Categories Uncategorized Glacier Modeling Lab presentations at AGU 2021 Post author By kpoinar Post date December 8, 2021 No Comments on Glacier Modeling Lab presentations at AGU 2021 Jessica MejiaTalk 1, Spatial and Temporal Lags in Meltwater Propagation Through the Greenland Ice Sheet Hydraulic SystemTalk 2, Best practices for building a more inclusive glaciology through cryocommunity.org (Invited)View the CryoCommunity talk on YouTubeDonglai Yang: Numerical Modeling of Frictional Melting Dynamics Constrained by Surface Micro-RoughnessCourtney Shafer: Comparing the Shallow-Shelf and L1L2 Approximations using BISICLES in the Context of MISMIP+ with Buttressing EffectsKristin Poinar: Are the Sermilik Fjord glaciers terminus-controlled, runoff-controlled, or runoff-adapting? Decomposition of glacier speed maps at Helheim, Fenris, Midgard, and Pourquoi-Pas Glaciers, 2006-2019Link to eLightning poster Figure from Kristin’s eLightning poster about Helheim Glacier and other glaciers feeding Sermilik Fjord. The leading principal component (blue data on bottom panel) correlates with both the terminus position (p=0.003, red data) and a seasonal cycle with maximum in mid-July (p=0.05, blue dashed line) that is consistent with runoff-control. The terminus position itself correlates to this annual cycle (R=-0.11, p=0.1). Examining p-values and considering some commonality of the forcings, we classify Helheim Glacier as terminus-controlled over 2014-2021.This agrees with previous classifications of Helheim Glacier as usually terminus-controlled (2009, 2010, 2015, 2016, 2017) [1,2,3] and sometimes runoff-controlled (2013) . It agrees less with a study that found Helheim was runoff-controlled over 2009-2017 . Figure from Kristin’s eLightning poster. Sermilik Fjord, eastern Greenland, contains four major outlet glaciers. Helheim Glacier (westernmost) is the largest. The base map is a mosaic of Sentinel-2 images from summer 2019, by MacGregor et al. (2020). The wintertime terminus positions are from PROMICE. ← Autumn hike! Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Δ This site uses Akismet to reduce spam. Learn how your comment data is processed.