Kuzeybat\u0131 Gr\u00f6nland’daki Petermann Buzulu’nda bir ara\u015ft\u0131rma y\u00fcr\u00fct\u00fcrken, Kaliforniya \u00dcniversitesi Irvine Kamp\u00fcs\u00fc (UCI) ve NASA’n\u0131n Jet \u0130tki Laboratuvar\u0131’ndaki (JPL) ara\u015ft\u0131rmac\u0131lar, buz ve okyanusun daha \u00f6nce g\u00f6r\u00fclmemi\u015f bir \u015fekilde etkile\u015fime girdi\u011fini ortaya \u00e7\u0131kard\u0131lar. Buzulbilimciler, bulgular\u0131n\u0131n, iklim toplulu\u011funun kutup buzullar\u0131n\u0131n bozulmas\u0131ndan kaynaklanan gelecekteki deniz seviyesi art\u0131\u015f\u0131n\u0131n b\u00fcy\u00fckl\u00fc\u011f\u00fcn\u00fc b\u00fcy\u00fck \u00f6l\u00e7\u00fcde hafife ald\u0131\u011f\u0131 anlam\u0131na gelebilece\u011fini s\u00f6ylediler.
\nUCI\/NASA ekibi, \u00fc\u00e7 Avrupa g\u00f6revinden al\u0131nan uydu radar verilerini kullanarak, Petermann Buzulu’nun buzun kara yata\u011f\u0131ndan ayr\u0131ld\u0131\u011f\u0131 ve okyanusta y\u00fczmeye ba\u015flad\u0131\u011f\u0131 topraklama hatt\u0131n\u0131n gelgit d\u00f6ng\u00fcleri s\u0131ras\u0131nda \u00f6nemli \u00f6l\u00e7\u00fcde kayarak s\u0131cak deniz suyunun girip erimesine izin verdi\u011fini \u00f6\u011frendi. Grubun sonu\u00e7lar\u0131 Proceedings of the National Academy of Sciences dergisinde yay\u0131mland\u0131.<\/p>\n
H\u0131zland\u0131r\u0131lm\u0131\u015f buz Kuzeybat\u0131 Gr\u00f6nland’daki Petermann Buzulu’nda bir ara\u015ft\u0131rma y\u00fcr\u00fct\u00fcrken, Kaliforniya \u00dcniversitesi Irvine Kamp\u00fcs\u00fc (UCI) ve NASA’n\u0131n Jet \u0130tki Laboratuvar\u0131’ndaki (JPL) ara\u015ft\u0131rmac\u0131lar, buz ve okyanusun daha \u00f6nce g\u00f6r\u00fclmemi\u015f bir \u015fekilde etkile\u015fime girdi\u011fini ortaya \u00e7\u0131kard\u0131lar. Buzulbilimciler, bulgular\u0131n\u0131n, iklim toplulu\u011funun kutup buzullar\u0131n\u0131n bozulmas\u0131ndan kaynaklanan gelecekteki deniz seviyesi art\u0131\u015f\u0131n\u0131n b\u00fcy\u00fckl\u00fc\u011f\u00fcn\u00fc b\u00fcy\u00fck \u00f6l\u00e7\u00fcde hafife ald\u0131\u011f\u0131 anlam\u0131na gelebilece\u011fini s\u00f6ylediler. UCI\/NASA ekibi, \u00fc\u00e7 Avrupa […]<\/p>\n","protected":false},"author":512,"featured_media":58393,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,217],"tags":[7464,4403,8418,2025],"class_list":["post-58392","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bilim-gundemi","category-cevre-bilimleri","tag-buzullar","tag-gronland","tag-kuresel-iklim-krizi","tag-kuresel-isinma"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t
\n<\/strong>UCI D\u00fcnya sistem bilimi uzman\u0131 yard\u0131mc\u0131s\u0131 ve NASA doktora sonras\u0131 ara\u015ft\u0131rmac\u0131s\u0131 ba\u015f yazar Enrico Ciraci, “Petermann’\u0131n topraklama hatt\u0131 daha do\u011fru bir \u015fekilde bir topraklama b\u00f6lgesi olarak tan\u0131mlanabilir, \u00e7\u00fcnk\u00fc gelgitler girip \u00e7\u0131kt\u0131k\u00e7a 2 ila 6 kilometre aras\u0131nda hareket eder,” dedi ve ekledi: “Bu hareket, sert bir yatak \u00fczerindeki topraklama hatlar\u0131 i\u00e7in beklenenden daha y\u00fcksek mertebede.”
\nOkyanusa ula\u015fan buzullar\u0131n alt\u0131ndaki topraklama hatlar\u0131na ili\u015fkin geleneksel g\u00f6r\u00fc\u015f\u00fcn, bunlar\u0131n gelgit d\u00f6ng\u00fcleri s\u0131ras\u0131nda g\u00f6\u00e7 etmediklerini ve buz erimesi ya\u015famad\u0131klar\u0131n\u0131 s\u00f6yledi. Ancak yeni \u00e7al\u0131\u015fma, bu d\u00fc\u015f\u00fcnceyi, \u0131l\u0131k okyanus suyunun \u00f6nceden var olan buzul alt\u0131 kanallardan buzun alt\u0131na girdi\u011fi ve en y\u00fcksek erime oranlar\u0131n\u0131n topraklama b\u00f6lgesinde meydana geldi\u011fi bilgisiyle de\u011fi\u015ftiriyor.
\nAra\u015ft\u0131rmac\u0131lar, Petermann Buzulu’nun topraklama hatt\u0131n\u0131n 2016 ile 2022 aras\u0131nda yakla\u015f\u0131k 4 kilometre geri \u00e7ekilmesiyle, \u0131l\u0131k suyun buzulun alt taraf\u0131nda yakla\u015f\u0131k 200 metre y\u00fcksekli\u011finde bir oyuk a\u00e7t\u0131\u011f\u0131n\u0131 ve bu “apsenin” 2022 y\u0131l\u0131 boyunca orada kald\u0131\u011f\u0131n\u0131 buldular.
\nUCI D\u00fcnya sistem bilimi profes\u00f6r\u00fc ve NASA JPL biliminsanlar\u0131ndan ve \u00e7al\u0131\u015fman\u0131n yazarlar\u0131ndan olan Eric Rignot, “Bu buz-okyanus etkile\u015fimleri, buzullar\u0131 okyanus \u0131s\u0131nmas\u0131na kar\u015f\u0131 daha duyarl\u0131 hale getiriyor” dedi. “Bu dinamikler modellere dahil edilmiyor ve onlar\u0131 dahil edersek, deniz seviyesindeki art\u0131\u015f tahminleri y\u00fczde 200’lere kadar art\u0131racakt\u0131r.”
\nYap\u0131lan \u00e7al\u0131\u015fma, Gr\u00f6nland buz tabakas\u0131n\u0131n son birka\u00e7 on y\u0131lda okyanusa milyarlarca ton buz kaybetti\u011fini ve kayb\u0131n \u00e7o\u011funun D\u00fcnya’n\u0131n de\u011fi\u015fen ikliminin bir \u00fcr\u00fcn\u00fc olan yeralt\u0131 okyanus sular\u0131n\u0131n \u0131s\u0131nmas\u0131ndan kaynakland\u0131\u011f\u0131n\u0131 vurguluyor. Rignot’a g\u00f6re, okyanus suyuna maruz kalmak, buzul cephesindeki buzu kuvvetli bir \u015fekilde eritir ve buzullar\u0131n yerdeki hareketine kar\u015f\u0131 direnci a\u015f\u0131nd\u0131rarak buzun denize daha h\u0131zl\u0131 kaymas\u0131na neden olmakta.<\/p>\n","protected":false},"excerpt":{"rendered":"