海口市高温天气气候背景及其预报浅析
Analysis on Climate Background and Forecast of High Temperature Weather in Haikou
中文摘要：
近年来，海口市高温天气频发。对近60年海口市高温天气气候特点及其环流背景进行分析，探讨高温天气的变化特征及主要影响天气系统，寻求海口市高温天气预报思路。研究结果表明，海口市高温天气主要出现在5—7月，其次是4月、8月和3月，2月和9月极少出现高温天气，其他月份几乎不出现异常高温天气；近60年海口市高温指数总体趋于缓慢增多，其趋势变率约为0.042 d/a。通过定义月高温影响指数综合判定指标，表明7月高温影响最大，其次是6月和5月。通过对高温天气主要影响系统分析看出，西太平洋副热带高压、低压槽、南亚高压以及近海海温变化对海口市高温天气有明显影响；当有热带气旋生成并影响海口市时，其影响前外围下沉气流也是海口高温天气的主要成因之一。
中文关键词：
高温，气候趋势，副高，海温
KeyWords：
high temperature, climate trends, subtropical high, sea temperature
Abstract：
In recent years, Haikou City has experienced frequent high-temperature weather. This paper analyzes the characteristics of high temperature weather and climate in Haikou City and its circulation background in the past 60 years. Discuss the changing characteristics of high temperature weather and the main influence on weather systems, in order to seek the ideas of high temperature weather forecast in Haikou City. Research indicates, the high temperature weather in Haikou City mainly occurs from May to July, followed by April, August and March, there are very few high-temperature weather in February and September, and almost no abnormally high-temperature weather in other months; In the past 60 years, the high temperature index of Haikou City has generally tended to increase slowly, and its trend rate of change is about 0.042 d/a. By defining the comprehensive judgment index of the monthly high temperature impact index, it shows that the high temperature impact is the largest in July, followed by June and May. Through the systematic analysis of the main effects of high temperature weather, it can be seen that. The western Pacific subtropical high, low-pressure trough, South Asian high, and offshore sea temperature changes have a significant impact on the high temperature weather in Haikou City; When a tropical cyclone generates and affects Haikou City, its impact on the subsiding airflow in the front periphery is also one of the main causes of the high temperature in Haikou.