Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-10191-2019 |
An emulator approach to stratocumulus susceptibility | |
Glassmeier, Franziska1,4; Hoffmann, Fabian1,2; Johnson, Jill S.3; Yamaguchi, Takanobu1,2; Carslaw, Ken S.3; Feingold, Graham1 | |
2019-08-13 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
![]() |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:15 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England; Netherlands |
英文摘要 | The climatic relevance of aerosol-cloud interactions depends on the sensitivity of the radiative effect of clouds to cloud droplet number N, and liquid water path LWP. We derive the dependence of cloud fraction CF, cloud albedo A(C), and the relative cloud radiative effect rCRE = CF . A(C) on N and LWP from 159 large-eddy simulations of nocturnal stratocumulus. These simulations vary in their initial conditions for temperature, moisture, boundary-layer height, and aerosol concentration but share boundary conditions for surface fluxes and subsidence. Our approach is based on Gaussian-process emulation, a statistical technique related to machine learning. We succeed in building emulators that accurately predict simulated values of CF, A(C), and rCRE for given values of N and LWP. Emulator-derived susceptibilities partial derivative lnrCRE/partial derivative lnN and partial derivative lnrCRE/partial derivative lnLWP cover the nondrizzling, fully overcast regime as well as the drizzling regime with broken cloud cover. Theoretical results, which are limited to the nondrizzling regime, are reproduced. The susceptibility partial derivative lnrCRE/partial derivative lnN captures the strong sensitivity of the cloud radiative effect to cloud fraction, while the susceptibility partial derivative lnrCRE/partial derivative lnLWP describes the influence of cloud amount on cloud albedo irrespective of cloud fraction. Our emulation-based approach provides a powerful tool for summarizing complex data in a simple framework that captures the sensitivities of cloud-field properties over a wide range of states. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000481493000002 |
WOS关键词 | AEROSOL-CLOUD INTERACTIONS ; LARGE-EDDY SIMULATIONS ; CUMULUS TRANSITION ; MODEL ; PRECIPITATION ; MICROPHYSICS ; POLLUTION ; ATLANTIC ; DRIZZLE ; ALBEDO |
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/185955 |
专题 | 地球科学 |
作者单位 | 1.NOAA, Chem Sci Div, Earth Syst Res Lab, 325 Broadway, Boulder, CO 80302 USA; 2.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 3.Univ Leeds, Sch Earth & Environm, Woodhouse Lane, Leeds LS2 9JT, W Yorkshire, England; 4.Wageningen Univ, Dept Environm Sci, POB 47, NL-6700 AA Wageningen, Netherlands |
推荐引用方式 GB/T 7714 | Glassmeier, Franziska,Hoffmann, Fabian,Johnson, Jill S.,et al. An emulator approach to stratocumulus susceptibility[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(15). |
APA | Glassmeier, Franziska,Hoffmann, Fabian,Johnson, Jill S.,Yamaguchi, Takanobu,Carslaw, Ken S.,&Feingold, Graham.(2019).An emulator approach to stratocumulus susceptibility.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(15). |
MLA | Glassmeier, Franziska,et al."An emulator approach to stratocumulus susceptibility".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.15(2019). |
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