{"id":13092,"date":"2021-07-08T11:00:00","date_gmt":"2021-07-08T14:00:00","guid":{"rendered":"https:\/\/mindthegraph.com\/blog\/?p=13092"},"modified":"2023-01-05T13:48:01","modified_gmt":"2023-01-05T16:48:01","slug":"arctic-sea-ice-thinning-in-the-fast-lane","status":"publish","type":"post","link":"https:\/\/mindthegraph.com\/blog\/sv_se\/arktisk-sea-ice-thinning-in-the-fast-lane\/","title":{"rendered":"Arktis havsis tunnas ut, i snabbfilen"},"content":{"rendered":"

Arktis tunnas ut tv\u00e5 g\u00e5nger snabbare \u00e4n v\u00e4ntat.<\/strong><\/h2>\n\n\n\n

En uppdaterad modell visar att havsisen l\u00e4ngs Arktis kuster minskar tv\u00e5 g\u00e5nger snabbare \u00e4n v\u00e4ntat.<\/p>\n\n\n\n

Naturen f\u00f6rs\u00e4mras i takt med den globala uppv\u00e4rmningen och klimatf\u00f6r\u00e4ndringarna. N\u00e4r polarisarna sm\u00e4lter snabbt orsakar det en f\u00f6rlust av biologisk m\u00e5ngfald och v\u00e4cker oro \u00e4ven f\u00f6r havsniv\u00e5erna.<\/p>\n\n\n\n

Kolla upp Mind the Graph Galleri<\/a> f\u00f6r illustrationer relaterade till havsis. Klicka p\u00e5 bilden nedan!<\/p>\n\n\n\n

\"illustrationer<\/a><\/figure>\n\n\n\n

Havsisens tjocklek fungerar som en barometer f\u00f6r att f\u00f6rst\u00e5 tillst\u00e5ndet i den arktiska regionen. Ju tjockare isen \u00e4r, desto mer v\u00e4rmeisolerande fungerar den, vilket f\u00f6rhindrar att havsytans temperatur stiger under vintern och ger skydd mot v\u00e4rme under sommaren.<\/p>\n\n\n\n

Det \u00e4r ocks\u00e5 mindre sannolikt att den arktiska sommarsm\u00e4ltningen uppr\u00e4tth\u00e5lls av tunnare is.<\/p>\n\n\n\n

D\u00e4rf\u00f6r har forskare utv\u00e4rderat resultaten fr\u00e5n ett nyutvecklat datorprogram som \u00e4r avsett att uppskatta skillnaden i sn\u00f6djup \u00e5rligen och identifierat Havsisen tunnas ut<\/strong> accelererade mycket mer \u00e4n v\u00e4ntat.<\/p>\n\n\n\n

Unders\u00f6kningens syfte och m\u00e5l<\/strong><\/h2>\n\n\n\n

Eftersom havsist\u00e4cket d\u00e4mpar luft-vattenutbytet och v\u00e4rme\u00f6verf\u00f6ringen mellan haven och atmosf\u00e4ren, har det betydelse f\u00f6r regionala ekosystem, vindm\u00f6nster p\u00e5 halvklotet och det globala klimatet.<\/p>\n\n\n\n

Den termiska isoleringen \u00f6kar med tjockare havsis, s\u00e5 att temperaturerna h\u00e5lls l\u00e4gre p\u00e5 vintern.<\/p>\n\n\n\n

Det \u00e4r ocks\u00e5 havsisens tjocklek under sn\u00f6ackumulationen som best\u00e4mmer havsisens djup under vattenytan, vilket bidrar v\u00e4sentligt till den termodynamiska tillv\u00e4xten av havsisen. Havsisens tjocklek \u00e4r d\u00e4rf\u00f6r en viktig indikator p\u00e5 regionens h\u00e4lsa. <\/p>\n\n\n\n

Forskarna anv\u00e4nde sig av CryoSat-2<\/a> satellitradar f\u00f6r att m\u00e4ta havsisens tjocklek f\u00f6r denna studie.<\/p>\n\n\n\n

Syftet var att j\u00e4mf\u00f6ra de tillg\u00e4ngliga uppgifterna fr\u00e5n den gamla modellen med en ny modell som inbegrep klimatf\u00f6r\u00e4ndringar.<\/p>\n\n\n\n

Isens h\u00f6jd \u00f6ver vattnet kan best\u00e4mmas genom att ta tid p\u00e5 hur l\u00e5ng tid det tar f\u00f6r radarv\u00e5gor att reflekteras, vilket ger en uppskattning av dess tjocklek.<\/p>\n\n\n\n

SnowModel-LG, en lagrangisk sn\u00f6ackumuleringsmodell, anv\u00e4ndes f\u00f6r att f\u00f6ruts\u00e4ga det totala sn\u00f6djupet och densiteten p\u00e5 olika platser runt Norra ishavet genom att ta h\u00e4nsyn till vind, temperatur, nederb\u00f6rd och analys av isr\u00f6relser.<\/p>\n\n\n\n

D\u00e4refter kombinerades resultaten fr\u00e5n sn\u00f6modellen med data fr\u00e5n satellitradar f\u00f6r att uppskatta hur snabbt havsisen i Arktis minskar i tjocklek och hur den kan variera \u00f6ver tiden.<\/p>\n\n\n\n

\"stor<\/a>
Bildk\u00e4lla: Unsplash<\/a> av Cassie Matias<\/a><\/figcaption><\/figure>\n\n\n\n

Som ett resultat av detta:<\/strong><\/h2>\n\n\n\n

En faktor p\u00e5 50 procent lades till variationen i havsistjocklek i randhaven genom att inkludera variationen i sn\u00f6t\u00e4cket.<\/p>\n\n\n\n

Enligt deras studie bidrar fluktuationer i sn\u00f6t\u00e4cket till en allt st\u00f6rre del av variationen i den utl\u00e4sta tjockleken p\u00e5 havsisen, fr\u00e5n cirka 20% till mer \u00e4n 70% p\u00e5 en s\u00e4songsm\u00e4ssig tidsskala.<\/p>\n\n\n\n

Datadrivna trender fr\u00e5n SnowModel-LG observerades ocks\u00e5 i statistiken \u00f6ver havsisens tjocklek, vilket f\u00f6rst\u00e4rkte minskningar i omr\u00e5den d\u00e4r de redan fanns, och introducerade betydande f\u00f6rluster p\u00e5 platser som inte redan hade dem.<\/p>\n\n\n\n

\u00d6kande koldioxidavtryck leder till minskande isar eftersom m\u00e4nniskan har \u00f6kat antalet aktiviteter som p\u00e5verkar milj\u00f6n avsev\u00e4rt. Flera djurarter i polaromr\u00e5dena har ocks\u00e5 f\u00f6rlorat sina livsmilj\u00f6er p\u00e5 grund av sm\u00e4ltningen. En helhetssyn f\u00f6r att utv\u00e4rdera havsisens tjocklek kommer att ges genom deras integrerade modell, som \u00f6verbryggar klyftan mellan f\u00f6r\u00e5ldrade analyssystem och inf\u00f6rlivar faktorer som klimatf\u00f6r\u00e4ndringar.<\/p>\n\n\n\n

Deras forskning \u00e4r en viktig milstolpe som definitivt kan bidra till den st\u00f6rre bilden av den verkliga orsaken.<\/p>\n\n\n\n

F\u00f6r att f\u00e5 veta mer om deras forskning, kolla in referensen som n\u00e4mns nedan. <\/p>\n\n\n\n

Robbie D. C. Mallett, Julienne C. Stroeve, Michel Tsamados, Jack C. Landy, Rosemary Willatt, Vishnu Nandan, Glen E. Liston. Snabbare nedg\u00e5ng och h\u00f6gre variabilitet i havsistjockleken i de marginella arktiska haven n\u00e4r man tar h\u00e4nsyn till dynamiskt sn\u00f6t\u00e4cke. Kryosf\u00e4ren, 2021; 15 (5): 2429<\/a> DOI: 10.5194\/tc-15-2429-2021<\/a><\/p>","protected":false},"excerpt":{"rendered":"

Arktis tunnas ut tv\u00e5 g\u00e5nger snabbare \u00e4n v\u00e4ntat. En uppdaterad modell tyder p\u00e5 att havsisen l\u00e4ngs Arktis kuster minskar tv\u00e5 g\u00e5nger snabbare \u00e4n v\u00e4ntat. Naturen f\u00f6rs\u00e4mras i takt med den globala uppv\u00e4rmningen och klimatf\u00f6r\u00e4ndringarna. N\u00e4r polarisarna sm\u00e4lter snabbt leder det till en f\u00f6rlust av biologisk m\u00e5ngfald och v\u00e4cker oro [...].<\/p>","protected":false},"author":18,"featured_media":13111,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[959,28],"tags":[554],"yoast_head":"\nArctic Sea Ice Thinning, in the Fast Lane - MTG<\/title>\n<meta name=\"description\" content=\"Nature is deteriorating with increasing global warming and climatic changes, and the sea ice along the coasts of the Arctic is thinning two times faster than expected.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mindthegraph.com\/blog\/sv_se\/arktisk-sea-ice-thinning-in-the-fast-lane\/\" \/>\n<meta property=\"og:locale\" content=\"sv_SE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Arctic Sea Ice Thinning, in the Fast Lane\" \/>\n<meta property=\"og:description\" content=\"Nature is deteriorating with increasing global warming and climatic changes, and the sea ice along the coasts of the Arctic is thinning two times faster than expected.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mindthegraph.com\/blog\/sv_se\/arktisk-sea-ice-thinning-in-the-fast-lane\/\" \/>\n<meta property=\"og:site_name\" content=\"Mind the Graph Blog\" \/>\n<meta property=\"article:published_time\" content=\"2021-07-08T14:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-01-05T16:48:01+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/mindthegraph.com\/blog\/wp-content\/uploads\/2021\/07\/post-thinning-arctic-sea-facebook-01.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"628\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Bruna Soldera\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Arctic Sea Ice Thinning, in the Fast Lane\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/mindthegraph.com\/blog\/wp-content\/uploads\/2021\/07\/post-thinning-arctic.jpg\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Bruna Soldera\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Arctic Sea Ice Thinning, in the Fast Lane - 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