I live in southern Wisconsin, USA, an area full of glaclal geology features. Drumlins seem such an enigmatic glacial feature. Easily recognized, but seemingly a mystery of how it is formed. What is the latest thoughts on how drumlins were formed. Are any noted from Antartica or Greenland? Asked by Daniel Many people think that …
Asked by MessiHe A great question! When we look at most glaciers and ice sheets, the velocity is higher at the marine-terminating snout. So what is going on? There are several factors at play here. Firstly, if the glacier is floating at its terminus, then there is zero friction or basal drag to slow down …
Asked by Andrea Well Andrea, this really got a lot of attention when I surveyed a group of my glaciology colleagues. There is no ‘official’ term, but there are some commonly used phrases,often taken from nautical terms, like ‘armada‘ or ‘flotilla‘. Armada is more often used for a very large group of icebergs (such as …
What is the official term to describe a group of icebergs? Read More »
Question: regarding Thwaites: I note that tectonic sources create warm water currents that are increasing the melt rate of the shelf and glacier, moving the grounding line inland. It seems that this is a “natural” occurrence, not related to climate change. If we are using Thwaites as an example of climate change, how do we …
Is Thwaites Glacier being warmed by natural tectonic activity? Read More »
Hi John, Great question! A 2021 study on the Thwaites glacier by Wild et al. suggests that the Thwaites pinning point will detach from the sea bed and reach floatation within the next decade, which has some serious implications for the Eastern Ice Shelf, and in turn, the whole Thwaites Glacier. They suggest that the …
Question: I read somewhere that lead deposits from Roman times (approx 2,000 years ago) have been discovered in ice cores approx 400 metres below the current ice surface in Greenland. As a non-scientific person, I am asking a very basic question: if the above information is correct, then that suggests that around 400 metres of …
Question: My name is Alexander Chladzynski, I am 11 and curious about many things. For a school project I am doing it on how Antarctica is melting. It would be awesome if you could give me some facts about Antarctica. Great question Alexander, the majority of ice melt in Antarctica is around the edges of …
Question: I’m teaching A-level Glaciation, and we have to talk about Ice Sheets and the landforms that they create and the one that is talked about often is an Ellipsoidal Basins especially related to the Laurentide Ice Sheet and Minnesota . I was wondering if you have any diagrams or simple explanation to explain the …
Hi Dennis, This is a really good question and it is not always clear in articles when they mention different amounts of warming. Typically, when articles say this, they refer to warming since the industrial period. The IPCC quantify amounts of warming relative to the period between 1850-1900 as this is when we saw the …
Hi Oliva, Great question! Staircase corries are also known as staircase cirques, this is when there are more than two cirques, where one is sat above another. Staircase cirques form with the same process as a stand alone cirque, beginning with a small hollow which overtime expands due to both physical and chemical weathering. You …
What are staircase corries and how do they form? Read More »
