geomorphology

A new glacier chronology from New Zealand

Levan Tielidze July 15, 2022

Figure 1. An example of a dated moraine landform from the Southern Alps. Yellow dots indicate the location of the samples. The black ages are from boulders while the blue ages are from bedrock. The dimension of each age is a thousand years old. The red initials indicate sample names (Credit: Tielidze et al., 2022).

In this week’s blog, Levan Tielidze tells us about the new glacier history from the Southern Alps of New Zealand, an important piece of information to better understand the climatic history of Earth during the Quaternary, the current geologic period. Quaternary glaciations Geochronological dating of glacial moraines is useful for determining the extent and timing of past glaciation and for reconst ...[Read More]

Taiwan’s Icy Past

TJ & CJ Young May 6, 2022

The bustling cityscape of Taipei at dusk. Notice the mountains that surround the entire city! [Credit: TJ & CJ Young]

The beautiful island of Taiwan (as given by its colonial name, Ilha Formosa) is primarily known for its lush tropical forests, delicious culinary cuisine, bubbling hot springs, and a bustling cityscape. But, what does Taiwan have to do with the cryosphere? Before you resist the urge to leave and get a bubble tea, read on to find out about Taiwan’s cryospheric past! From cities to mountains Taiwan ...[Read More]

The new glacial geomorphological map from New Zealand

Levan Tielidze April 2, 2021

Glacial geomorphological mapping comparison in 3D. a - Moraine ridge in the middle section of the Ahuriri River valley with surrounding area. b - Key landscape elements are shown in the accompanying sketch. (Credit: Tielidze et al., 2021).

Geomorphological maps are a fundamental tool to represent landforms and understand how different morphological elements and agents shaped a natural landscape. They are also important as background information for many fields of research including ecology, forestry and of course, glaciology. In this week’s blog, Levan Tielidze tells us about the importance of mapping glacial geomorphology, presenti ...[Read More]

Running a live stream of proglacial processes

Floreana Miesen and Stuart Lane November 4, 2020

Sampling in the glacier-fed stream near the field camp. Photo: Floreana Miesen

In Switzerland, nothing is really remote, but some places are more so than others. Dense infrastructure networks typically provide convenient access to research sites in the Alps where it is difficult to feel far away from home. However, this is not always the case… For us, our home for the summer is a bit different. We work at 2400 m above sea level in Southern Switzerland, in a narrow vall ...[Read More]

Image of the Week – Vibrating Ice Shelf!

Emma C. Smith December 22, 2017

Fig. 1: Geophones in the evening on the Ekström Ice Shelf, Antarctica. These devices are used to record seismic waves that are sent into the ice and bound back [Credit: Emma Smith]

If you listen carefully to the Ekström ice shelf in Antarctica, a strange sound can be heard! The sound of a vibrating truck sending sounds waves into the ice. These sound waves are used to “look” through the ice and create a seismic profile of what lies beneath the ice surface. Read on to find out how the technique works and for a special Cryosphere Christmas message! What are we doing with this ...[Read More]

Image of the Week – It’s all a bit erratic in Yosemite!

Emma C. Smith January 13, 2017

Figure 1: Glacial erratic rocks in Yosemite National Park [Credit: Yuvak Sadeh via Imaggeo]

When you think of California, with its sun-soaked beaches and Hollywood glamour, glaciers may not be the first thing that spring to mind – even for ice nerds like us. However, Yosemite National Park in California’s Sierra Nevada is famous for its dramatic landscape, which was created by glacial action. With our latest image of the week we show you some of the features that were left behind b ...[Read More]

Image of the Week – Canyons Under The Greenland Ice Sheet!

Michael Cooper June 24, 2016

Figure 1: The calculated drainage network for southern Greenland (interpreted from airbourne ice penetrating radar data). It shows an extensive flow network of channels beneath the ice. Which can be interpreted as a possible configuration for water flow pre-glacially, as well as in an ice-free future. The main channel within the catchment area of Jakobshavn Isbræ is marked by the red line. Bed elevation (between 300 and 1300 m above sea level (asl)) is also shown. Inset: location of study area within Greenland.

The Greenland Ice Sheet contains enough water to raise sea level by 7.36 meters (Bamber, et. al. 2013) and much of this moves from the interior of the continent into the oceans via Jakobshavn Isbræ – Greenland’s fastest flowing outlet glacier. An ancient river basin hidden beneath the Greenland Ice Sheet, discovered by researchers at the University of Bristol, may help explain the loca ...[Read More]

Image of the Week — Historical aerial imagery of Greenland

Mette Bendixen May 27, 2016

Aerial photo of the Zackenberg delta in North-East Greenland taken in 1932. (Credit: Danish Geodata Agency)

A few month ago, we were taking you on a trip back to Antarctic fieldwork 50 years ago, today we go back to Greenland during 1930s! When geopolitics serves cryospheric sciences The Permanent Court of International Justice in The Hague awarded Danish sovereignty over Greenland in 1933 and besides geopolitical interests, Denmark had a keen interest in searching for natural resources and new opportun ...[Read More]