BEGIN:VCALENDAR VERSION:2.0 PRODID:-//18.83.4.138//NONSGML kigkonsult.se iCalcreator 2.20// CALSCALE:GREGORIAN METHOD:PUBLISH X-WR-CALNAME:Oceans at MIT X-WR-CALDESC:Striving to understand\, harness and sustain Earth'\;s def ining frontier. X-FROM-URL:http://oceans.mit.edu X-WR-TIMEZONE:America/New_York BEGIN:VTIMEZONE TZID:America/New_York X-LIC-LOCATION:America/New_York BEGIN:STANDARD DTSTART:20171105T020000 TZOFFSETFROM:-0400 TZOFFSETTO:-0500 RDATE:20181104T020000 TZNAME:EST END:STANDARD BEGIN:DAYLIGHT DTSTART:20180311T020000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:EDT END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:07cgr7507fgt1fefaaikgpjdm0@google.com DTSTAMP:20180503T095443Z CATEGORIES: CONTACT: DESCRIPTION:Title: Delayed CO2 emissions from mid-ocean ridge volcanism as a possible cause of late-Pleistocene glacial cycles\n\nAbstract: The coupl ed 100\,000 year variations in ice volume\, temperature\, and atmospheric CO2 during the late Pleistocene are generally considered to arise from a c ombination of orbital forcing\, ice dynamics\, and ocean circulation. Als o previously argued is that changes in glaciation influence atmospheric CO 2 concentrations through modifying subaerial volcanic eruptions and CO2 em issions. Building on evidence that ocean ridge volcanism responds to chang es in sea level\, it is suggested that ocean ridges play an important role in generating late-Pleistocene 100 ky glacial cycles.\n\nIf all volcanic CO2 emissions responded immediately to changes in pressure\, subaerial and ocean-ridge volcanic emissions anomalies would oppose one another. At oc ean ridges\, however\, the egress of CO2 from the mantle is delayed by ten s-of-thousands of years\, or longer\, owing to ascent time. A simple mode l involving temperature\, ice\, and CO2 is presented that oscillates at ~1 00 ky time scales when incorporating a delayed CO2 contribution from ocea n ridge volcanism\, even if the feedback accounts for only a small fractio n of total changes in CO2.\n\nFor more information\, please see our event website. DTSTART;TZID=America/New_York:20160912T120000 DTEND;TZID=America/New_York:20160912T130000 LOCATION:Ida Green Lounge (9th Floor)\, Building 54\, Cambridge\, MA\, Unit ed States SEQUENCE:0 SUMMARY:PAOC Colloquium: Peter Huybers (Harvard) URL:http://oceans.mit.edu/event/paoc-colloquium-peter-huybers-harvard X-ALT-DESC;FMTTYPE=text/html:\\n\\n\\n\\n\\nTitle: Delayed C O2 emissions from mid-ocean ridge volcanism as a possible cause of late-Pl eistocene glacial cycles\n\nAbstract: The coupled 100\,000 year variations in ice volume\, temperature\, and atmospheric CO2 during the late Pleisto cene are generally considered to arise from a combination of orbital forci ng\, ice dynamics\, and ocean circulation. Also previously argued is that changes in glaciation influence atmospheric CO2 concentrations through mo difying subaerial volcanic eruptions and CO2 emissions. Building on eviden ce that ocean ridge volcanism responds to changes in sea level\, it is sug gested that ocean ridges play an important role in generating late-Pleisto cene 100 ky glacial cycles.\n\nIf all volcanic CO2 emissions responded imm ediately to changes in pressure\, subaerial and ocean-ridge volcanic emiss ions anomalies would oppose one another. At ocean ridges\, however\, the egress of CO2 from the mantle is delayed by tens-of-thousands of years\, o r longer\, owing to ascent time. A simple model involving temperature\, i ce\, and CO2 is presented that oscillates at ~100 ky time scales when inco rporating a delayed CO2 contribution from ocean ridge volcanism\, even if the feedback accounts for only a small fraction of total changes in CO2. \n\nFor more information\, please see our event website. END:VEVENT END:VCALENDAR