{"id":4058,"date":"2012-09-22T19:53:00","date_gmt":"2012-09-22T23:53:00","guid":{"rendered":"http:\/\/ccli.machinedev.ca\/resource\/a-second-generation-of-homogenized-canadian-monthly-surface-air-temperature-for-climate-trend-analysis\/"},"modified":"2021-11-02T15:27:06","modified_gmt":"2021-11-02T19:27:06","slug":"a-second-generation-of-homogenized-canadian-monthly-surface-air-temperature-for-climate-trend-analysis","status":"publish","type":"resource","link":"https:\/\/ccli.ubc.ca\/fr\/resource\/a-second-generation-of-homogenized-canadian-monthly-surface-air-temperature-for-climate-trend-analysis\/","title":{"rendered":"A second generation of homogenized Canadian monthly surface air temperature for climate trend analysis"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Cette \u00e9tude pr\u00e9sente une deuxi\u00e8me g\u00e9n\u00e9ration d&rsquo;ensemble de donn\u00e9es mensuelles homog\u00e9n\u00e9is\u00e9es sur la temp\u00e9rature moyenne de l&rsquo;air de surface pour l&rsquo;analyse des tendances climatiques au Canada. Les moyennes mensuelles des temp\u00e9ratures quotidiennes maximales et minimales quotidiennes ont \u00e9t\u00e9 examin\u00e9es dans 338 localit\u00e9s canadiennes. Les donn\u00e9es des sites d&rsquo;observation colocalis\u00e9s \u00e9taient parfois combin\u00e9es pour cr\u00e9er des s\u00e9ries chronologiques plus longues \u00e0 utiliser dans l&rsquo;analyse des tendances. Les s\u00e9ries chronologiques d&rsquo;observations ont ensuite \u00e9t\u00e9 ajust\u00e9es pour tenir compte du changement \u00e0 l&rsquo;\u00e9chelle nationale du temps d&rsquo;observation en juillet 1961, affectant les temp\u00e9ratures minimales quotidiennes enregistr\u00e9es \u00e0 120 stations synoptiques; ceux-ci ont \u00e9t\u00e9 ajust\u00e9s en utilisant des temp\u00e9ratures horaires sur les m\u00eames sites. Ensuite, des tests d&rsquo;homog\u00e9n\u00e9it\u00e9 ont \u00e9t\u00e9 effectu\u00e9s pour d\u00e9tecter et ajuster les autres discontinuit\u00e9s. Deux techniques ont \u00e9t\u00e9 utilis\u00e9es pour d\u00e9tecter les changements non climatiques des temp\u00e9ratures moyennes mensuelles d\u00e9saisonnalis\u00e9es: un test bas\u00e9 sur une r\u00e9gression lin\u00e9aire multiple et un test t maximal p\u00e9nalis\u00e9. Ces discontinuit\u00e9s ont \u00e9t\u00e9 ajust\u00e9es \u00e0 l&rsquo;aide d&rsquo;un algorithme d&rsquo;appariement de quantiles r\u00e9cemment d\u00e9velopp\u00e9: les ajustements ont \u00e9t\u00e9 estim\u00e9s \u00e0 l&rsquo;aide d&rsquo;une s\u00e9rie de r\u00e9f\u00e9rence. \u00c0 partir de ce nouvel ensemble de donn\u00e9es homog\u00e9n\u00e9is\u00e9es sur les temp\u00e9ratures, les tendances annuelles et saisonni\u00e8res des temp\u00e9ratures ont \u00e9t\u00e9 estim\u00e9es pour le Canada de 1950 \u00e0 2010 et le sud du Canada de 1900 \u00e0 2010. Dans l&rsquo;ensemble, la temp\u00e9rature a augment\u00e9 dans la plupart des endroits. Pour 1950\u20132010, la temp\u00e9rature moyenne annuelle sur le pays montre une tendance positive de 1,5 \u00b0 C au cours des 61 derni\u00e8res ann\u00e9es. Ce r\u00e9chauffement est l\u00e9g\u00e8rement plus prononc\u00e9 \u00e0 la temp\u00e9rature minimale qu&rsquo;\u00e0 la temp\u00e9rature maximale; de fa\u00e7on saisonni\u00e8re, le plus grand r\u00e9chauffement se produit en hiver et au printemps. Les r\u00e9sultats sont similaires pour le sud du Canada, bien que le r\u00e9chauffement soit consid\u00e9rablement plus important pour la temp\u00e9rature minimale que pour la temp\u00e9rature maximale sur la p\u00e9riode 1900-2010.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">*Cette ressource est en anglais.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-background no-border-radius\" href=\"http:\/\/ccli.ubc.ca\/wp-content\/uploads\/2021\/05\/A-second-generation-of-homogenized-Canadian-monthly-surface-air-temperature-for-climate-trend-analysis.pdf\" style=\"background-color:#2e5b66\" target=\"_blank\" rel=\"noreferrer noopener\">Lisez l&rsquo;\u00e9tude<\/a><\/div>\n<\/div>\n","protected":false},"featured_media":2037,"template":"","resource_type":[28],"topic":[103],"area":[105],"class_list":["post-4058","resource","type-resource","status-publish","has-post-thumbnail","hentry","topic-science-climat","area-canada-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - 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