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Regional dynamical downscaling with CCLM over East Asia

机译：CCLM对东亚地区的动态降级

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摘要

Inspired by the framework of the Coordinated Regional Climate Downscaling Experiment (CORDEX), the hindcast (1971-2000) and projection (2021-2050) simulations based on a resolution of over the East Asia domain are performed with the regional climate model COSMO-CLM (CCLM). The simulations are driven by ERA-40 reanalysis data and output of the global climate model ECHAM5. This is the first time that the CCLM is adapted and evaluated for the East Asia Monsoon region; the setup is considered a starting point for further improvements in this region by the CCLM community. The evaluation results show that the CCLM is able to reasonably capture the climate features in this region, especially the monsoon dynamics on small scales. However, total precipitation in the northern part of the domain, over the Tibetan Plateau, and over east Indonesia has a pronounced wet bias. The projected climate change under the A1B scenario indicates an overall annual surface temperature increase of 1-2 K, but no significant precipitation changes.
机译：受协调的区域气候缩减实验（CORDEX）框架的启发，使用区域气候模型COSMO-CLM进行了基于东亚区域分辨率的后播（1971-2000）和投影（2021-2050）模拟（CCLM）。模拟是由ERA-40重新分析数据和全球气候模型ECHAM5的输出驱动的。这是章法委第一次对东亚季风地区进行适应和评估。该设置被CCLM社区视为对该区域进行进一步改进的起点。评价结果表明，章法委能够合理地捕捉该地区的气候特征，尤其是小尺度的季风动态。但是，该区域北部，青藏高原和印度尼西亚东部的总降水量明显偏湿。在A1B情景下，预计的气候变化表明全年地表温度总体升高1-2 K，但没有明显的降水变化。

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