On the evidence of orographical modulation of regional fine scale precipitation change signals: The Carpathians,Atmospheric Science Letters

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On the evidence of orographical modulation of regional fine scale precipitation change signals: The Carpathians
Atmospheric Science Letters ( IF 2.0 ) Pub Date : 2020-03-20 , DOI: 10.1002/asl.967
Csaba Torma ₁ , Filippo Giorgi ₂

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This study investigates the greenhouse gas‐induced winter and summer precipitation change signals over the Carpathian region with special focus on topographical effects and underlying processes. Six high‐resolution (~12 km grid spacing) regional climate model projections are analyzed for the future period 2070–2099 with respect to the reference period 1976–2005 under the RCP8.5 scenarios. We find that the topographically induced fine scale modulation of the precipitation change signal is mostly of dynamical nature in winter (due to the precipitation shadowing effect), and thermodynamical in summer (associated with high elevation convection) over the region of interest. Additionally, elevation, size, and orientation of mountains play key roles in such processes. Our results draw attention to the fact that the high‐resolution representation of topography in climate models is crucial for the provision of fine scale precipitation projections in mountainous regions.

中文翻译：

关于区域精细尺度降水变化信号的地形调制证据：喀尔巴阡山脉

这项研究调查了喀尔巴阡地区温室气体引起的冬季和夏季降水变化信号，特别关注了地形影响和潜在过程。在RCP8.5情景下，相对于1976-2005年的参考期，分析了2070-2099年未来期的六个高分辨率（约12 km网格间距）区域气候模型预测。我们发现，地形变化引起的降水变化信号的精细尺度调制主要在冬季（由于降水遮蔽效应）具有动力学性质，而在夏季则在感兴趣区域内具有热力学性质（与高海拔对流有关）。此外，山脉的海拔，大小和方向在此类过程中也起着关键作用。

更新日期：2020-03-20

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