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潍坊市1955—2014年气温日较差变化特征及影响因子分析 被引量:13

Analysis of Change Features and Influence Factors of the Daily Temperature Ranges from 1955 to 2014 in Weifang City
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摘要 为了揭示潍坊市气温日较差的演变规律和特征,利用1955—2014年潍坊市最高、最低气温及与日较差相关的日照、云量、风速等气象要素进行分析。结果表明:近60年来,潍坊市气温日较差呈显著下降趋势,倾向率-0.11℃/10 a。季、年日较差的年代际最大值均出现在1990s,最小值出现在2010s;春季日较差最大,夏季最小,四季日较差均呈减小趋势,夏季减小幅度最大,秋季最小;1—12月气温日较差呈波状分布,5月最大,8月最小,各月气温日较差多呈下降趋势,5月下降幅度最大,7月最小;季、年平均气温日较差在随时间变化过程中均不存在显著突变。最高、最低气温的非同步变化是日较差减小的主要原因,气温日较差与最高气温、日照时数、日照百分率、风速呈显著正相关,与最低气温、总云量、降水量呈显著负相关,与相对湿度几乎不相关,日较差与各气象因子的关联程度随季节不同而异。 In order to reveal the evolvement rule and features of the daily temperature range in Weifang City,the highest and lowest temperature and many meteorological factors like sunshine duration, cloud amount,wind speed and so on from 1955 to 2014 were analyzed. The results showed that: in recent 60 years, the dailytemperature range was obvious declining. The rate of inclination was- 0.11℃/10 a. The maximum value ofinter-decadal daily temperature range among seasons and years appeared in 1990 s, and the minimum valueappeared in 2010 s. The daily temperature range was the biggest in spring and autumn, and the smallest insummer. Among four seasons, the daily temperature range was also declining, and the decreasing range was thebiggest in summer and the smallest in autumn. From January to December, the daily temperature ranges weredistributed in a fluctuating way; it was the biggest in May, and the smallest in August. The daily temperatureranges in all months were mostly declining; the decreasing range was the biggest in May and the smallest inJuly. The average daily temperature ranges among seasons and years did not have sudden changes in thechanging process along with the time. The highest temperature and the lowest temperature not changingsynchronously was the main reason for the decreasing of daily temperature range. The daily temperature waspositively correlated with the highest temperature, sunshine duration, sunshine percentage and wind speed,and negatively correlated with the lowest temperature, total cloud amount, and amount of precipitation. It wasnearly not correlated with humidity. The correlative extent between the daily temperature range and each
作者 高学芹
机构地区 寿光市气象局
出处 《中国农学通报》 2015年第35期204-208,共5页 Chinese Agricultural Science Bulletin
基金 潍坊市气象局气象科学技术研究项目"潍坊市气候变化对农业的影响及应对措施"(2014wfqxkt11)
关键词 气温日较差 变化特征 气象因子 相关性 daily temperature range change feature meteorological factor correlation
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