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首页> 外文期刊>Atmosphere >Analysis of the Joint Link between Extreme Temperatures, Precipitation and Climate Indices in Winter in the Three Hydroclimate Regions of Southern Quebec
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Analysis of the Joint Link between Extreme Temperatures, Precipitation and Climate Indices in Winter in the Three Hydroclimate Regions of Southern Quebec

机译：魁北克南部三个水文气候区冬季极端温度，降水和气候指数之间的联合联系分析

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摘要

We analyze the relationship between four climate variables (maximum and minimum extreme temperatures, rainfall and snowfall) measured in winter (December to March) at 17 stations from 1950 to 2000 in the three hydroclimate regions of southern Quebec, and six seasonal climate indices using canonical correlation analysis (CCA) and the copula method. This analysis yielded these major results: (1) extreme temperatures are not correlated with the amount of winter rain or snow in southern Quebec; (2) winter seasonal climate indices show better correlations with climate variables than do fall climate indices; (3) winter extreme temperatures are best correlated (positive correlation) with the Atlantic Multidecadal Oscillation (AMO) in the eastern region, but show a negative correlation with the Arctic Oscillation (AO) in the southwestern region; (4) the total amount of winter snow is best correlated (negative correlation) with the Pacific Decadal Oscillation (PDO) in the three hydroclimate regions; (5) the total amount of winter rain is best (negatively) correlated with PDO in the eastern region, but shows a positive correlation with AO in the southeast region. Finally, the copula method revealed very little change in the dependence between climate indices and climate variables in the three hydroclimate regions.
机译：我们分析了魁北克南部三个水文气候地区从1950年至2000年在冬季（12月至3月）在17个站点测得的四个气候变量（最高和最低极端温度，降雨量和降雪）之间的关系，以及使用典范的六个季节气候指数之间的关系。相关分析（CCA）和copula方法。该分析得出以下主要结果：（1）极端温度与魁北克南部的冬季降雨或降雪量无关; （2）冬季季节性气候指数与气候变量的相关性比秋季气候指数更好。 （3）冬季极端温度与东部地区的大西洋多年代际涛动（AMO）最佳相关（正相关），但与西南地区的北极涛动（AO）呈负相关; （4）在三个水文气候区，冬季降雪总量与太平洋年代际涛动（PDO）最佳相关（负相关）; （5）东部地区冬季降水总量与PDO的相关性最好（呈负相关），而与东南地区的AO呈正相关。最后，copula方法揭示了三个水文气候区气候指数与气候变量之间的依存关系变化很小。

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