Increased crevassing across accelerating Greenland Ice Sheet margins

1. 2025-02-09 at 7:20 PM UTC

   #1
   

   Obbe Alan What? [annoy my right-angled speediness]
   Increased crevassing across accelerating Greenland Ice Sheet margins
   
   

   Surface crevassing on the Greenland Ice Sheet is a large source of uncertainty in processes controlling mass loss due to a lack of comprehensive observations of their location and evolution through time. Here we use high-resolution digital elevation models to map the three-dimensional volume of crevasse fields across the Greenland Ice Sheet in 2016 and 2021. We show that, between the two years, large and significant increases in crevasse volume occurred at marine-terminating sectors with accelerating flow (up to +25.3 ± 10.1% in the southeast sector), while the change in total ice-sheet-wide crevasse volume was within measurement error (+4.3 ± 5.9%). The sectoral increases were offset by a reduction in crevasse volume in the central west sector (−14.2 ± 3.2%), particularly at Sermeq Kujalleq (Jakobshavn Isbræ), which exhibited slowdown and thickening over the study period. Changes in crevasse volume correlate strongly with antecedent discharge changes, indicating that the acceleration of ice flow in Greenland forces significant increases in crevassing on a timescale of less than five years. This response provides a mechanism for mass-loss-promoting feedbacks on sub-decadal timescales, including increased calving, faster flow and accelerated water transfer to the bed.

2. 2025-02-10 at 1:39 AM UTC

   #2
   

   Speedy Parker Black Hole
   More farmland
3. 2025-02-10 at 1:41 AM UTC

   #3
   

   Bambii<3u Tuskegee Airman
   Op is gay for the environment.
4. 2025-02-10 at 1:45 AM UTC

   #4
   

   ⠀⠀⠀⠀⠀⠀ Black Hole
   Crevassing has been happening for millions of years. It's nothing new.
5. 2025-02-10 at 1:56 AM UTC

   #5
   

   Bambii<3u Tuskegee Airman

   Originally posted by ⠀⠀⠀⠀⠀⠀ Crevassing has been happening for millions of years. It's nothing new.

   
   Your buttcheeks are crevASSing
6. 2025-02-10 at 1:57 AM UTC

   #6
   

   Bambii<3u Tuskegee Airman
   Butt that's been happening for millions of years. It's nothing new.
7. 2025-02-10 at 1:58 AM UTC

   #7
   

   Bambii<3u Tuskegee Airman
   Did u ever fry that guys motherboard? Or was he right???
8. 2025-02-10 at 3:17 AM UTC

   #8
   

   ⠀⠀⠀⠀⠀⠀ Black Hole

   Originally posted by Bambii<3u Did u ever fry that guys motherboard? Or was he right???

   
   Yep. It was fried like a strip of bacon on a Mexican sombrero.
9. 2025-02-10 at 3:43 AM UTC

   #9
   

   Speedy Parker Black Hole

   Originally posted by ⠀⠀⠀⠀⠀⠀ Yep. It was fried like a strip of bacon on a Mexican sombrero stored in a walk in freezer at the south pole.

   
   FTFY