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Glacier Inventory of the South Patagonian Icefield

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posted on 19.12.2013, 10:39 by Hernán De AngelisHernán De Angelis

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REFERENCE

This set of ShapeFile vector files contains the glacier inventory used and published in the paper:

De Angelis. H. 2014. Hypsometry and sensitivity of the mass balance to changes in equilibrium line altitude: the case of the South Patagonian Icefield. Journal of Glaciology 219(60), 14-28.

The inventory was compiled by visual interpretation of cloud-free Landsat 5 TM imagery acquired on 2001-03-12. The interpretation was made with the aid of a shaded relief model (16x vertical exaggeration) and artificially computed ''water drainage flow lines'', both derived from Shuttle Radar Topography Mission (SRTM) data. See the paper for more details.

The inventory is also part of the Randolph glacier inventory:

Arendt, A., T. Bolch, J.G. Cogley, A. Gardner, J.-O. Hagen, R. Hock, G. Kaser, W.T. Pfeffer, G. Moholdt, F. Paul, V. Radić, L. Andreassen, S. Bajracharya, M. Beedle, E. Berthier, R. Bhambri, A. Bliss, I. Brown, E. Burgess, D. Burgess, F. Cawkwell, T. Chinn, L. Copland, B. Davies, \textbf{H. De Angelis}, E. Dolgova, K. Filbert, R. Forester, A. Fountain, H. Frey, B. Giffen, N. Glasser, S. Gurney, W. Hagg, D. Hall, U.K. Haritashya, G. Hartmann, C. Helm, S. Herreid, I. Howat, G. Kapustin, T. Khromova, C. Kienholz, M. Koenig, J. Kohler, D. Kriegel, S. Kutuzov, I. Lavrentiev, R. LeBris, J. Lund, W. Manley, C. Mayer, E. Miles, X. Li, B. Menounos, A. Mercer, N. Moelg, P. Mool, G. Nosenko, A. Negrete, C. Nuth, R. Pettersson, A. Racoviteanu, R. Ranzi, P. Rastner, F. Rau, J. Rich, H. Rott, C. Schneider, Y. Seliverstov, M. Sharp, O. Sigurðsson, C. Stokes, R. Wheate, S. Winsvold, G. Wolken, F. Wyatt, N. Zheltyhina. 2012, Randolph Glacier Inventory [v2.0]: A Dataset of Global Glacier Outlines. Global Land Ice Measurements from Space, Boulder Colorado, USA. Digital Media.

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GEOGRAPHIC PROJECTION

Universal Transverse Mercator zone 18F South referred to the WGS84 ellipsoid.

PROJCS["WGS 84 / UTM zone 18S",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-75],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",10000000],AUTHORITY["EPSG","32718"],AXIS["Easting",EAST],AXIS["Northing",NORTH]]

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DESCRIPTION OF DATA COLUMNS

The columns in the database should be self-explanatory, but are given here for clarity:

NAME glacier name, unnamed glaciers referred to as "UN"
CENTER_LON geographical longitude of centroid
CENTER_LAT geographical latitude of centroid
CENTER_X x coordinate in meters (UTM18S,WGS84)
CENTER_Y y coordinate in meters (UTM18S,WGS84)
AREA_KM2 glacier area (km2)
AREA_ERROR error in glacier area (km2)
HMAX_M maximum elevation (m), as derived from SRTM
HMIN_M minimum elevation (m), as derived from SRTM
HAVG_M average elevation (m), as derived from SRTM
HMEDIAN_M median elevation (m), as derived from SRTM
HMODE_M mode of elevation (m), as derived from SRTM
SNLE_M elevation (m) of average snowline (closely corresponding to equilibrium line) [see paper for derivation]
SNLE_ERROR error in elevation (m) of average snowline (closely corresponding to equilibrium line) [see paper for derivation]
AAR accumulation area ratio
AAR_ERROR error in AAR
SLOPE_ELA glacier slope (degrees) at ELA
SLOPE_AVG average glacier slope (degrees)

 

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