COLLABORATIVE RESEARCH: Determining Transient Physical Conditions Under the Southern Laurentide Ice Sheet Using Geologic Information and Numerical Modeling

9814371米克尔森使用地质信息和数值模拟确定南劳伦泰德冰盖下的瞬态物理条件。威斯康星州大学地质与地球物理系，道格拉斯R. MacAyeal（芝加哥大学地球物理科学系）和帕特里克M. Colgan（Department of Geology，Northeastern University）. 我们将通过整合冰川地质记录和数值冰盖模拟，重建威斯康星州晚期南部劳伦蒂德冰盖（SLIS）的动力学和冰下环境。 我们关注SLIS是因为从北到南的地貌组合有着鲜明的对比，并且冰盖的记录在时间和空间上都有很好的记录。 数据将在地理信息系统中进行组织和分析。 我们的冰盖模型是二维的，随时间变化的，并结合了上1公里的地下除了覆盖冰。 该模型将通过添加“地质包”来适应处理基底/地下过程。 这将包括永久冻土，水文，基础运动和直到动力学的治疗。这种建模将有助于我们了解五大湖地区冰川景观的形成条件。

9814371MickelsonDetermining Transient Physical Conditions under the Southern Laurentide IceSheet Using Geologic Information and Numerical Modeling by David M. Mickelson and Paul Cutler (Department of Geology and Geophysics, University of Wisconsin, Douglas R. MacAyeal (Department of Geophysical Sciences, University of Chicago) and Patrick M. Colgan (Department of Geology, Northeastern University). We will reconstruct the dynamics and subglacial environment of the southern Laurentide Ice Sheet (SLIS) during the late Wisconsin by integrating the glacial geologic record with numerical ice-sheet modeling. We focus on the SLIS because there are striking contrasts in landform assemblages from north to south, and the record of ice sheets is well documented in time and space. Data will be organized and analyzed in a geographic information system. Our ice-sheet model is two-dimensional, time-dependent, and incorporates the upper 1-km of the subsurface in addition to overlying ice. The model willbe adapted to handle basal/subsurface processes by adding a 'geologic package'. This will include treatment of permafrost, hydrology, basal motion and till dynamics. This modeling will help us understand the conditions of formation of the glacial landscape of the Great Lakes area.