RAGMAC Experiment Data

RAGMAC Glacier Volume Change Intercomparison Experiment

The present website provides you with the basic information and data required for the intercomparison experiments.

More information about the experiments is given in a GoogleDoc.

You may download the zipped data packages using the links given below or through the directory index.

Note on COPY RIGHTS: all provided DEMs are only to be used for research related to RAGMAC. For any other purposes, the terms of use must be clarified with the original data provider.

Deadlines - pease submit your results until the following dates:

+ Mandatory glacier regions for experiment 1 (Aletsch, Hintereis) and 2 (Baltoro): 30 January 2022

+ Optional glacier regions for experiment 1 (Vestisen) and 2 (FJL, NPI): 27 February 2022

+ Final submission of results and corrections: 31 March 2022

Data submission:
Please submit your results in one zip-file (max 100 GB) using the following Switch Drive.

EXPERIMENT 1

Tasks: Use all or a selection of the provided DEMs – either ASTER or TDX – to estimate mean thickness (m) and volume (km³) changes for the provided glaciers outlines for the indicated validation period. Please apply all corrections (e.g., co-registration to reference DEM, mosaicking, void filling, correction to validation period) needed for assessing the glacier elevation and volume changes and related systematic and random uncertainties. Note that there is no conversion to mass changes needed. The focus of this experiment is on the time problem – try to match the validation period as best as possible, including seasonal corrections if need. More information is given in the GoogleDoc.

Deliverables:
+ For each glacier in the '*_selection.shp' file, provide glacier-wide results and related uncertainties (95% conf. interval) in corresponding CSV-files: results-template.csv, error-template.csv
+ Elevation change fields as GEOTIFF in WGS84 and in the UTM projection of the input data.
+ Extended abstract as PDF including authors, affiliations, author contributions, description of processing steps, applied corrections and uncertainty assessment.

Please name your deliverables accoring to the following naming convention:
Author_PU_GLACIER_END-DATE_START-DATE_RUN_results/errors/abstract.csv/tiff/pdf

While:
+ AUTHOR: your choice, but short! (Note that full author lists can be given in the abstract.)
+ PU: political unit (e.g., AT, CH, CL, NO, PK, RU)
+ END-/START-DATE: YYYY-MM-DD
+ RUN: CTL: control (without seasonal correction); SEAS: seasonal correction applied.
For more details on these runs, please check the GoogleDoc.

CH, Grosser Aletschgletscher (mandatory)
+ ASTER, experiment DEMs (336 MB)

+ TanDEM-X, experiment DEMs (1,140 MB)

+ Copernicus, reference DEM, (8 MB)

+ Glacier outlines from RGI 6.0 (5 MB): ...

+ Validation period: 13 SEP 2011 to 21 SEP 2017

AT, Hintereisferner (mandatory)
+ ASTER, experiment DEMs (305 MB)

+ TanDEM-X, experiment DEMs (1,023 MB)

+ Copernicus, reference DEM, (6 MB)

+ Glacier outlines from RGI 6.0 (5 MB)

+ Validation period: 08 OCT 2010 to 21 SEP 2019

NO, Vestisen (optional)
+ ASTER, experiment DEMs (96 MB)

+ TanDEM-X, experiment DEMs (477 MB)

+ Copernicus, reference DEM, (5 MB)

+ Glacier outlines from RGI 6.0 (5 MB)

+ Validation period: 02 SEP 2008 to 10 AUG 2020

EXPERIMENT 2

Tasks: Use all or a selection of the provided DEMs – ASTER, TDX, or both – to estimate mean thickness (m) and volume (km³) changes for the provided glacier outlines for the survey periods as indicated below. Participants are encouraged to provide different results from different configurations of their processing workflow by switching off some processing steps (i.e., co-registration, penetration correction, ...). The focus of this experiment is on the processing problem, which means to evaluate how the different processing steps/corrections impact the overall volume change estimates. More details are provided in the GoogleDoc.

Please name your deliverables accoring to the following naming convention:
Author_PU_GLACIER_END-DATE_START-DATE_RUN_results/errors/abstract.csv/tiff/pdf

While:
+ AUTHOR: your choice, but short! (Note that full author lists can be given in the abstract.)
+ PU: political unit (e.g., AT, CH, CL, NO, PK, RU)
+ END-/START-DATE: YYYY-MM-DD
+ RUN: CTL: control (without seasonal correction); NO-CO: no coregistration; NO-BIAS: no bias correction / de-ramping; NO-PEN: no penetration depth correction; NO-GAP: no gap filling applied (only measured pixels); NO-FILT: no post-processing filtering applied; SEAS: seasonal correction applied.
For more details on these runs, please check the GoogleDoc.

PK, Baltoro (mandatory)
+ ASTER, experiment DEMs (740 MB)

+ TanDEM-X, experiment DEMs (95 MB)

+ SRTM-C, experiment DEM (27 MB, updated with new version 10 Jan 2022)

+ Copernicus, reference DEM, (32 MB)

+ Glacier outlines from RGI 6.0 (42 MB)

+ Validation period: 01 FEB 2000 to 01 OCT 2012 to 01 OCT 2019

+ Runs: please provide at least results for the control run, the seasonal correction (if needed), and co-registration. Additional runs are welcome but optional.

RU, Franz Joseph Land (FJL, optional)
+ ASTER, experiment DEMs (1,250 MB)

+ TanDEM-X, experiment DEMs (3,930 MB)

+ Copernicus, reference DEM, (25 MB)

+ Glacier outlines from RGI 6.0 (5 MB)

+ Validation period: 01 DEC 2010 to 01 DEC 2017

CL, Northern Patagonian Icefield (NPI, optional)
+ ASTER, experiment DEMs (1,340 MB)

+ TanDEM-X, experiment DEMs (1,527 MB, complemented with additional DEMs 14 Feb 2022)

+ SRTM-C, experiment DEM (75 MB, updated with new version 10 Jan 2022)

+ Copernicus, reference DEM, (59 MB)

+ Glacier outlines from RGI 6.0 (5 MB)

+ Validation periods: 01 FEB 2000 to 01 MAR 2014 to 01 MAR 2019

Support

If you run into problems with downloading above data or if you have questions with regard to the data or the exeriment, please contact wgms@geo.uzh.ch

last update: 23 March 2022 by mze