{"id":26279,"date":"2025-11-28T21:22:21","date_gmt":"2025-11-29T02:22:21","guid":{"rendered":"https:\/\/www.realclimate.org\/?p=26279"},"modified":"2025-11-28T21:38:01","modified_gmt":"2025-11-29T02:38:01","slug":"retroaction-de-la-vapeur-deau","status":"publish","type":"post","link":"https:\/\/www.realclimate.org\/index.php\/fr\/archives\/2025\/11\/retroaction-de-la-vapeur-deau\/","title":{"rendered":"R\u00e9troaction de la vapeur d&#8217;eau"},"content":{"rendered":"<div class=\"kcite-section\" kcite-section-id=\"26279\">\n\n<p>La vapeur d&#8217;eau est un gaz a effet de serre puissant, qui absorbe les rayonnements de longueurs d&#8217;ondes \u00e9lev\u00e9es. Si la concentration atmosph\u00e9rique en vapeur d&#8217;eau augmente a cause du r\u00e9chauffement climatique, celle-ci va augmenter en retour l&#8217;effet de serre encore plus. Il est bien connu que le taux d&#8217;\u00e9vaporation est li\u00e9 a la temp\u00e9rature, et qu&#8217;une hausse des temp\u00e9ratures accro\u00eet la pression de la vapeur (\u00e9quation de Clausius-Clapeyron). Ce processus est connu comme \u00e9tant la <em>r\u00e9troaction (positive) de la vapeur d&#8217;eau<\/em>. Une diff\u00e9rence importante entre la vapeur d&#8217;eau et les autres gaz a effet de serre comme le CO<sub>2<\/sub> est que la vapeur d&#8217;eau ne passe qu&#8217;un temps tr\u00e8s court dans l&#8217;atmosph\u00e8re avant d&#8217;\u00eatre pr\u00e9cipit\u00e9, alors que la temps de r\u00e9sidence du CO<sub>2<\/sub> dans l&#8217;atmosph\u00e8re peut d\u00e9passer une centaine d&#8217;ann\u00e9es.<\/p>\n<!-- kcite active, but no citations found -->\n<\/div> <!-- kcite-section 26279 -->","protected":false},"excerpt":{"rendered":"<p>La vapeur d&#8217;eau est un gaz a effet de serre puissant, qui absorbe les rayonnements de longueurs d&#8217;ondes \u00e9lev\u00e9es. Si la concentration atmosph\u00e9rique en vapeur d&#8217;eau augmente a cause du r\u00e9chauffement climatique, celle-ci va augmenter en retour l&#8217;effet de serre encore plus. Il est bien connu que le taux d&#8217;\u00e9vaporation est li\u00e9 a la temp\u00e9rature, [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[196],"tags":[],"class_list":{"0":"post-26279","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-uncategorized-fr","7":"entry"},"aioseo_notices":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.realclimate.org\/index.php\/wp-json\/wp\/v2\/posts\/26279","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.realclimate.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.realclimate.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.realclimate.org\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/www.realclimate.org\/index.php\/wp-json\/wp\/v2\/comments?post=26279"}],"version-history":[{"count":1,"href":"https:\/\/www.realclimate.org\/index.php\/wp-json\/wp\/v2\/posts\/26279\/revisions"}],"predecessor-version":[{"id":26280,"href":"https:\/\/www.realclimate.org\/index.php\/wp-json\/wp\/v2\/posts\/26279\/revisions\/26280"}],"wp:attachment":[{"href":"https:\/\/www.realclimate.org\/index.php\/wp-json\/wp\/v2\/media?parent=26279"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.realclimate.org\/index.php\/wp-json\/wp\/v2\/categories?post=26279"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.realclimate.org\/index.php\/wp-json\/wp\/v2\/tags?post=26279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}