{"id":28059,"date":"2023-06-21T08:35:00","date_gmt":"2023-06-21T06:35:00","guid":{"rendered":"https:\/\/www.deepseareporter.com\/?p=28059"},"modified":"2023-06-21T08:35:01","modified_gmt":"2023-06-21T06:35:01","slug":"extrem-varmebolja-i-havet-kan-orsaka-massdod","status":"publish","type":"post","link":"https:\/\/www.deepseareporter.com\/sv\/extrem-varmebolja-i-havet-kan-orsaka-massdod\/","title":{"rendered":"Extrem v\u00e4rmeb\u00f6lja i havet kan orsaka massd\u00f6d"},"content":{"rendered":"\n<p><strong>Det \u00e4r varmare \u00e4n vanligt i Nordsj\u00f6n och Nordatlanten. Det kan handla om en av de v\u00e4rsta marina v\u00e4rmeb\u00f6ljorna n\u00e5gonsin. H\u00e5ller temperaturerna i sig kan det inneb\u00e4ra massd\u00f6d f\u00f6r fiskar, alger, sj\u00f6gr\u00e4s och musslor.<\/strong><\/p>\n\n\n\n<p>-Det \u00e4r v\u00e4ldigt allvarligt, s\u00e4ger oceanografen Ola Kal\u00e9n.<\/p>\n\n\n\n<p>Yttemperaturen i norra Atlanten och i Nordsj\u00f6n, i synnerhet utanf\u00f6r Englands nord\u00f6stra kust och v\u00e4stra Irland, \u00e4r p\u00e5 vissa platser fyra\u2013fem grader \u00f6ver det normala f\u00f6r den h\u00e4r tiden p\u00e5 \u00e5ret. D\u00e4r har den p\u00e5g\u00e5ende marina v\u00e4rmeb\u00f6ljan klassats som kategori fyra p\u00e5 en femgradig skala, vilket betyder extrem, av den amerikanska v\u00e4dermyndigheten NOAA.<\/p>\n\n\n\n<p>-Extrem \u00e4r det minsta man kan s\u00e4ga. Det kan vara en av de v\u00e4rsta marina v\u00e4rmeb\u00f6ljorna n\u00e5gonsin, s\u00e4ger Ola Kal\u00e9n, oceanograf vid SMHI, till TT.<\/p>\n\n\n\n<p>Det r\u00e5der ocks\u00e5 h\u00f6gre temperaturer \u00e4n normalt f\u00f6r \u00e5rstiden i ett stort omr\u00e5de i Nordatlanten, fr\u00e5n V\u00e4stafrikas kust och hela v\u00e4gen upp till Nordsj\u00f6n.<\/p>\n\n\n\n<p>-Det \u00e4r en speciell situation och v\u00e4ldigt allvarligt. Den st\u00f6rsta orsaken \u00e4r klimatupphettningen, s\u00e4ger Kal\u00e9n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&#8221;Olycklig kombination&#8221;<\/h2>\n\n\n\n<p>Men klimatf\u00f6r\u00e4ndringarna \u00e4r inte den enda orsaken till v\u00e4rmeb\u00f6ljan i norra Atlanten och Nordsj\u00f6n. Det finns en m\u00e4ngd olika teorier kring vilka andra faktorer som har bidragit till de ovanligt h\u00f6ga niv\u00e5er som registrerats de senaste m\u00e5naderna.<\/p>\n\n\n\n<p>-Det \u00e4r en olycklig kombination av fr\u00e4mst klimatupphettning och sedan m\u00e4nskliga orsaker men \u00e4ven naturliga klimatvariationer som har staplats p\u00e5 varandra, s\u00e4ger Kal\u00e9n.<\/p>\n\n\n\n<p>Men det \u00e4r sv\u00e5rt att svara exakt p\u00e5 vilka processer som har bidragit eftersom vi inte har sett hur det h\u00e4r slutar \u00e4n. Det beh\u00f6vs en grundlig analys, kanske f\u00f6rst efter det att El Ni\u00f1o-situationen \u00e4r \u00f6ver.<\/p>\n\n\n\n<p>Det storskaliga v\u00e4derfenomenet El Ni\u00f1o gjorde sitt officiella int\u00e5g i tropiska Stilla havet den 8 juni. Det har stor p\u00e5verkan p\u00e5 v\u00e4dret i omr\u00e5det och kommer p\u00e5 sikt ocks\u00e5 ge den globala medeltemperaturen en skjuts upp\u00e5t.<\/p>\n\n\n\n<p>-Det \u00e4r os\u00e4kert hur mycket det bidrar till det som sker runt Storbritannien just nu, men globalt sett har det redan stark p\u00e5verkan. Men vi \u00e4r i startfasen av El Ni\u00f1o och effekterna sprider sig fr\u00e5n tropiska Stilla havet efter hand, s\u00e4ger Kal\u00e9n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Hotar ekosystem<\/h2>\n\n\n\n<p>Marina v\u00e4rmeb\u00f6ljor, allts\u00e5 l\u00e5ngvariga perioder med extremt h\u00f6ga ytvattentemperaturer, kan skada ekosystemen i havet. Redan nu har det f\u00f6rekommit skadlig algblomning i Nordsj\u00f6n. Men h\u00e5ller de h\u00f6ga temperaturerna i vattnet utanf\u00f6r den brittiska kusten i sig \u00f6ver hela sommaren kan l\u00e4get bli riktigt allvarligt f\u00f6r djur och v\u00e4xter.<\/p>\n\n\n\n<p>-Det \u00e4r sv\u00e5rast f\u00f6r dem som inte kan flytta p\u00e5 sig, till exempel sj\u00f6gr\u00e4s och musslor. Den extrema v\u00e4rmen f\u00e5r kaskadeffekter, blir det mindre v\u00e4xtplankton s\u00e5 blir det mindre f\u00f6da f\u00f6r fiskar och det sprider sig l\u00e4ngre upp i n\u00e4ringsv\u00e4ven, s\u00e4ger Kal\u00e9n.<\/p>\n\n\n\n<p>Riktigt kraftiga v\u00e4rmeb\u00f6ljor kan leda till massd\u00f6d av fiskar men ocks\u00e5 av havsf\u00e5glar. De sv\u00e4lter helt enkelt ihj\u00e4l n\u00e4r det blir \u00f6kad konkurrens om f\u00f6dan.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&#8221;Varningsklockor&#8221;<\/h2>\n\n\n\n<p>-M\u00e5nga kurvor som r\u00f6r tillst\u00e5ndet i haven har sett m\u00e4rkliga ut under \u00e5ret, enligt Kal\u00e9n.<\/p>\n\n\n\n<p>I april gjordes en rekordnotering f\u00f6r genomsnittstemperaturen i v\u00e4rldshavens ytvatten och det \u00e4r ocks\u00e5 v\u00e4ldigt l\u00e5g utbredning av havsis i Antarktis f\u00f6r den h\u00e4r tiden p\u00e5 \u00e5ret.<\/p>\n\n\n\n<p>-Det \u00e4r m\u00e5nga kurvor som ser konstiga och ovanliga ut. Vi ser m\u00e5nga extrema h\u00e4ndelser i klimatsystemet just nu, s\u00e4ger Kal\u00e9n.<\/p>\n\n\n\n<p>Det \u00e4r viktigt f\u00f6r alla att inse att det enda vi kan g\u00f6ra f\u00f6r att f\u00f6rs\u00f6ka f\u00f6rminska detta \u00e4r att s\u00e5 snabbt som m\u00f6jligt minska utsl\u00e4ppen. Det \u00e4r tydliga varningsklockor, g\u00f6r vi inget \u00e5t det h\u00e4r kommer situationen att f\u00f6rv\u00e4rras och det snart.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Det \u00e4r varmare \u00e4n vanligt i Nordsj\u00f6n och Nordatlanten. Det kan handla om en av de v\u00e4rsta marina v\u00e4rmeb\u00f6ljorna n\u00e5gonsin. H\u00e5ller temperaturerna i sig kan det inneb\u00e4ra massd\u00f6d f\u00f6r fiskar, alger, sj\u00f6gr\u00e4s och musslor.<\/p>\n","protected":false},"author":4,"featured_media":28057,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[244],"tags":[1288,724,1396,1395,1394],"class_list":["post-28059","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-klimat-och-miljo","tag-el-nino","tag-klimatpaverkan","tag-marina-varmeboljor","tag-massdod","tag-varmare-hav"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.0 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Extrem v\u00e4rmeb\u00f6lja i havet kan orsaka massd\u00f6d - Deep Sea Reporter<\/title>\n<meta name=\"description\" content=\"Det \u00e4r varmare \u00e4n vanligt i Nordsj\u00f6n och Nordatlanten. 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This New Year's Day is the first day after Britain's Brexit split with the European bloc's vast single market for people, goods and services, and the split is predicted to impact the Northern Ireland border. 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