{"id":3817,"date":"2022-12-16T19:00:29","date_gmt":"2022-12-16T19:00:29","guid":{"rendered":"https:\/\/iccinet.org\/?p=3817"},"modified":"2022-12-16T19:01:38","modified_gmt":"2022-12-16T19:01:38","slug":"iverse-plants-and-animals-covered-greenland-2-million-years-ago-at-temperatures-that-may-be-reached-with-continued-high-emissions","status":"publish","type":"post","link":"https:\/\/iccinet.org\/sv\/iverse-plants-and-animals-covered-greenland-2-million-years-ago-at-temperatures-that-may-be-reached-with-continued-high-emissions\/","title":{"rendered":"Diverse v\u00e4xter och djur t\u00e4ckte Gr\u00f6nland f\u00f6r 2 miljoner \u00e5r sedan vid temperaturer som kan n\u00e5s med fortsatt h\u00f6ga utsl\u00e4pp"},"content":{"rendered":"<p><em>Natur<\/em>, 7 december 2022<\/p>\n<p>Forntida DNA fruset i permafrost fr\u00e5n norra Gr\u00f6nland visar att regionen var t\u00e4ckt av ett blomstrande skogsekosystem f\u00f6r cirka 2 miljoner \u00e5r sedan, en period d\u00e5 de lokala lufttemperaturerna bara var n\u00e5gra grader varmare \u00e4n dagens f\u00f6rh\u00e5llanden. Innan dessa fynd gjordes var det n\u00e4stan om\u00f6jligt att rekonstruera s\u00e5dana ekosystem, eftersom det \u00e4r s\u00e4llsynt att hitta fossil som \u00e4r mer \u00e4n en miljon \u00e5r gamla. Den h\u00e4r studien bygger p\u00e5 en ny teknik f\u00f6r att rekonstruera DNA-fragment fr\u00e5n frusna permafrostsediment, vilket g\u00f6r det m\u00f6jligt f\u00f6r forskarna att uppt\u00e4cka livsprover som \u00e4r miljontals \u00e5r \u00e4ldre \u00e4n vad som tidigare varit m\u00f6jligt. Studien \u00f6ppnar d\u00e4rf\u00f6r ett f\u00f6nster in till Gr\u00f6nland under sen pliocen och tidig pleistocen (3,5-1 miljoner \u00e5r sedan). I st\u00e4llet f\u00f6r det enorma ist\u00e4cke vi ser idag fanns det p\u00e5 Gr\u00f6nland en boreal skog fylld med tr\u00e4d, buskar och mindre v\u00e4xter. Den var hem \u00e5t m\u00e5nga djur, bland annat mastodonter, renar, harar och g\u00e4ss. Framf\u00f6r allt visar dessa frusna jordar ett unikt ekosystem med arter fr\u00e5n Arktis och varmare klimat som blandats ihop, utan n\u00e5gon modern motsvarighet. Lufttemperaturerna i sen pliocen var cirka 11 \u00b0C varmare \u00e4n i dag, vilket liknar de temperaturer p\u00e5 Gr\u00f6nland som f\u00f6rutsp\u00e5s i scenarier med h\u00f6g uppv\u00e4rmning om inte utsl\u00e4ppen minskas. Dessa sediment understryker vikten av att minska utsl\u00e4ppen f\u00f6r att hejda stigande temperaturer, bromsa Gr\u00f6nlands isf\u00f6rlust och bevara det moderna ekosystemets stabilitet.<\/p>\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41586-022-05453-y\">https:\/\/www.nature.com\/articles\/s41586-022-05453-y<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Nature, 7 December 2022 Ancient DNA frozen in permafrost from northern Greenland reveals that this region was covered in a thriving forest ecosystem around 2 million years ago, a period during which local air temperatures were only several degrees warmer than current conditions. Prior to these findings, it was nearly impossible to reconstruct such ecosystems, [&#8230;]\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[152],"tags":[],"class_list":["post-3817","post","type-post","status-publish","format-standard","hentry","category-cryosphere-capsules"],"modified_by":"Pam Pearson","_links":{"self":[{"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/posts\/3817","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/comments?post=3817"}],"version-history":[{"count":2,"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/posts\/3817\/revisions"}],"predecessor-version":[{"id":3821,"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/posts\/3817\/revisions\/3821"}],"wp:attachment":[{"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/media?parent=3817"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/categories?post=3817"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/iccinet.org\/sv\/wp-json\/wp\/v2\/tags?post=3817"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}