Long-term Oceanographic Observations in Western Massachusetts Bay Offshore of Boston, Massachusetts: Data Report for 1989-2002Entry ID: USGS-DDS-74
Abstract: Long-term oceanographic observations have been made at two locations in western Massachusetts Bay: (1) Site A (42ý 22.6' N, 70ý 47.0' W, 33 m water depth) from from 1989 to 2002, and (2) Site B (42ý 9.8' N, 70ý 38.4' W, 21 m deter depth) from 1997 to 2002. Site A is approximately 1 km south of the new ocean outfall that began discharging treated sewage effluent from the Boston metropolitan area ... into Massachusetts Bay in September 2000. These long-term oceanographic observations have been collected by the U.S. Geological Survey (USGS) in partnership with the Massachusetts Water Resources Authority (MWRA) and with logistical support from the U. S. Coast Guard (USCG). This report presents time series data collected through December 2002, updating a similar report that presented data through December 2000 (Butman and others, 2002).
The long-term observations at these two stations are part of a USGS study designed to understand the transport and long-term fate of sediments and associated contaminants in the Massachusetts Bays (see //woodshole.er.usgs.gov/project-pages/bostonharbor / and Butman and Bothner, 1997). The long-term observations document seasonal and inter-annual changes in currents, hydrography, and suspended-matter concentration in western Massachusetts Bay, and the importance of infrequent catastrophic events, such as major storms or hurricanes, in sediment resuspension and transport. They also provide observations for testing numerical models of circulation.
This data 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 and ASCII format for the period December 1989 through December 2002. 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 long-term data set .
[Summary provided by the USGS.]
Data Set Citation
Dataset Originator/Creator: Bradford Butman, Michael H. Bothner, P. Soupy Alexander, Frances L. Lightsom, Marinna A. Martini, Benjamin T. Gutierrez, and William S. Strahle
Dataset Title: Long-term Oceanographic Observations in Western Massachusetts Bay Offshore of Boston, Massachusetts: Data Report for 1989-2002
Dataset Series Name: USGS Digital Data Series
Dataset Release Date: 2004
Dataset Publisher: U.S. Geological Survey
Issue Identification: DDS-74
Data Presentation Form: digital dataOnline Resource: http://pubs.usgs.gov/dds/dds74/
Start Date: 1989-12-01Stop Date: 2002-12-01
OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH
OCEANS > MARINE SEDIMENTS > SEDIMENT TRANSPORT > SEDIMENT TRAPPING RATE
OCEANS > OCEAN CHEMISTRY
OCEANS > OCEAN CIRCULATION > FRESH WATER FLUX
OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS
OCEANS > OCEAN CIRCULATION > OCEAN MIXED LAYER
OCEANS > OCEAN CIRCULATION > WATER MASSES
OCEANS > OCEAN PRESSURE > WATER PRESSURE
OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
OCEANS > SALINITY/DENSITY > SALINITY
OCEANS > SALINITY/DENSITY > SALT TRANSPORT
SPECTRAL/ENGINEERING > RADAR
Quality These data have been edited to remove wild points and data recorded when the
instruments were out of the water before and after deployment.
Biological fouling often degrades light transmission data after several months
of deployment. Organisms grow on the transmissometer lenses and gradually block
light ... transmission, which results in a gradual upward drift of the beam
attenuation coefficient. This drift occurs more quickly and is more severe at
shallower depths. The attenuation data plots have not been corrected for
biological fouling and should be interpreted with care.
Tripod salinities in 1989 - 1996, were erroneously low by as much as one psu by
the end of the 4-month deployments, due to fouling of the conductivity cells.
Tripod conductivity data was apparently affected by a slow, gradual build-up of
a biological film on the electrodes and also occasional sudden depositions of a
significant volume of material (possibly sediments) inside the measurement
volume of the conductivity cell. In June 1996 (mooring 470), Seabird pumps were
added to the MIDAS to flush the conductivity cell prior to making a
measurement, reducing the affect of deposits on the conductivity measurements.
The salinity data should be used and intepreted with care.
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.
Data Set Progress
Distribution Media: Online
Distribution Format: NetCDF, ASCII
Fees: No fees
Role: DIF AUTHOR
Phone: (301) 614-6898
Email: Tyler.B.Stevens at nasa.gov
NASA Goddard Space Flight Center Global Change Master Directory
Province or State: MD
Postal Code: 20771
Role: TECHNICAL CONTACT
Email: flightsom at usgs.gov
U.S. Geological Survey 384 Woods Hole Road
City: Woods Hole
Province or State: Massachusetts
Postal Code: 02543-1598
Role: TECHNICAL CONTACT
Email: bbutman at usgs.gov
U.S. Geological Survey Woods Hole Science Center 384 Woods Hole Road
City: Woods Hole
Province or State: Massachusetts
Postal Code: 02543-1598
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Creation and Review Dates
DIF Creation Date: 2005-07-28
Last DIF Revision Date: 2011-07-01