Precipitation scaling with temperature in warm and cold climates: An analysis of CMIP5 simulations
Precipitation scaling with temperature in warm and cold climates: An analysis of CMIP5 simulations
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DOI：
10.1002/grl.50730
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发表时间：
2013-08
影响因子：
5.2
通讯作者：
Guangqi Li;S. Harrison;Patrick J. Bartlein;K. Izumi;I. Colin Prentice
中科院分区：
文献类型：
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作者：
Guangqi Li;S. Harrison;Patrick J. Bartlein;K. Izumi;I. Colin Prentice
我们使用六个模型研究了温暖和寒冷气候下降水和温度变化之间的比例关系，这些模型模拟了对二氧化碳增加和末次盛冰期 (LGM) 边界条件的响应。全球范围内，温暖气候下降水量增加，寒冷气候下降水量减少 1.5%/°C 至 3%/°C 之间。陆地降水对温度变化的敏感性低于海洋，热带陆地低于温带陆地，反映了可用水量的限制。潮湿的热带地区在温暖的气候下变得更加湿润，在寒冷的气候下变得更加干燥，但干燥地区的变化因模型而异。温暖世界中热带降水的季节变化也反映了这种“富者愈富”的现象。寒冷气候状态下降水季节性减弱。每度温度变化的降水量模拟变化与历史时期和末次盛冰期观测到的变化相当。
We investigate the scaling between precipitation and temperature changes in warm and cold climates using six models that have simulated the response to both increased CO2 and Last Glacial Maximum (LGM) boundary conditions. Globally, precipitation increases in warm climates and decreases in cold climates by between 1.5%/°C and 3%/°C. Precipitation sensitivity to temperature changes is lower over the land than over the ocean and lower over the tropical land than over the extratropical land, reflecting the constraint of water availability. The wet tropics get wetter in warm climates and drier in cold climates, but the changes in dry areas differ among models. Seasonal changes of tropical precipitation in a warmer world also reflect this “rich get richer” syndrome. Precipitation seasonality is decreased in the cold‐climate state. The simulated changes in precipitation per degree temperature change are comparable to the observed changes in both the historical period and the LGM.