气候变化领域集成服务门户(CCPortal): The value of remote marine aerosol measurements for constraining radiative forcing uncertainty

CCPortal

DOI	10.5194/acp-20-10063-2020
	The value of remote marine aerosol measurements for constraining radiative forcing uncertainty
	Regayre L.A.; Schmale J.; Johnson J.S.; Tatzelt C.; Baccarini A.; Henning S.; Yoshioka M.; Stratmann F.; Gysel-Beer M.; Grosvenor D.P.; Carslaw K.S.
发表日期	2020
ISSN	1680-7316
起始页码	10063
结束页码	10072
卷号	20 期号:16
英文摘要	Aerosol measurements over the Southern Ocean are used to constrain aerosol-cloud interaction radiative forcing (RFaci) uncertainty in a global climate model. Forcing uncertainty is quantified using 1 million climate model variants that sample the uncertainty in nearly 30 model parameters. Measurements of cloud condensation nuclei and other aerosol properties from an Antarctic circumnavigation expedition strongly constrain natural aerosol emissions: default sea spray emissions need to be increased by around a factor of 3 to be consistent with measurements. Forcing uncertainty is reduced by around 7% using this set of several hundred measurements, which is comparable to the 8% reduction achieved using a diverse and extensive set of over 9000 predominantly Northern Hemisphere measurements. When Southern Ocean and Northern Hemisphere measurements are combined, uncertainty in RFaci is reduced by 21 %, and the strongest 20% of forcing values are ruled out as implausible. In this combined constraint, observationally plausible RFaci is around 0.17Wm-2 weaker (less negative) with 95% credible values ranging from-2:51 to-1:17Wm-2 (standard deviation of-2:18 to-1:46Wm-2). The Southern Ocean and Northern Hemisphere measurement datasets are complementary because they constrain different processes. These results highlight the value of remote marine aerosol measurements. © 2020 Laser Institute of America. All rights reserved.
语种	英语
scopus关键词	aerosol; climate modeling; cloud condensation nucleus; cloud radiative forcing; global climate; Northern Hemisphere; uncertainty analysis; Southern 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/141130
作者单位	Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, LS2g9JT, United Kingdom; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, Villigen, Switzerland; École Polytechnique Fédéderale de Lausanne, Lausanne, Switzerland; Leibniz Institute for Tropospheric Research, Leipzig, Germany; National Centre for Atmospheric Science, Leeds, United Kingdom
推荐引用方式 GB/T 7714	Regayre L.A.,Schmale J.,Johnson J.S.,et al. The value of remote marine aerosol measurements for constraining radiative forcing uncertainty[J],2020,20(16).
APA	Regayre L.A..,Schmale J..,Johnson J.S..,Tatzelt C..,Baccarini A..,...&Carslaw K.S..(2020).The value of remote marine aerosol measurements for constraining radiative forcing uncertainty.Atmospheric Chemistry and Physics,20(16).
MLA	Regayre L.A.,et al."The value of remote marine aerosol measurements for constraining radiative forcing uncertainty".Atmospheric Chemistry and Physics 20.16(2020).