Supplementary data: Impact of a global temperature rise of 1.5 degrees Celsius on Asia's glaciers

Supplementary data to Kraaijenbrink, Bierkens, Lutz and Immerzeel, 2017. Impact of a global temperature rise of 1.5 degrees Celsius on Asia’s glaciers, Nature. Model code can be found here.

Please note that all data is provided in 7z-archives. To extract the data use the open source software 7zip.

Model input: Raster data

The raster data that is required to run the model is available for the entire High Mountain Asia (complete-hma.7z) and for each RGI v5.0 sub-region (<region-name>.7z). The 7z-archives hold separate folders for each glacier, which are named by RGI glacier ID. The rasters for each glacier are in GeoTIFF format, have a 30 m resolution, are in local UTM projection (WGS84 datum), and are clipped to the RGI glacier extent.

Rasters present for each glacier are:

classification.tif         The debris classification made in google earth engine.
debris-thickness-50cm.tif  Debris thickness estimation based on Landsat 8 surface temperature.
ice-thickness.tif          Ice thickness determined using the Glabtop2 model
ls8-composite-b456.tif     Landsat 8 warmest-pixel optical composite (bands RED, NIR, SWIR1)
ls8-composite-tsurf.tif    Landsat 8 warmest-pixel surface temperature composite
srtm-elevation.tif         SRTM 1 arc second elevation data
srtm-slope.tif             Slope of the SRTM 1 arc second data

Model input: RDS data

The general model input data (mbg-model-rds-data.7z) is stored in R’s binary RDS format and R is required to open and read the data.

Files present in the 7z-archive are:

dP_factors_2006-2100.rds   Precipitation changes (delta factors) up to 2100
dT_degrees_2006-2100.rds   Temperature changes (Kelvin) up to 2100
glacier-data.rds           Glacier centroids with current climate and mass balance input
ostrem_meancurve.rds       The Östrem curve used by the model
rgi-subregions.rds         RGI sub-region polygons for Asia

Output data

Region-aggregated output is available in ESRI Shapefile format for the RGI sub-regions, major river basins, and for a 1×1 degree grid (output-shapefiles.7z). The attribute tables of all shapefiles hold data on the occurrence of debris as well as current glacier area and volume, and volume projections for the end of century.

The available shapefile attributes are:

count		number of glaciers
a_total		total glacier area (m2)
a_debris  	glacier area covered by debris (m2)
a_ela     	glacier area below modelled ELA (m2)
a_ela_deb 	glacier area below modelled ELA covered by debris (m2)
v_total   	total glacier volume (m3)
v_debris  	glacier volume covered by debris (m3)
v_ela     	glacier volume below modelled ELA (m3)
v_ela_deb 	glacier volume below modelled ELA covered by debris (m3)
m_total_gt	total glacier mass (gigaton)
volST_EOC 	volume remaining in end of century under a stable current temperature
vol15_EOC 	volume remaining in end of century under 1.5 degree scenario
vol26_EOC 	volume remaining in end of century for the RCP2.6 model ensemble
vol45_EOC 	volume remaining in end of century for the RCP4.5 model ensemble
vol60_EOC 	volume remaining in end of century for the RCP6.0 model ensemble
vol85_EOC	volume remaining in end of century for the RCP8.5 model ensemble