| DOI: | 10.1002/2015JD024666
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| 论文题名: | Why cirrus cloud seeding cannot substantially cool the planet |
| 作者: | Gasparini B.; Lohmann U.
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| 刊名: | Journal of Geophysical Research: Atmospheres
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| ISSN: | 2169897X
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| 出版年: | 2016
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| 卷: | 121, 期:9 | | 起始页码: | 4877
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| 结束页码: | 4893
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| 语种: | 英语
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| 英文关键词: | cirrus microphysics
; cirrus radiative effects
; climate engineering
; cloud seeding
; geoengineering
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| Scopus关键词: | cirrus
; cloud cover
; cloud microphysics
; cloud radiative forcing
; cloud seeding
; cooling
; freezing
; general circulation model
; ice crystal
; research work
; spectrum
; updraft
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| 英文摘要: | The net warming effect of cirrus clouds has driven part of the geoengineering research toward the idea of decreasing their occurrence frequency by seeding them with efficient ice nucleating particles. We study responses of cirrus clouds to simplified global seeding strategies in terms of their radiative fluxes with the help of the ECHAM-HAM general circulation model. Our cirrus scheme takes into account the competition between homogeneous and heterogeneous freezing, preexisting ice crystals, and the full spectrum of updraft velocities. While we find that the cirrus cloud radiative effect evaluated from our model is positive and large enough (5.7 W/m2) to confirm their geoengineering potential, none of the seeding strategies achieves a significant cooling due to complex microphysical mechanisms limiting their climatic responses. After globally uniform seeding is applied, we observe an increase in cirrus cloud cover, a decrease in ice crystal number concentration, and a decrease in ice crystal radius. An analysis of their respective radiative contributions points to the ice crystal radius decrease as the main factor limiting seeding effectiveness. © 2016. The Authors. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/62890
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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作者单位: | Institute for Atmospheric and Climate Science, ETH Zürich, Zürich, Switzerland
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| Recommended Citation: | |
Gasparini B.,Lohmann U.. Why cirrus cloud seeding cannot substantially cool the planet[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(9)
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