GSTDTAP  > 地球科学
DOI10.5194/acp-17-4871-2017
Is increasing ice crystal sedimentation velocity in geoengineering simulations a good proxy for cirrus cloud seeding?
Gasparini, Blaz; Munch, Steffen; Poncet, Laure; Feldmann, Monika; Lohmann, Ulrike
2017-04-13
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2017
卷号17期号:7
文章类型Article
语种英语
国家Switzerland
英文摘要

The complex microphysical details of cirrus seeding with ice nucleating particles (INPs) in numerical simulations are often mimicked by increasing ice crystal sedimentation velocities. So far it has not been tested whether these results are comparable to geoengineering simulations in which cirrus clouds are seeded with INPs. We compare simulations where the ice crystal sedimentation velocity is increased at temperatures colder than -35 degrees C with simulations of cirrus seeding with INPs using the ECHAM-HAM general circulation model. The radiative flux response of the two methods shows a similar behaviour in terms of annual and seasonal averages. Both methods decrease surface temperature but increase precipitation in response to a decreased atmospheric stability. Moreover, simulations of seeding with INPs lead to a decrease in liquid clouds, which counteracts part of the cooling due to changes in cirrus clouds. The liquid cloud response is largely avoided in a simulation where seeding occurs during night only. Simulations with increased ice crystal sedimentation velocity, however, lead to counteracting mixed-phase cloud responses. The increased sedimentation velocity simulations can counteract up to 60% of the radiative effect of CO2 doubling with a maximum net top-of-the-atmosphere forcing of -2.2W m(-2). They induce a 30% larger surface temperature response, due to their lower altitude of maximum diabatic forcing compared with simulations of seeding with INPs.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000403956400003
WOS关键词PARAMETERIZATION ; NUCLEATION ; NUCLEI ; WATER ; MICROPHYSICS ; SENSITIVITY ; AEROSOLS ; WEATHER ; CYCLE ; SIZE
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/20610
专题地球科学
作者单位Swiss Fed Inst Technol, Inst Atmospher & Climate Sci, Zurich, Switzerland
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Gasparini, Blaz,Munch, Steffen,Poncet, Laure,et al. Is increasing ice crystal sedimentation velocity in geoengineering simulations a good proxy for cirrus cloud seeding?[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(7).
APA Gasparini, Blaz,Munch, Steffen,Poncet, Laure,Feldmann, Monika,&Lohmann, Ulrike.(2017).Is increasing ice crystal sedimentation velocity in geoengineering simulations a good proxy for cirrus cloud seeding?.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(7).
MLA Gasparini, Blaz,et al."Is increasing ice crystal sedimentation velocity in geoengineering simulations a good proxy for cirrus cloud seeding?".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.7(2017).
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