학술논문
元谋干热河谷区近60年干湿状况和气温变化特征分析 / Characteristic analysis of dry-wet condition and temperature trend in Yuanmou dry-hot valley (DHV) in recent 60 years
Document Type
Academic Journal
Author
Source
排灌机械工程学报 / Journal of Drainage and Irrigation Machinery Engineering. 36(2):172-178
Subject
Language
Chinese
ISSN
1674-8530
Abstract
为了探寻近60a干热河谷区干(平均湿度、相对湿度指数)热(气温)状况的变化特征,选取干热河谷区有代表性的元谋气象站采集的温度、湿度等微气象数据计算该地区参考作物腾发量和相对湿润指数,利用线性倾向估计法、Mann-Kendall法和滑动t检验法进行趋势和突变分析.结果表明:在年和四季尺度上,平均湿度呈上升趋势,四季平均湿度从大到小依次为夏季、秋季、冬季、春季,气候倾向率从大到小依次为冬季(1.99％/10 a)、春季(1.43％/10 a)、秋季(1.21％/10 a)、夏季(0.93％/10 a);四季平均气温和最低气温均呈现下降趋势,气温关系从高到低均为夏季、春季、秋季、冬季,气候倾向率关系从大到小均为春季、冬季、夏季、秋季;最高气温在春季最大且呈现微弱下降的趋势,年尺度和其他季度尺度上呈现上升趋势,冬季上升幅度最大.元谋干热河谷区朝着湿润降温的方向发展,干旱状况虽有所缓解,但依然严峻,冬季和春季是元谋抗旱的关键阶段.
In order to study the characteristics of the dry-hot conditions in recent 60 years in Yuanmou dry-hot valleys (DHV) area,the micro-meteorological data collected from the Yuanmou Meteorological Station were selected to calculate the reference crop evapotranspiration and relative moisture index.Trend and mutation were calculated and analyzed by linear propensity estimation method,Mann-Kendall method and sliding t-test method.The results show that the average humidity is increasing in the annual and seasonal scale,seasonal average humidity size is summer ＞ autumn ＞ winter ＞ spring.Climate tendency rate size is winter (1.99％/10 a) ＞ spring (1.43％/10 a) ＞ autumn (1.21％/10 a) ＞ summer (0.93％/10 a).The seasonal average temperature and the minimum temperature show a trend of decline,summer ＞ spring ＞ autumn ＞ winter.Climatic tendency rate in the following order:spring ＞ winter ＞ summer ＞ autumn.The maximum temperature in summer is the highest and the trend is decreasing.On the annual and other seasonal scales showed a trend of decline.The biggest temperature increases in spring.Yuanmou dry-hot valleys (DHV) area towards the direction of the development of wet and cooling,the drought situation has eased.The drought situation is still grim,spring and summer are the key stage of drought resistance.
In order to study the characteristics of the dry-hot conditions in recent 60 years in Yuanmou dry-hot valleys (DHV) area,the micro-meteorological data collected from the Yuanmou Meteorological Station were selected to calculate the reference crop evapotranspiration and relative moisture index.Trend and mutation were calculated and analyzed by linear propensity estimation method,Mann-Kendall method and sliding t-test method.The results show that the average humidity is increasing in the annual and seasonal scale,seasonal average humidity size is summer ＞ autumn ＞ winter ＞ spring.Climate tendency rate size is winter (1.99％/10 a) ＞ spring (1.43％/10 a) ＞ autumn (1.21％/10 a) ＞ summer (0.93％/10 a).The seasonal average temperature and the minimum temperature show a trend of decline,summer ＞ spring ＞ autumn ＞ winter.Climatic tendency rate in the following order:spring ＞ winter ＞ summer ＞ autumn.The maximum temperature in summer is the highest and the trend is decreasing.On the annual and other seasonal scales showed a trend of decline.The biggest temperature increases in spring.Yuanmou dry-hot valleys (DHV) area towards the direction of the development of wet and cooling,the drought situation has eased.The drought situation is still grim,spring and summer are the key stage of drought resistance.