CR
Cryospheric Sciences

Geophysics

Did you know? We can see what’s going on inside an ice shelf using geophysics!

April 2, 2024
Did you know? We can see what’s going on inside an ice shelf using geophysics!
Figure 1: Halley VI research station, glowing in the late summer sun.

Understanding what is going on inside an ice shelf is important for many reasons. But mostly, it allows us to better understand their contribution to sea level rise, and to understand how they are changing and evolve over time, with our changing climate. Geophysical methods offer a means to be able to see inside an ice shelf, and get an idea of their properties. Read on to find out a bit more abou ...[Read More]

Hidden beneath the surface – what can we learn from an ice sheet’s internal stratigraphy?

October 28, 2022
Hidden beneath the surface – what can we learn from an ice sheet’s internal stratigraphy?
The ski-equipped Polar-6 Basler aircraft from the Alfred-Wegener Institute (AWI) flying an ice-penetrating radar from Rothera research base. The radar antennas are visible under the wings. Photo credit: Michael Fischer, AWI.

Hidden beneath the surface of ice sheets lies an intricate structure carrying a unique fingerprint of past ice flow and climate conditions. Disentangling the drivers of an ice sheet’s enigmatic stratigraphy could theoretically unravel the ice sheet’s past evolution and provide a much clearer picture of things to come in the future. One way to detect this mysterious stratigraphy is to use ice-penet ...[Read More]

The softness of ice, how we measure it, and why it matters for sea level rise

June 25, 2021
The softness of ice, how we measure it, and why it matters for sea level rise
Figure: The Scott Polar Research Institute’s beautiful fabric maps show that Antarctica is composed of the combination of many different aspects, including snow, rocks, volcanoes, and biological life. Although the fabric of ice does not refer to material textiles, the analogy is similar in that ice fabric represents the physical composite of all its constituent ice crystals. [Image credit: Derek Langley / Naomi Chapman (SPRI University of Cambridge)]

One of the first things school children learn is that ice is a solid, and forms by freezing water. Most people think of ice as brittle–have you ever dropped a slippery ice cube on the kitchen floor, and watch it break and shatter into many pieces? It may be surprising, then, to find that ice can also stretch and squeeze, like a ball of pizza dough! Once deformed, ice is then softer in certai ...[Read More]

Did you know… about the ice content in mountain permafrost?

June 12, 2020
Did you know… about the ice content in mountain permafrost?
Photo 1: Permafrost monitoring site at Stockhorn ridge (foreground), in front of the glacierized Monte Rosa massif (Valais, Swiss Alps). Photo credit: Coline Mollaret

Through the eyes of a researcher studying mountain processes in the European Alps in the context of a global warming climate, let’s discover how geophysical methods help to better understand frozen ground! Permafrost defines a thermal state, i.e. permafrost is soil, sediment, or rock that remains at or below 0°C during at least two consecutive years. As permafrost is only defined by its temperatur ...[Read More]

Back to the Front – Larsen C Ice Shelf in the Aftermath of Iceberg A68!

November 8, 2017
Back to the Front – Larsen C Ice Shelf in the Aftermath of Iceberg A68!
Figure 1: A68 sets sail from Larsen C.
Sentinel 1 SAR image [Credit: Adrian Luckman, Swansea University].

Much of the Antarctic continent is fringed by ice shelves. An ice shelf is the floating extension of a terrestrial ice mass and, as such, is an important ‘middleman’ that regulates the delivery of ice from land into the ocean: for much of Antarctica, ice that passes from land into the sea does so via ice shelves. I’ve been conducting geophysical experiments on ice for over a decade, using mostly s ...[Read More]