期刊
COMMUNICATIONS EARTH & ENVIRONMENT
卷 2, 期 1, 页码 -出版社
SPRINGERNATURE
DOI: 10.1038/s43247-021-00275-8
关键词
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资金
- Climate and Land Use Alliance (CLUA) [G-1811-55910]
- Fundacao de Amparo a Pesquisa do Espirito Santo (FAPES) [85142522/2019]
- National Institute for Science and Technology on Climate Change phase 2 (INCT-MC2)
- FAPESP [2014/50848-9]
- CAPES/ANA [88887.115872/2015]
The complete savannization of the Amazon Basin would exacerbate the impact of climate change on local heat exposure, increasing the risk to human health according to climate model projections. Deforestation and land use change can influence local temperature and climate. The study found that by 2100, more than 11 million people will be exposed to extreme heat stress as a result of the savannization of the Amazon Basin, particularly in Northern Brazil and among the most socially vulnerable populations.
Complete savannization of the Amazon Basin would enhance the effects of climate change on local heat exposure and pose a risk to human health, according to climate model projections. Land use change and deforestation can influence local temperature and climate. Here we use a coupled ocean-atmosphere model to assess the impact of savannization of the Amazon Basin on the wet-bulb globe temperature heat stress index under two climate change scenarios (RCP4.5 and RCP8.5). We find that heat stress exposure due to deforestation was comparable to the effect of climate change under RCP8.5. Our findings suggest that heat stress index could exceed the human adaptation limit by 2100 under the combined effects of Amazon savannization and climate change. Moreover, we find that risk of heat stress exposure was highest in Northern Brazil and among the most socially vulnerable. We suggest that by 2100, savannization of the Amazon will lead to more than 11 million people will be exposed heat stress that poses an extreme risk to human health under a high emission scenario.
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