摘要
根据克拉玛依市1960—2009年高温日数资料,用线性趋势分析、最大熵谱等方法,分析高温日数的气候变化特征。结果表明:克拉玛依市高温日90%以上集中在6—8月,强高温和极端高温日数仅出现在6—8月;持续高温日≥7 d的高温期,平均每年发生一次;年高温初日50 a变化呈线性提早趋势,年高温终日50 a变化呈线性推迟趋势;高温日数的年代际和年际变化都比较大,特别是20世纪90年代中后期,克拉玛依市高温日数明显增多,且强度有所增强。
This article arranged the data of megathermal days from 1960 to 2009 in Kelamayi to find out climate characteristics of megathermal days by methods of linear tendency analysis and maximum entropy spectrum estimation. We obtained that： 90 percent of megathermal days were concentrated in June to August, moreover strong megathermal days and extreme megathermal days only appeared in June to August. Continuous megathermal periods not less than seven days took place once a year. The beginning date of annual high temperature presented linearly ahead trend and the ending date of annual high temperature was postponed linearly in recent 50 years. The interdecadal and interannual variations of megathermal clays were all bigger in Kelamayi; especially in the mid-late 1990s, the megathermal days significantly increased and its intensity was enhanced.
出处
《沙漠与绿洲气象》
2010年第5期27-30,共4页
Desert and Oasis Meteorology
关键词
高温日数
变化特征
高温期
megathermal days
variation characteristic
megathermal period
