气候变化领域集成服务门户(CCPortal): Climatology and trends of downward shortwave radiation over Brazil

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DOI	10.1016/j.atmosres.2020.105347
	Climatology and trends of downward shortwave radiation over Brazil
	Zuluaga C.F.; Avila-Diaz A.; Justino F.B.; Wilson A.B.
发表日期	2020
ISSN	0169-8095
英文摘要	The solar downward shortwave radiation (DSWR) is the primary source of energy to Earth and a driving forcing for sensible/latent heat and water vapor fluxes over the terrestrial ecosystems and the atmosphere. Evaluation of the DSWR spatiotemporal patterns and trends is crucial to the understanding of weather and climate variability. In this study, DSWR is investigated over Brazil between 1980 and 2016 from contemporary state-of-the-art high-resolution gridded datasets (observations, reanalyses and merged products). The results show an increase in both annual and seasonal DSWR for all regions of Brazil, with large changes over the northern, west central, and southeastern parts of the country. The European Centre for Medium-Range Weather Forecast (ERA5) reanalysis proves to be an excellent option for investigating DSWR across Brazil, matching the observed climatology trends well. The best results are identified for the northeastern and southeastern regions during the months of March-April-May, and the poorest results for the center-west region during September-October-November. Changes in cloud cover (CC) are linked to changes in DSWR. Decadal fluctuations in CC are highly correlated with DSWR trends, with the strongest correlation (r = −0.89) in the southeast region, and weakest correlation (r = −0.37) in the north. We conclude that CC is a primary modulating factor of brightening across Brazil between 1980 and 2016. In a global context, our results agree with observations from other regions over the globe. Our results may indicate changes in the rainy seasons across Brazil, especially in the northeast. Future studies may use these results to further understand the impacts of brightening over Brazil on solar energy production and agriculture. © 2020 Elsevier B.V.
英文关键词	Brightening; Cloud cover; Gridded datasets; Solar radiation; Trends, Reanalysis
语种	英语
scopus关键词	Agricultural robots; Climatology; Earth atmosphere; Solar energy; Climate variability; Energy productions; European centre for medium-range weather forecasts; Highly-correlated; Modulating factor; Short-wave radiation; Spatiotemporal patterns; Terrestrial ecosystems; Weather forecasting
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/145232
作者单位	Department of Agricultural Engineering, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil; Byrd Polar and Climate Research Center, The Ohio State University, Columbus, OH 43210, United States; OSU Extension – College of Food, Agricultural, and Environmental Sciences, The Ohio State University, Columbus, OH 43210, United States
推荐引用方式 GB/T 7714	Zuluaga C.F.,Avila-Diaz A.,Justino F.B.,et al. Climatology and trends of downward shortwave radiation over Brazil[J],2020.
APA	Zuluaga C.F.,Avila-Diaz A.,Justino F.B.,&Wilson A.B..(2020).Climatology and trends of downward shortwave radiation over Brazil.Atmospheric Research.
MLA	Zuluaga C.F.,et al."Climatology and trends of downward shortwave radiation over Brazil".Atmospheric Research (2020).