Time trends of daily maximum and minimum temperatures in Catalonia (ne Spain) for the period 1975–2004
Time trends of daily maximum and minimum temperatures in Catalonia (ne Spain) for the period 1975–2004
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DOI：
10.1002/joc.1884
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发表时间：
2009-02
期刊：
影响因子：
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通讯作者：
M. Martínez;C. Serra;August BurgueÒo;X. Lana
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文献类型：
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作者：
M. Martínez;C. Serra;August BurgueÒo;X. Lana
分析了加泰罗尼亚(西班牙东北部)37个测站的日最高和最低气温Tmax、Tmin以及日较差DTR，以找出1975-2004年间显著的日时间趋势。用标准正态均匀度、Buishand极差和派提特检验法对序列的均质性进行检验。通过冯·诺依曼比率检验，还研究了该序列的随机性不足，这表明了时间趋势。得到的日时间趋势及其空间和时间模式与最近得出的北半球总体时间趋势基本一致。结果表明，Tmax和Tmin(0.5℃/十年)总体上呈逐年增加的趋势，春季和夏季尤为显著，达0.8-0.9℃/十年，冬季Tmax(0.7℃/十年)也较为显著。然而，在秋季，平均趋势是Tmax(−0.5C/十年)下降。结果表明，地面温度呈逐年下降的趋势，尤其是在秋季(−为0.90℃/十年)。在春季和夏季，观测和分析了几个具有显著正时间趋势的站点数量显著的时段，无论是日Tmax还是Tmin。唯一出现显著负趋势的时段是2月份，这意味着在这个短暂的冬季期间，DTR有显著的增加趋势。与大尺度和区域温度趋势进行了比较，关注了西地中海大气动力学的变化。版权所有(C)2009皇家气象学会
Daily maximum and minimum temperatures, Tmax and Tmin, and diurnal temperature range, DTR, from 37 temperature stations in Catalonia (NE Spain) are analyzed to detect significant daily time trends for the period 1975–2004. The homogeneity of the series is tested by means of the Standard Normal Homogeneity, the Buishand range and the Pettitt tests. The lack of randomness of the series, suggesting time trends, is also investigated by means of the Von Neumann ratio test. The daily time trends obtained and their spatial and temporal patterns are mainly in agreement with overall time trends recently derived for the Northern Hemisphere. The results indicate generalized increasing annual trends of daily Tmax and Tmin (0.5 °C/decade), especially relevant in spring and summer, with values reaching 0.8–0.9 °C/decade, and also remarkable for Tmax in winter (0.7 °C/decade). In autumn, however, average trends point at a decrease in Tmax (−0.5 °C/decade). As a result, an average annual decreasing trend of DTR is found, particularly relevant in autumn (−0.9 °C/decade). Several periods with an outstanding number of stations showing significant positive time trends are detected and analyzed during the spring and summer seasons both for daily Tmax and Tmin. The only period with a relevant number of significant negative trends is detected in February for daily Tmin, thus implying a significant increasing trend of DTR during this short winter period. Comparisons are established with large‐ and regional‐scale temperature trends, paying attention to the west Mediterranean atmospheric dynamics change. Copyright © 2009 Royal Meteorological Society