摘要
气候变化的事实是客观存在的,但具有区域性特征。利用遵义市1961-2008年的气温、降水和日照资料,采用气候倾向率、趋势系数和累积距平法,研究了遵义市区域气候变化的时空分布特征及其演变趋势。结果表明,近48a来遵义市气温总体呈显著上升趋势,但存在季节和地域差异,增温主要表现在2月和11月(P<0.05),而7、8月的气温呈显著的下降趋势(P<0.05),其它月份趋势不明显(P>0.05);从地域上看,增温最显著的是中心城区、湄潭和务川,赤水、余庆气温略有下降。由于冬季增暖明显而夏季出现降温导致全区气温年较差减少。全区各季降水量的变化趋势不明显(P>0.05)。全区日照时数呈显著减少趋势(P<0.05),其中夏季日照时数的减少最突出。气象观测场周边环境的改变和人类活动对增温趋势和日照时数的减少有一定的影响。
Climate change is a objective reality,but varies in different regions. By using climate variability,trend coefficient and accumulative anomaly method,temperature,precipitation and sunshine-based characteristics and tendency of climate change in Zunyi City dating from 1961 to 2008 were measured. The results showed that the temperature had an increasing tendency in the recent 48 years with seasonal and regional diversity,mainly in February and November （P〈0.05）. But in July and August,the temperature had an obvious decreasing tendency （P〈0.05）,and in other months,there was no obvious change （P〉0.05）. The temperature in urban areas,Meitan and Wuchuan had an increasing tendency,but that in Chishui and Yuqing had a decreasing tendency. Increasing temperature in winter and decreasing temperature in summer resulted in a year-by-year drop trend of the annual mean temperature in the whole region. There was no obvious precipitation change tendency （P〉0.05）,but there was a marked decrease tendency of sunshine duration （P〈0.05）in the whole region,especially in summer. The changing environment around the meteorological observing station and human activities also influenced the change of temperature and sunshine duration.
出处
《中国农业气象》
CSCD
2010年第2期194-199,共6页
Chinese Journal of Agrometeorology
基金
遵义市科学技术项目"突发气象灾害预测技术及应急信息共享研究"(遵市科合农字200904号)
关键词
遵义
气候变化
气温
降水量
日照时数
Zunyi
Climate change
Temperature
Precipitation
Sunshine duration
