Anchor in stratified ice facies

Potentiometer + spool iCS-Cibt

Figure 66.1 Instrument used to record ice displacement. The steel support is ca. 50cm high.

Figure 66.2 Results for site 1: (a) ice velocity for anchor P3; (b) air temperature. Gaps in the record occur after each complete turn of the potentiometer, when the resistance returns to zero.

September 2002

Figure 66.2 Results for site 1: (a) ice velocity for anchor P3; (b) air temperature. Gaps in the record occur after each complete turn of the potentiometer, when the resistance returns to zero.

Table 66.1 Summary of anchor positions and the data recorded

Location

Description

Height* (cm)

Mean velocity

(ice thickness)

(mm day-1)

Site 1 (ca. 5m) P1: Sediments near support 0 0.0

P2: Stratified ice facies 100 —t

P3: Dispersed ice facies 150 92.1

Site 2 (ca. 15 m) P1: Sediments near support 0 0.0

P2: Stratified ice facies 3 53.9

P3: Dispersed ice facies 60 117.5

Site 1 (ca. 5m) P1: Sediments near support 0 0.0

P2: Stratified ice facies 100 —t

P3: Dispersed ice facies 150 92.1

Site 2 (ca. 15 m) P1: Sediments near support 0 0.0

P2: Stratified ice facies 3 53.9

P3: Dispersed ice facies 60 117.5

*The height above the debris next to the ice; not the height above the bed.

tThe wire attached to anchor P2 at site 1 was disturbed by debris falling out of the contact between the two ice facies.

(a)

P3

P2

(b)

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