Measuring sea ice draft and coverage with moored upward looking sonars


Contact
vhstrass [ at ] awi-bremerhaven.de

Abstract

Abstract: Presented is a method to derive data of ice draft and coverage from acoustic measurements madewith moored Upward Looking Sonars (ULSs), sounding the sea surface remotely from below. The method hasbeen developed on the basis of two-year long time series obtained from four locations in the Weddell Sea. Ittakes into account the variations of sound speed and density which occur between the target and the instrument,the variations of the surface air pressure, and a possible bias of the mean ice draft within the ensonified windowwhich results as the combined effect of beam spreading and skewed ice distributions; ice and open water arediscriminated making use of their specific echo amplitude signatures. The residual total error in the determinedmean ice draft is estimated as 4 cm, compared to an initial error of almost 90 cm in the original uncorrecteddata. Suggestions for further improvement of the instruments are made at the end of the paper.



Item Type
Article
Authors
Divisions
Programs
Publication Status
Published
Eprint ID
3052
Cite as
Strass, V. (1998): Measuring sea ice draft and coverage with moored upward looking sonars , Deep-Sea Research I, 45 , pp. 795-818 .


Share
Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email

Research Platforms

Campaigns
ANT > IX > 2
ANT > X > 7


Actions
Edit Item Edit Item