Size distributions of small ice pieces calved from icebergs

Citation
Sb. Savage et al., Size distributions of small ice pieces calved from icebergs, COLD REG SC, 31(2), 2000, pp. 163-172
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Civil Engineering
Journal title
COLD REGIONS SCIENCE AND TECHNOLOGY
ISSN journal
0165-232X → ACNP
Volume
31
Issue
2
Year of publication
2000
Pages
163 - 172
Database
ISI
SICI code
0165-232X(200007)31:2<163:SDOSIP>2.0.ZU;2-1
Abstract
This study was part of a larger project currently underway to develop an op erational iceberg drift and deterioration model for the Canadian Ice Servic e (CIS), Environment Canada. This new iceberg model, as distinct from previ ous drift computations, will include estimates of iceberg calving and produ ction of smaller ice pieces in the bergy bit and growler size ranges. These smaller size pieces can cause large forces upon impact with offshore struc tures. It is important to have information about the probability of encount ering these small ice pieces in the neighborhood of the parent iceberg. Calving can result from wave-induced erosion at the waterline of a floating iceberg. When the waterline notch caused by wave erosion reaches a critica l size, the weight of the overhanging slab will be large enough to cause it to break off and fracture into many thousands of small ice pieces. The foc us of the present paper is on the size-frequency distribution function for the ice pieces that are generated. The correlations presented are based pri marily on the field observations of calving by Crocker [Crocker, G.B., 1993 , Size distributions of bergy bits and growlers calved from deteriorating i cebergs. Cold Reg. Sci. Technol., 22, 113-119.]. The initial size distribut ion of the calved pieces forms an essential starting point for the subseque nt analyses of small ice piece deterioration and drift that are embodied in the operational model. (C) 2000 Elsevier Science B.V. All rights reserved.