Joe Mallalieu
@joemallalieu.bsky.social
470 followers 180 following 12 posts
Glaciologist & Research Fellow at the University of Birmingham. Researching how glaciers and ice sheets respond to a warming climate, glacial lakes and volcanism (not all at the same time) 🛰🗻📉
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joemallalieu.bsky.social
Thanks Connie, although I think @geomorphmark.bsky.social deserves at least some credit/blame for suggesting I try this in the first place!
Reposted by Joe Mallalieu
joemallalieu.bsky.social
Congrats @connieharpur.bsky.social! Great to see this primer on ice-marginal lakes in Greenland published. Get in touch with me or Connie if you need access!
connieharpur.bsky.social
Ice-marginal lakes across #Greenland- why do they matter?! 🇬🇱🧊 🌊

Our article in Geography introduces the importance of these chilly lakes and their impact on ice sheet change.

Read on for an IML crash-course plus some cool classroom tips ❄️💻✏️

@joemallalieu.bsky.social

shorturl.at/Z4jUh
joemallalieu.bsky.social
More super interesting glacier - volcano research here! Congrats Michael and Iestyn, great to see this published!
joemallalieu.bsky.social
Hi Nick - could you add me to the starter pack? Thanks for setting it up!
joemallalieu.bsky.social
Hi Dan - could you also add me to the starter pack? Thanks for setting it up!
joemallalieu.bsky.social
For further details please read the paper using the link above or get in touch. There will be plenty more to come on this subject!

7/7
joemallalieu.bsky.social
…therefore, increases in glacier velocities (as monitored by satellites) may provide advance warning of volcanic activity and eruptions. This is useful because ice-covered volcanoes are amongst the most dangerous globally and the most difficult to monitor.

6/7
joemallalieu.bsky.social
We think this is likely due to higher levels of geothermal heating near volcanoes melting the base of overlying glaciers, causing them to slide faster than other glaciers. This is important because volcanoes can exhibit increased volcanic heating months ahead of an eruption…

5/7
joemallalieu.bsky.social
When controlling for other environmental variables, we find that glaciers within 5 km of an active volcano have median velocities 46% greater than those of other glaciers and that, for glaciers near active volcanoes, velocities further increase with proximity to the volcano.

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A figure showing box plots of median glacier velocities for glaciers near a volcano (in pink) and other glaciers (in blue). Data is grouped by glacial region, and shows that the velocities of glaciers near volcanoes are typically greater than those of other glaciers in 9 of the 10 regions.
joemallalieu.bsky.social
In the paper we pull together glacier, volcano and climate data for the world’s 217,000 glaciers to isolate the effect of volcano proximity on glacier flow for the period 2017-2018.

3/7
joemallalieu.bsky.social
Thanks to our team at the University of Birmingham, Manchester Metropolitan University, @uniofaberdeen.bsky.social, Queen's University Belfast and Dickinson College, and our funders @leverhulme.bsky.social

2/7
joemallalieu.bsky.social
I'm pleased to announce our exciting new paper in Comms Earth & Environment: 'Proximity to active volcanoes enhances glacier velocity', in which we find glaciers located near volcanoes flow almost 50% faster than those located elsewhere. @natureportfolio.bsky.social
Available here: rdcu.be/dZ0Ie
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A cloud of volcanic ash emitting from the summit caldera of the glacier covered Mt Redoubt, Alaska during a 2009 eruption. Credit USGS.