{"id":182287,"date":"2023-10-13T09:15:15","date_gmt":"2023-10-13T13:15:15","guid":{"rendered":"https:\/\/web.uri.edu\/gso\/?p=182287"},"modified":"2023-10-13T09:15:50","modified_gmt":"2023-10-13T13:15:50","slug":"marine-geology-and-geophysics-seminar-october-20","status":"publish","type":"post","link":"https:\/\/web.uri.edu\/gso\/uncategorized\/marine-geology-and-geophysics-seminar-october-20\/","title":{"rendered":"Marine Geology and Geophysics Seminar, October 20"},"content":{"rendered":"<h3>Speaker<\/h3>\n<p><strong>Dr. Harriet Lau, Assistant Professor, Brown University<\/strong><\/p>\n<h2><em>Evolving Solid Earth Dynamics as a Trigger for the Mid Pleistocene Transition<\/em><\/h2>\n<h3>Abstract<\/h3>\n<p>Milankovitch cycles\u2014orbital modulations in Earth&#8217;s insolation\u2014are thought to pace ice ages over the last 2.6 million years, with dominant periods associated with changes in precession (~20,000 years) and obliquity (~40,000 years). While Milankovitch cycles have not changed over tens of millions of years, Earth&#8217;s climatic response has. In particular, the Mid Pleistocene Transition (MPT), ~1 million years ago, is defined by an enigmatic shift between ice ages paced every ~40,000 to ~100,000~years. In this talk, we will explore solid Earth feedbacks (i.e., crustal rebound\/subsidence) on the ice age system using a climate model that accounts for variation in the timescale of crustal deformation associated with changes to the length-scale of ice ages and duration of ice loading. I will demonstrate that the impact of the feedback mechanism is significantly larger in the late Pleistocene relative to the early Pleistocene, and hypothesize that this sensitivity played a crucial role in driving the MPT.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Speaker Dr. Harriet Lau, Assistant Professor, Brown University Evolving Solid Earth Dynamics as a Trigger for the Mid Pleistocene Transition Abstract Milankovitch cycles\u2014orbital modulations in Earth&#8217;s insolation\u2014are thought to pace ice ages over the last 2.6 million years, with dominant periods associated with changes in precession (~20,000 years) and obliquity (~40,000 years). While Milankovitch cycles [&hellip;]<\/p>\n","protected":false},"author":2120,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[1],"tags":[],"class_list":["post-182287","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/web.uri.edu\/gso\/wp-json\/wp\/v2\/posts\/182287","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/web.uri.edu\/gso\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/web.uri.edu\/gso\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/web.uri.edu\/gso\/wp-json\/wp\/v2\/users\/2120"}],"replies":[{"embeddable":true,"href":"https:\/\/web.uri.edu\/gso\/wp-json\/wp\/v2\/comments?post=182287"}],"version-history":[{"count":3,"href":"https:\/\/web.uri.edu\/gso\/wp-json\/wp\/v2\/posts\/182287\/revisions"}],"predecessor-version":[{"id":182290,"href":"https:\/\/web.uri.edu\/gso\/wp-json\/wp\/v2\/posts\/182287\/revisions\/182290"}],"wp:attachment":[{"href":"https:\/\/web.uri.edu\/gso\/wp-json\/wp\/v2\/media?parent=182287"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/web.uri.edu\/gso\/wp-json\/wp\/v2\/categories?post=182287"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/web.uri.edu\/gso\/wp-json\/wp\/v2\/tags?post=182287"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}