Retreat of Humboldt Gletscher, North Greenland, driven by undercutting from a warmer ocean

Eric Rignot, Lu An, Nolwenn Chauché, Mathieu Morlighem, Seongsu Jeong, Michael Wood, Jeremie Mouginot, Joshua Willis, Ingo Klaucke, Wilhelm Weinrebe & Andreas Muenchow
Humboldt Gletscher is a 100-km wide, slow-moving glacier in north Greenland which holds a 19-cm global sea level equivalent. Humboldt has been the fourth largest contributor to sea level rise since 1972 but the cause of its mass loss has not been elucidated. Multi-beam echo sounding data collected in 2019 indicate a seabed 200 m deeper than previously known. Conductivity temperature depth (CTD) data reveal the presence of warm water of Atlantic origin at 0°C...
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