meltwater

GeoTalk: meet Francesco Avanzi, researcher in meltwater security!

Simon Clark December 15, 2022

Francesco Avanzi

Hi Francesco. Thanks for agreeing to this interview! To break the ice, could you tell our readers a bit about yourself and your research? Hey Simon! I’m an Italian hydrologist and earned a PhD at Politecnico di Milano with a dissertation on how snowmelt contributes to seasonal runoff. I then did a postdoc at UC Berkeley, California, where I collaborated with a major US hydropower company to improv ...[Read More]

Imaggeo On Monday: A meander in the meltwater valley

Julien Seguinot December 27, 2021

A meander in the meltwater valley . Credit: Julien Seguinot (distributed via imaggeo.egu.eu)

At the edge of the Greenland Ice Sheet, surface melt releases old layers of dust, that have travelled thousands of years into the ice. Under sunny weather, the dust heats up with radiation, melts the ice underneath, and thus accumulates in tiny potholes and meltwater creeks. However, this photo was taken after a rainy day. The rain triggered increased melt on the surface of the ice irrelevant of i ...[Read More]

Imaggeo On Monday: Contorted Streams on the Gates Glacier

Allen Pope December 20, 2021

Supraglacial streams in ogives, Gates Glacier

Annual ridges and troughs (called wave ogives) are formed as the ice of the Gates Glacier (in Alaska’s Wrangell Mountains) flows through a steep icefall. Down-glacier, as the ice melts, the rushing meltwater is funnelled into streams, carving ice canyons as it flows, but ultimately directed by these topographic constraints. Description by Allen Pope, after the description on imaggeo.e ...[Read More]

Imaggeo on Mondays: Sneaking up from above

Jan Blöthe May 8, 2017

Sneaking up from above . Credit: Jan Blöthe (distributed via imaggeo.egu.eu)

Take some ice, mix in some rock, snow and maybe a little mud and the result is a rock glacier. Unlike ice glaciers (the ones we are most familiar with), rock glaciers have very little ice at the surface. Looking at today’s featured image, you’d be forgiven for thinking the Morenas Coloradas rock glacier wasn’t a glacier at all. But appearances can be misleading; as Jan Blöthe (a researcher at the ...[Read More]