1983—2012年华南中部可降水量变化特征分析

本文利用NCEP/NCAR逐月可降水量的再分析资料,选取1983年1月至2012年12月共360个时次的数据,分析华南中部可降水量的变化趋势。结果表明,近30年内华南中部的可降水量总体呈下降趋势;季节性变化明显,可降水量值呈夏高冬低趋势。

越冬代梨小食心虫发生期气象条件分析及气象服务平台建立

利用大连市金普新区2010—2017年梨小食心虫监测资料,对应新区气象台的气象要素,分析越冬代梨小食心虫发生期的气象条件。结果表明,气温11.4℃、相对湿度40%~60%的凌晨至早晨适宜越冬代梨小食心虫成虫的发生;自3月中旬开始,旬平均气温的累计值≥30℃的下一旬是越冬代梨小食心虫成虫的发生期。以此气象指标为依据,建立梨小食心虫气象服务平台。

Study on the Causes of Abnormal Weather in Winter in Jinzhou from 2009 to 2010

[Objective] The aim was to study the causes of abnormal weather in winter in 2009 and 2010 in Jinzhou. [Method] By dint of regular meteorological data and weather theory, the abnormal weather in winter from 2009 to 2010 in Jinzhou was expounded so as to find the reasons for abnormal climate in winter in the region. [Result] The main reason for the consecutive low temperature in winter in Jinzhou from 2009 to 2010 was the abnormal development of the Ural Mountains high-pressure ridge and strong horizontal circulation. The frequent cold air activity was the leading reason for the increase of precipitation in Jinzhou in winter; the high trough and low air torrent were the main weather system for precipitation. Convergence in the low layer was the dynamic condition for the generation of precipitation. [Conclusion] The study provided theoretical basis for the disaster prevention and mitigation work in winter.