摘要
在分析1967-2007年广东7月高温日数气候特征及其异常年份同期大气环流、夏季风以及经向环流等因子特征的气候背景下，探讨了2007年7月广东大范围持续高温的原因。结果表明，2007年7月广东大范围高温的大气环流具有典型高温日数异常多年的环流特征，东亚阻高偏强，副热带锋区偏南，抑制副热带高压北抬，使得华南受其控制，以下沉气流为主，从而导致高温日数出现正异常。城市化效应对夏季高温的影响已逐步加大，且近十几年来城市化进程明显加快，其影响已不容忽视。
Based on the statistical analysis and the correlation between high temperature days and synchronous circulation, summer monsoon, and meridional circulation in Guangdong from 1967 to 2007, the long endurance Of the high temperature event in July 2007 is studied. Results show that the circulation in July 2007 exhibited the typical features of high-frequency years of high temperature, with the intensified East Asia blocking high, southward extension of subtropical frontal zone, and persistent control of subtropical high over South China, which led to the significant positive anomaly of the number of high temperature days. The urbanization effect on summer maximal temperature increased gradually and speeded up significantly in the last decade. The urbanization effect should be put into consideration in the study of summer high temperatures.
出处
《气象科技》
2008年第6期734-739,共6页
Meteorological Science and Technology
基金
广东省科技厅项目(2005B32601008)资助
关键词
高温日数
异常
大气环流
城市化
high temperature frequency, anomaly, atmospheric circulation, urbanization
