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contributor authorVisbeck, Martin
contributor authorFischer, Jorgen
date accessioned2017-06-09T13:58:23Z
date available2017-06-09T13:58:23Z
date copyright1995/02/01
date issued1994
identifier issn0739-0572
identifier otherams-1013.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4145213
description abstractSurface data obtained from 153-kHz acoustic Doppler current profilers deployed in the Greenland Sea at about 350-m depth during the winter of 1988/89 were investigated under several aspects. First a method is described to improve the instrument depth measurements using the binned backscattered energy profile near the surface. The accuracy of the depth estimates is found to be significantly better than 0.5 m. Further, improvements of wind speed estimates were found by using the ambient noise in the 150-kHz band in favor of the surface backscattered energy as suggested by Schott. Limitations of the ambient sound method at low wind speeds are presented when thermal noise overwhelms the wind-induced noise. Finally, a method to detect the presence of sea ice above the ADCP is presented by cross correlating the surface backscatter strength and the magnitudes of all Doppler velocity components. The resulting time series of ice concentration are in overall good agreement with Special Sensor Microwave/Imager estimates but allow for higher temporal resolution. Further, in the vicinity of the ice edge, enhanced high-frequency ambient noise in the 150-kHz band was observed.
publisherAmerican Meteorological Society
titleSea Surface Conditions Remotely Sensed by Upward-Looking ADCPs
typeJournal Paper
journal volume12
journal issue1
journal titleJournal of Atmospheric and Oceanic Technology
identifier doi10.1175/1520-0426(1995)012<0141:SSCRSB>2.0.CO;2
journal fristpage141
journal lastpage149
treeJournal of Atmospheric and Oceanic Technology:;1994:;volume( 012 ):;issue: 001
contenttypeFulltext


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