气候变化领域集成服务门户(CCPortal): Evaluation of sea salt aerosols in climate systems: global climate modeling and observation-based analyses

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DOI	10.1088/1748-9326/ab751c
	Evaluation of sea salt aerosols in climate systems: global climate modeling and observation-based analyses
	Chen Y.-C.; Li J.-L.F.; Lee W.-L.; Diner D.J.; Garay M.J.; Jiang J.H.; Wang Y.-H.; Yu J.-Y.; Kalashnikova O.V.
发表日期	2020
ISSN	17489318
卷号	15 期号:3
英文摘要	Sea salt aerosols (SSA), one of the most abundant aerosol species over the global oceans, play important roles for Earth's climate. State-of-the-art SSA parameterizations in global climate models (GCMs) are typically modeled using near-surface wind speed, sea surface temperature (SST), and precipitation. However, these have non-trivial biases in CMIP3 and CMIP5 GCMs over the tropical Pacific Ocean that can contribute to biases in the simulated SSA. This study investigates the impacts of falling ice radiative effects on the biases of the aforementioned modeled parameters and the resulting modeled SSA biases. We compare the CMIP5 modeled SSA against satellite observations from MISR and MODIS using a pair of sensitivity experiments with falling ice radiative effects on and off in the CESM1-CAM5 model. The results show that when falling ice radiative effects are not taken into account, models have weaker surface wind speeds, warmer SSTs, excessive precipitation, and diluted sea surface salinity (SSS) over the Pacific trade-wind regions, leading to underestimated SSA. In the tropical Pacific Ocean, the inclusion of falling ice radiative effects leads to improvements in the modeled near-surface wind speeds, SSTs, and precipitation through cloud-precipitation-radiation-circulation coupling, which results in more representative patterns of SSA and reduces the SSA biases by ∼10% to 15% relative to the satellite observations. Models including falling ice radiative effects in CMIP5 produce smaller biases in SSA than those without falling ice radiative effects. We suggest that one of the causes of these biases is likely the failure to account for falling ice radiative effects, and these biases in turn affect the direct and indirect effects of SSA in the GCMs. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	aerosols; falling ice radiative effects; global climate modeling; sea salt
语种	英语
scopus关键词	Aerosols; Ice; Oceanography; Precipitation (meteorology); Radiation effects; Surface waters; Tropics; Wind; Global climate model; Radiative effects; Representative patterns; Satellite observations; Sea salts; Sea surface salinity; Sea surface temperature (SST); Tropical Pacific ocean; Climate models; aerosol; climate modeling; CMIP; global climate; MISR; MODIS; precipitation intensity; satellite altimetry; satellite data; sea surface salinity; sea surface temperature; Pacific Ocean
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154196
作者单位	Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; California Polytechnic State University, San Luis Obispo, United States; Department of Atmospheric Sciences, National Central University, Taoyuan City, Taiwan
推荐引用方式 GB/T 7714	Chen Y.-C.,Li J.-L.F.,Lee W.-L.,et al. Evaluation of sea salt aerosols in climate systems: global climate modeling and observation-based analyses[J],2020,15(3).
APA	Chen Y.-C..,Li J.-L.F..,Lee W.-L..,Diner D.J..,Garay M.J..,...&Kalashnikova O.V..(2020).Evaluation of sea salt aerosols in climate systems: global climate modeling and observation-based analyses.Environmental Research Letters,15(3).
MLA	Chen Y.-C.,et al."Evaluation of sea salt aerosols in climate systems: global climate modeling and observation-based analyses".Environmental Research Letters 15.3(2020).