{"id":67331,"date":"2006-03-06T00:00:00","date_gmt":"2006-03-06T00:00:00","guid":{"rendered":"https:\/\/new.dedefensa.org\/index.php\/2006\/03\/06\/lombre-du-grand-dust-bowl-du-temps-de-la-grande-depression\/"},"modified":"2006-03-06T00:00:00","modified_gmt":"2006-03-06T00:00:00","slug":"lombre-du-grand-dust-bowl-du-temps-de-la-grande-depression","status":"publish","type":"post","link":"https:\/\/new.dedefensa.org\/index.php\/2006\/03\/06\/lombre-du-grand-dust-bowl-du-temps-de-la-grande-depression\/","title":{"rendered":"L’ombre du grand \u201cDust Bowl<\/em>\u201d du temps de la Grande D\u00e9pression"},"content":{"rendered":"

Parmi les sites travaillant sur la m\u00e9t\u00e9orologie aux USA, accuweather.com<\/a> est l’un des plus actifs avec 250.000 abonn\u00e9s et des services pour 10.000 sites professionnels, dont CNN, ABC, le Washington Post<\/em> et le New York Times<\/em>. Une r\u00e9cente projection sur un mod\u00e8le d’une grande tendance climatique aux USA pr\u00e9sente une \u00e9trange occurrence avec une r\u00e9sonance politique indirecte propre \u00e0 agir sur les psychologies dans ces temps de crise.<\/p>\n<\/p>\n

\tC’est notamment le quotidien Morris Daily Herald<\/a> (Pennsylvanie) qui a d\u00e9velopp\u00e9 cette nouvelle et auquel nous nous r\u00e9f\u00e9rons. L’hypoth\u00e8se climatique est que les USA se trouverait \u00e0 la veille d’un nouveau Dust Bowl<\/em>.<\/p>\n<\/p>\n

\tLe Dust Bowl<\/em> est cet extraordinaire ph\u00e9nom\u00e8ne climatique de s\u00e9cheresse et de st\u00e9rilisation des terres par temp\u00eates de sable qui frappa dans les ann\u00e9es 1933-1939 le centre des Etats-Unis. Le ph\u00e9nom\u00e8ne accrut dans une proportion notable la d\u00e9tresse sociale de l’Am\u00e9rique frapp\u00e9e par la Grande D\u00e9pression (1930-33 pour le plus fort, mais jusqu’en 1939). Les h\u00e9ros path\u00e9tiques des Raisins de la col\u00e8re<\/em>, de Steinbeck (\u00e0 l’\u00e9cran par John Ford), sont autant des victimes de la D\u00e9pression que du Dust Bowl<\/em>. Bien entendu, cette pr\u00e9vision climatique, au moment o\u00f9 l’Am\u00e9rique se trouve dans une p\u00e9riode d’instabilit\u00e9 consid\u00e9rable o\u00f9 certains pr\u00e9disent la possibilit\u00e9 d’une nouvelle Grande D\u00e9pression pourrait prendre l’aspect d’un sinistre pr\u00e9sage.<\/p>\n<\/p>\n

\tSelon le Morris Daily Herald<\/em> : \u00ab The exceptionally warm Atlantic waters that played a major role in the record-breaking 2005 hurricane season, coupled with cooler-than-normal Pacific waters, are weakening and changing the course of a low-level jet stream that normally channels moisture into the Great Plains. Effects are starting to be felt in America’s breadbasket, as the southern Great Plains region is already suffering from higher temperatures and a prolonged lack of precipitation.<\/em> <\/p>\n<\/p>\n

\t\u00bb Why could a new Dust Bowl drought occur?<\/em><\/p>\n<\/p>\n

\t\u00bb The low-level jet stream a fast-moving current of winds close to the Earth’s surface travels from east to west across the Atlantic, then typically curves northward as it crosses the Gulf of Mexico, bringing moisture to the Great Plains. Abnormal sea-surface temperatures have caused this low-level jet stream to continue westward and to weaken, which is preventing much-needed moisture from reaching the agriculturally critical region.<\/em><\/p>\n<\/p>\n

\t\u00bb The shift in the jet stream is also allowing a southerly flow from Mexico to bring much drier air northward into the Plains. Besides dramatically reducing precipitation for the region, the changes brought about by the abnormal sea-surface temperatures will also result in higher surface temperatures in the Plains.<\/em> <\/p>\n<\/p>\n

\t\u00bb When surfaces are wet, energy from solar radiation both evaporates moisture and heats the ground, said AccuWeather.com Chief Meteorologist Elliot Abrams. When no moisture is present, all that energy is channeled toward heating the ground, and the warmer ground heats the lower atmosphere. The combination of low moisture and higher temperatures would be a crippling one-two punch for the Great Plains should these conditions persist, much like what occurred during the Dust Bowl drought.<\/em> \u00bb<\/p>\n<\/p>\n

<\/p>\n

\tMis en ligne le 6 mars 2006 \u00e0 14H19<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

Parmi les sites travaillant sur la m\u00e9t\u00e9orologie aux USA, accuweather.com est l’un des plus actifs avec 250.000 abonn\u00e9s et des services pour 10.000 sites professionnels, dont CNN, ABC, le Washington Post et le New York Times. Une r\u00e9cente projection sur un mod\u00e8le d’une grande tendance climatique aux USA pr\u00e9sente une \u00e9trange occurrence avec une r\u00e9sonance… <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2],"tags":[5159,3083,5158,2891],"class_list":["post-67331","post","type-post","status-publish","format-standard","hentry","category-bloc-notes","tag-bowl","tag-depression","tag-dust","tag-grande"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/new.dedefensa.org\/index.php\/wp-json\/wp\/v2\/posts\/67331","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/new.dedefensa.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/new.dedefensa.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/new.dedefensa.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/new.dedefensa.org\/index.php\/wp-json\/wp\/v2\/comments?post=67331"}],"version-history":[{"count":0,"href":"https:\/\/new.dedefensa.org\/index.php\/wp-json\/wp\/v2\/posts\/67331\/revisions"}],"wp:attachment":[{"href":"https:\/\/new.dedefensa.org\/index.php\/wp-json\/wp\/v2\/media?parent=67331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/new.dedefensa.org\/index.php\/wp-json\/wp\/v2\/categories?post=67331"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/new.dedefensa.org\/index.php\/wp-json\/wp\/v2\/tags?post=67331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}