;Hartmann, Dennis L.
通讯作者：
Hartmann, Dennis L.
影响因子：
4.4
作者：
Iles, Carley E.;Hegerl, Gabriele C.;Zhang, Xuebin
通讯作者：
Zhang, Xuebin
地球工程硫酸盐气溶胶对排放策略的依赖性
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
U. Niemeier;H. Schmidt;C. Timmreck
通讯作者：
C. Timmreck
影响因子：
6.3
作者：
U. Niemeier;C. Timmreck
通讯作者：
U. Niemeier;C. Timmreck
影响因子：
5.2
作者：
Andrews, Timothy;Forster, Piers M.;Jones, Andy
通讯作者：
Jones, Andy