P\u0159ed \u0161edes\u00e1ti \u0161esti miliony let narazil do Zem\u011b mezihv\u011bzdn\u00fd objekt a vytvo\u0159il kr\u00e1ter Chicxulub v Mexiku. N\u00e1raz spustil \u0159adu katastrofick\u00fdch ud\u00e1lost\u00ed, v\u010detn\u011b tsunami, zem\u011bt\u0159esen\u00ed a lesn\u00edch po\u017e\u00e1r\u016f.<\/p>\n\n
Jedn\u00edm z nejv\u00fdznamn\u011bj\u0161\u00edch faktor\u016f p\u0159i vyhynut\u00ed dinosaur\u016f byly saze produkovan\u00e9 po\u017e\u00e1ry vznikl\u00fdmi dopadem. Saze jsou \u010dern\u00e9 uhl\u00edkov\u00e9 \u010d\u00e1stice, kter\u00e9 pohlcuj\u00ed slune\u010dn\u00ed sv\u011btlo a blokuj\u00ed jeho p\u0159\u00edstup k zemsk\u00e9mu povrchu.<\/p>\n\n
Saze z po\u017e\u00e1r\u016f m\u011bly zni\u010duj\u00edc\u00ed dopad na mo\u0159sk\u00e9 ekosyst\u00e9my. \u010c\u00e1stice saz\u00ed z\u016fstaly v atmosf\u00e9\u0159e t\u00e9m\u011b\u0159 dva roky, blokovaly v\u011bt\u0161inu slune\u010dn\u00edho sv\u011btla a zabra\u0148ovaly fotosynt\u00e9ze. To vedlo ke zhroucen\u00ed potravn\u00edho \u0159et\u011bzce a vyhynut\u00ed mnoha mo\u0159sk\u00fdch \u017eivo\u010dich\u016f.<\/p>\n\n
Saze z po\u017e\u00e1r\u016f m\u011bly tak\u00e9 dlouhodob\u00e9 \u00fa\u010dinky na zemskou atmosf\u00e9ru. \u010c\u00e1stice saz\u00ed oh\u0159\u00edvaly atmosf\u00e9ru, co\u017e zp\u016fsobilo jej\u00ed rozp\u00edn\u00e1n\u00ed a stoup\u00e1n\u00ed. To vedlo ke zm\u011bn\u00e1m v atmosf\u00e9rick\u00fdch cirkula\u010dn\u00edch vzorc\u00edch a ke sn\u00ed\u017een\u00ed sr\u00e1\u017eek.<\/p>\n\n
Krom\u011b saz\u00ed p\u0159isp\u011bly k vyhynut\u00ed dinosaur\u016f i dal\u0161\u00ed klimatick\u00e9 faktory. Mezi tyto faktory pat\u0159il prach, s\u00edrany a zm\u011bny sklen\u00edkov\u00fdch plyn\u016f. \u010c\u00e1stice prachu blokovaly slune\u010dn\u00ed sv\u011btlo a zp\u016fsobovaly ochlazen\u00ed, zat\u00edmco s\u00edrany odr\u00e1\u017eely slune\u010dn\u00ed sv\u011btlo a zp\u016fsobovaly oteplov\u00e1n\u00ed.<\/p>\n\n
Po\u017e\u00e1ry vyvolan\u00e9 dopadem hr\u00e1ly v\u00fdznamnou roli v d\u016fsledku ud\u00e1lost\u00ed vyhynut\u00ed. Po\u017e\u00e1ry uvolnily do atmosf\u00e9ry velk\u00e9 mno\u017estv\u00ed saz\u00ed, co\u017e p\u0159isp\u011blo k zablokov\u00e1n\u00ed slune\u010dn\u00edho sv\u011btla a ochlazen\u00ed Zem\u011b.<\/p>\n\n
\u010c\u00e1stice saz\u00ed m\u011bly tak\u00e9 v\u00fdznamn\u00fd vliv na glob\u00e1ln\u00ed teploty. Saze pohlcuj\u00ed teplo, co\u017e zp\u016fsobuje oteplov\u00e1n\u00ed atmosf\u00e9ry. Tento oteplovac\u00ed efekt byl obzvl\u00e1\u0161t\u011b v\u00fdrazn\u00fd nad pevninou, kde teploty klesly t\u00e9m\u011b\u0159 o 30 stup\u0148\u016f Celsia b\u011bhem pouh\u00fdch t\u0159\u00ed let.<\/p>\n\n
Saze z po\u017e\u00e1r\u016f ovlivnily tak\u00e9 sr\u00e1\u017ekov\u00e9 vzorce. \u010c\u00e1stice saz\u00ed blokovaly slune\u010dn\u00ed sv\u011btlo, co\u017e naru\u0161ilo atmosf\u00e9rick\u00e9 cirkula\u010dn\u00ed vzorce. To vedlo ke sn\u00ed\u017een\u00ed sr\u00e1\u017eek, kter\u00e9 mohlo m\u00edt zni\u010duj\u00edc\u00ed dopad na k\u0159\u00eddovou divo\u010dinu.<\/p>\n\n
Modelov\u00e1n\u00ed \u00fa\u010dink\u016f saz\u00ed na zemsk\u00e9 klima je slo\u017eit\u00fd \u00fakol. \u010c\u00e1stice saz\u00ed interaguj\u00ed s jin\u00fdmi atmosf\u00e9rick\u00fdmi \u010d\u00e1sticemi a jejich \u00fa\u010dinky se mohou li\u0161it v z\u00e1vislosti na velikosti a tvaru \u010d\u00e1stic.<\/p>\n\n
Abychom pln\u011b pochopili roli saz\u00ed p\u0159i ud\u00e1lostech vyhynut\u00ed, je zapot\u0159eb\u00ed dal\u0161\u00edho v\u00fdzkumu. V\u011bdci mus\u00ed vyvinout p\u0159esn\u011bj\u0161\u00ed modely, aby simulovali \u00fa\u010dinky saz\u00ed na zemsk\u00e9 klima. Mus\u00ed tak\u00e9 studovat \u00fa\u010dinky saz\u00ed na r\u016fzn\u00e9 ekosyst\u00e9my a druhy. Tento v\u00fdzkum n\u00e1m pom\u016f\u017ee l\u00e9pe pochopit rizika spojen\u00e1 s budouc\u00edmi ud\u00e1lostmi vyhynut\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"
Vliv saz\u00ed na vyhynut\u00ed dinosaur\u016f Dopad zab\u00edjej\u00edc\u00ed dinosaury P\u0159ed \u0161edes\u00e1ti \u0161esti miliony let narazil do Zem\u011b mezihv\u011bzdn\u00fd objekt a vytvo\u0159il kr\u00e1ter Chicxulub v Mexiku. N\u00e1raz spustil \u0159adu katastrofick\u00fdch ud\u00e1lost\u00ed, v\u010detn\u011b…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[212],"tags":[134,207,137,6464,400,34],"class_list":["post-3364","post","type-post","status-publish","format-standard","hentry","category-earth-science","tag-dinosaurs","tag-geology","tag-paleontology","tag-soot","tag-extinction","tag-climate-change"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/3364","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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=3364"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/3364\/revisions"}],"predecessor-version":[{"id":3365,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/3364\/revisions\/3365"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=3364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=3364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=3364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}