Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-13071-2017 |
Marine cloud brightening - as effective without clouds | |
Ahlm, Lars1,2,3; Jones, Andy4; Stjern, Camilla W.3,5; Muri, Helene3; Kravitz, Ben6; Kristjansson, Jon Egill3 | |
2017-11-06 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:21 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Norway; England; USA |
英文摘要 | Marine cloud brightening through sea spray injection has been proposed as a climate engineering method for avoiding the most severe consequences of global warming. A limitation of most of the previous modelling studies on marine cloud brightening is that they have either considered individual models or only investigated the effects of a specific increase in the number of cloud droplets. Here we present results from coordinated simulations with three Earth system models (ESMs) participating in the Geoengineering Model Intercomparison Project (GeoMIP) G4sea-salt experiment. Injection rates of accumulation-mode sea spray aerosol particles over ocean between 30 degrees N and 30 degrees S are set in each model to generate a global-mean effective radiative forcing (ERF) of -2.0 W m(-2) at the top of the atmosphere. We find that the injection increases the cloud droplet number concentration in lower layers, reduces the cloud-top effective droplet radius, and increases the cloud optical depth over the injection area. We also find, however, that the global-mean clear-sky ERF by the injected particles is as large as the corresponding total ERF in all three ESMs, indicating a large potential of the aerosol direct effect in regions of low cloudiness. The largest enhancement in ERF due to the presence of clouds occur as expected in the subtropical stratocumulus regions off the west coasts of the American and African continents. However, outside these regions, the ERF is in general equally large in cloudy and clear-sky conditions. These findings suggest a more important role of the aerosol direct effect in sea spray climate engineering than previously thought. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414516100005 |
WOS关键词 | EARTH-SYSTEM MODEL ; RELATIVE-HUMIDITY ; CLIMATE ; ALBEDO ; MICROPHYSICS ; ENHANCEMENT ; SIMULATIONS ; TEMPERATURE ; INJECTION ; PARTICLE |
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/20541 |
专题 | 地球科学 |
作者单位 | 1.Stockholm Univ, Dept Meteorol, Stockholm, Sweden; 2.Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden; 3.Univ Oslo, Dept Geosci, Oslo, Norway; 4.Hadley Ctr, Met Off, Exeter, Devon, England; 5.CICERO, Oslo, Norway; 6.Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99352 USA |
推荐引用方式 GB/T 7714 | Ahlm, Lars,Jones, Andy,Stjern, Camilla W.,et al. Marine cloud brightening - as effective without clouds[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(21). |
APA | Ahlm, Lars,Jones, Andy,Stjern, Camilla W.,Muri, Helene,Kravitz, Ben,&Kristjansson, Jon Egill.(2017).Marine cloud brightening - as effective without clouds.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(21). |
MLA | Ahlm, Lars,et al."Marine cloud brightening - as effective without clouds".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.21(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论