【摘要】 本文利用NCEP/NCAR的逐月平均再分析资料,使用软件Panoply在create plot下读取air.mon.mean.nc数据,采取温度铅直梯度计算公式、距平、回归分析等方法,探究华南地区1984—2013年近30年地面100k Pa到高空25k Pa的温度铅直梯度变化与突变及其对降水量的影响,得出以下结论:(1)近30年华南地区温度铅直梯度变化反复,出现了由负距平到正距平再到负距平的波动;(2)近30年华南地区降水量距平与温度铅直梯度距平之间存在一定的相关性,降水距平与温度铅直梯度距平的变化在一定程度上同步起落;(3)在变化趋势的角度上,华南地区温度铅直梯度的变化特征与降水量的变化特征十分相似,降水量的变化与温度铅直梯度的变化基本同步起落.更多还原

【Abstract】 By using the monthly mean NCEP/NCAR reanalysis data, using Panoply software to read air.mon.mean.nc data in create plot, and taking the vertical temperature gradient formula, anomaly, regression analysis and other methods, this paper has explored the vertical temperature gradient change and mutation and its influence on precipitation from 1 000 h Pa to 250 h Pa in the Southern China area in 1984-2013. We can draw the following conclusions:(1) the vertical temperature gradient in Southern China area change repeatedly in the past 30 years. There is a negative anomaly to positive anomalies and to negative anomaly fluctuations;(2)the precipitation and vertical temperature gradient in Southern China area in recent 30 years has certain correlation. The precipitation and vertical temperature change synchronously in a certain extent;(3)from the angle of changes trend, the change characteristics of precipitation and the vertical temperature gradient in Southern China area is very similar. This paper provides reference for the understanding of vertical temperature gradient change in Southern China area and gives inspiration to study vertical temperature gradient effect on precipitation in other areas.更多还原