当前位置： 首页»科学研究» 科研动态 【11.17讲座】Stopping the Flood: Could We Use Targeted Geoengineering to Mitigate Sea Level Rise? 发布时间：Tue Nov 14 17:47:00 CST 2017

主  题：Stopping the Flood: Could We Use Targeted Geoengineering to Mitigate Sea Level Rise?

主讲人：Dr.Mike Wolovick

时  间：13:30 to 15:30, November 17^th, 2017

地  点：Room 520 of Jingshikeji Building B

讲座内容介绍：

The Marine Ice Sheet Instability is an important tipping point in the response of the world’s ice sheets to a warming climate. If the instability is activated, sea levels could rise rapidly. Here, we propose that targeted geoengineering could be used to slow or delay sea level rise due to the marine ice sheet instability. We introduce one specific idea, that an artificial sill could be used both to block warm water from reaching the grounding line and to provide an artificial ice rise that increases back-stress in the floating ice shelf. Using a simple model of Thwaites Glacier, West Antarctica, we find that an ice sheet collapse can be slowed or reversed for hundreds of years if deep warm water is blocked from reaching the grounding line. Blocking of deep warm water causes ice shelf thickening, regrounding on the sill, and grounding line readvance. Experiments with sill erosion suggest that even a very weak sill could delay ice sheet collapse for centuries. Many outstanding questions related to ocean circulation, cost, decision-making, and unintended consequences remain for future research.

主讲人简介:

Mike Wolovick is a postdoctoral research fellow in the Atmosphere and Ocean Sciences program at Princeton University and the Geophysical Fluid Dynamics Laboratory (GFDL).  He earned his M.A., M.Phil., and Ph.D. in geophysics from the Lamont-Doherty Earth Observatory at Columbia University and his B.A. from Bowdoin College.  He is an expert in ice sheet modeling, ice sheet dynamics, basal hydrology, ice-penetrating radar, and the internal structures of ice sheets. 

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