Cryospheric Sciences | permafrost
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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]
Cryo-Comm – Degrading Terrains
Sam Illingworth October 11, 2019
Outside the Murtèl-Corvatsch monitoring site used in this study [Credit: Global Terrestrial Network for Permafrost ]
Beneath dusted peaks of mountain dew A dense and rigid backcloth skulks, Worn down and compacted with Fractured decades of aged powder; Trodden into rocky outcrops To lie barrenly against This frozen, ancient soil. Subtle shifts of these forgotten rocks Ripple across subterranean sediments, Dislodging once-stable foundations That now cascade like an ocean; Echoing across the fragile firmame ...[Read More]
The hidden part of the cryosphere – Ice in caves
Renato R. Colucci March 1, 2019
Fig. 1: Downloading meteorological parameters in a cave of the southeastern Alps [Credit: Renato R. Colucci (selfie)].
The cryosphere can be found in various places in many forms and shapes… in the atmosphere, on land and sea. A lesser known part of the cryosphere is hidden deep in the dark, in the cold-karstic areas of the planet: Ice caves! The ongoing climate change affecting ice all over the world is now rapidly melting these hidden ice masses as well. We therefore need to hurry up and try to collect as ...[Read More]
Image of the Week – Permafrost features disappearing from subarctic peatlands
Mariana Verdonen December 14, 2018
Remnants of palsa, most of which has already collapsed into surrounding pond [Credit: Mariana Verdonen].
Some of the most remarkable, marginal features of permafrost – palsas – are degrading and disappearing metre by metre from North European peatlands, and are driven close to extinction by the climate change. What are these permafrost features? A palsa is a peat mound with an icy core, which stays frozen throughout summer due to the insulating property of dry peat. These mounds can rise up to 10 met ...[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]
Image of the Week — Biscuits in the Permafrost
Eleanor Jones May 18, 2018
In Svalbard, the snow melts to reveal a mysterious honeycomb network of irregular shapes (fig. 1). These shapes may look as though they have been created by a rogue baker with an unusual set of biscuit cutters, but they are in fact distinctive permafrost landforms known as ice-wedge polygons, and they play an important role in the global climate. Ice-wedge polygons: Nature's biscuit-cutter In wint ...[Read More]
Image of the Week – Arctic changes in a warming climate
David Docquier January 12, 2018
Fig. 1: Schematic representation of major changes in the Arctic regions caused by global warming [Credit: Fig. 1.2 of AMAP (2017), adapted from US National Center for Atmospheric Research (NCAR)].
The Arctic is changing rapidly and nothing indicates a slowdown of these changes in the current context. The Snow, Water, Ice and Permafrost in the Arctic (SWIPA) report published by the Arctic Monitoring and Assessment Program (AMAP) describes the present situation and the future evolution of the Arctic, the local and global implications, and mitigation and adaptation measures. The report is base ...[Read More]
Image of the Week – Powering up the ground in the search for ice
Laura Helene Rasmussen September 22, 2017
In an earlier post, we talked briefly about below-ground ice and the consequences of its disappearing. However, to estimate the consequences of disappearing ground ice, one has to know that there actually is ice in the area of study. How much ice is there – and where is it? As the name suggests, below-ground ice is not so easy to spot with the naked eye. Using geophysical methods, however, ...[Read More]
Image of the Week – Heat waves during Polar Night!
François Massonnet June 23, 2017
The winter 2016-2017 has been one of the hottest on record in the Arctic. In our Image of the Week, you can see that air temperatures were positive in the middle of the winter! Let's talk about the reasons and implications of this warm Arctic winter. But first, let's take a tour in Svalbard, the gateway to the Arctic… A breach in the one of the world's largest seed vaults The Global S ...[Read More]