climate change

Does debris cover offset glacier retreat in the Greater Caucasus?

Levan Tielidze April 3, 2020

Figure 1: Supra-glacial debris cover (SDC) change on the Elbrus Massif from 1986 to 2014. A SPOT-7 image is used as the background. Blue shows retreat of clean-ice parts. Clean ice in 1986 consists of the clean ice in 2014 (grey, transparent) plus clean-ice area that retreated between 1986 and 2014 (dark blue). Credit: Tielidze et al., 2020

In this week’s blog, Levan Tielidze tells us about supra-glacial debris cover change for the Greater Caucasus. His recent study indicates more than a doubling in the area of supra-glacial debris cover for the Elbrus Massif‘s glaciers from 1986 to 2014, the largest glacierized massif in the whole region. Glaciers on the western slope of the Elbrus Massif are affected by avalanches and thus ar ...[Read More]

Climate Change & Cryosphere – The fate of Georgian Glaciers

Levan Tielidze January 24, 2020

Display "The fate of Georgian Glaciers" from YouTube Click here to display content from YouTube. Learn more in YouTube’s privacy policy. Always display content from YouTube Open "The fate of Georgian Glaciers" directly Last week, we learned about the dramatic fate of the Hochjochferner, which has strongly retreated in the past years due to climate change. It represented just on ...[Read More]

Education in glaciology: Witnessing the death of a glacier

Olaf Eisen and Carleen Tijm-Reijmer January 17, 2020

Fig.1. View of the Hochjochferner and its prominent medial moraine during the “Almabtrieb” in September 2003. The bumps on the glacier are from support pillars of a ski lift. Photo credit: Carleen Tijm-Reijmer

The Karthaus summer school on Glaciers and Ice Sheets in the Climate System has a long history of training many generations of PhD students, thus forming professional networks that have lasted throughout their careers. The Karthaus summer school has been described in detail in a previous Cryoblog post. Here we want to focus on the story of a glacier… Hochjochferner, a retreating glacier One ...[Read More]

For Dummies – How do wildfires impact permafrost? [OR.. a story of ice and fire]

Jean Holloway November 1, 2019

Wildfire – like the ones observed in the Northwest Territories, Canada in 2014 (Fig. 1) – is a natural part of permafrost landscapes, but fires are expected to get more frequent and severe as the climate warms. This could accelerate the degradation of permafrost, with negative consequences on the local and global scale! We have a pretty good understanding of how permafrost responds to fire t ...[Read More]

Ice-hot news: The IPCC Special Report on the Oceans and the Cryosphere under Climate Change

Laura H. Rasmussen, Clara Burgard and Jenny Arthur October 30, 2019

[Credit: Martin Robles on Unsplash]

You have probably heard the name “Intergovernmental Panel on Climate Change (IPCC)” mentioned frequently over the last few years. The IPCC is the United Nations body for assessing science related to climate change and it publishes global assessment reports on this topic every 5 to 10 years. Due to the current urgency of the global climate crisis and the need for more information by decision makers ...[Read More]

Did you know? – Proglacial lakes accelerate glacier retreat!

Jenna Sutherland October 18, 2019

In a global context, New Zealand’s small mountain glaciers often get overlooked and yet they are a beautiful part of New Zealand’s landscape. They are the water towers for the South Island and an essential part of its tourism, thanks to a few undeniable heroes (Frans Josef and Fox Glaciers), but sadly, they may not be as prominent in the future. In this post we review the state of modern glaciatio ...[Read More]

Climate Change & Cryosphere – Why is the Arctic sea-ice cover retreating?

David Docquier September 13, 2019

Picture of Arctic sea ice with melt ponds [Credit: David Mark on Pixabay].

The Arctic Ocean surface is darkening as its sea-ice cover is shrinking. The exact processes driving the ongoing sea-ice loss are far from being totally understood. In this post, we will investigate the different causes of the recent retreat of the Arctic sea-ice cover, using the most updated literature… Arctic sea ice is disappearing Due to its geographical position centered around the Nort ...[Read More]

Image of the Week — Cavity leads to complexity

David Docquier April 19, 2019

A 10km-long, 4-km-wide and 350m-high cavity has recently been discovered under one of the fastest-flowing glaciers in Antarctica using different airborne and satellite techniques (see this press release and this study). This enormous cavity previously contained 14 billion tons of ice and formed between 2011 and 2016. This indicates that the bottom of the big glaciers on Earth can melt faster tha ...[Read More]

Image of the Week – Will Santa have to move because of Climate Change?

Violaine Coulon December 21, 2018

Because of global warming and polar amplification, temperature rises twice as fast at the North Pole than anywhere else on the planet. Could that be a problem for our beloved Santa Claus, who, according to the legend, lives there? It appears that Santa could very well have to move to one of its second residences before the end of this century. But even if he moves to another place, the smooth runn ...[Read More]

Ice-hot news: The cryosphere and the 1.5°C target

Lionel Favier, Laura H. Rasmussen, and Clara Burgard December 5, 2018

How will a warming of 1.5°C affect the cryosphere? [Credit: modified from pexels.com]

Every year again, the Conference of Parties takes place, an event where politicians and activists from all over the world meet for two weeks to discuss further actions concerning climate change. In the context the COP24, which started this Monday in Katowice (Poland), let’s revisit an important decision made three years ago, during the COP21 in Paris, and its consequences for the state of the cryo ...[Read More]