COLLECTION NAME:
Rare and Distinctive Collections Moving Image Film and Video
Record
Collection Name:
Rare and Distinctive Collections Moving Image Film and Video
Title:
North American Ice Sheet
Name:
Budd, W. F. (William Francis)
Name Role Term Text:
Producer
Name:
Smith, Ian
Name Role Term Text:
Producer
Name:
McInness, Barry
Name Role Term Text:
Programming Assistance
Name:
Lamb, Peter
Name Role Term Text:
Programming Assistance
Name:
Gardner, David
Name Role Term Text:
Pohotographer
Resource Type:
Moving image
Genre:
Science films
Genre:
silent films
Place Created:
Melbourne (Vic.)
Date Created:
circa 1979
Publisher:
Department of Meteorology, University of Melbourne
Language Term:
English
Extent:
1 film reel (5min., 21sec.)
Form:
color film (film, material)
Form:
16mm (photographic film size)
Abstract:
Producer, WF Budd and Ian Smith, Department of Meteorology, University of Melbourne. Programming assistance, Barry McInness, Peter Lamb. Photographer, David Gardner. Text on screen, "Numerical modelling of growth and retreat of the North American ice sheet in response to the Earth's orbital radiation changes from 120,000 years before present." Graphics include mathematical formulas for parameters of the simulation, with animated map of ice sheet.
Note:
Collection of origin: Roger G. Barry Glaciology Collection
Note:
00:00:00 North American Ice Sheet. 00:00:16 by Professor W F Budd and Ian Smith Department of Meteorology University of Melbourne. 00:00:22 Numerical Modeling of growth and retreat of the North American ice sheet in response to the earth's orbital radiation changes from 120,000 years before present. 00:00:35 Parameters used in the Simulation: 1 Radiation-Elevation-Temperature factor. r+36 m/ly/day which gives a maximum lowering of the elevation-ablation relation at 65N of 610m (or about 4 degrees Celsius change) at 26,000 years before present. 00:00:55 2 Ice Sheet Feedback f=1.25 which gives a maximum additional lowering of the elevation-ablation relation of 400m (or about 2.6 degrees Celsius change). 00:01:11 3 Precipitation P=D subscript 2 + 0.2 which is based on the present precipitation distribution plus an increase of .2m/year everywhere. 01:28 4 Ice Flow Parameter. k=0.1 which is equivalent to a flow law for basal shear of temperate ice. 00:01:39 Initial elevation data. 00:01:42 Image of Canada, Alaska, and Greenland. 00:01:59 North American Ice Sheet - Advance and Retreat infographic. 00:04:38 Programming assistance Barry McInnes Department of Meteorology; Peter Lamb Computer Science Department. Photography David Gardner Centre for the Study of Higher Education. 00:04:45 Computers used are from the Computer Centre and the Computer Science Department. Graphics provided by the Computer Science Department. 00:04:44 University of Melbourne Copyright 1980 All rights reserved. 00:05:21 End of recording.
Note Type:
Segment sequence
Subject Topic:
Equations
Subject Topic:
Ice sheets
Subject Geographic:
North America
Identifier:
U183050938740_narv_barryRoger_67.2-A_northAmericanIceSheet_a.mp4
Internet Media Type:
video/mp4
Digital Origin:
reformatted digital
Access Condition:
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