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利用MM5与CALMET模拟了北京地区10、30、50和70m高度的风速和风功率密度分布,结果表明:各高度层风速与风功率密度的地域分布具有一致性,模拟的风速最大区位于门头沟西北部,而昌平西部、房山北部及延庆西部的风速次之,风速最小区位于顺义和东部城区;风功率密度的模拟显示京西地区和西北部地区的风资源较为丰富,北京东部、东南部和东北部及市区周边的风资源相对较小,开发潜力低。利用3座测风塔和3个气象站风速观测数据对模拟结果进行了初步检验,表明MM5与CALMET基本能模拟出风速的月变化和日变化特征,模拟和观测具有较好相关性,但模式存在对黄草梁和北梁地区模拟结果偏高、对涧沟地区模拟结果偏低的系统性误差,这可能与模拟区域地形复杂及模式自身分辨率不够等有关。
The wind speed and wind power density distributions at 10, 30, 50 and 70m height in Beijing are simulated by MM5 and CALMET. The results show that the geographical distribution of wind speed and wind power density is consistent. The maximum wind speed is located in the northwest of Mentougou , While the wind speeds in the west of Changping, the northern part of Fangshan and the west of Yanqing are the second, with the lowest wind speed located in Shunyi and the eastern part of the city. The simulation of wind power density shows that the wind resources in the western Beijing area and the northwest area are abundant, and the east, southeast and northeast of Beijing Wind resources around the ministries and urban areas are relatively small with low development potential. The wind speed data from three wind towers and three weather stations were used to test the simulation results. The results show that MM5 and CALMET can basically simulate the monthly and seasonal variation of wind speed, and the correlation between simulation and observation is good. However, There is a systematic error that results in high simulation results for Huangcao Liang and Beiliang area and low simulation results in Jianjiaogou area, which may be related to the complex topography of the simulated area and the insufficient resolution of the pattern itself.