Ledovce, obrovsk\u00e9 masy ledu pokr\u00fdvaj\u00edc\u00ed rozs\u00e1hl\u00e9 oblasti, hraj\u00ed z\u00e1sadn\u00ed roli v utv\u00e1\u0159en\u00ed zemsk\u00e9ho klimatu. Jejich dynamika m\u016f\u017ee spustit dramatick\u00e9 zm\u011bny teploty a pov\u011btrnostn\u00edch vzorc\u016f.<\/p>\n\n
Jedn\u00edm takov\u00fdm p\u0159\u00edkladem jsou ud\u00e1losti Heinrich, obdob\u00ed rychl\u00e9 zm\u011bny klimatu charakterizovan\u00e9 vypou\u0161t\u011bn\u00edm ledovc\u016f do severn\u00edho Atlantiku. Tyto ud\u00e1losti, kter\u00e9 se vyskytovaly ka\u017ed\u00fdch 7 000 a\u017e 12 000 let, byly zp\u016fsobeny hromad\u011bn\u00edm a zhroucen\u00edm ledovcov\u00e9ho pokryvu pokr\u00fdvaj\u00edc\u00edho Severn\u00ed Ameriku.<\/p>\n\n
Jak se na ledovci hromadil sn\u00edh, jeho v\u00e1ha stla\u010dovala podlo\u017en\u00ed horniny a vytv\u00e1\u0159ela kluzkou pastu. Kdy\u017e tato pasta dos\u00e1hla kritick\u00e9 tlou\u0161\u0165ky, rychle st\u00e9kala Hudsonov\u00fdm pr\u016flivem a un\u00e1\u0161ela kameny a \u00falomky do oce\u00e1nu. Uvoln\u011bn\u00ed tohoto ledu a vody z taj\u00edc\u00edho ledu zm\u011bnilo mo\u0159sk\u00e9 proudy a v\u011btrn\u00e9 vzorce, co\u017e vedlo k v\u00fdznamn\u00fdm klimatick\u00fdm zm\u011bn\u00e1m.<\/p>\n\n
Ned\u00e1vn\u00fd v\u00fdzkum tak\u00e9 odhalil \u0159adu krat\u0161\u00edch chladn\u00fdch obdob\u00ed, zn\u00e1m\u00fdch jako \u201ez\u00e1blesky\u201c, kter\u00e9 se vyskytuj\u00ed mezi ud\u00e1lostmi Heinrich. Tyto z\u00e1blesky jsou zp\u016fsobeny hromad\u011bn\u00edm a vypou\u0161t\u011bn\u00edm ledu z ledovce v \u00fadol\u00ed \u0159eky svat\u00e9ho Vav\u0159ince.<\/p>\n\n
Stejn\u011b jako ud\u00e1losti Heinrich, i z\u00e1blesky zahrnuj\u00ed rychl\u00e9 hromad\u011bn\u00ed ledu n\u00e1sledovan\u00e9 n\u00e1hl\u00fdm vypu\u0161t\u011bn\u00edm. Nicm\u00e9n\u011b ledovec svat\u00e9ho Vav\u0159ince je men\u0161\u00ed a p\u0159ij\u00edm\u00e1 v\u00edce sn\u011b\u017een\u00ed, tak\u017ee z\u00e1blesky se vyskytuj\u00ed \u010dast\u011bji ne\u017e ud\u00e1losti Heinrich.<\/p>\n\n
Zpo\u010d\u00e1tku v\u011bdci v\u011b\u0159ili, \u017ee zm\u011bna klimatu byla poh\u00e1n\u011bna v\u00fdhradn\u011b dynamikou ledovc\u016f. Nov\u00e1 data v\u0161ak uk\u00e1zala, \u017ee vztah mezi ledovci a klimatem je slo\u017eit\u011bj\u0161\u00ed.<\/p>\n\n
Zat\u00edmco vypou\u0161t\u011bn\u00ed ledovc\u016f m\u016f\u017ee spustit zm\u011bnu klimatu, m\u016f\u017ee zm\u011bna klimatu tak\u00e9 ovlivnit dynamiku ledovc\u016f. Nap\u0159\u00edklad teplej\u0161\u00ed teploty mohou vytvo\u0159it plovouc\u00ed ledov\u00e9 \u0161elfy, kter\u00e9 br\u00e1n\u00ed ledovc\u016fm v uvol\u0148ov\u00e1n\u00ed.<\/p>\n\n
Vz\u00e1jemn\u00e9 p\u016fsoben\u00ed mezi ledovci a klimatem zd\u016fraz\u0148uje slo\u017eitost klimatick\u00e9ho syst\u00e9mu Zem\u011b. Nen\u00ed to pouze ot\u00e1zka ledu, kter\u00fd zp\u016fsobuje zm\u011bnu klimatu, nebo zm\u011bny klimatu, kter\u00e9 zp\u016fsobuj\u00ed led. M\u00edsto toho jde o jemn\u00fd tanec mezi ob\u011bma, kdy ka\u017ed\u00fd z nich ovliv\u0148uje druh\u00e9ho.<\/p>\n\n
V\u011bdci nad\u00e1le zkoumaj\u00ed slo\u017eit\u00fd vztah mezi ledovci a klimatem. Prozkoum\u00e1vaj\u00ed roli plovouc\u00edch ledov\u00fdch \u0161elf\u016f, dopad v\u00edce ledovc\u016f a vyu\u017eit\u00ed izotop\u016f kysl\u00edku k datov\u00e1n\u00ed ledov\u00fdch jader.<\/p>\n\n
Tento prob\u00edhaj\u00edc\u00ed v\u00fdzkum je nezbytn\u00fd pro pochopen\u00ed minulosti, sou\u010dasnosti a budoucnosti zemsk\u00e9ho klimatu. Rozpleten\u00edm slo\u017eitost\u00ed dynamiky ledovc\u016f mohou v\u011bdci l\u00e9pe p\u0159edv\u00eddat a zm\u00edr\u0148ovat dopady zm\u011bny klimatu.<\/p>","protected":false},"excerpt":{"rendered":"
Ledovce a tanec zm\u011bny klimatu Ledovce: Poh\u00e1n\u011b\u010di klimatu Ledovce, obrovsk\u00e9 masy ledu pokr\u00fdvaj\u00edc\u00ed rozs\u00e1hl\u00e9 oblasti, hraj\u00ed z\u00e1sadn\u00ed roli v utv\u00e1\u0159en\u00ed zemsk\u00e9ho klimatu. Jejich dynamika m\u016f\u017ee spustit dramatick\u00e9 zm\u011bny teploty a…<\/p>\n","protected":false},"author":6,"featured_media":23382,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[284],"tags":[722,4592,5267,2049,572,34],"class_list":["post-16778","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-climate-science","tag-glaciers","tag-ice-sheets","tag-paleoclimatology","tag-scientific-research","tag-earth-science","tag-climate-change"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/16778","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=16778"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/16778\/revisions"}],"predecessor-version":[{"id":16779,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/16778\/revisions\/16779"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media\/23382"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=16778"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=16778"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=16778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}