(Table 1) Two-way travel times and depths of picked internal reflection horizons (IRHs) of the NGRIP ice core
During the summer of 2003, a ground-penetrating radar survey around the North Greenland Icecore Project (NorthGRIP) deep ice-core drilling site (75°06' N, 42°20' W; 2957 m a.s.l.) was carried out using a shielded 250 MHz radar system. The drill site is located on an ice divide, roughly 300...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.855197 2024-09-15T17:39:56+00:00 (Table 1) Two-way travel times and depths of picked internal reflection horizons (IRHs) of the NGRIP ice core Steinhage, Daniel Eisen, Olaf Clausen, Henrik Brink LATITUDE: 75.100000 * LONGITUDE: -42.320000 * DATE/TIME START: 1996-07-01T00:00:00 * DATE/TIME END: 1996-07-01T00:00:00 * MINIMUM DEPTH, ice/snow: 16.5 m * MAXIMUM DEPTH, ice/snow: 99.5 m 2005 text/tab-separated-values, 28 data points https://doi.pangaea.de/10.1594/PANGAEA.855197 https://doi.org/10.1594/PANGAEA.855197 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.855197 https://doi.org/10.1594/PANGAEA.855197 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Steinhage, Daniel; Eisen, Olaf; Clausen, Henrik Brink (2005): Regional and temporal variation of accumulation around NorthGRIP derived from ground-penetrating radar. Annals of Glaciology, 42(1), 326-330, https://doi.org/10.3189/172756405781812574 Age relative number of years AWI_Glac DEPTH ice/snow Glaciology @ AWI Greenland Horizon ICEDRILL Ice drill NGRIP North Greenland Ice Core Project NorthGRIP Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sampling/drilling ice SPP1158 Two-way traveltime dataset 2005 ftpangaea https://doi.org/10.1594/PANGAEA.85519710.3189/172756405781812574 2024-07-24T02:31:33Z During the summer of 2003, a ground-penetrating radar survey around the North Greenland Icecore Project (NorthGRIP) deep ice-core drilling site (75°06' N, 42°20' W; 2957 m a.s.l.) was carried out using a shielded 250 MHz radar system. The drill site is located on an ice divide, roughly 300 km north-northwest of the summit of the Greenland ice sheet. More than 430 km of profiles were measured, covering a 10 km by 10 km area, with a grid centered on the drilling location, and eight profiles extending beyond this grid. Seven internal horizons within the upper 120 m of the ice sheet were continuously tracked, containing the last 400 years of accumulation history. Based on the age-depth and density-depth distribution of the deep core, the internal layers have been dated and the regional and temporal distribution of accumulation rate in the vicinity of NorthGRIP has been derived. The distribution of accumulation shows a relatively smoothly increasing trend from east to west from 145 kg/m**2/a to 200 kg/m**2/a over a distance of 50 km across the ice divide. The general trend is overlain by small-scale variations on the order of 2.5 kg/m**2/a/km, i.e. around 1.5% of the accumulation mean. The temporal variations of the seven periods defined by the seven tracked isochrones are on the order of +-4% of the mean of the last 400 years, i.e. at NorthGRIP ±7 kg/m**2/a. If the regional accumulation pattern has been stable for the last several thousand years during the Holocene, and ice flow has been comparable to today, advective effects along the particle trajectory upstream of NorthGRIP do not have a significant effect on the interpretation of climatically induced changes in accumulation rates derived from the deep ice core over the last 10 kyr. Dataset Annals of Glaciology Antarc* Antarctic Greenland Greenland ice core Greenland Ice core Project ice core Ice Sheet NGRIP North Greenland North Greenland Ice Core Project Sea ice PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-42.320000,-42.320000,75.100000,75.100000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Age relative number of years AWI_Glac DEPTH ice/snow Glaciology @ AWI Greenland Horizon ICEDRILL Ice drill NGRIP North Greenland Ice Core Project NorthGRIP Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sampling/drilling ice SPP1158 Two-way traveltime |
spellingShingle |
Age relative number of years AWI_Glac DEPTH ice/snow Glaciology @ AWI Greenland Horizon ICEDRILL Ice drill NGRIP North Greenland Ice Core Project NorthGRIP Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sampling/drilling ice SPP1158 Two-way traveltime Steinhage, Daniel Eisen, Olaf Clausen, Henrik Brink (Table 1) Two-way travel times and depths of picked internal reflection horizons (IRHs) of the NGRIP ice core |
topic_facet |
Age relative number of years AWI_Glac DEPTH ice/snow Glaciology @ AWI Greenland Horizon ICEDRILL Ice drill NGRIP North Greenland Ice Core Project NorthGRIP Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sampling/drilling ice SPP1158 Two-way traveltime |
description |
During the summer of 2003, a ground-penetrating radar survey around the North Greenland Icecore Project (NorthGRIP) deep ice-core drilling site (75°06' N, 42°20' W; 2957 m a.s.l.) was carried out using a shielded 250 MHz radar system. The drill site is located on an ice divide, roughly 300 km north-northwest of the summit of the Greenland ice sheet. More than 430 km of profiles were measured, covering a 10 km by 10 km area, with a grid centered on the drilling location, and eight profiles extending beyond this grid. Seven internal horizons within the upper 120 m of the ice sheet were continuously tracked, containing the last 400 years of accumulation history. Based on the age-depth and density-depth distribution of the deep core, the internal layers have been dated and the regional and temporal distribution of accumulation rate in the vicinity of NorthGRIP has been derived. The distribution of accumulation shows a relatively smoothly increasing trend from east to west from 145 kg/m**2/a to 200 kg/m**2/a over a distance of 50 km across the ice divide. The general trend is overlain by small-scale variations on the order of 2.5 kg/m**2/a/km, i.e. around 1.5% of the accumulation mean. The temporal variations of the seven periods defined by the seven tracked isochrones are on the order of +-4% of the mean of the last 400 years, i.e. at NorthGRIP ±7 kg/m**2/a. If the regional accumulation pattern has been stable for the last several thousand years during the Holocene, and ice flow has been comparable to today, advective effects along the particle trajectory upstream of NorthGRIP do not have a significant effect on the interpretation of climatically induced changes in accumulation rates derived from the deep ice core over the last 10 kyr. |
format |
Dataset |
author |
Steinhage, Daniel Eisen, Olaf Clausen, Henrik Brink |
author_facet |
Steinhage, Daniel Eisen, Olaf Clausen, Henrik Brink |
author_sort |
Steinhage, Daniel |
title |
(Table 1) Two-way travel times and depths of picked internal reflection horizons (IRHs) of the NGRIP ice core |
title_short |
(Table 1) Two-way travel times and depths of picked internal reflection horizons (IRHs) of the NGRIP ice core |
title_full |
(Table 1) Two-way travel times and depths of picked internal reflection horizons (IRHs) of the NGRIP ice core |
title_fullStr |
(Table 1) Two-way travel times and depths of picked internal reflection horizons (IRHs) of the NGRIP ice core |
title_full_unstemmed |
(Table 1) Two-way travel times and depths of picked internal reflection horizons (IRHs) of the NGRIP ice core |
title_sort |
(table 1) two-way travel times and depths of picked internal reflection horizons (irhs) of the ngrip ice core |
publisher |
PANGAEA |
publishDate |
2005 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.855197 https://doi.org/10.1594/PANGAEA.855197 |
op_coverage |
LATITUDE: 75.100000 * LONGITUDE: -42.320000 * DATE/TIME START: 1996-07-01T00:00:00 * DATE/TIME END: 1996-07-01T00:00:00 * MINIMUM DEPTH, ice/snow: 16.5 m * MAXIMUM DEPTH, ice/snow: 99.5 m |
long_lat |
ENVELOPE(-42.320000,-42.320000,75.100000,75.100000) |
genre |
Annals of Glaciology Antarc* Antarctic Greenland Greenland ice core Greenland Ice core Project ice core Ice Sheet NGRIP North Greenland North Greenland Ice Core Project Sea ice |
genre_facet |
Annals of Glaciology Antarc* Antarctic Greenland Greenland ice core Greenland Ice core Project ice core Ice Sheet NGRIP North Greenland North Greenland Ice Core Project Sea ice |
op_source |
Supplement to: Steinhage, Daniel; Eisen, Olaf; Clausen, Henrik Brink (2005): Regional and temporal variation of accumulation around NorthGRIP derived from ground-penetrating radar. Annals of Glaciology, 42(1), 326-330, https://doi.org/10.3189/172756405781812574 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.855197 https://doi.org/10.1594/PANGAEA.855197 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.85519710.3189/172756405781812574 |
_version_ |
1810483543501963264 |