A future of extreme precipitation and droughts in the Peruvian Andes

A future of extreme precipitation and droughts in the Peruvian Andes
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秘鲁安第斯山脉未来的极端降水和干旱

DOI:
10.1038/s41612-023-00409-z
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发表时间:
2023
影响因子:
9
通讯作者:
Potter E
Potter E
中科院分区:
地球科学1区
文献类型:
--
作者:
Potter E

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冰川覆盖的安第斯河流域的径流对维持数百万人的生计至关重要。通过在秘鲁两个冰川覆盖最广的地区运行高分辨率气候模型,我们揭示了过去降水和温度的气候趋势。未来的变化是由统计上缩小比例的全球气候模式的集合确定的。在高排放情景下的预估表明,到21世纪末,这两个地区的气温将大幅上升3.6°C和4.1°C,同时降水将增加12%。至关重要的是,极端降水的显著增加(在非常潮湿的日子里,总降水量约为75%)与蒸散发增加引起的气象干旱加剧同时发生。尽管降水增加,但在最高排放和稳定排放情景下,冰川质量损失都增加了。我们的模型提供了一个新的综合和对比的风险预测,在一个地区已经经历了快速的环境变化。
Runoff from glacierised Andean river basins is essential for sustaining the livelihoods of millions of people. By running a high-resolution climate model over the two most glacierised regions of Peru we unravel past climatic trends in precipitation and temperature. Future changes are determined from an ensemble of statistically downscaled global climate models. Projections under the high emissions scenario suggest substantial increases in temperature of 3.6 °C and 4.1 °C in the two regions, accompanied by a 12% precipitation increase by the late 21st century. Crucially, significant increases in precipitation extremes (around 75% for total precipitation on very wet days) occur together with an intensification of meteorological droughts caused by increased evapotranspiration. Despite higher precipitation, glacier mass losses are enhanced under both the highest emission and stabilization emission scenarios. Our modelling provides a new projection of combined and contrasting risks, in a region already experiencing rapid environmental change.
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发表时间: 2016-01-01
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