基于两个不同版本WRF模式的北极区域气候数值模拟—年平均结果

Numerical Simulations of Arctic Climate with Regional Atmospheric Models Based on Two Different Versions of WRF—Results of Annual Mean

摘要: 用基于WRF3.2.1和PWRF3.3.1的两个版本区域气候模式对北极气候进行了数值模拟试验，对比分析了两个版本模式对北极气候的模拟能力。结果显示：在温度场中，基于WRF3.2.1的气候模式模拟的结果偏低；在位势高度场中，两者的模拟结果均偏低，差异性较大的区域主要在维多利亚岛附近；海平面气压场中，基于WRF3.2.1的模式模拟的低值区域较大，没有基于PWRF3.3.1的模式模拟的结果好；两个模式风场差异伸展到高层并随高度的升高而风速差值增大，到200 hPa时风速差值最大为40 m/s；两者的降水模拟结果比较相似，对流性降水模拟的结果较好，对稳定性降水模拟的位置偏北且降水量偏大，对整体降水的模拟结果不好。在数值模拟试验中，基于PWRF3.3.1的气候模式整体显示出优于基于WRF3.2.1模式的性能。

Abstract: Numerical simulation test is made for Arctic climate with regional climate models based on WRF3.2.1 and PWRF3.3.1 versions, and simulation capabilities for Arctic climate of two versions are compared and analyzed. Ac- cording to results: within temperature field, simulation result of climate model based on WRF3.2.1 is relatively low; simulation result within potential height field is also relative low, and zones with larger difference are mainly around Victoria Island; within sea-level pressure field, for simulation based on WRF3.2.1 model, zone with low value is rela- tive large, and it is not as good as simulation based on PWRF3.3.1 model; Wind difference of both models exists up to high altitude, wind speed difference will increase with increasing of altitude, and max wind speed difference40m/s will be reached at 200 hPa; rainfall simulation results of both models are similar, simulation result for unsteady rainfall is relatively good, simulation result for steady rainfall shows position with northward difference and rainfall is relatively large, and rainfall simulation result in whole is not good. In numerical simulation test, performance of climate model based on PWRF3.3.1 is better than one based on WRF3.2.1 inwhole.