Ambient PM(2.5) exposure and expected premature mortality to 2100 in India under climate change scenarios.

Ambient PM(2.5) exposure and expected premature mortality to 2100 in India under climate change scenarios.
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在气候变化方案下,环境PM(2.5)的暴露和预期在印度2100的预期死亡率。

DOI:
10.1038/s41467-017-02755-y
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发表时间:
2018-01-22
影响因子:
16.6
通讯作者:
Smith KR
Smith KR
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Chowdhury S;Dey S;Smith KR

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印度目前暴露在环境中的细颗粒物(PM2.5)导致的过早死亡率很高,但在气候变化下的趋势尚不清楚。在这里,我们通过将从耦合模式相互比较项目5(CMIP5)模型得出的基准期(2001-2005年)PM2.5的相对变化应用于卫星得出的PM2.5基线来估计2100年前的环境PM2.5暴露。然后,我们使用共享社会经济路径(SSP)情景中的社会经济和人口预测来预测死亡率负担。根据RCP4.5,环境PM2.5暴露预计将在2030年达到峰值,在RCP8.5情景下,预计将在2040年达到峰值。预计在2031-2040年和2091-2100年,RCP8.5情景下的过早死亡负担将比RCP4.5情景下分别高2.4-4%和28.5-38.8%。经济增长带来的健康状况改善预计将弥补人口和年龄分布变化的影响,从而导致除RCP8.5暴露和SSP3之外的所有情景下PM2.5造成的人均健康负担减少。气候变化情景下印度环境PM2.5暴露和过早死亡负担的调制尚不清楚。在这里,作者表明,在所有可能的气候变化和社会经济路径情景下,预计2100年过早死亡负担将比现在减少。
Premature mortality from current ambient fine particulate (PM2.5) exposure in India is large, but the trend under climate change is unclear. Here we estimate ambient PM2.5 exposure up to 2100 by applying the relative changes in PM2.5 from baseline period (2001–2005) derived from Coupled Model Inter-comparison Project 5 (CMIP5) models to the satellite-derived baseline PM2.5. We then project the mortality burden using socioeconomic and demographic projections in the Shared Socioeconomic Pathway (SSP) scenarios. Ambient PM2.5 exposure is expected to peak in 2030 under the RCP4.5 and in 2040 under the RCP8.5 scenario. Premature mortality burden is expected to be 2.4–4 and 28.5–38.8% higher under RCP8.5 scenario relative to the RCP4.5 scenario in 2031–2040 and 2091–2100, respectively. Improved health conditions due to economic growth are expected to compensate for the impact of changes in population and age distribution, leading to a reduction in per capita health burden from PM2.5 for all scenarios except the combination of RCP8.5 exposure and SSP3. Modulation of ambient PM2.5 exposure and premature mortality burden in India under climate change scenarios is unclear. Here the authors show that the premature mortality burden is projected to decrease in 2100 relative to present day under all possible combined climate change and socioeconomic pathways scenarios.
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发表时间: 2017-05-13
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