Butman, Bradford, Alexander, P. Soupy , Harris, Courtney K. , Traykovski, Peter A. , Marilyn B. ten Brink, Lightsom, Frances S. , and Martini, Marinna A. , 2003, Oceanographic Observations in the Hudson Shelf Valley, December 1999 - April 2000: USGS Open File Report OF 02-217, U.S. Geological Survey, Reston, VA.
Bradford Butman and Courtney Harris were co-principal investigators for the Hudson Shelf Valley experiment. Soupy Alexander processed the hydrographic data, prepared the data figures and tables, and did the report layout. Fran Lightsom processed the time-series data. Marinna Martini led the instrument preparation, deployment and recovery. Marilyn Buchholtz ten Brink and Ellen Mecray did the suspended sediment observations. Peter Traykovski was responsible for the Acoustic Backscatter Sensors (ABS) system deployments and data processing. We thank the captains and crews of the Research Vessels Oceanus, Endeavor, and Connecticut for their outstanding logistical support for this measurement program. Erin Galvin, Ben Gutierrez, Bob Barton, Dann Blackwood, JonBorden, Michael Casso, Jessica Cote, Jane Denny, Joanne Fierra, Jason Hyatt, Ellen Mecray, Andre Ramsey, Sunita Shah, Rick Rendigs, and Dave Walsh carried out the work at sea, ashore and in the laboratory. Jon Borden and Marinna Martini led the successful effort to recover the tripod from Station B using an ROV owned by the Woods Hole Oceanographic Institution and skillfully operated by Andy Girard. Donna Newman made the HTML compliant with USGS standards. This research was supported by the U. S. Geological Survey Coastal and Marine Geology Program.
Bradford Butman
U.S. Geological Survey
Oceanographer
U.S. Geological Survey
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA
508-457-2212 (voice)
bbutman@usgs.gov
The report presents a description of the field program and instrumentation, an overview of the data through summary plots and statistics, and the data in NetCDF, ASCII, and Matlab format. The objective of this report is to make the data available in digital form, and to provide summary plots and statistics to facilitate browsing of the data set.
Moored Array
Measurements were made at 6 stations, four along the axis of the valley (Stations A, B, C and F), and two on the shelf to the east and west (Stations D and E). The moored array was deployed from the RV Oceanus between December 3-7, 1999, and recovered on RV Endeavor between April 14-18, 2000.
Hydrograhy
Conductivity-temperature-depth (CTD) profiles were obtained on the moored array deployment cruise on RV Oceanus between December 5-7 1999, and on the instrument ecovery cruise on the RV Endeavor on April 15, 2000. Measurements were made with a Sea Bird SBE11 profiling conductivity-temperature-depth sensor. On the RV Oceanus cruise, profiles of light transmission and optical backscatter were also obtained and on the RV Endeavor cruise, profiles of light transmission and flourescence were obtained. Water samples were obtained at selected stations and depths and filtered through pre-weighed 0.4 micron Millipore filters to determine suspended matter concentration. The measured concentrations were used to determine calibrations for the OBS and transmission sensors.
Data Processing
Data processing was conducted using the WHOI-USGS Oceanographic Data //www.mathworks.com/), and keeps data in EPIC //www.pmel.noaa.gov/epic/). The ABS data were processed using Matlab.
After data were decoded and calibrated, they were carefully checked for instrument malfunctions and then edited. The beginning and end of each data series were truncated and wild points deleted. Short data gaps (less than about 8 data values, which is half an hour for Seacats and tripods) were filled by linear interpolation. The data were carefully checked at each stage of processing. After editing, the basic version of the data file includes all variables recorded at the basic sampling interval. An hour-averaged data file and a low-pass filtered data file were created from the basic version. The low-pass filter essentially removes all fluctuations having periods shorter than 33 hours (Flagg et al., 1976). Low-pass filtered data was subsampled every 6 hours.
Reference
Flagg, C.N., Vermersch, J.A., and Beardsley, R.C., 1976, 1974 M.I.T. New England Shelf The moored array: M.I.T. Report 76-1, Cambridge, MA, Massachusetts Institute of Technology.
Person who carried out this activity:
Fran Lightsom
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA
508-457-2242 (voice)
After data were decoded and calibrated, they were carefully checked for instrument malfunctions and then edited. The beginning and end of each data series were truncated and wild points deleted. Short data gaps (less than about 8 data values, which is half an hour for Seacats and tripods) were filled by linear interpolation. The data were carefully checked at each stage of processing. After editing, the basic version of the data file includes all variables recorded at the basic sampling interval.
Mooring and station locations were determined using GPS.
Water depths were determined sonically and are accurate to a few meters.
Data are complete. Some of the time series have gaps that can be identified by viewing the time series plots.
Data is consistent
Are there legal restrictions on access or use of the data?
- Access_Constraints:
- These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
- Use_Constraints:
- These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Biological fouling may degrade the transmission measurements after several months of deployment. Organisms grow on the lenses and gradually block light transmission, which results in a gradual upward drift of the beam attenuation coefficient. The attenuation data nor the optical backscatter data have not been corrected for biological fouling and should be interpreted with care.
U.S. Geological Survey Information Services
Box 25286 Denver Federal Center
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USA
303.202.4700 (voice)
303.202.4188 (FAX)
- Hours_of_Service: 8 a.m. to 5 p.m. Mountain Time
USGS Open-File Report 02-217
These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
Bradford Butman, U.S. Geological Survey
Oceanographer
384 Woods Hole Road
Woods Hole, Massachusetts 02543-1598
USA
508.548.8700x2212 (voice)
508.457.2309 (FAX)
bbutman@usgs.gov
- Hours_of_Service: 8 a.m. to 5 p.m. EST
These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
Bradford Butman
U.S. Geological Surveuy
Oceanographer
U.S. Geological Survey
384 Woods Hole Road
Woods Hole, MA 02543-1598
508-457-2212 (voice)