Roundup: Thawing Glaciers, Iceberg Calving, “Dead” Glaciers

Thawing Glaciers Release Pollutants 


“As glaciers increasingly melt in the wake of climate change, it is not only the landscape that is affected. Thawing glaciers also release many industrial pollutants stored in the ice into the environment. Now, within the scope of a Swiss National Science Foundation project, researchers from the Paul Scherrer Institute (PSI), Empa, ETH Zurich and the University of Berne have measured the concentrations of a class of these pollutants – polychlorinated biphenyls (PCB) – in the ice of an Alpine glacier accurately for the first time.”



Iceberg Calving is Extremely Sensitive to Climate Change


“Sea level rise is among the greatest threats due to climate change. Over the next century, ice sheets and glaciers will be one of the main contributors, through melting and calving of ice into the oceans. The amount of calved ice is not easy to reproduce in computer simulations, and due to the rapid and non-linear variability of calving fluxes, they are usually difficult to include in models forced by evolving climatic variables. Simulation of iceberg calving remains one of the grand challenges in preparing for future climate change.”

Read more at or at Nature Geoscience.


Black and White Photographs of “Dead” Glaciers


“I started from a data analysis conducted by the Swiss Glacier Monitoring Network to see the map of the glacier and its relative changement in the length variation from 1961 and 2011. It’s interesting the word used to call the part of a glacier that goes under a certain mass. They are called “dead”. All the pictures shown here are taken to the new entrance of the glacier, in the “dead” part of it. Looking at the map, 50 years ago, this would have been completely covered by the ice.”