ID-425 : Geothermal heat flux distribution for the Greenland ice sheet, derived by combining a global representation and information from deep ice cores
Type
MODEL
Title
Geothermal heat flux distribution for the Greenland ice sheet, derived by combining a global representation and information from deep ice cores
Abstract
We present a distribution of the geothermal heat flux (GHF) for Greenland, which is an update of two earlier versions by Greve (2005, Ann. Glaciol. 42) and Greve and Herzfeld (2013, Ann. Glaciol. 54). The GHF distribution is constructed in two steps. First, the global representation by Pollack et al. (1993, Rev. Geophys. 31) is scaled for the area of Greenland. Second, by means of a paleoclimatic simulation carried out with the ice sheet model SICOPOLIS, the GHF values for five deep ice core locations are modified such that observed and simulated basal temperatures match closely. The resulting GHF distribution generally features low values in the south and the north-west, whereas elevated values prevail in central North Greenland and towards the north-east.
Computing Environment
Rironnet
(cluster of Linux workstations operated by the Glacier and Ice Sheet Research Group, ILTS, Hokkaido University)
Principal Investigator
Ralf Greve
Institute of Low Temperature Science (ILTS), Hokkaido University
greve@lowtem.hokudai.ac.jp
ArCS Theme
JSPS KAKENHI Grant Number
JP16H02224, JP17H06104
Data Information
Model Name
SICOPOLIS
Abstract (Brief description of the experiment contents (initial conditions, boundary conditions, etc.))
Distribution of the geothermal heat flux under the Greenland ice sheet, derived by combining the global heat-flow representation by Pollack and others (1993, Rev. Geophys. 31, doi: 10.1029/93RG01249) and point information at five deep ice-core locations (GRIP, Dye 3, Camp Century, NGRIP, NEEM). Update of two earlier versions by Greve (2005, Ann. Glaciol. 42, doi: 10.3189/172756405781812510) and Greve and Herzfeld (2013, Ann. Glaciol. 54, doi: 10.3189/2013AoG63A085). Gridded NetCDF files are available for two different grids (EPSG:3413 grid: polar stereographic projection, standard parallel 70N, central meridian 45W; Bamber grid: polar stereographic projection, standard parallel 71N, central meridian 39W) and three different resolutions (5 km, 10 km, 20 km).
Temporal Extent
| Begin Date | 1990-01-01 |
| End Date | 2018-12-31 |
| Temporal Characteristics | Mean for the entire interval |
Geographic Bounding Box
| North bound latitude | 84.0 |
| West bound longitude | -74.0 |
| Eastbound longitude | -12.0 |
| South bound latitude | 59.0 |
GridDimension Name Dimension Size (slice number of the dimension) Resolution Unit row 337 5 km (polar stereographic projection x-coordinate) column 577 5 km (polar stereographic projection y-coordinate) vertical 1
| Dimension Name | Dimension Size (slice number of the dimension) | Resolution Unit |
|---|---|---|
| row | 337 | 5 km (polar stereographic projection x-coordinate) |
| column | 577 | 5 km (polar stereographic projection y-coordinate) |
| vertical | 1 |
Data Information
Related URL
Article (the article written using this data)
Greve, R. 2019. Geothermal heat flux distribution for the Greenland ice sheet, derived by combining a global representation and information from deep ice cores. Polar Data Journal, 3, 22-36, doi: 10.20575/00000006.
Personnel
| Roll | Contact Person | Name | Ralf Greve | Affiliation | Institute of Low Temperature Science (ILTS), Hokkaido University | Country | Japan | greve@lowtem.hokudai.ac.jp |
|---|
Data Registration
01:34 on Thu March 26, 2020
Last Update
01:34 on Thu March 26, 2020