Ski or water ski? Carnival season is typically when many drive straight to the mountains to indulge in their favorite winter sport. However, by the end of the century, models seem to predict a very different future for Carnival, with a drastic reduction in the number of snow days we get per year. This could render winter skiing something of the past, a bedtime story we tell our grandchildren at ni ...[Read More]
Social media platforms offer every person with internet access the possibility to share content of various kind. The recent increase in social media use globally give birth to new tools and insights, from a different perspective. The size of, and the global nature of the user driven social media, makes one expect it to include information also about geomagnetic activity related to posts of visual ...[Read More]
Name of proxy Fluctuations of mountain glaciers Type of record Geomorphological features Paleoenvironment Continent – High mountain areas Period of time investigated From historical periods (c.a. 300 years ago) to the end of the Pleistocene (up to 200 000 years back in time) How does it work? Mountain – or “alpine” – glaciers are small ice bodies (from 1 to 10 000 km2). Alt ...[Read More]
The Gap, the Bridge, and the Game-changer are three series of satellites. They carry instruments that measure the microwave radiation emitted by the Earth (called passive microwave instruments), while flying 800 km above our heads at 7,5 km/s. Since the late 1970s, most sea ice properties (concentration, extent, area, velocity, age and more!) have been measured with such passive microwave instrume ...[Read More]
Lava domes form when lava is extruded from a volcanic vent, but is too viscous to flow far away. Think of thick treacle that does not flow as easily as runny honey, and so when it is extruded, it forms a “lava pile” around the vent. Lava domes commonly form within the crater of a larger volcano (e.g. Mt. St. Helens), but can also stand alone or form part of a “dome complex”. A lava dome can take o ...[Read More]
As NhET, we have the pleasure to have Mauro Agate as our guest and interviewee today. We discuss about submarine canyons and related geo-hazards. Further details will be available at: http://www.sciencedirect.com/science/article/pii/S0967064513002488 for a scientific-oriented audience; or https://www.youtube.com/channel/UCwWErQNoZYpJhhkxPa82x5g for a broader audience. Dr. Mauro Agate is a ...[Read More]
Snow, sub-zero temperatures for several days, and then back to long grey days of near-constant rain. A normal winter week in Gothenburg, south-west Sweden. Yet as I walk home in the evening, I can’t help but notice that piles of ice have survived. Using the equations that I normally need to investigate the demise of Greenland glaciers, I want to know: how hard can it be to melt this pile of ice by ...[Read More]
Kerry Leith from the Engineering Geology Department at the ETH Zürich set up a post on their latest publication and the backstory behind it. As they announced on their own website (www.stressdriven.com) review comments ranged from “mediocre or poor” to “[…] provocative, potentially revolutionary (if correct) analysis”. It surely contains interesting thoughts. – ...[Read More]
Paris, 2000 ya. Claude is sweating all over. It’s mid-July and the sun is burning on his skin. With his hammer and shovel he is digging up grey and white stones. The faults and fractures in the rock help him to get the rocks out easily. But still, it’s hot and humid and his shift isn’t over yet. Luckily he can’t complain about the view. Lutetia, one of the new Roman settlements lies right in front ...[Read More]
Professor Tamsin Mather, a volcanologist in Oxford’s Department of Earth Sciences reflects on her many fieldwork experiences at Masaya volcano in Nicaragua, and what she has learned about how they effect the lives of the people who live around them. Over the years, fieldwork at Masaya volcano in Nicaragua, has revealed many secrets about how volcanic plumes work and impact the environment, ...[Read More]
