Sökning: onr:"swepub:oai:DiVA.org:uu-210758" >
A new semi-automati...
A new semi-automatic approach for dividing glacier complexes into individual glaciers
-
Kienholz, Christian (författare)
-
- Hock, Regine (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära
-
Arendt, Anthony A. (författare)
-
(creator_code:org_t)
- 2013
- 2013
- Engelska.
-
Ingår i: Journal of Glaciology. - 0022-1430 .- 1727-5652. ; 59:217, s. 925-937
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.3...
-
visa färre...
Abstract
Ämnesord
Stäng
- Many glaciological and hydrological studies require outlines of individual glaciers rather than total ice cover. Here we develop a new semi-automatic algorithm that uses a digital elevation model (DEM) and outlines of glacier complexes to calculate the extents of individual glaciers. The algorithm first applies hydrological modeling tools to a modified DEM to calculate flowsheds. It then merges flowsheds that belong to individual glaciers using a distance-based approach, whose required empirical parameters are derived from the Juneau Icefield area in Alaska. In this region, 2% of similar to 1300 glaciers were misclassified. The algorithm was validated on >25 000 km(2) of ice in other regions in Alaska and on >40 000 km(2) of ice in Arctic Canada, resulting in similar to 2% and similar to 3% misclassified glaciers, respectively. Results indicate that the algorithm is robust provided the DEM and the outlines are of good quality.
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas