汉中市48年来气候变化特征及原因分析  

Characteristics and Reasons of Climate Change in Hanzhong City in Recent 48 Years

作　　者：宋佃星[1] 

机构地区：[1]宝鸡文理学院 陕西省灾害监测与机理模拟重点实验室,陕西宝鸡721013

出　　处：《江西农业学报》2013年第8期93-97,共5页Acta Agriculturae Jiangxi

基　　金：国家自然科学基金"秦岭南北全球变化适应度评价及可持续发展模式选择"(40871052);宝鸡文理学院重点项目(ZK12052)

摘　　要：基于1960～2007年汉中市气象观测站9个站点逐月平均气温、极端最高气温、极端最低气温、降水量、日照时数等资料,运用回归分析、趋势分析、相关性分析的方法,探讨48年来汉中气象要素的变化趋势及其原因。结果表明:48年来汉中市年平均气温以0.14℃/10年的速率升高,与全国其他地区比较,汉中市的增暖幅度较为缓慢;年极端高温和极端低温都出现了逐渐增高的趋势,与陕西省极端气温变化趋势一致;年降水量以31.52 mm/10年的速率逐年显著减少;相对湿度以0.14%/10年的趋势缓慢增大;日照时数以49.39 h/10年的速率减少。汉中市气候变化是自然和人为共同作用的结果,人为驱动因子作用显著。According to the data of monthly average temperature, extreme maximum temperature, extreme minimum tempera- ture, precipitation and sunshine hours of 9 weather stations in Hanzhong city from 1960 to 2007, the characteristics and reasons of climate change in Hanzhong city in recent 48 years were analyzed by regression analysis, trend analysis, and correlation analysis methods. The results indicated that the annual average temperature increased by 0.14 ℃/10 a in recent 48 years, and the warming range in Hanzhong was slower than that in other areas of China. Both annual extreme maximum temperature and annual extreme min- imum temperature presented the trend of increasing, and this trend was consistent with the changing trend of extreme temperature in Shaanxi province. Annual precipitation significantly reduced by 31.52 mm/10 a; relative humidity slowly increased by 0.14%/10 a; sunshine hours reduced by 49.39 h/10 a. The climate changes in Hanzhong city was caused by the combined action of nature and human being, but the role of human being was more obvious.

关 键 词：汉中 气象要素 气候特征 变化 

分 类 号：P468[天文地球—大气科学及气象学]