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## Content structure
### Inventory
`subglacial_lake_event_inventory_37locations.gpkg`: GeoPackage file in the NSIDC Sea Ice Polar Stereographic North projection (EPSG:3413) showing the locations of 37 active lakes. The attribute field `no` corresponds to the no. of the lake presented in the paper. (See the Conversion table below.)
### Workflows
`[LocationName]/analysis*.ipynb`: Workflow for each [LocationName] (see conversion table below). These Jupyter notebooks start by downloading ArcticDEM and ICESat-2 data and end with the visualization of the lake elevation change. To execute `analysis*.ipynb`, one needs the following auxiliary files which are included in the data set:
- `ArcticDEM_Strip_Index_s2s041_*.gpkg`: Subset of the ArcticDEM strip index, containing the strip outlines within a single RGI region.
- `RGI2000-v7.0-G-*.zip`: RGI 7.0 glacier outlines in a single RGI region.
- `[LocationName]/refgeo-[LocationName].gpkg`: A rectangle extent at the lake area, defining where to process the data.
- `[LocationName]/[LocationName]-off-ice-exclusion.gpkg`: Polygons that indicate non-stable ground. ICESat-2 points falling within the polygons are not used for aligning the DEMs.
#### Conversion table between location name and lake number
| Lake number | Location name |
| -------------- | ---------------------- |
| 1 | MilneTerminus |
| 2 | Milne |
| 3-a | MilneCentral (left) |
| 3-b | MilneCentral (top) |
| 3-c | MilneCentral (right) |
| 4-a | OttoN (bottom) |
| 4-b | OttoN (top) |
| 5 | IcebergE |
| 6 | AgassizSWMinor1 |
| 7 | TaggartLake |
| 8 | MittieNE |
| 9 | YelvertonNW |
| 10 | UnnamedFW |
| 11 | UnnamedHSE |
| 12 | Antoinette |
| 13 | AgassizSWMinor2 |
| 14 | MittieMain |
| 15 | ClydeRiverSW |
| 16 | PennyN |
| 17 | PennyW |
| 18 | SvenHedin |
| 19 | MittieMinor |
| 20 | OttoNW |
| 21 | Otto |
| 22 | Disraeli |
| 23 | UnnamedF |
| 24 | Airdrop |
| 25 | LakeToubergE |
| 26 | GoodFriday (top) |
| 27 | GoodFriday (bottom) |
| 28 | Dlberville |
| 29 | AgassizSWMain (top) |
| 30 | AgassizSWMain (bottom) |
| 31 | JolliffeNArm |
| 32 | MittieNW |
| 33 | BylotNE |
| 34 | ClydeRiverW |
### Results
1. `[LocationName]/[LocationName]_15m_hydroevent-evmd-bitmask_[Suffix].tif`: Main results for each glacier. Different suffixes mean:
- `slope`: dh/dt of the linear model; $a_1$ in Eq. (1)
- `duration`: total length of $t$ of the linear model
- `dh`: maximum short-term dh of the sigmoid model; see Eq. (4)
- `t`: timing of the maximum short-term dh of sigmoid model
- `gp-dh`: maximum short-term dh of the GP model
- `gp-t`: timing of the maximum short-term dh of the GP model
2. `[LocationName]/[LocationName]_15m_hydroevent-evmd-bitmask_viz*.png`: Visualization of the results.
3. `[LocationName]/[LocationName]_15m_median_topo.tif` Median topography of all the available DEM strips.
4. `[LocationName]/deminput_processed.csv`: List of the ArcticDEM strip DEMs used in the analysis. The third column represents the 1-sigma uncertainty in m.
5. `[LocationName]/ref_elevs.csv`: reference elevations extracted from the ICESat-2 ATL-6 data; for DEm alignment.
6. `[LocationName]/refgeo-[LocationName]_15m.tif`: Reference grid geometry. All the resulting geotiffs have the same image extent and size as this image. |