Reduced Future Summer Water Availability in the Tien Shan due to Glacier Wastage

Data sources and scripts List of all data sources and script used for the manuscript entitled "Reduced summer water availability in the Tien Shan due to glacier wastage" In this folder/document, you will find: 1) A list of all the data sources used for glacier modeling and the creation of the hybrid product with results from ISIMIP3b. 2) Scripts required for glacier modelling, covering processes from surface mass balance to ice dynamics. Please note that the current version of the GloGEM code is provided as is (without technical support). Comprehensive documentation is currently in preparation, together with the release of an open-source version on GitHub. 3) The codes used to process the results and generate the hybrid product of GloGEM(flow) and ISIMIP. 1) Data used in the models Datasets required for Glacier Modelling: · Climatic data reanalysis: https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-pressure-levels-monthly-means?tab=form · Climatic data future (GCMs): https://aims2.llnl.gov/search/cmip6 · Glacier outlines from RGIv6: https://www.glims.org/RGI/rgi60_dl.html · DEM data of SRTM: https://dwtkns.com/srtm30m/ · Ice thickness data from the consensus estimate: https://www.research-collection.ethz.ch/handle/20.500.11850/315707 (based on https://www.nature.com/articles/s41561-019-0300-3) · Geodetic mass balances: https://doi.org/10.6096/13 (based on https://www.nature.com/articles/s41586-021-03436-z) · Debris thickness and coverage: https://nsidc.org/data/hma_dte/versions/1 (based on https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2020GL091311) Results of the Global Hydrological Models in ISIMIP · All the results (discharge, total runoff, potential total water withdrawal) produced from the Global Hydrological Models in ISIMIP can be directly downloaded from: https://data.isimip.org/ - ISIMIP3a (Observed climate): https://data.isimip.org/search/tree/ISIMIP3a/ - ISIMIP3b (GCM climate): https://data.isimip.org/search/tree/ISIMIP3b/ Hydrological basins and discharge data · The hydrological basins were downloaded from: https://www.hydrosheds.org/products/hydrobasins · The basin outlines were subsequently slightly modified in QGIS, and they can be provided on further request. · The discharge measurements used for the comparison in Fig. 4 are obtained or digitised from - Marti et al. (2023): Marti, B., Yakovlev, A., Karger, D.N., Ragettli, S., Zhumabaev, A., Wakil, W.A. and Siegfried, T.: CA-discharge: Geo-Located Discharge Time Series for Mountainous Rivers in Central Asia. Scientific Data, 10, 579, https://www.doi.org/10.1038/s41597-023-02474-8, 2023 - Zhang et al. (2020): Zhang, Q., Chen, Y., Li, Z., Fang, G., Xiang, Y., Li, Y. and Ji, H.: Recent changes in water discharge in snow and glacier melt-dominated rivers in the Tienshan Mountains, central Asia. Remote Sensing, 12(17), 2704, https://doi.org/10.3390/rs12172704, 2020 - Krysanova et al. (2015): Krysanova, V., Wortmann, M., Bolch, T., Merz, B., Duethmann, D., Walter, J., Huang, S., Tong, J., Buda, S. and Kundzewicz, Z.W.: Analysis of current trends in climate parameters, river discharge and glaciers in the Aksu River basin (Central Asia). Hydrological Sciences Journal, 60(4), 566-590, https://www.doi.org/10.1080/02626667.2014.925559, 2015 2) Modelling scripts (.zip file) Codes for Glacier Modelling (please note that we are currently working on a open-source version of GloGEM) · The provided .pro scripts (IDL) in the subfolder “GloGEM” are used to model the mass balance of the glaciers (GloGEM). - input.pro: Used to prepare the input and the settings to run GloGEM. - glogem.pro: Running GloGEM. - More information on how to run GloGEM can be requested to Matthias Huss, co-author of the study. · The provided .m scripts (Matlab) in the subfolder “GloGEMflow” are used to model the dynamics of the glaciers (GloGEMflow). - main.m: Starting GloGEMflow. This script calls all other subroutines. - All subroutines in the folder are started subsequently (different functions). - More information on how to run GloGEMflow can be requested to Lander Van Tricht · Both sub-models are coupled offline. This means that the results of GloGEM are read in into GloGEMflow. 3) Processing scripts (.zip file) Codes for processing the results and generating the hybrid product of the GloGEMflow and ISIMIP · The provided .m scripts (Matlab) are used to process the results, generate the hybrid product of GloGEMflow and ISIMIP and create the main figures. - A.nr.name.m: All the scripts starting with A are used to process and plot the ice volume evolution. - B.nr.name.m: All the scripts starting with B are used to process and plot the glacier runoff evolution. - C.nr.name.m: All the scripts starting with C are used to generate and plot the merged product. - discharge_comparison.m: Script used to compare the runoff with discharge observations. - The merging of the GloGEMflow results and the ISIMIP results is done offline. The data of ISIMIP is read in into the processing scripts in which they are merged with GloGEMflow.