气候变化领域集成服务门户(CCPortal): Separating radiative forcing by aerosol-cloud interactions and rapid cloud adjustments in the ECHAM-HAMMOZ aerosol-climate model using the method of partial radiative perturbations

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DOI	10.5194/acp-19-15415-2019
	Separating radiative forcing by aerosol-cloud interactions and rapid cloud adjustments in the ECHAM-HAMMOZ aerosol-climate model using the method of partial radiative perturbations
	Mülmenstädt J.; Gryspeerdt E.; Salzmann M.; Ma P.-L.; Dipu S.; Quaas J.
发表日期	2019
ISSN	16807316
起始页码	15415
结束页码	15429
卷号	19 期号:24
英文摘要	Using the method of offline radiative transfer modeling within the partial radiative perturbation (PRP) approach, the effective radiative forcing by aerosol-cloud interactions (ERFaci) in the ECHAM-HAMMOZ aerosol climate model is decomposed into a radiative forcing by anthropogenic cloud droplet number change and adjustments of the liquid water path and cloud fraction. The simulated radiative forcing by anthropogenic cloud droplet number change and liquid water path adjustment are of approximately equal magnitude at-0:52 and-0:53Wm-2, respectively, while the cloud-fraction adjustment is somewhat weaker at-0:31Wm-2 (constituting 38 %, 39 %, and 23% of the total ERFaci, respectively); geographically, all three ERFaci components in the simulation peak over China, the subtropical eastern ocean boundaries, the northern Atlantic and Pacific oceans, Europe, and eastern North America (in order of prominence). Spatial correlations indicate that the temporal-mean liquid water path adjustment is proportional to the temporal-mean radiative forcing, while the relationship between cloud-fraction adjustment and radiative forcing is less direct. While the estimate of warm-cloud ERFaci is relatively insensitive to the treatment of ice and mixedphase cloud overlying warm cloud, there are indications that more restrictive treatments of ice in the column result in a low bias in the estimated magnitude of the liquid water path adjustment and a high bias in the estimated magnitude of the droplet number forcing. Since the present work is the first PRP decomposition of the aerosol effective radiative forcing into radiative forcing and rapid cloud adjustments, idealized experiments are conducted to provide evidence that the PRP results are accurate. The experiments show that using low-frequency (daily or monthly) time-averaged model output of the cloud property fields underestimates the ERF, but 3-hourly mean output is sufficiently frequent. © 2019 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; climate modeling; cloud droplet; perturbation; radiative forcing; separation; spatial analysis; Atlantic Ocean; Atlantic Ocean (North); China; Europe; North America; Pacific Ocean
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/143964
作者单位	Institute of Meteorology, Universität Leipzig, Leipzig, Germany; Space and Atmospheric Physics Group, Imperial College London, London, United Kingdom; Pacific Northwest National Laboratory, Richland, WA, United States; Pacific Northwest National Laboratory, Richland, WA, United States
推荐引用方式 GB/T 7714	Mülmenstädt J.,Gryspeerdt E.,Salzmann M.,et al. Separating radiative forcing by aerosol-cloud interactions and rapid cloud adjustments in the ECHAM-HAMMOZ aerosol-climate model using the method of partial radiative perturbations[J],2019,19(24).
APA	Mülmenstädt J.,Gryspeerdt E.,Salzmann M.,Ma P.-L.,Dipu S.,&Quaas J..(2019).Separating radiative forcing by aerosol-cloud interactions and rapid cloud adjustments in the ECHAM-HAMMOZ aerosol-climate model using the method of partial radiative perturbations.Atmospheric Chemistry and Physics,19(24).
MLA	Mülmenstädt J.,et al."Separating radiative forcing by aerosol-cloud interactions and rapid cloud adjustments in the ECHAM-HAMMOZ aerosol-climate model using the method of partial radiative perturbations".Atmospheric Chemistry and Physics 19.24(2019).