Plum Island Ecosystems LTER Database

Acceptance and utilization of LTER data requires that:

(1) The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
(2) The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
(3) A copy of any resultant publications should be sent to:

Principal Investigator
Ecosystems Center
Marine Biological Laboratory
7 MBL St.
Woods Hole, MA 02543

Dataset URLs:METADATA: HTML, Rich Text, XML(EML compliant)
DATA: Comma Delimited, Excel file with Metadata and data
Dataset ID:PHY-PR-SF6-1996.01
Dataset Title:Year 1996, eight SF6 concentration transects along the Parker River Plum Island Sound Estuary
Investigator 1: 
First Name:Chuck
Last Name:Hopkinson
Address line 1:Georgia Sea Grant
Address line 2:University of Georgia
Address line 3:229 Marine Sciences
Zip Code:30602
Associate Investigators:Jane Tucker, Steve Carini, Nathaniel Weston, Joseph Vallino, Charles Hopkinson, Anne Giblin, Robert Garritt
Keywords:PIE LTER, Parker River, advection, dispersion, exchange, transect, wind, SF6, gas
Abstract:Eight SF6 concentration transects along the Parker River Plum Island Sound Estuary after the addition of SF6 to the estuary, and wind speed over the course of the study.
Contact: Plum Island Ecosystems LTER Information Manager
The Ecosystems Center
Marine Biological Lab
7 MBL St
Woods Hole, MA 02543
Phone (508) 289 7485
Online URL:
Data File URL
Data File Name PHY-PR-SF6-1996
Beginning Date 6/25/1996
End Date 7/2/1996
Number of Data Records 2236
Other Files to Reference
Availability Status Type 1
Quality Control Information
Maintenance Description
Log of Changes: Version 01: February 28, 2012, updated data and metadata. Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 2/9/12 1:33 PM for QA/QC to EML 2.1.0
Geographic Description PIE LTER research site including watersheds and estuary, Essex County, MA  
Location Bounding Box    
West Bounding Coordinate -71.22  
East Bounding Coordinate -70.75  
North Bounding Coordinate 42.83  
South Bounding Coordinate 42.5  
OR if single point location    
Taxonomic Protocols
Organisms studied
Methods:In July, 1996, at a slack high tide, we injected ~0.004 moles of SF6 into the upper Parker River estuary. We added rhodamine dye at the same time in order to locate the tracer plume with an in situ fluorometer. The tracer was allowed to mix for one tidal cycle and we then sampled SF6 concentration in the water at each of seven successive high tides, and once again four days later. Surface water samples were drawn into 100 ml glass syringes, transported submerged in river water to a field laboratory, and analyzed within 6 hours using gas chromatography with electron capture detection. Wind speed was meaured using a continuously recording anomometer installed on the high marsh adjacent to the tracer addition site.

Data Table

Variable Name Variable Description Units Measurement Scale Code Information Number Type DateTime Format Missing Value Code Missing Value Code Explanation
DATE date and time (dd-mmm-yyyy)   datetime     dd-mmm-yyyy   blank cell
TIME time (hh:mm)   datetime     hh:mm   blank cell
STATION sampling station   nominal         blank cell
DIST distance from Parker Dam (km) kilometer ratio   real     blank cell
SF6 SF6 concentration (M) mole ratio   real     blank cell
WIND windspeed (m sec-1) meterPerSecond ratio   real     blank cell