{"id":15540,"date":"2017-08-03T20:00:26","date_gmt":"2017-08-03T18:00:26","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=15540"},"modified":"2017-07-14T09:08:09","modified_gmt":"2017-07-14T07:08:09","slug":"la-terre-abrite-beaucoup-plus-de-forets-que-ce-quon-pensait","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/la-terre-abrite-beaucoup-plus-de-forets-que-ce-quon-pensait\/","title":{"rendered":"La Terre abrite beaucoup plus de for\u00eats que ce qu&rsquo;on pensait"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p>Une nouvelle analyse globale de la r\u00e9partition des for\u00eats sur le globe a permis de d\u00e9couvrir 467 millions d&rsquo;hectares de for\u00eats pr\u00e9c\u00e9demment non d\u00e9clar\u00e9es. Il s&rsquo;agit d&rsquo;une superficie \u00e9quivalant \u00e0 60% de la taille de l&rsquo;Australie.<\/p>\n<p>Cette d\u00e9couverte augmente d&rsquo;environ 9% la quantit\u00e9 connue de couverture foresti\u00e8re mondiale et augmentera consid\u00e9rablement les estimations de la quantit\u00e9 de carbone stock\u00e9e dans les plantes du monde entier, rapporte le site internet The Conversation.<\/p>\n<p>Ces nouvelles for\u00eats ont \u00e9t\u00e9 trouv\u00e9es en examinant les \u00ab\u00a0zones arides\u00a0\u00bb, appel\u00e9es ainsi parce qu&rsquo;elles connaissent beaucoup moins de pr\u00e9cipitations qu&rsquo;elles ne perdent d&rsquo;eau par l&rsquo;\u00e9vaporation et la transpiration des plantes. Selon les r\u00e9sultats de l&rsquo;\u00e9tude publi\u00e9e dans la revue Science, ces zones arides contiennent 45% de for\u00eat de plus que ce qui avait \u00e9t\u00e9 rapport\u00e9 dans les \u00e9tudes pr\u00e9c\u00e9dentes.<\/p>\n<p>De nouvelles for\u00eats ont \u00e9t\u00e9 d\u00e9couvertes dans des zones arides sur tous les continents habit\u00e9s, mais principalement en Afrique subsaharienne, autour de la M\u00e9diterran\u00e9e, du centre de l&rsquo;Inde, de l&rsquo;Australie c\u00f4ti\u00e8re, de l&rsquo;ouest de l&rsquo;Am\u00e9rique du Sud, du nord-est du Br\u00e9sil, du nord de la Colombie et du Venezuela, et des parties nordiques des for\u00eats bor\u00e9ales au Canada et Russie. En Afrique, l&rsquo;\u00e9tude a permis de doubler la quantit\u00e9 de for\u00eat s\u00e8che connue.<\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p>Cela peut sembler incroyable que ces for\u00eats n&rsquo;aient pas \u00e9t\u00e9 d\u00e9couvertes plus t\u00f4t. Mais ce type de for\u00eat \u00e9tait auparavant difficile \u00e0 mesurer en raison de la densit\u00e9 relativement faible des arbres.<\/p>\n<p>De plus, les enqu\u00eates pr\u00e9c\u00e9dentes \u00e9taient bas\u00e9es sur des images satellites anciennes et \u00e0 faible r\u00e9solution. La nouvelle analyse a utilis\u00e9 des images satellites de haute r\u00e9solution disponibles via Google Earth Engine et a utilis\u00e9 une interpr\u00e9tation visuelle simple du nombre d&rsquo;arbres et de la densit\u00e9. Un \u00e9chantillon de ces sites a \u00e9galement \u00e9t\u00e9 compar\u00e9 aux informations sur le terrain pour en \u00e9valuer la pr\u00e9cision.<\/p>\n<p>&nbsp;<\/p>\n<p>Cette d\u00e9couverte va consid\u00e9rablement am\u00e9liorer la pr\u00e9cision des mod\u00e8les utilis\u00e9s pour calculer la quantit\u00e9 de carbone stock\u00e9e dans les paysages terrestres. Cela aidera \u00e9galement \u00e0 calculer les \u00e9missions de carbone de chaque pays.<\/p>\n<p>Extrait et source de&nbsp;<a href=\"http:\/\/www.levif.be\/actualite\/environnement\/la-terre-abrite-beaucoup-plus-de-forets-que-ce-qu-on-pensait\/article-normal-660615.html\" target=\"_blank\" rel=\"noopener\">http:\/\/www.levif.be\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"15540\">(480)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Une nouvelle analyse globale de la r\u00e9partition des for\u00eats sur le globe a permis de d\u00e9couvrir 467 millions d&rsquo;hectares de&#8230;<\/p>\n","protected":false},"author":1,"featured_media":12134,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"La Terre abrite beaucoup plus de for\u00eats que ce qu'on pensait @laterredufutur","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[31],"tags":[288,6376,538,6476,314,236,736],"class_list":["post-15540","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","tag-arbre","tag-augmente","tag-decouverte","tag-enquete","tag-foret","tag-modeles","tag-nombre","wpcat-31-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/arbres-4.jpg?fit=900%2C506&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-42E","jetpack-related-posts":[{"id":9524,"url":"https:\/\/www.laterredufutur.com\/accueil\/respiration-terrestre\/","url_meta":{"origin":15540,"position":0},"title":"Respiration Terrestre","author":"Admin","date":"23 novembre 2015","format":false,"excerpt":"Tel un humain absorbant de l\u2019oxyg\u00e8ne et expirant du CO2, la vie v\u00e9g\u00e9tale sur\u00a0Terre n\u2019est pas statique, mais croit\u00a0et d\u00e9croit\u00a0avec les saisons. Une nouvelle animation de la NASA, l\u2019agence spatiale am\u00e9ricaine, montre une ann\u00e9e dans la vie des plantes sur la terre et dans les oc\u00e9ans et de respiration de\u2026","rel":"","context":"Dans &quot;Ecologie&quot;","block_context":{"text":"Ecologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/ecologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/globe-terrestre-co2.jpg?fit=559%2C375&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/globe-terrestre-co2.jpg?fit=559%2C375&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/globe-terrestre-co2.jpg?fit=559%2C375&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":25359,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-plus-grande-foret-sauvage-du-monde-semble-se-reduire-comme-une-peau-de-chagrin\/","url_meta":{"origin":15540,"position":1},"title":"La plus grande for\u00eat sauvage du monde semble se r\u00e9duire comme une peau de chagrin","author":"Admin","date":"14 novembre 2023","format":false,"excerpt":"Les for\u00eats bor\u00e9ales de la Terre entourent les extr\u00e9mit\u00e9s septentrionales de notre plan\u00e8te, juste au sud de la toundra sans arbres de l'Arctique. Si la plan\u00e8te porte une calotte glaciaire arctique, les for\u00eats bor\u00e9ales sont un bandeau l\u00e2che enroul\u00e9 autour de ses oreilles, couvrant de larges portions de l'Alaska, du\u2026","rel":"","context":"Dans &quot;Ecologie&quot;","block_context":{"text":"Ecologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/ecologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/09\/foret-egypte-desert.jpg?fit=768%2C512&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/09\/foret-egypte-desert.jpg?fit=768%2C512&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/09\/foret-egypte-desert.jpg?fit=768%2C512&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/09\/foret-egypte-desert.jpg?fit=768%2C512&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":25400,"url":"https:\/\/www.laterredufutur.com\/accueil\/quand-leurope-etait-couverte-de-savanes-et-delephants\/","url_meta":{"origin":15540,"position":2},"title":"Quand l&rsquo;Europe \u00e9tait couverte de savanes et d&rsquo;El\u00e9phants","author":"Admin","date":"4 d\u00e9cembre 2023","format":false,"excerpt":"Cette nouvelle \u00e9tude remet en question l'id\u00e9e que les for\u00eats denses pr\u00e9dominaient en Europe avant l'arriv\u00e9e de l'Homme moderne. Bien qu\u2019on ne puisse sans doute jamais savoir \u00e0 quoi ressemblait le monde avant l\u2019arriv\u00e9e des humains, nous avons une petite id\u00e9e de ce que cela aurait pu \u00eatre. Cependant, il\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/11\/europe-elephants-savane.jpg?fit=1200%2C900&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/11\/europe-elephants-savane.jpg?fit=1200%2C900&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/11\/europe-elephants-savane.jpg?fit=1200%2C900&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/11\/europe-elephants-savane.jpg?fit=1200%2C900&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/11\/europe-elephants-savane.jpg?fit=1200%2C900&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":23304,"url":"https:\/\/www.laterredufutur.com\/accueil\/il-y-a-75-millions-dannees-lantarctique-etait-recouverte-dimmenses-forets\/","url_meta":{"origin":15540,"position":3},"title":"Il y a 75 millions d&rsquo;ann\u00e9es, l&rsquo;Antarctique \u00e9tait recouverte d&rsquo;immenses for\u00eats","author":"Admin","date":"1 novembre 2021","format":false,"excerpt":"Les paysages gel\u00e9s de l'Antarctique sont le summum de la glace. Mais il y a des millions d'ann\u00e9es, le feu ravageait r\u00e9guli\u00e8rement le continent. C'est la conclusion d'une nouvelle recherche qui a trouv\u00e9 des preuves de feux r\u00e9guliers il y a environ 75 millions d'ann\u00e9es. Preuves de l'existence de for\u00eats\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/antarctique-et-forets.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/antarctique-et-forets.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/antarctique-et-forets.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/antarctique-et-forets.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/antarctique-et-forets.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":17594,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-experience-de-rechauffement-climatique-donne-des-resultats-inattendus\/","url_meta":{"origin":15540,"position":4},"title":"Une exp\u00e9rience de r\u00e9chauffement climatique donne des r\u00e9sultats inattendus","author":"Admin","date":"7 janvier 2019","format":false,"excerpt":"Les for\u00eats tropicales stockent environ un tiers du carbone de la Terre et environ deux tiers de sa biomasse a\u00e9rienne.\u00a0La plupart des mod\u00e8les de changement climatique pr\u00e9voient que, \u00e0 mesure que le monde se r\u00e9chauffera, toute cette biomasse se d\u00e9composera plus rapidement, ce qui enverrait beaucoup plus de dioxyde de\u2026","rel":"","context":"Dans &quot;Climat&quot;","block_context":{"text":"Climat","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/climat\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/echantillons-feuilles-sechees.jpg?fit=800%2C480&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/echantillons-feuilles-sechees.jpg?fit=800%2C480&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/echantillons-feuilles-sechees.jpg?fit=800%2C480&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/echantillons-feuilles-sechees.jpg?fit=800%2C480&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":25350,"url":"https:\/\/www.laterredufutur.com\/accueil\/lhemisphere-sud-sasseche-lentement-selon-des-scientifiques\/","url_meta":{"origin":15540,"position":5},"title":"L&rsquo;h\u00e9misph\u00e8re sud s&rsquo;ass\u00e8che lentement, selon des scientifiques","author":"Admin","date":"8 novembre 2023","format":false,"excerpt":"Il est bien connu que l'eau est la cl\u00e9 de la vie sur Terre. Mais on sait moins que seul 1 % environ de toute l'eau de la plan\u00e8te est de l'eau douce disponible pour les humains, les plantes ou les animaux terrestres. Le reste se trouve dans les oc\u00e9ans\u2026","rel":"","context":"Dans &quot;Climat&quot;","block_context":{"text":"Climat","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/climat\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/11\/afrique-vue-de-lespace.jpg?fit=1024%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/11\/afrique-vue-de-lespace.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/11\/afrique-vue-de-lespace.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/11\/afrique-vue-de-lespace.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15540","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=15540"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15540\/revisions"}],"predecessor-version":[{"id":15541,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15540\/revisions\/15541"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/12134"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=15540"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=15540"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=15540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}