| 成都城市化发展对局地气候的影响 |
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| 引用本文： | 赵旋,吴遥,冯勇,舒建川.成都城市化发展对局地气候的影响[J].高原山地气象研究,2021,41(4):100-107. |
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| 作者姓名： | 赵旋 吴遥 冯勇 舒建川 |
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| 作者单位： | 1.中国气象局成都高原气象研究所/高原与盆地暴雨旱涝灾害四川省重点实验室, 成都 610072 |
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| 基金项目： | 中国气象局成都高原气象研究所基本科研业务专项（BROP202010）；国家自然科学基金面上项目（42075045）；干旱气象科学研究基金项目（IAM201809） |
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| 摘 要： | 为研究成都地区城市化对局地气候的影响，利用新一代中尺度数值模式WRF，将不同时期下垫面土地利用类型作为控制试验和敏感试验的模拟条件，探讨了下垫面改变对成都市夏季和冬季城市化效应的影响。结果表明:城市下垫面对夏季中心城区的地表气温升高有显著影响，敏感性试验表明，下垫面的改变引起成都地区夏季28℃以上的高温区域扩大并向东北和西南扩张，且城区的外扩导致周边区域地表气温升高。冬季成都地区常为多云天气，能到达地面的太阳辐射较夏季大大减小，城市化导致的升温作用没有夏季显著。城市化作用使城市上风区降水量以减少为主，下风区降水量以增多为主，城市化使得发生强降水的概率增加，并且强降水在空间分布上更集中在城市下风区。
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| 关 键 词： | 城市化 下垫面 局地气候 数值模拟 |
| 收稿时间： | 2021-08-04 |
Influence of Chengdu Urban Development on Local Climate |
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| Affiliation: | 1.Institute of Plateau Meteorology, CMA, Chengdu / Heavy Rain and Drought - Flood Disaster in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu 610072, China2.Chongqing Climate Centre , Chongqing 401147, China |
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| Abstract: | In order to study the impact of urbanization on local climate change in Chengdu, a series of numerical simulation experiments were carried out by using Weather Research and Forecasting model (WRF). Land use and soil categories were changed in the simulation to reflect the different situations. The effects of underlying surface changes on urbanization in Chengdu in summer and winter were discussed. The results show that Urbanization has a significant impact on the increase of surface temperature in summer. The sensitivity test shows that the underlying surface changing causes the expansion of the high temperature above 28℃ in summer in Chengdu and the expansion to the northeast and southwest, and it leads to the increase of surface temperature in surrounding areas of Chengdu. Chengdu is always cloudy and rainy in winter, so the solar radiation reaching the ground is greatly reduced than that in summer. The warming effect caused by urbanization is less significant than that in summer. Under the influence of urbanization, daily average precipitation is decreased in the upstream areas and increased in the downstream areas of the city. Urbanization increases the probability of extreme precipitation, in addition, the distribution of extreme precipitation is more concentrated to the downstream areas of the city. |
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