| 郭飞.基于WRF/UCM的城市气候高分辨率数值模拟研究[J].,2016,56(5):502-509 |
| 基于WRF/UCM的城市气候高分辨率数值模拟研究 |
| Urban climate high resolution numerical simulation research based on WRF/UCM |
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| DOI：10.7511/dllgxb201605010 |
| 中文关键词: WRF/UCM 城市气候 数值模拟 大连 |
| 英文关键词: WRF/UCM urban climate numerical simulation Dalian |
| 基金项目:国家自然科学基金资助项目(51278078,51308087)；中央高校基本科研业务费专项资金资助项目(DUT13RW306). |
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| 中文摘要: |
| 以沿海城市大连2015年7月3日2时至7月4日2时的晴朗高温天气为研究背景，利用WRF/UCM以1 km的高分辨率进行了城市气候数值模拟．结果表明 海风、山体对城市热岛有明显的缓解作用；中心城区受山地影响，形成了管道风效应；模拟期间城市热岛中心位于大连开发区一带，热岛强度最高达6.9 ℃，出现在2015年7月3日19时30分．将模拟结果与两个气象站和现场观测值进行了对比，发现模拟值与观测值变化趋势基本一致，地面温度场模拟结果优于风场模拟结果．温度场误差最大-3.10 ℃，最小0.08 ℃；平均误差最大 0.88 ℃，最小0.52 ℃；均方根误差最大1.23 ℃，最小0.63 ℃．对于大尺度的城市气候研究而言误差在可接受的范围之内．对相应的缓解城市热岛的城市规划策略也进行了初步探讨． |
| 英文摘要: |
| Choosing a sunny and high temperature day from 2:00, 3 July to 2:00, 4 July in 2015 as the research background, a 1 km high resolution numerical simulation for the urban climate in the coastal city of Dalian was implemented by WRF/UCM. The experimental results show that the wind from the sea and mountain can significantly moderate the UHI (urban heated island); the wind funnel effect is found in the urban center area caused by the mountain terrain. The UHI center with the maximum intensity reaching 6.9 ℃ is located in the Dalian Development Zone, appeared at 19:30 on 3 July, 2015. The simulation results are compared with the data from two weather stations and the field observation, it is found that the variation tendency of them is consistent. The accuracy of the surface temperature field is better than that of the wind field. The maximum bias of temperature is -3.10 ℃, the minimum is 0.08 ℃ the maximum mean bias of temperature is 0.88 ℃, the minimum is 0.52 ℃; the maximum RSME of temperature is 1.23 ℃, the minimum is 0.63 ℃. For a large-scale urban climate simulation, the deviation is within the acceptable range. The correspondent UHI moderation strategies for urban planning are also analyzed. |
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