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LeConte Bay tidewater glacier moraine dynamics (2017-2019)

LeConte Glacier is the southernmost tidewater glacier in the northern hemisphere, and like many temperate glaciers provides abundant sediment to a narrow glacially incised fjord. Together with Dave Sutherland (UO) and colleagues at UAS and OSU, Emily investigated the morphology of the modern terminal moraine and dynamics of suspended sediments discharged by the glacial melt plume. Many tidewater glaciers undergo a “tidewater glacier cycle” of slow advance followed by rapid retreat. In some cases this cycle is mediated by the growth of the terminal moraine, though other fjord features like constrictions can mediate this cycle as well (Amundson & Carroll, 2017).

 

Recent papers from the LeConte project team:

Eidam, E.F., Sutherland, D.A., Duncan, D., Kienholz, C., Amundson, J.M., Motyka, R.J., 2020. Morainal bank evolution and controls on terminus dynamics during a tidewater glacier stillstand. JGR-Earth Surface. doi.org/10.1029/2019JF005359

Sutherland, D.A., Jackson, R.H., Kienholz, C., Amundson, J.M., Dryer, W.P., Duncan, D., Eidam, E.F., Motyka, R.J., Nash, J.D., 2019. Direct observations of submarine melt and subsurface geometry at a tidewater glacier. Science 365, no. 6451: 369-374. doi: 10.1126/science.aax3528

LeConte Glacier termini locations, 1940s to present (Fig. 2 in Eidam et al., 2020).

 

LeConte Glacier, 2018