城市化进程对珠江三角洲地区气温变化的影响

Impact of Urbanization on Air Temperature Change in Pearl River Delta

根据1979—2010年珠江三角洲24个气象站的气温观测数据以及NCEP/NCAR R1地表气温再分析月资料,运用OMR(observation minus reanalysis)方法分析了珠三角地区平均气温、平均最高气温、平均最低气温的年、季变化趋势。研究结果表明,过去32年珠三角大部分地区呈增温趋势,年平均气温、年平均最高气温、年平均最低气温的OMR趋势分别为0.22/10a、0.19℃/10a、0.23℃/10a,对珠三角地区观测气温增暖的贡献率分别为55.7%、41.7%、57.2%;四季OMR增温趋势冬季最大,夏秋季较小。城市化对区域平均最低气温的影响比对平均最高气温的影响更大。

Based on the homogenized observed daily air temperatures from 24 meteorological stations and the NCEP/ NCAR reanalysis （R1） air temperature monthly data from 1979 to 2010, the urbanization effect on air temperature changes in the Pearl River Delta region was analyzed by using the observation minus reanalysis （OMR） method. Results indicate that urbanization has significant contribution to the warming in the Pearl River Delta region, especially in winter. The annual mean/maximum/minimum temperature in the Pearl River Delta region increased at a rate of about 0.22 ℃/10a, 0.19 ℃/10a, 0.23℃/10a in 1979-2010, accounting for 55.7%, 41.7%, 57.2% of the total warming, respectively. Moreover, the urbanization effect is more obvious on minimum temperature than on maximum temperature.