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 (.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