(Table 1) Two-way travel times and depths of picked internal reflection horizons (IRHs) of the NGRIP ice core ...

• Main Authors: Steinhage, Daniel, Eisen, Olaf, Clausen, Henrik Brink
• Format: Dataset
• Language: English
• Published: PANGAEA 2005
• Subjects: Horizon; Two-way traveltime; DEPTH, ice/snow; Age; Age, relative, number of years; Ice drill; NGRIP; Sampling/drilling ice; Glaciology @ AWI AWI_Glac; North Greenland Ice Core Project NGRIP; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarc*; Antarctic; Greenland; Greenland ice core; Greenland Ice core Project; ice core; Ice Sheet; North Greenland; North Greenland Ice Core Project; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.855197; https://doi.pangaea.de/10.1594/PANGAEA.855197

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 ... : 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 ...