气候变化领域集成服务门户(CCPortal): Impacts of marine organic emissions on low-level stratiform clouds

CCPortal

DOI	10.5194/acp-22-10971-2022
	Impacts of marine organic emissions on low-level stratiform clouds - a large eddy simulator study
	Prank, Marje; Tonttila, Juha; Ahola, Jaakko; Kokkola, Harri; Kuhn, Thomas; Romakkaniemi, Sami; Raatikainen, Tomi
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	10971
结束页码	10992
卷号	22 期号:16 页码:22
英文摘要	The goal of this study is to investigate the role of organic aerosols emitted with sea spray or formed from marine gas phase emissions of volatile organic compounds (VOCs) in influencing the stability of stratiform marine clouds. We aim to point out the processes and drivers that could be relevant for global climate and should thus be considered in large-scale models. We employ a large eddy simulator coupled with an aerosol-cloud microphysical model together with different parameterizations for emission of sea salt, primary organic aerosol, and VOCs from sea surface and formation of secondary organic aerosol (SOA), to simulate the conditions of the second Dynamics and Chemistry of Marine Stratocumulus observational campaign characterized by low-level stratocumulus clouds transitioning from closed cells to drizzling open cell structure. We find that the inclusion of sea spray emissions can both extend and shorten the transitioning timescale between closed and open cells based on the parameterization employed. Fine sea spray provides extra cloud condensation nuclei (CCN) and delays the onset of drizzle as the collision-coalescence process is slowed down due to smaller cloud droplet mean size. The coarse mode has an opposite effect due to giant CCN (GCCN) speeding up the drizzle formation through the enhanced collision-coalescence processes. The balance between two processes depends on the model parameterization employed. Compared to differences between different sea spray parameterizations, the sensitivity of the clouds to the variations in organic fraction of sea spray and hygroscopicity of the emitted particles is relatively limited. However, our results show that it is important to account for the size dependence of the sea spray organic fraction as attributing organic emissions to coarse mode noticeably reduces the GCCN effect. In addition, including the secondary organic aerosol formation from VOCs can potentially have a noticeable impact, but only when emitting the highest observed fluxes of monoterpenes. This impact is also highly sensitive on the size distribution of the background aerosol population. SOA production from isoprene is visible only if aqueous phase SOA production pathways are included, and even then, the effect is lower than from monoterpenes.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000847384600001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273395
作者单位	Finnish Meteorological Institute; Finnish Meteorological Institute
推荐引用方式 GB/T 7714	Prank, Marje,Tonttila, Juha,Ahola, Jaakko,et al. Impacts of marine organic emissions on low-level stratiform clouds - a large eddy simulator study[J],2022,22(16):22.
APA	Prank, Marje.,Tonttila, Juha.,Ahola, Jaakko.,Kokkola, Harri.,Kuhn, Thomas.,...&Raatikainen, Tomi.(2022).Impacts of marine organic emissions on low-level stratiform clouds - a large eddy simulator study.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(16),22.
MLA	Prank, Marje,et al."Impacts of marine organic emissions on low-level stratiform clouds - a large eddy simulator study".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.16(2022):22.