CR
Cryospheric Sciences

methane

The Proglacial Puzzle: Sampling of Glacier-fed Lakes in Greenland

July 11, 2025
The Proglacial Puzzle: Sampling of Glacier-fed Lakes in Greenland
Figure 1: Sampling on top of a frozen proglacial lake - April 2025, 67° 7′ 46.95″ N, 50° 6′ 41.21″ W . Photo: Joost van Genuchten

Would you like to follow the endeavours of a small team working in the ice-marginal terrain in South-West Greenland? They set out to investigate proglacial lakes using sediment coring, water sampling and gas collections (figure 1), aiming to better understand methane dynamics, proglacial terrain development and the environmental drivers behind methane production in glacially influenced lake system ...[Read More]

It’s getting hot in here: Ancient microbes in thawing permafrost

October 22, 2021
It’s getting hot in here: Ancient microbes in thawing permafrost
Figure 1: You wondered what can live in frozen, ancient soil? Here you can see intact (A) and thawing permafrost (B). While Bacilli (red) and spore formers (green) can survive in the frozen and thawed permafrost, other species, such as Actinobacteria (blue) do not like it too much when it thaws. Carbon gets digested into carbon dioxide (CO2) and methane (CH4), of which most is released into the atmosphere. Little is known about fungi (light brown) but they do exist. [Credit: Maria Scheel, created with biorender.com]

Did you know that the oldest organism on Earth is believed to be a microorganism found in 3-million-year-old permafrost in Siberia? There, it was living at a cosy average temperature of -10 °C at 14 m depth. Or did you hear that some other Arctic soil microorganisms can happily live at extreme temperatures down to -40 °C? Scientists often use these “extreme” microorganisms to get an idea on how ex ...[Read More]