Document 3 
Accession No.: 3950973. 
Author:        Martin-S.  Drucker-R. 
Author Affil.: Sch. of Oceanogr., Washington Univ., Seattle, WA, USA. 
Title:         Observations of short-period ice floe accelerations during Leg
               II of the Polarbjorn drift. 
Source:        Journal of Geophysical Research.  vol.96, no.C6.  pp. 10567-80.
                15 June 1991. 
References:    16 refs. 
ISSN:          0148-0227. 
CODEN:         JGREA2. 
Language:      eng. 
Year:          1991. 
Pub. Type:     journal-article (J). 
Treatment:     EXPERIMENTAL (X). 
Report No.:    CCCC: 0148-0227/91/91JC-00785$05.00. 
Pub. Country:  USA. 
Class. Code:   A9210R.  A9330L. 
Subject:       oceanographic-regions.  sea-ice. 
Identifiers:   sea ice motion.  ocean.  Arctic Ocean.  AD 1988.  short-period
               ice floe accelerations.  Leg II.  Polarbjorn drift.  orthogonal
               components. acceleration.  deformation.  fracture.  shear. 
               ridging.  collisions. 
Abstract:      During leg II of the Polarbjorn drift, the orthogonal
               components of acceleration were measured in the vertical and
               horizontal directions for the frequency interval 0.04-5 Hz, and
               the compass heading, at three sites adjacent to the ship. 
               During days 310-329 in 1988 the ice surrounding the ship
               underwent a transition from large floes with scales of 1-10 km,
               to small, broken floes with scales of 10-100 m. The deformation
               and fracture associated with this transition generated
               significant accelerations which were associated with ice shear,
               ridging, and ice floe collisions.