2008年7月23～28日广东省揭阳市一次高温过程分析

利用各种大气探测资料，采用动力学和热力学原理，从环流背景、主要影响系统、物理量等方面对2008年7月23～28日广东省揭阳市一次高温过程进行分析。结果表明，广东省夏季出现的高温天气多是由副高加强西伸造成的，此次高温并不仅仅是因为副高主体控制，揭阳市高温过程中台风外围下沉增温的影响也起主要作用；前期受大陆副高的控制，吹弱的西南风，有下沉运动，后期受副高和热带气旋外围偏北下沉气流的共同影响，也是下沉运动。日照时数维持在较大的数值而又没有明显的降水，也是导致此次高温形成的原因。高温结束于台风“凤凰”的外围环流和西南季风作用的降水。

Analy sis on a High Temperature Process in Jieyang City,Guangdong Province during July 23-28, 2008

Using various atmospheric sounding data, adopting kinetic and thermodynamic principles, a high temperature process in Jieyang City, Guangdong Province during July 23-28, 2008 was analyzed from aspects of circulation background, main influence system, physical quantity. The results showed that high temperature in summer in Guangdong Province appeared mainly caused by the westward extension of subtropical high, in this process of high temperature, temperature increase in the periphery of the typhoon had also played a major role.The longer duration of sunshine without significant precipitation was also the cause of the formation of high temperature.High temperature end in the typhoon "phoe-nix"peripheral circulation and precipitation of southwest monsoon.