Estimating sea-ice coverage, draft, and velocity in Marguerite Bay (Antarctica) using a subsurface moored upward-looking acoustic Doppler current profiler (ADCP)
Beardsley, Robert C.
Owens, W. Brechner
MetadataShow full item record
A technique for the analysis of data from a subsurface moored upward-looking acoustic Doppler current profiler (ADCP) to determine ice coverage, draft and velocity is presented and applied to data collected in Marguerite Bay on the western Antarctic Peninsula shelf. This method provides sea ice information when no dedicated upward-looking sonar (ULS) data is available. Ice detection is accomplished using windowed variances of ADCP vertical velocity, vertical error velocity, and surface horizontal speed. ADCP signal correlation and backscatter intensity were poor indicators of the presence of ice at this site. Ice draft is estimated using a combination of ADCP backscatter data, atmospheric and oceanic pressure data, and information about the thermal stratification. This estimate requires corrections to the ADCP-derived range for instrument tilt and sound speed profile. Uncertainties of ± 0.20 m during midwinter and ± 0.40 m when the base of the surface mixed layer is above the ADCP for ice draft are estimated based on (a) a Monte Carlo simulation, (b) uncertainty in the sound speed correction, and (c) performance of the zero-draft estimate during times of known open water. Ice velocity is taken as the ADCP horizontal velocity in the depth bin specified by the range estimate.
Author Posting. © Elsevier B.V., 2007. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Deep Sea Research Part II: Topical Studies in Oceanography 55 (2008): 351-364, doi:10.1016/j.dsr2.2007.11.004.
Showing items related by title, author, creator and subject.
Draft genome sequence of marine alphaproteobacterial strain HIMB11, the first cultivated representative of a unique lineage within the Roseobacter clade possessing an unusually small genome Durham, Bryndan P.; Grote, Jana; Whittaker, Kerry A.; Bender, Sara J.; Luo, Haiwei; Grim, Sharon L.; Brown, Julia; Casey, John F.; Dron, Antony; Florez-Leiva, Lennis; Krupke, Andreas; Luria, Catherine M.; Mine, Aric; Nigro, Olivia D.; Pather, Santhiska; Talarmin, Agathe; Wear, Emma; Weber, Thomas; Wilson, Jesse; Church, Matthew J.; DeLong, Edward F.; Karl, David M.; Steward, Grieg F.; Eppley, John; Kyrpides, Nikos C.; Schuster, Stephan; Rappe, Michael S. (Genomic Standards Consortium, 2014)Strain HIMB11 is a planktonic marine bacterium isolated from coastal seawater in Kaneohe Bay, Oahu, Hawaii belonging to the ubiquitous and versatile Roseobacter clade of the alphaproteobacterial family Rhodobacteraceae. ...
Sangwan, Naseer; Xia, Fangfang; Gilbert, Jack A. (BioMed Central, 2016-03-08)Assembly of metagenomic sequence data into microbial genomes is of fundamental value to improving our understanding of microbial ecology and metabolism by elucidating the functional potential of hard-to-culture microorganisms. ...
Wooding, Christine M.; Furey, Heather H.; Pacheco, Marguerite A. (Woods Hole Oceanographic Institution, 2005-01)This report and its accompanying webpage (http://www.whoi.edu/science/PO/rafos/index.htm) describe the processing steps for RAFOS floats, from subscribing to Service Argos to plotting the final data for a data report. ...