Geoscience Reference
In-Depth Information
Negative ice thickness
−150
BB−7
BB−8
BB−2
BB−3
−200
−250
BB−6
BB−4
BB−5
−300
160
170
180
190
200
210
220
230
240
250
260
Day of 1975
Plate 17
Ice bottom elevation relative to the upper surface from ablation measurements made by
A.Hanson during the 1975 AIDJEX project inthewestern Arctic(Adapted from Notzet al. 2003.
Withpermission American Geophysical Union) (see also in black-and-white on page 120)
Ice bottom elevation relative to day 190
0
−10
BB−2
BB−3
BB−7
BB−8
−20
−30
−40
190
195
200
205
210
215
220
225
1/2
u
*0
=
τ
z
0
= 0.006
z
0
= 0.06
0.015
0.01
0.005
0
190
195
200
205
210
215
220
225
Day of 1975
Plate 18
Upper panel: bottom elevation of “false bottom” thickness gauges relative to their read-
ings on day 190. Box marks the ten-day period chosen for simulation. Bottom panel: Interface
frictionvelocitydetermined from icedrift relative togeostrophic current, for twovalues of surface
roughness spanning range of estimates for AIDJEX station Big Bear (Adapted from Notz et al.
2003. Withpermission American Geophysical Union) (see also inblack-and-white on page 122)
