{"id":139405,"date":"2022-05-16T01:03:07","date_gmt":"2022-05-16T06:03:07","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2022\/05\/a-flip-of-earths-magnetic-poles-42000-years-ago-may-have-led-to-mass-extinctions"},"modified":"2022-05-16T01:03:07","modified_gmt":"2022-05-16T06:03:07","slug":"a-flip-of-earths-magnetic-poles-42000-years-ago-may-have-led-to-mass-extinctions","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2022\/05\/a-flip-of-earths-magnetic-poles-42000-years-ago-may-have-led-to-mass-extinctions","title":{"rendered":"A Flip of Earth\u2019s Magnetic Poles 42,000 Years Ago May Have Led to Mass Extinctions"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/a-flip-of-earths-magnetic-poles-42000-years-ago-may-have-led-to-mass-extinctions.jpg\"><\/a><\/p>\n<p>A new study is revealing that a reversal in the Earth\u2019s magnetic poles 42,000 to 41,000 years ago may have led to <a class=\"\" href=\"https:\/\/science.sciencemag.org\/content\/371\/6531\/811\" rel=\"nofollow\" target=\"_blank\">environmental crises that resulted in mass extinctions<\/a>. The period is called the Laschamps excursion and the research used precise carbon dating obtained from ancient tree fossils to study its effects.<\/p>\n<p>The team details how they created a precise radiocarbon record around the time of the \u201cLaschamps geomagnetic reversal about 41,000 years ago from the rings of New Zealand swamp kauri trees.\u201d<\/p>\n<p>\u201cThis record reveals a substantial increase in the carbon-14 content of the atmosphere culminating during the period of weakening magnetic field strength preceding the polarity switch.\u201d The team concluded that the \u201cgeomagnetic field minimum caused substantial changes in atmospheric ozone concentration that drove synchronous global climate and environmental\u201d with their model investigating the consequences of this event.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A new study is revealing that a reversal in the Earth\u2019s magnetic poles 42,000 to 41,000 years ago may have led to environmental crises that resulted in mass extinctions. The period is called the Laschamps excursion and the research used precise carbon dating obtained from ancient tree fossils to study its effects. The team details [\u2026]<\/p>\n","protected":false},"author":662,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[493,12],"tags":[],"class_list":["post-139405","post","type-post","status-publish","format-standard","hentry","category-climatology","category-existential-risks"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/139405","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/662"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=139405"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/139405\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=139405"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=139405"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=139405"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}