Ice Thickness Distribution.

• Main Authors: Untersteiner, Norbert, Moritz, Richard E.
• Other Authors: WASHINGTON UNIV SEATTLE POLAR SCIENCE CENTER
• Format: Text
• Language: English
• Published: 1989
• Subjects: Physical and Dynamic Oceanography; Snow; Ice and Permafrost; Acoustic Detection and Detectors; *SONAR; *SEA ICE; *UNDERSEA SURVEILLANCE; THICKNESS; DISTRIBUTION; TIME SERIES ANALYSIS; PROTOTYPES; ARCTIC REGIONS; MOORING; OCEANOGRAPHIC EQUIPMENT; ULS(UPWARD LOOKING SONAR); Arctic; Ice; permafrost; Sea ice
• Online Access: http://www.dtic.mil/docs/citations/ADA298898; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA298898

Prototype Upward Looking Sonar (ULS) instruments that monitor time series of ice draft from oceanographic moorings have been designed, built, tested and deployed in arctic waters. The measured time series recovered from these instruments reveal many geophysically significant, quantitative aspects of the sea ice draft distribution that have not been measured or documented previously. The utility of the basic concept, and the soundness of the ULS Mark-1 design are confirmed by the data. Tests in the laboratory and in the field suggest opportunities for modest design changes that would improve the performance of the ULS. Proposed further work includes implementation of design modifications, detailed analysis of the ULS time series, redeployment of the prototype units, and construction and deployment of three new ULS units