Glaciologist & geophysicist @NASAGoddard keen on Earth's ice and beyond. Views my own. He/him 🇬🇧 🇨🇦 🇺🇸 👨👩👧 🐱 🐶 🐶
Earth!
Joined May 2011
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Joe MacGregor retweeted
I'm back on this hellish platform to share something important: the Randolph Glacier Inventory (RGI) version 7.0 is released!
Find out more on our new user guide glims.org/rgi_user_guide
and in the thread below 🧵
Joe MacGregor retweeted
From the Artic Command Facebook page today;
“TSUNAMI IN DICKSON FJORD
Arctic Command was contacted on 17 September by a person on board the cruise ship OCEAN ALBATROS. The person was previously employed by SIRIUS, and he was therefore able to ascertain quite quickly that SIRIUS' station on Ella Ø did not look as it used to.
The inquiry resulted in the Arctic Command starting to investigate what had happened at Ella Ø. Everything indicated that a tsunami had hit and washed a lot of material into the sea. As Ella Ø was abandoned for the season, luckily there were no injuries.
On Sunday afternoon, the inspection ship KNUD RASMUSSEN arrived at Ella Ø. The ship was nearby after last week's task with the grounded cruise ship in Alpefjord. Also personal from SIRIUS arrived soon after. With the help of the crew of KNUD RASMUSSEN, they started the clean-up work.
Arctic Command launched an overflight with the Challenger aircraft, which took pictures of the area on 19 September. From the pictures, it indicated that a mountain had fallen into the water, and a tsunami had subsequently hit Dickson Fjord and Ella Ø.
The clean-up work has been completed, and thus the case is closed for the Arctic Command.
Photos can be used by crediting: SIRIUS/Arktisk Kommando” – at Greenland
Joe MacGregor retweeted
***Opportunity to work for NASA at @NASAJPL of @Caltech***
We are looking for a candidate to study the general interactions (broadly defined) between climate and solid Earth. Drop me a line if you are interested.
Please spread the word!
jpl.jobs/job/R2232/Postdocto…
Joe MacGregor retweeted
Thwaites Glacier Eastern Ice Shelf from Sentinel-1 over the last eight years. I suspect it won't be long before total collapse. 1080p video can be downloaded here: aluckman4.wixsite.com/ade-s-…
Joe MacGregor retweeted
⏳ This call for postdoctoral fellows to join our group closes at the end of August (31/8). All positions include the possibility for #Greenland fieldwork. Very fine to email me queries about the positions, or living and working in Denmark, at [email protected].
👇
We are hiring two to three postdoctoral fellows to join us at GEUS (geus.dk) for periods of 24 and 30 months to work on Greenland glaciology themes.
Details - candidate.hr-manager.net/App… - closes 31 August 2023.
Joe MacGregor retweeted
QGreenland, led by @twilamoon, is a free and open-source mapping tool to support interdisciplinary Greenland-focused research, teaching, decision making, and collaboration. It is modeled after the Norwegian Polar Institute’s Quantarctica tool. Learn more: nsidc.org/our-research/featu…
Joe MacGregor retweeted
Emptying of Suicide Basin which caused the #Mendenhall Glacier #GLOF downstream, Juneau, Alaska
🌊❄️🔥
apps.usgs.gov/hivis/camera/A…
For Greenland Ice Sheet radiostratigraphy v2, I've been refining ARESELP method of predicting layers before tracing them. Working well and fast. 1. 12 concatenated CReSIS radargrams; 2. Raw ARESELP layers; 3. Quick ARESELP clean-up; 4. Flattened radargram: much easier to trace!
Joe MacGregor retweeted
Check out our new pre-print led by postdoc Vincent Verjans on using deep neural networks to speed up subglacial hydrology modeling by 800x and hopefully pave the way for fully coupled simulations of entire ice sheets with subglacial hydrology doi.org/10.22541/essoar.1688…
Joe MacGregor retweeted
What impact has leaving the EU had on UK polar science ? I think you could not conceive a simpler and more effective way to damage it. We have to recognise this before we can fix it. Starting by rejoining @CopernicusEU to save our space sector
Very cool
We can watch how the Greenland ice sheet is lifted by the pooling of subglacial water using InSAR. Pooled water propagates like a water-snake along NEGIS in episodic splurges.
Check out our new paper in GRL: J K Andersen et al. 2023 : agupubs.onlinelibrary.wiley.…
Joe MacGregor retweeted
You don’t normally see stories like this in institutional publications
“One of the reasons we lose women in glaciology is that the media still presents us as ‘badass scientists’ — I hate that. It’s this unhelpful, risk-taking, individualistic mentality.”
blogs.oregonstate.edu/strata…
Joe MacGregor retweeted
Delighted to showcase an exciting image on the cover of this month's MAPS issue📸
Here we have a shock-deformed feldspar grain displaying alternate twin deformation from the #Hiawatha impact structure, Greenland 🇬🇱☄️
Don't miss this discussion tomorrow at 1pm Eastern!
Join the @IARPCCollab's Glaciers and Sea Level Community of Practice next Thursday, June 8, at 1pm EDT to discuss Community Engagement in Glaciology with @iceclimate and @nadiaseet_PhD! iarpccollaborations.org/memb… @CryoKaitlin @ZoeCourville
Joe MacGregor retweeted
In Praise of Mystery: US Poet Laureate Ada Limón has penned a tribute to the connections between two ocean worlds, Earth and Jupiter’s moon Europa. You’re invited to sign the poem, and #SendYourName aboard our spacecraft to Jupiter: go.nasa.gov/MessageInABottle