| 南京细颗粒物对城市热岛强度的影响 |
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| 引用本文： | 吴昊,;王体健,;方欢,;马亚平,;韩永秋,;黄澍,;姚宇昂,;史均清.南京细颗粒物对城市热岛强度的影响[J].南京气象学院学报,2014(4):425-431. |
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| 作者姓名： | 吴昊 ;王体健 ;方欢 ;马亚平 ;韩永秋 ;黄澍 ;姚宇昂 ;史均清 |
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| 作者单位： | [1] 南京大学大气科学学院,江苏南京210093; [2] 南京外国语学校,江苏南京210008 |
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| 基金项目： | 大学生本科创新计划;国家重点基础研究发展计划项目（2010CB428503）;国家人才培养基金资助项目（J1103410） |
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| 摘 要： | 随着城市化和工业化进程的加快,南京城市热岛效应显著,细颗粒物污染加剧,对大气环境、气候变化和人体健康产生重要影响.本文基于观测资料,分析了南京市不同颗粒物浓度水平下城市热岛强度的变化特征;利用光学特性模型OPAC（optical properties of aerosols and clouds model）和辐射传输模型TUV（troposphere ultraviolet-visible model）估计了气溶胶的光学厚度及辐射强迫;定量分析了细颗粒物对城市热岛强度的影响及其可能机制.结果表明：南京城市热岛强度范围为-0.51.3K,冬季强于夏季.细颗粒物质量浓度范围为32 135 μg/m3,冬季高于夏季,城区和郊区差别不大;当大气中细颗粒物质量浓度较高时,城市热岛强度相对较弱;南京城郊气溶胶光学厚度变化范围为0.28 1.01,在地面产生的辐射强迫达-3.88-4.72 W＆#183;m-2;由于城区和郊区下垫面、人为热、细颗粒物浓度水平的差异,造成城郊近地面降温的不同,导致细颗粒物对城市热岛强度的削弱,夏季减弱0.1K,冬季减弱0.2K.
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| 关 键 词： | 城市热岛 气溶胶 细颗粒物 辐射强迫 南京 |
Impacts of aerosol on the urban heat island intensity in Nanjing |
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| Institution: | WU Hao, WANG Ti-jian, FANG Huan, MA Ya-ping, HAN Yong-qiu, HUANG Shu, YAO Yu-ang, SHI Jun-qing (1.School of Atmospheric Sciences,Nanjing University,Nanjing 210093 ,China; 2.Nanjing Foreign Language School, Nanjing 210008, China) |
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| Abstract: | With the rapid development of the urbanization and industrialization, heat island effect inNanjing has been more striking.The air pollution of particulate matters has a bad impact on the atmos-pheric environment,climate change and citizens.This paper analyses variation characteristics of heat is-land intensity under different particulate matters concentration levels with the observations in Nanjing.The OPAC （ optical properties of aerosols and clouds） and TUV （ troposphere ultraviolet-visible） modelsare used to calculate optical thickness and radiation forcing of aerosols as well as study the physicalmechanism of the aerosols affecting the heat island intensity.The heat island intensity of Nanjing ,whichis stronger in winter than in summer,changes between -0. 5 K and 1.3 K.The fine particle mass con-centration ranges from 32 to 135 p.g/m3, which is higher in winter than in summer.The aerosols have anextinction effect on the heat island.The higher aerosols mass concentration, the lower heat island intensi-ty.There is an apparent difference in different seasons.The optical thickness of aerosols in the suburb inNanjing changes between 0. 28 and 1.01 and the radiation forcing ranges from - 3.88 W · m-2 to-4. 72 W· m-2.Due to the differences of underlying surface, anthropogenic heat and particulate matterconcentration ,the surface temperature declines differently in urban and rural area.In general, the particu-late matter weakens the urban heat island as 0. 1 K in summer and 0. 2 K in winter. |
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| Keywords: | urban heat island aerosol fine particle radiation forcing Nanjing |
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