Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-6957-2017 |
Radiative and climate effects of stratospheric sulfur geoengineering using seasonally varying injection areas | |
Laakso, Anton1,2; Korhonen, Hannele3; Romakkaniemi, Sami1; Kokkola, Harri1 | |
2017-06-14 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland; USA |
英文摘要 | Stratospheric sulfur injections have often been suggested as a cost-effective geoengineering method to prevent or slow down global warming. In geoengineering studies, these injections are commonly targeted to the Equator, where the yearly mean intensity of the solar radiation is the highest and from where the aerosols disperse globally due to the Brewer-Dobson Circulation. However, compensating for greenhouse gas-induced zonal warming by reducing solar radiation would require a relatively larger radiative forcing to the mid-and high latitudes and a lower forcing to the low latitudes than what is achieved by continuous equatorial injections. In this study we employ alternative aerosol injection scenarios to investigate if the resulting radiative forcing can be targeted to be zonally more uniform without decreasing the global the mean radiative forcing of stratospheric sulfur geoengineering. We used a global aerosol-climate model together with an Earth system model to study the radiative and climate effects of stratospheric sulfur injection scenarios with different injection areas. According to our simulations, varying the SO2 injection area seasonally would result in a similar global mean cooling effect as injecting SO2 to the Equator, but with a more uniform zonal distribution of shortwave radiative forcing. Compared to the case of equatorial injections, in the seasonally varying injection scenario where the maximum sulfur production from injected SO2 followed the maximum of solar radiation, the shortwave radiative forcing decreased by 27% over the Equator (the latitudes between 20 degrees N and 20 degrees S) and increased by 15% over higher latitudes. Compared to the continuous injections to the Equator, in summer months the radiative forcing was increased by 17 and 14% and in winter months decreased by 14 and 16% in Northern and Southern hemispheres, respectively. However, these forcings do not translate into as large changes in temperatures. The changes in forcing would only lead to 0.05K warmer winters and 0.05K cooler summers in the Northern Hemisphere, which is roughly 3% of the cooling resulting from solar radiation management scenarios studied here. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403219000001 |
WOS关键词 | SOLAR IRRADIANCE REDUCTION ; MODEL ; AEROSOL ; IMPACTS ; SULFATE ; SENSITIVITY ; BALANCE ; MODULE ; CARBON ; SALSA |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28346 |
专题 | 地球科学 |
作者单位 | 1.Finnish Meteorol Inst, Atmospher Res Ctr Eastern Finland, Kuopio 70200, Finland; 2.Univ Minnesota, Dept Soil Water & Climate, St Paul, MN 55108 USA; 3.Finnish Meteorol Inst, Climate Res, Helsinki 00100, Finland |
推荐引用方式 GB/T 7714 | Laakso, Anton,Korhonen, Hannele,Romakkaniemi, Sami,et al. Radiative and climate effects of stratospheric sulfur geoengineering using seasonally varying injection areas[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(11). |
APA | Laakso, Anton,Korhonen, Hannele,Romakkaniemi, Sami,&Kokkola, Harri.(2017).Radiative and climate effects of stratospheric sulfur geoengineering using seasonally varying injection areas.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(11). |
MLA | Laakso, Anton,et al."Radiative and climate effects of stratospheric sulfur geoengineering using seasonally varying injection areas".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.11(2017). |
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