multi_decadal_acceleration

Code associated with the manuscript 'Melt-induced ice surface steepening drives multi-decadal acceleration of the Greenland Ice Sheet interior', submitted for peer-review in April 2026.

📁 Repository Structure

├── data/
│   └── flowline_sampled/
│       ├── arcticDEM_v4_sampled_100m.csv
│       └── bedMachine_v5_sampled_150m.csv
│   └── PPP_outputs/
│       ├── f003_2021/
│       │   └── f003_1260.csv
│       ├── f004_2021/
│       │   └── f004_1210.csv
│       ├── kanu_2021/
│       │   └── kanu_1210.csv
│       ├── lev5_2009/
│       │   ├── lev51270.csv
│       │   └── lev51270.pos
│       ├── lev5_2021/
│       │   ├── lev5_1280_ol.csv
│       │   └── lev5_1280_ol.pos
│       ├── lev6_2009/
│       │   ├── lev61270.csv
│       │   └── lev61270.pos
│       └── lev6_2021/
│           ├── lev6_1260.csv
│           └── lev6_1260.pos
├── code/
│   ├── figure_1c.ipynb
│   ├── figure_2.ipynb
│   ├── figure_3.ipynb
│   ├── figure_4.ipynb
│   ├── figure_5a.ipynb
│   ├── figure_6.ipynb
│   ├── figure_7.ipynb
│   ├── figure_S2.ipynb
│   └── processing/
│       ├── driving_stress_calculation.ipynb
│       ├── ice_displacement_analysis.ipynb
│       └── extract_mean_X_Y_Z_from_PPP.ipynb
└── README.md

📊 Data Availability

Dataset	Period	Repository/Location
Ice velocity (F003, F004)	1996	Buffalo Remote Sensing Lab
Ice velocity (LEV5, LEV6)	2009–2013	Tedstone & Nienow (2018)
Ice velocity (LEV5, LEV6, KAN_U, F003, F004)	2021–2024	Tedstone et al. (2026)
Vertical displacement (LEV6)	2023	Tedstone et al. (2026)
Automatic weather station (KAN_M & KAN_U)	2009-2023	PROMICE Network
Ice surface elevation (Porter et al. 2023)	-	data/flowline_sampled/
Bed elevation (Morlighem et al. 2022)	-	data/flowline_sampled/
PPP outputs (LEV5, LEV6, KAN_U, F003, F004)	2009 & 2021	data/PPP_outputs/

📩 Queries

For questions regarding the code or data, please contact: Hannah Picton (hannah.picton@ed.ac.uk)