期刊
出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.2023787118
关键词
land use; deforestation; agricultural expansion; Amazon forest; regional climate
资金
- Academy of Finland [318252, 319905, 318645]
- Ministry for Foreign Affairs of Finland [HEL7MO453-72]
- Board of Education of Finland
- Sao Paulo Research Foundation (FAPESP) [2018/15001-6]
- National Council for Scientific and Technological Development [305054/2016-3]
- Royal Society [NF170036]
Deforestation in the Amazon rainforest has diverse and dynamic impacts on local climates, with large-scale commodity agriculture causing reductions in convective rainfall and increases in land surface temperature. Alternative agricultural practices and forest restoration are urgently needed to mitigate these effects.
In the Amazon rainforest, land use following deforestation is diverse and dynamic. Mounting evidence indicates that the climatic impacts of forest loss can also vary considerably, depending on specific features of the affected areas. The size of the deforested patches, for instance, was shown to modulate the characteristics of local climatic impacts. Nonetheless, the influence of different types of land use and management strategies on the magnitude of local climatic changes remains uncertain. Here, we evaluated the impacts of large-scale commodity farming and rural settlements on surface temperature, rainfall patterns, and energy fluxes. Our results reveal that changes in land-atmosphere coupling are induced not only by deforestation size but also, by land use type and management patterns inside the deforested areas. We provide evidence that, in comparison with rural settlements, deforestation caused by large-scale commodity agriculture is more likely to reduce convective rainfall and increase land surface temperature. We demonstrate that these differences are mainly caused by a more intensive management of the land, resulting in significantly lower vegetation cover throughout the year, which reduces latent heat flux. Our findings indicate an urgent need for alternative agricultural practices, as well as forest restoration, for maintaining ecosystem processes and mitigating change in the local climates across the Amazon basin.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据