Support the Arctic Sea Ice Forum and Blog

Author Topic: Paleoclimate study (Pliocene -> Pleistocene)  (Read 2175 times)

Pmt111500

  • Guest
Paleoclimate study (Pliocene -> Pleistocene)
« on: October 26, 2014, 05:51:39 AM »
Enhanced carbon drawdown by the ocean circulation changes during Pliocene - Pleistocene boundary coincident with the beginning of Pleistocene glacials, by models : http://news.rutgers.edu/news/past-climate-change-was-caused-ocean-not-just-atmosphere-new-rutgers-study-finds/20141023

jai mitchell

  • Nilas ice
  • Posts: 2078
    • View Profile
  • Liked: 116
  • Likes Given: 24
Re: Paleoclimate study (Pliocene -> Pleistocene)
« Reply #1 on: October 31, 2014, 02:40:32 PM »
This is very interesting.  I always expected that a slowdown of the Meridional Overturning Circulation would lead to higher globally averaged temperatures.  Even though most northern hemisphere centric analyses showed a regional cooling (especially in Europe!).  I had spent more time considering carbon cycle feedbacks and atmospheric fraction impacts (due to significantly reduced oceanic carbon sequestration)

http://www.nature.com/ngeo/journal/v6/n2/full/ngeo1680.html

But, of course, reduced conveyor current flow yields significantly less upwelling, warmer surface temperatures and a reduced oceanic heat sink.   Only a very small shift in the heat absorption budget between ocean and atmosphere will yield significant changes in globally averaged surface temperatures.  And more, the rate of change of temperatures.
Haiku of Past Futures
My "burning embers"
are not tri-color bar graphs
+3C today

jai mitchell

  • Nilas ice
  • Posts: 2078
    • View Profile
  • Liked: 116
  • Likes Given: 24
Re: Paleoclimate study (Pliocene -> Pleistocene)
« Reply #2 on: October 31, 2014, 03:58:13 PM »
  ANDRIL drilling documentary from Ross Ice Shelf
Haiku of Past Futures
My "burning embers"
are not tri-color bar graphs
+3C today