地理学报 ›› 2007, Vol. 62 ›› Issue (7): 717-727.doi: 10.11821/xb200707005

• 气候变迁 • 上一篇    下一篇

长江三角洲城市带扩展对区域温度变化的影响

谢志清1, 杜银2, 曾燕3, 施雅风3, 武金岗1   

  1. 1. 江苏省气象科学研究所, 南京210008;
    2. 南京大学大气科学系, 南京210093;
    3. 中国科学院南京地理与湖泊研究所, 南京210008
  • 收稿日期:2007-02-08 修回日期:2007-05-09 出版日期:2007-07-25 发布日期:2010-08-04
  • 作者简介:谢志清(1977-), 男, 硕士, 工程师, 主要从事气候变化和气象防灾减灾研究。E-mail: xiezhiqing9896@163.com
  • 基金资助:

    国家科技基础性工作专项资金项目(2005DKA31700-06-20); 江苏省自然科学基金项目(BK2005163); 中国气 象局气候变化专项(CCSF2006-32)

Impact of Urbanization on Regional Temper atur e Change in the Yangtze River Delta

XIE Zhiqing1, DU Yin2, ZENG Yan3, SHI Yafeng3, WU Jingang1   

  1. 1. Jiangsu Institute of Meteorological Sciences, Nanjing 210008, China;
    2. Department of Atmospheric Sciences, Nanjing University, Nanjing 210093, China;
    3. Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, China
  • Received:2007-02-08 Revised:2007-05-09 Online:2007-07-25 Published:2010-08-04
  • Supported by:

    Concentrated fund item of national science and technology foundation work, No.2005DKA31700-06-20; Jiangsu Natural Science Foundation, No.BK2005163; Special Fund from China Meteorological Administration, No.CCSF2006-32

摘要:

利用DMSP/OLS 夜间灯光数据、土地利用统计数据和气象站常规观测资料, 结合NOAA/AVHRR、MODIS 反演的月地表温度数据, 定量考察了长江三角洲城市群热岛增温效应对区域温度气候趋势的贡献, 结果表明: ① 1992-2003 年长江三角洲城市化经历了一个快速的空间扩展过程, 宁镇扬、苏锡常、上海大城市区、杭州湾4 个城市群构成了一个“之” 字形城市带, 城市群之间出现城市化连片趋势, 城市带区域内1961-2005 年年平均气温增温 速率为0.28~0.44 oC/10a, 显著高于非城市带区域。② 城市热岛效应对区域平均温度的影响以夏秋季最强, 春季次之, 冬季最弱。③ 长江三角洲城市带热岛强度和城市总人口对数呈线性正相关关系。④ 城市带增温效应使得区域的年平均气温在1961-2005 年间增加了0.072 oC, 其中1991-2005 年间增温幅度为0.047 oC; 年最高气温升高了0.162 oC, 其中1991-2005 年间 增温幅度为0.083 oC, 表明1991-2005 年间长江三角洲城市带的空间扩展正在改变区域温度变化趋势, 且这种增温趋势显著。

关键词: 长江三角洲, 城市热岛, 城市带, 城市化进程

Abstract:

Based on non-radiance-calibrated DMSP/OLS nighttime light imagery from 1992 to 2003, urban land area statistical data, meteorological data and land surface temperature data retrieved by MODIS and NOAA/AVHRR data, the influence of urbanization on regional climate trend of temperature in the Yangtze River Delta was analyzed. Conclusions are as follows: (1) There is a significant urbanization process from 1992 to 2003 in the Yangtze River Delta, and the annual mean air temperature increased at a rate of 0.28-0.44 oC/10a in mega city. (2) The urban heat island (UHI) effect on regional mean air temperature in different seasons is summer > autumn > spring > winter. (3) The UHI intensity and the urban total population logarithm are creditable correlated. (4) The UHI effect made the regional annual mean air temperature increased 0.072 oC from 1961 to 2005 and 0.047 oC from 1991 to 2005, and the annual maximum air temperature increased 0.162 oC and 0.083 oC from 1991 to 2005, all indicating that the urban expansion in the Yangtze River Delta from 1991 to 2005 may be regarded as a serious climate signal.

Key words: Yangtze River Delta, urban heat island, mega city, urbanization process