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DOI | 10.5194/acp-18-7827-2018 |
Aerosol-fog interaction and the transition to well-mixed radiation fog | |
Boutle, Ian1; Price, Jeremy1; Kudzotsa, Innocent2; Kokkola, Harri2; Romakkaniemi, Sami2 | |
2018-06-04 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:11页码:7827-7840 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Finland |
英文摘要 | We analyse the development of a radiation fog event and its gradual transition from optically thin fog in a stable boundary layer to well-mixed optically thick fog. A comparison of observations and a detailed large-eddy simulation demonstrate that aerosol growth and activation is the key process in determining the onset of adiabatic fog. Weak turbulence and low supersaturations lead to the growth of aerosol particles which can significantly affect the visibility but do not significantly interact with the long-wave radiation, allowing the atmosphere to remain stable. Only when a substantial fraction of the aerosol activates into cloud droplets can the fog interact with the radiation, becoming optically thick and well mixed. Modifications to the parameterisation of cloud droplet numbers in fog, resulting in lower and more realistic concentrations, are shown to give significant improvements to an NWP model, which initially struggled to accurately simulate the transition. Finally, the consequences of this work for common aerosol activation parameterisations used in climate models are discussed, demonstrating that many schemes are reliant on an artificial minimum value when activating aerosol in fog, and adjustment of this minimum can significantly affect the sensitivity of the climate system to aerosol radiative forcing. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000434114200005 |
WOS关键词 | LARGE-EDDY SIMULATION ; LIFE-CYCLE ; UNIFIED MODEL ; PREDICTION ; CLOUD ; PARAMETERIZATION ; STRATOCUMULUS ; MICROPHYSICS ; VARIABILITY ; VISIBILITY |
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/30905 |
专题 | 地球科学 |
作者单位 | 1.Met Off, Exeter, Devon, England; 2.Finnish Meteorol Inst, Atmospher Res Ctr Eastern Finland, Kuopio, Finland |
推荐引用方式 GB/T 7714 | Boutle, Ian,Price, Jeremy,Kudzotsa, Innocent,et al. Aerosol-fog interaction and the transition to well-mixed radiation fog[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(11):7827-7840. |
APA | Boutle, Ian,Price, Jeremy,Kudzotsa, Innocent,Kokkola, Harri,&Romakkaniemi, Sami.(2018).Aerosol-fog interaction and the transition to well-mixed radiation fog.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(11),7827-7840. |
MLA | Boutle, Ian,et al."Aerosol-fog interaction and the transition to well-mixed radiation fog".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.11(2018):7827-7840. |
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