The Randolph Glacier Inventory: a globally complete inventory of glaciers

TitleThe Randolph Glacier Inventory: a globally complete inventory of glaciers
Publication TypeJournal Article
Year of Publication2014
AuthorsPfeffer WT, Arendt AA, Bliss A., Bolch T, Cogley JG, Gardner AS, Hagen JO, Hock R, Kaser G, Kienholz C., Miles E.S, Moholdt G, Molg N., Paul F, Radic V., Rastner P., Raup B.H, Rich J., Sharp MJ, Randolph C
JournalJournal of Glaciology
Volume60
Pagination537-552
Date Published2014/06
Type of ArticleArticle
ISBN Number0022-1430
Accession NumberWOS:000339140300012
Keywordsalaskan glaciers; Antarctic glaciology; Arctic glaciology; glacier; glacier delineation; ice caps; landsat; mapping; mass-balance; mountain glaciers; project; Remote sensing; sea-level rise; tropical glaciology; volume
Abstract

The Randolph Glacier Inventory (RGI) is a globally complete collection of digital outlines of glaciers, excluding the ice sheets, developed to meet the needs of the Fifth Assessment of the Intergovernmental Panel on Climate Change for estimates of past and future mass balance. The RGI was created with limited resources in a short period. Priority was given to completeness of coverage, but a limited, uniform set of attributes is attached to each of the similar to 198 000 glaciers in its latest version, 3.2. Satellite imagery from 1999-2010 provided most of the outlines. Their total extent is estimated as 726 800 +/- 34 000 km(2). The uncertainty, about +/- 5%, is derived from careful single-glacier and basin-scale uncertainty estimates and comparisons with inventories that were not sources for the RGI. The main contributors to uncertainty are probably misinterpretation of seasonal snow cover and debris cover. These errors appear not to be normally distributed, and quantifying them reliably is an unsolved problem. Combined with digital elevation models, the RGI glacier outlines yield hypsometries that can be combined with atmospheric data or model outputs for analysis of the impacts of climatic change on glaciers. The RGI has already proved its value in the generation of significantly improved aggregate estimates of glacier mass changes and total volume, and thus actual and potential contributions to sea-level rise.

DOI10.3189/2014JoG13J176
Short TitleJ. Glaciol.
Student Publication: 
No