摘要
为分析全球气候变化下藏北高原主要气象要素的变化特征,采用趋势分析、小波分析、突变点分析等研究方法,利用逐月站点气象数据,分析了1973—2017年藏北高原地区的主要气象要素的多尺度时间变化特征。结果表明:在全球气候变化下藏北高寒牧区的各主要气象要素变化显著,其中气温以0.45℃/10 a速率显著的升高,风速以-0.27 m/(s·10 a)速率呈极显著减小趋势,降水以6.48 mm/10 a速率呈不显著增加趋势;从季节变化来看,春季较为特殊,表现为增温缓慢、风速减幅最大、降水增加最为显著等特点,其他季节在各要素上变化较为均匀;周期变化上在去除显著的全球变暖的线性趋势后气温和降水都存在显著的准3年周期变化,且在发生时域上有互补特征。
To analyze the variation characteristics of main meteorological elements in the northern Tibetan Plateau under the global climate change, the trend analysis, wavelet analysis and mutational point analysis were used to study the multi-scale time-varying characteristics of the elements based on the monthly meteorological data. The results showed that: under the global climate change, the major meteorological elements in the study area changed significantly, and the temperature increased significantly at a rate of 0.45°C/10 a, and the wind speed decreased significantly at a rate of-0.27 m/(s·10 a), and the precipitation increased insignificantly at a rate of 6.48 mm/10 a;from the seasonal changes, the spring change was more special, which was characterized by the slowest temperature increase, the largest decrease of wind speed and the most significant increase in precipitation, the other seasons were more uniform in each factor. In the cyclical change, there was a significant quasi-3 period change in temperature and precipitation after removing the linear trend of significant global warming, and there was a complementary feature in the occurrence time domain.
作者
次央
洛桑平措
罗布
Ci Yang;Luo Sangpingcuo;Nor Bu(Climate Center of Tibet Autonomous Region,Lhasa 850000;Tibet Autonomous Region Atmospheric Detection Technology and Equipment Support Center,Lhasa 850000)
出处
《中国农学通报》
2020年第7期99-104,共6页
Chinese Agricultural Science Bulletin
基金
国家自然科学基金项目“基于多源卫星数据藏北高原地表温度与湿地变化特征研究”(41665002)
自治区重点科技计划“藏北典型生态区生态环境遥感监测评估”(XZ201703-GA-01)
中国气象局成都高原气象研究所开放基金项目“利用遥感资料反演藏西北高寒牧区草地陆面温度”(LPM2014005).
关键词
藏北高原
高寒牧区
主要气象要素
变化趋势
周期变化
the northern Tibet plateau
alpine pastoral areas
major meteorological elements
changing trend
cyclical change
