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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Effect of precipitation seasonality on climatic sensitivity of glacier mass balance
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Effect of precipitation seasonality on climatic sensitivity of glacier mass balance

机译：降水季节对冰川物质平衡气候敏感性的影响

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摘要

Numerical calculations are described, aimed at evaluating the influence of precipitation seasonality and seasonality concentration on climatic sensitivity of glacier mass balance. Equilibrium line altitudes (ELAs) are modeled using idealized meteorological variables, and then a warming test (+ 1 degrees C) is performed, which revealed that the effects of latitude and the annual precipitation amount are less than those of precipitation seasonality and its concentration. Calculation shows higher sensitivities for the glaciers located in a summer-precipitation climate than for those located within a winter-precipitation climate. Difference due to seasonality is enhanced with the seasonality concentration. The present study suggests that the earlier parameterization of glacier mass balance with annual precipitation amount is insufficient to describe the response of glaciers to climate change. Distribution of precipitation seasonality and its concentration suggest that many parts of the world have a summer-precipitation climate but their seasonality concentration is not significant worldwide. On the other hand, an extensive region of Asia and part of the Andes are located in the highly concentrated summer-precipitation climate. This suggests the high sensitivity of glacier mass balance in these regions to climate change.
机译：描述了数值计算，旨在评估降水季节和季节浓度对冰川质量平衡的气候敏感性的影响。使用理想化的气象变量对平衡线高度（ELA）进行建模，然后进行变暖测试（+1°C），这表明纬度和年降水量的影响小于降水季节及其浓度的影响。计算表明，与处于冬季降水气候条件下的冰川相比，处于夏季降水气候条件下的冰川敏感性更高。随季节变化而增加的差异随季节变化而集中。本研究表明，冰川质量平衡与年降水量的早期参数化不足以描述冰川对气候变化的响应。降水季节的分布及其集中表明世界上许多地方都有夏季降水气候，但在世界范围内它们的季节集中并不显着。另一方面，亚洲的广大地区和安第斯山脉的部分地区处于高度集中的夏季降水气候中。这表明这些地区的冰川物质平衡对气候变化高度敏感。

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