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DOI	10.1016/j.atmosres.2021.105856
	Validation of Australian atmospheric aerosols from reanalysis data and CMIP6 simulations
	Isaza A.; Kay M.; Evans J.P.; Bremner S.; Prasad A.
发表日期	2021
ISSN	0169-8095
卷号	264
英文摘要	This study evaluates the performance of different data sources in representing the spatio-temporal characteristics of aerosol species over Australia, which is one of the primary sources of dust in the Southern Hemisphere and an important contributor to global biomass burning emissions. First, NASA/MERRA2 and ECMWF/CAMS Total AOD550nm are evaluated against 16 AERONET stations during 2003–2018, with CAMS consistently underestimating (−15%) and MERRA2 overestimating (19%) the total AOD. Despite the differences in magnitudes, both reanalyses capture the measured Australian aerosols’ seasonal and interannual variability, mainly modulated by seasonal biomass burning and episodic dust storms. CAMS performs remarkably well in low aerosol conditions, while MERRA2 captures extreme aerosol events better. The intercomparison of the different aerosol species from the two reanalyses confirms that CAMS shows lower mean aerosol species concentrations than MERRA2. Results show the greatest differences (more than 50%) in sea salt and sulfates, while organic matter AOD is similarly represented between both reanalyses, with differences of roughly 3%. The spatial distribution and annual cycle of the aerosol types are also compared. In both reanalyses, carbonaceous AOD (black carbon and organic matter) are predominant in the northern part of the country during austral spring, and are highly correlated with MODIS active fires. Dust aerosols prevail in central Australia in summer, and sulfates in the main urban areas throughout the year. However, unlike the other species, sea salt exhibits opposite annual cycles in the two reanalyses. Finally, both MERRA2 and CAMS are used to evaluate the historical simulations of 16 GCM from CMIP6. The models capture the Australian aerosols’ annual variation, although they tend to overestimate dust and underrepresent biomass burning AOD. IPSL-CM6A-LR and EC-Earth3-AerChem perform particularly well simulating aerosols over Australia. The evaluation of Australian aerosols performed in this study could contribute to reanalysis and climate model improvements, as well as improving long-term solar energy resources assessment. © 2021 Elsevier B.V.
英文关键词	AERONET; Aerosol optical depth; Atmospheric aerosols; CAMS; Climate models; CMIP6; MERRA2; Reanalysis
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236553
作者单位	School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW, Australia; ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, Australia; Climate Change Research Centre, Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, Australia
推荐引用方式 GB/T 7714	Isaza A.,Kay M.,Evans J.P.,et al. Validation of Australian atmospheric aerosols from reanalysis data and CMIP6 simulations[J],2021,264.
APA	Isaza A.,Kay M.,Evans J.P.,Bremner S.,&Prasad A..(2021).Validation of Australian atmospheric aerosols from reanalysis data and CMIP6 simulations.Atmospheric Research,264.
MLA	Isaza A.,et al."Validation of Australian atmospheric aerosols from reanalysis data and CMIP6 simulations".Atmospheric Research 264(2021).