Joe MacGregor

Glaciologist & geophysicist @NASAGoddard keen on Earth's ice and beyond. Views my own. He/him 🇬🇧 🇨🇦 🇺🇸 👨‍👩‍👧 🐱 🐶 🐶

[Fabien Maussion @FabClimate]

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 https://t.co/Rz0d5mT1et

and in the thread below 🧵

[Orla Joelsen @OJoelsen]

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”

[Surendra Adhikari (सुरेन्द्र अधिकारी) @AlpineGlaciers]

***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!

https://t.co/I6A5xVr6V4

[Adrian Luckman @adrian_luckman]

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: https://t.co/bc1fh7OKdA

[William Colgan, Ph.D. @GlacierBytes]

⏳ 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].
👇

[National Snow and Ice Data Center @NSIDC]

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: https://t.co/rNkJZWv47K

[Melaine Le Roy @subfossilguy]

Emptying of Suicide Basin which caused the #Mendenhall Glacier #GLOF downstream, Juneau, Alaska
🌊❄️🔥
https://t.co/rmDaenHwou

[Andrew Dessler @AndrewDessler]

Our actual climate policy

[Joe MacGregor @JoeMacGregor]

awesome

[EastGRIP Camp @egripcamp]

Our drillers, Steff and Trevor, with the bedrock mud core (gray scale, taken in red light)

[Joe MacGregor @JoeMacGregor]

@gayciologist @drewchrist_geo @UTGeophysics ben: great work on this, loved this figure and clear modeling outcome, paper has a nice coherent message and contextualized well with earlier work

[Joe MacGregor @JoeMacGregor]

Here is the ~final result after ~3 hours of tracing

[Joe MacGregor @JoeMacGregor]

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 @JoeMacGregor]

@icy_pete @UMNews @US_IceDrilling @HakaiInstitute @NSF @UWEnvironment @UNBC @brianmenounos @CFANS @JuliaAndreasen @UMNswac way to go! 😎🤠🥳

[Orla Joelsen @OJoelsen]

#Ilulissat #Greenland #July10 2023.
-from Facebook

[Alex Robel @iceclimate]

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 https://t.co/TRCgrtBwa3

[Joe MacGregor @JoeMacGregor]

@icy_pete @UMNews @US_IceDrilling @HakaiInstitute @UWEnvironment @UNBC @brianmenounos @JuliaAndreasen @LKirkpatrick98 @CFANS @UMNswac

[Andy Shepherd @AndyShep_CPOM]

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

[Joe MacGregor @JoeMacGregor]

Very cool

[Aslak Grinsted @AGrinsted]

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 : https://t.co/bHQF3RXXWs

[ern. @ErinEARoss]

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.”

https://t.co/UHdIF844Gc