{"id":7983,"date":"2020-03-17T15:20:00","date_gmt":"2020-03-17T13:20:00","guid":{"rendered":"http:\/\/life.karpat.in.ua\/?p=7983"},"modified":"2020-03-17T12:36:32","modified_gmt":"2020-03-17T10:36:32","slug":"hatszorosara-gyorsult-a-jegolvadas-gronlandon-es-az-antarktiszon","status":"publish","type":"post","link":"https:\/\/life.karpat.in.ua\/?p=7983&lang=hu","title":{"rendered":"Hatszoros\u00e1ra gyorsult a j\u00e9golvad\u00e1s Gr\u00f6nlandon \u00e9s az Antarktiszon"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"370\" src=\"http:\/\/life.karpat.in.ua\/wp-content\/uploads\/2020\/03\/image-10.jpg\" alt=\"\" class=\"wp-image-7984\" srcset=\"https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2020\/03\/image-10.jpg 800w, https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2020\/03\/image-10-300x139.jpg 300w, https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2020\/03\/image-10-768x355.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Hatszoros\u00e1ra gyorsult a j\u00e9golvad\u00e1s Gr\u00f6nlandon \u00e9s az Antarktiszon az 1990-es \u00e9vekhez k\u00e9pest a glob\u00e1lis felmeleged\u00e9s hat\u00e1s\u00e1ra.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A F\u00f6ld k\u00e9t nagy kiterjed\u00e9s\u0171 j\u00e9gmez\u0151je 6,4 billi\u00f3 tonna jeget vesz\u00edtett el 1992 \u00e9s 2017 \u00f3ta a tud\u00f3sok szerint, akik a k\u00e9t sarkvid\u00e9k m\u0171holdadatair\u00f3l v\u00e9geztek \u00e1tfog\u00f3 elemz\u00e9st.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A vizsg\u00e1lt peri\u00f3dus j\u00e9golvad\u00e1sa glob\u00e1lisan 17,8 millim\u00e9terrel emelte a tengervizek szintj\u00e9t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Ma a j\u00e9gtakar\u00f3k sz\u00e1ml\u00e1j\u00e1ra \u00edrhat\u00f3 a tengerszint-emelked\u00e9s nagyj\u00e1b\u00f3l harmada, m\u00edg az 1990-es \u00e9vekben az ar\u00e1ny val\u00f3j\u00e1ban eleny\u00e9sz\u0151, k\u00f6r\u00fclbel\u00fcl \u00f6tsz\u00e1zal\u00e9kos volt&#8221; \u2013 magyar\u00e1zta Andrew Shepherd, a Leedsi Egyetem professzora a BBC h\u00edrport\u00e1lj\u00e1nak. A tud\u00f3s a j\u00e9gmez\u0151k t\u00f6meg\u00e9r\u0151l foly\u00f3 \u00f6sszehasonl\u00edt\u00f3 kutat\u00e1si projekt (Ice Sheet Mass Balance Intercomparison Exercise, Imbie) egyik vezet\u0151je.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A kutat\u00e1sban r\u00e9sztvev\u0151 szak\u00e9rt\u0151k majdnem h\u00e1rom \u00e9vtized sarkvid\u00e9kekr\u0151l k\u00e9sz\u00edtett m\u0171holdas megfigyel\u00e9si adatait tekintett\u00e9k \u00e1t. Ezek a m\u0171holdak nyomon k\u00f6vett\u00e9k a j\u00e9gmez\u0151k t\u00f6meg\u00e9nek, mozg\u00e1s\u00e1nak \u00e9s gravit\u00e1ci\u00f3j\u00e1nak v\u00e1ltoz\u00e1sait. Az Imbie antarktiszi \u00e9rt\u00e9kel\u00e9s\u00e9t&nbsp;<a href=\"https:\/\/www.nature.com\/articles\/s41586-018-0179-y\" target=\"_blank\" rel=\"noreferrer noopener\">a Nature-ben m\u00e9g 2018-ban<\/a>, a&nbsp;<a href=\"https:\/\/www.ipcc.ch\/site\/assets\/uploads\/sites\/3\/2019\/11\/03_SROCC_SPM_FINAL.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">gr\u00f6nlandit<\/a>&nbsp;pedig a foly\u00f3irat friss sz\u00e1m\u00e1ban k\u00f6z\u00f6lte.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A tud\u00f3sok az eredm\u00e9nyekhez azt is hozz\u00e1f\u0171zt\u00e9k, hogy a j\u00e9golvad\u00e1s az ENSZ \u00c9ghajlatv\u00e1ltoz\u00e1si Korm\u00e1nyk\u00f6zi Test\u00fclet\u00e9nek (IPCC) sz\u00e1m\u00edt\u00f3g\u00e9pes modellez\u00e9sei alapj\u00e1n k\u00e9sz\u00fclt 2014-es \u00e9rt\u00e9kel\u00e9se 53 centim\u00e9teres glob\u00e1lis v\u00edzszintemelked\u00e9st v\u00e1r 2100-ra. Az Imbie szak\u00e9rt\u0151inek tanulm\u00e1nya azonban azt mutatta, hogy az antarktiszi \u00e9s gr\u00f6nlandi j\u00e9golvad\u00e1s sokkal pesszimist\u00e1bb forgat\u00f3k\u00f6nyvet sugall, val\u00f3sz\u00edn\u0171leg tov\u00e1bbi 17 centim\u00e9terrel n\u00f6veli a sz\u00e1zad v\u00e9g\u00e9re sz\u00f3l\u00f3 becsl\u00e9st. &#8220;Ha ez val\u00f3ra v\u00e1lik, 2100-ra 400 milli\u00f3 embernek kell az \u00e9venk\u00e9nti parti \u00e1rad\u00e1sokkal szemben\u00e9znie&#8221; \u2013 mutatott r\u00e1 Sheperd.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>[Mer\u00e9sz \u00faj \u00f6tlet:&nbsp;<a href=\"https:\/\/hvg.hu\/tudomany\/20200304_emelkedo_tengerszint_europa_tengeri_gatrendszer\" target=\"_blank\" rel=\"noreferrer noopener\">637 km hossz\u00fa, monument\u00e1lis ker\u00edt\u00e9sg\u00e1tat h\u00fazn\u00e1nak fel az \u00c9szaki-tengeren<\/a>]<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gr\u00f6nland \u00e9s az Antarktisz kiss\u00e9 elt\u00e9r\u0151en reag\u00e1l az \u00e9ghajlatv\u00e1ltoz\u00e1sra. A d\u00e9li-sarkvid\u00e9ki j\u00e9golvad\u00e1s legink\u00e1bb az \u00f3ce\u00e1ni v\u00edzh\u0151m\u00e9rs\u00e9klet emelked\u00e9s\u00e9nek sz\u00e1ml\u00e1j\u00e1ra \u00edrhat\u00f3, mely a j\u00e9gmez\u0151k sz\u00e9l\u00e9t t\u00e1madja. Az \u00e9szaki-sarkvid\u00e9ki jeget is \u00e9ri ez a hat\u00e1s, azonban itt a meleged\u0151 leveg\u0151t is hozz\u00e1 kell adni.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A k\u00e9t sarkvid\u00e9k \u00f6sszesen 17,8 millim\u00e9teres tengerszintemel\u00e9s\u00e9b\u0151l 10,6 millim\u00e9ter (60 sz\u00e1zal\u00e9k) a gr\u00f6nlandi, 7,2 millim\u00e9ter (40 sz\u00e1zal\u00e9k) az antarktiszi olvad\u00e1snak tulajdon\u00edthat\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Az 1990-es \u00e9vekben mintegy 81 milli\u00e1rd tonna olvadt el \u00e9venk\u00e9nt a k\u00e9t sarkvid\u00e9ken, a 2010-es \u00e9vekre ez \u00e9vi 475 milli\u00e1rd tonn\u00e1ra emelkedett.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Forr\u00e1s: hvg<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hatszoros\u00e1ra gyorsult a j\u00e9golvad\u00e1s Gr\u00f6nlandon \u00e9s az Antarktiszon az 1990-es \u00e9vekhez k\u00e9pest a glob\u00e1lis felmeleged\u00e9s hat\u00e1s\u00e1ra.<\/p>\n","protected":false},"author":4,"featured_media":7984,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49,598,39],"tags":[1746],"class_list":["post-7983","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hirek","category-tudomany","category-vilag","tag-globalis-felmelegedes"],"_links":{"self":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts\/7983","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7983"}],"version-history":[{"count":0,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts\/7983\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/media\/7984"}],"wp:attachment":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7983"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7983"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7983"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}