气候变化领域集成服务门户(CCPortal): Effects of marine organic aerosols as sources of immersion-mode ice-nucleating particles on high-latitude mixed-phase clouds

CCPortal

DOI	10.5194/acp-21-2305-2021
	Effects of marine organic aerosols as sources of immersion-mode ice-nucleating particles on high-latitude mixed-phase clouds
	Zhao X.; Liu X.; Burrows S.M.; Shi Y.
发表日期	2021
ISSN	1680-7316
起始页码	2305
结束页码	2327
卷号	21 期号:4
英文摘要	Mixed-phase clouds are frequently observed in high-latitude regions and have important impacts on the surface energy budget and regional climate. Marine organic aerosol (MOA), a natural source of aerosol emitted over 70% of Earth s surface, may significantly modify the properties and radiative forcing of mixed-phase clouds. However, the relative importance of MOA as a source of icenucleating particles (INPs) in comparison to mineral dust, and MOA s effects as cloud condensation nuclei (CCN) and INPs on mixed-phase clouds are still open questions. In this study, we implement MOA as a new aerosol species into the Community Atmosphere Model version 6 (CAM6), the atmosphere component of the Community Earth System Model version 2 (CESM2), and allow the treatment of aerosol cloud interactions ofMOA via droplet activation and ice nucleation. CAM6 reproduces observed seasonal cycles of marine organic matter at Mace Head and Amsterdam Island when the MOA fraction of sea spray aerosol in the model is assumed to depend on sea spray biology but fails when this fraction is assumed to be constant. Model results indicate that marine INPs dominate primary ice nucleation below 400 hPa over the Southern Ocean and Arctic boundary layer, while dust INPs are more abundant elsewhere. By acting as CCN, MOA exerts a shortwave cloud forcing change of-2.78Wm-2 over the Southern Ocean in the austral summer. By acting as INPs, MOA enhances the longwave cloud forcing by 0.35Wm-2 over the Southern Ocean in the austral winter. The annual global mean net cloud forcing changes due to CCN and INPs of MOA are-0.35 and 0.016Wm-2, respectively. These findings highlight the vital importance for Earth system models to consider MOA as an important aerosol species for the interactions of biogeochemistry, hydrological cycle, and climate change. © 2018 Georg Thieme Verlag. All rights reserved.
语种	英语
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/168754
作者单位	Department of Atmospheric Sciences, Texas AandM University, College Station, TX 77840, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States
推荐引用方式 GB/T 7714	Zhao X.,Liu X.,Burrows S.M.,et al. Effects of marine organic aerosols as sources of immersion-mode ice-nucleating particles on high-latitude mixed-phase clouds[J],2021,21(4).
APA	Zhao X.,Liu X.,Burrows S.M.,&Shi Y..(2021).Effects of marine organic aerosols as sources of immersion-mode ice-nucleating particles on high-latitude mixed-phase clouds.Atmospheric Chemistry and Physics,21(4).
MLA	Zhao X.,et al."Effects of marine organic aerosols as sources of immersion-mode ice-nucleating particles on high-latitude mixed-phase clouds".Atmospheric Chemistry and Physics 21.4(2021).