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An observational analysis of precipitation and deforestation age in the Brazilian Legal Amazon | |
Ye. Mu, Charles Jones | |
2022-03-06 | |
发表期刊 | Atmospheric Research
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出版年 | 2022 |
英文摘要 | Rainfall in the Amazon is influenced by atmospheric circulation dynamics on multiple spatiotemporal scales. Anthropogenic influences such as deforestation, land-use changes, and global climate change are also critical factors in determining rainfall in South America. Modeling studies have projected a drier climate with the ongoing deforestation in the Amazon, but observational evaluation of the variability of rainfall and deforestation patterns has been limited. This study analyzes spatiotemporal trends in rainfall between 1981 and 2020 and relationships with deforestation age in the Brazilian Legal Amazon (BLA). An improved rainfall dataset is derived by calibrating the Climate Hazards Group Infrared Precipitation with Stations (CHIRPS) data with observations from a rain gauge network in the BLA. Trend analysis is employed to identify significant changes in precipitation over the BLA. Satellite-based land cover data Mapbiomas and ET datasets are used to evaluate similar trends. While large spatial variability is observed, the results show coherent relationships between negative dry-season rainfall trends and old-age deforested areas. Deforestation aged up to a decade enhanced rainfall and older deforested regions have reduced rainfall during the dry season. These results suggest substantial changes in the hydroclimate of the BLA and increased vulnerability to future land cover change. |
领域 | 地球科学 |
URL | 查看原文 |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/347753 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Ye. Mu, Charles Jones. An observational analysis of precipitation and deforestation age in the Brazilian Legal Amazon[J]. Atmospheric Research,2022. |
APA | Ye. Mu, Charles Jones.(2022).An observational analysis of precipitation and deforestation age in the Brazilian Legal Amazon.Atmospheric Research. |
MLA | Ye. Mu, Charles Jones."An observational analysis of precipitation and deforestation age in the Brazilian Legal Amazon".Atmospheric Research (2022). |
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