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我国东北地区季节降雪高分辨率数值模拟

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Keywords: 东北,季节降雪,高分辨率模拟,WRF,物理过程,参数化方案

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Abstract:

利用WRF(WeatherResearchandForecasting)模式,进行了我国东北地区冬季降雪的高分辨率数值模拟,评估了WRF模式对季节降雪的模拟能力,并探讨了模式水平分辨率和物理过程参数化方案对降雪模拟的影响.结果显示WRF模式可以合理地模拟冬季气温和降水的空间分布,模拟结果和观测吻合较好.该模式可以合理地模拟东北地区季节降雪的空间分布和时间演变,显示了该模式较强的模拟性能.水平分辨率和物理过程参数化方案对降雪模拟有重要影响,高分辨率模拟结果更接近观测;相对于积云对流参数化方案,模式对陆面过程和微物理过程参数化方案更加敏感.

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