{"id":100223,"date":"2026-02-27T00:12:04","date_gmt":"2026-02-26T23:12:04","guid":{"rendered":"https:\/\/www.infokuryr.cz\/n\/?p=100223"},"modified":"2026-02-21T13:33:00","modified_gmt":"2026-02-21T12:33:00","slug":"saharska-poust-se-ve-vsech-svych-lokalitach-od-roku-1980-zmensila-priblizne-o-8-diky-co2-ktere-podnitilo-pozoruhodnou-globalni-zelenou-renesanci","status":"publish","type":"post","link":"https:\/\/www.infokuryr.cz\/n\/2026\/02\/27\/saharska-poust-se-ve-vsech-svych-lokalitach-od-roku-1980-zmensila-priblizne-o-8-diky-co2-ktere-podnitilo-pozoruhodnou-globalni-zelenou-renesanci\/","title":{"rendered":"Saharsk\u00e1 pou\u0161\u0165 se ve v\u0161ech sv\u00fdch lokalit\u00e1ch od roku 1980 zmen\u0161ila p\u0159ibli\u017en\u011b o 8 % d\u00edky CO2, kter\u00e9 podn\u00edtilo pozoruhodnou glob\u00e1ln\u00ed zelenou renesanci"},"content":{"rendered":"<div id=\"fb-root\"><\/div>\n<p><strong><span dir=\"auto\">Jak\u00fd ne\u010dekan\u00fd zvrat ud\u00e1lost\u00ed v historii klimatu!<\/span><\/strong><\/p>\n<p><span dir=\"auto\">Saharsk\u00e1 pou\u0161\u0165 se od 80. let 20. stolet\u00ed zmen\u0161ila p\u0159ibli\u017en\u011b o 8 % d\u00edky rostouc\u00edm hladin\u00e1m CO\u2082, co\u017e podn\u00edtilo pozoruhodnou glob\u00e1ln\u00ed zelenou renesanci.<\/span><\/p>\n<p><span dir=\"auto\">Data z p\u0159\u00edstroj\u016f AVHRR a MODIS NASA ukazuj\u00ed, \u017ee 25 % a\u017e 50 % vegetace Zem\u011b se v\u00fdrazn\u011b zazelenalo, co\u017e je plocha odpov\u00eddaj\u00edc\u00ed p\u0159ibli\u017en\u011b dvojn\u00e1sobku velikosti kontinent\u00e1ln\u00edch Spojen\u00fdch st\u00e1t\u016f.<\/span><\/p>\n<p><span dir=\"auto\">Hnojen\u00ed CO2\u2082 generovalo p\u0159ibli\u017en\u011b 70 % tohoto r\u016fstu, co\u017e rostlin\u00e1m umo\u017enilo efektivn\u011bji hospoda\u0159it s vodou zkr\u00e1cen\u00edm doby, po kterou z\u016fst\u00e1vaj\u00ed pr\u016fduchy (listov\u00e9 p\u00f3ry) otev\u0159en\u00e9, co\u017e n\u00e1sledn\u011b sni\u017euje ztr\u00e1ty vody a zvy\u0161uje odolnost proti suchu.<\/span><\/p>\n<p><span dir=\"auto\">D\u00edky tomu si vegetace znovu os\u00eddlila such\u00e9 oblasti hrani\u010d\u00edc\u00ed se Sahelem (ji\u017en\u00edm okrajem Sahary), na Bl\u00edzk\u00e9m v\u00fdchod\u011b a v australsk\u00e9m vnitrozem\u00ed. Jen Sahara ztratila p\u0159ibli\u017en\u011b 8 % sv\u00e9 pou\u0161tn\u00ed plochy, co\u017e odpov\u00edd\u00e1 v\u00edce ne\u017e 700 000 km\u00b2 dodate\u010dn\u00e9ho vegeta\u010dn\u00edho krytu, \u010d\u00edm\u017e se pust\u00e9 p\u00edsky zatla\u010dily zp\u011bt do oblast\u00ed, kter\u00e9 byly kdysi nehostinn\u00e9.<\/span><\/p>\n<p><span dir=\"auto\">Koncentrace atmosf\u00e9rick\u00e9ho CO\u2082 se v sou\u010dasnosti pohybuje kolem 430 ppm (\u00farovn\u011b se p\u0159edpokl\u00e1daj\u00ed na za\u010d\u00e1tek roku 2026), co\u017e umo\u017e\u0148uje rostlin\u00e1m prosp\u00edvat tam, kde se jim d\u0159\u00edve neda\u0159ilo. Zm\u011bna klimatu sice p\u0159edstavuje v\u00e1\u017en\u00e9 v\u00fdzvy, ale tato ekologizace ukazuje jasn\u00fd a m\u011b\u0159iteln\u00fd p\u0159\u00ednos vy\u0161\u0161\u00edch koncentrac\u00ed CO\u2082: zelen\u011bj\u0161\u00ed a odoln\u011bj\u0161\u00ed planetu v mnoha such\u00fdch oblastech.<\/span><\/p>\n<p><strong><span dir=\"auto\">Zde je faktick\u00e9 shrnut\u00ed zalo\u017een\u00e9 na hlavn\u00edch v\u011bdeck\u00fdch zdroj\u00edch:<\/span><\/strong><\/p>\n<ul>\n<li><span dir=\"auto\">Rozsah ozelen\u011bn\u00ed: Kl\u00ed\u010dov\u00e9 studie, jako nap\u0159\u00edklad ta publikovan\u00e1 v roce 2016 v \u010dasopise Nature Climate Change (Zhu a kol., s p\u0159isp\u011bn\u00edm v\u00fdzkumn\u00edk\u016f z NASA a Bostonsk\u00e9 univerzity), ukazuj\u00ed v\u00fdznamn\u00fd n\u00e1r\u016fst indexu listov\u00e9 plochy (LAI) na 25 % a\u017e 50 % vegeta\u010dn\u00ed plochy planety od 80. let 20. stolet\u00ed. To p\u0159edstavuje dal\u0161\u00ed zelenou plochu odpov\u00eddaj\u00edc\u00ed zhruba dvojn\u00e1sobku velikosti kontinent\u00e1ln\u00edch Spojen\u00fdch st\u00e1t\u016f, jak je uvedeno ve va\u0161em textu. Ned\u00e1vn\u00e9 aktualizace potvrzuj\u00ed, \u017ee tento trend pokra\u010duje, s ned\u00e1vn\u00fdmi vrcholy (nap\u0159\u00edklad rok 2020 byl v n\u011bkter\u00fdch ohledech obzvl\u00e1\u0161t\u011b zelen\u00fdm rokem).<\/span><\/li>\n<li><span dir=\"auto\">Dominantn\u00ed role CO\u2082: Faktori\u00e1ln\u00ed modelov\u00e1n\u00ed nazna\u010duje, \u017ee hnojen\u00ed CO\u2082 vysv\u011btluje p\u0159ibli\u017en\u011b 70 % tohoto celkov\u00e9ho trendu ozelen\u011bn\u00ed. CO\u2082 umo\u017e\u0148uje rostlin\u00e1m udr\u017eet pr\u016fduchy otev\u0159en\u00e9 po krat\u0161\u00ed dobu, aby zachytily pot\u0159ebn\u00fd uhl\u00edk, a t\u00edm sni\u017euj\u00ed ztr\u00e1ty vody transpirac\u00ed. D\u00edky tomu jsou rostliny efektivn\u011bj\u0161\u00ed ve vyu\u017e\u00edv\u00e1n\u00ed vody a odoln\u011bj\u0161\u00ed v\u016f\u010di suchu, co\u017e podporuje jejich expanzi v such\u00fdch a polopou\u0161tn\u00edch oblastech.<\/span><\/li>\n<li><span dir=\"auto\">Dot\u010den\u00e9 regiony: Sahel (ji\u017en\u00ed okraj Sahary) vykazuje v\u00fdrazn\u00e9 ozelen\u011bn\u00ed, kter\u00e9 souvis\u00ed jak s obnoven\u00edm sr\u00e1\u017eek po obdob\u00edch sucha v 70. a 80. letech 20. stolet\u00ed, tak s efektem CO\u2082. Z toho t\u011b\u017e\u00ed i oblasti na Bl\u00edzk\u00e9m v\u00fdchod\u011b, ve vnitrozem\u00ed Austr\u00e1lie a v dal\u0161\u00edch such\u00fdch z\u00f3n\u00e1ch. Pokud jde o samotnou Saharu, v online p\u0159\u00edsp\u011bvc\u00edch a diskus\u00edch se objevuj\u00ed tvrzen\u00ed o 8% zmen\u0161en\u00ed jej\u00ed pou\u0161tn\u00ed plochy (p\u0159ibli\u017en\u011b 700 000 km\u00b2 dodate\u010dn\u00e9 vegetace), kter\u00e1 v\u0161ak nejsou potvrzena v\u00fdznamn\u00fdmi ani ned\u00e1vn\u00fdmi studiemi NASA. Sahara z\u016fst\u00e1v\u00e1 podle anal\u00fdz do zna\u010dn\u00e9 m\u00edry stabiln\u00ed nebo se v n\u011bkter\u00fdch \u010d\u00e1stech m\u00edrn\u011b roz\u0161i\u0159uje (nap\u0159\u00edklad studie z roku 2020 uv\u00e1d\u00ed \u010dist\u00e9 roz\u0161\u00ed\u0159en\u00ed o ~8 % od roku 1950 do roku 2015 v d\u016fsledku jin\u00fdch klimatick\u00fdch faktor\u016f, ale ozelen\u011bn\u00ed je v\u00fdrazn\u011bj\u0161\u00ed v Sahelu ne\u017e v j\u00e1dru pou\u0161t\u011b). \u201eOzelen\u011bn\u00ed Sahelu\u201c je sice pozorov\u00e1no, ale nejde o masivn\u00ed zmen\u0161en\u00ed centr\u00e1ln\u00ed Sahary.<\/span><\/li>\n<li><span dir=\"auto\">Aktu\u00e1ln\u00ed hladiny CO\u2082: V \u00fanoru 2026 se p\u0159edpokl\u00e1d\u00e1, \u017ee koncentrace atmosf\u00e9rick\u00e9ho CO\u2082 (m\u011b\u0159en\u00e9 na Mauna Loa agenturou NOAA) budou pohybovat kolem 429\u2013430 ppm, co\u017e dob\u0159e odpov\u00edd\u00e1 va\u0161\u00ed zm\u00ednce o ~430 ppm. Jedn\u00e1 se o kontinu\u00e1ln\u00ed n\u00e1r\u016fst ve srovn\u00e1n\u00ed s ~340 ppm v 80. letech 20. stolet\u00ed.<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">od\u00a0<\/span><strong><span dir=\"auto\">Patrice Gibertie<\/span><\/strong><\/p>\n<p><em><span dir=\"auto\">Zdroj:\u00a0<\/span><a href=\"https:\/\/pgibertie.com\/2026\/02\/20\/le-desert-du-sahara-de-tous-les-endroits-a-retreci-denviron-8-depuis-1980-grace-au-co2-alimentant-une-remarquable-renaissance-verte-mondiale\/\" target=\"_blank\" rel=\"noreferrer noopener\" data-type=\"link\" data-id=\"https:\/\/pgibertie.com\/2026\/02\/20\/le-desert-du-sahara-de-tous-les-endroits-a-retreci-denviron-8-depuis-1980-grace-au-co2-alimentant-une-remarquable-renaissance-verte-mondiale\/\"><span dir=\"auto\">Patrice Gibertie<\/span><\/a><\/em><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jak\u00fd ne\u010dekan\u00fd zvrat ud\u00e1lost\u00ed v historii klimatu! Saharsk\u00e1 pou\u0161\u0165 se od 80. let 20. stolet\u00ed&#8230;<\/p>\n","protected":false},"author":2,"featured_media":100224,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[7],"tags":[2692,873,9952,9201],"_links":{"self":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts\/100223"}],"collection":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/comments?post=100223"}],"version-history":[{"count":0,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts\/100223\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/media\/100224"}],"wp:attachment":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/media?parent=100223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/categories?post=100223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/tags?post=100223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}