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:
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 Title:||Year 2001, 15 minute interval, water quality measurements of water column temperature, salinity, oxygen, and depth near the mouth of Plum Island Sound, Massachusetts|
|Investigator 1:|| |
|Address line 1:||Ecosystems Center|
|Address line 2:||MBL|
|Address line 3:||7 MBL St|
|Associate Investigators:||Hap Garritt|
|Keywords:||PIE LTER, primary production, disturbance, temperature, oxygen, conductivity, salinity, depth, turbidity, saturation, gas, Plum Island Sound, monitoring|
|Abstract:||Year 2001, 15 minute measurements of water column temperature, salinity, oxygen and depth in Plum Island Sound at the Ipswich Bay Yacht Club, Ipswich, MA.|
|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: http://pie-lter.ecosystems.mbl.edu
|DATA FILE INFORMATION:|
|Data File URL||http://ecosystems.mbl.edu/PIE/data/MON/data/MON-SO-IBYCYSI2001.csv|
|Data File Name||MON-SO-IBYCYSI2001|
|Number of Data Records||25551|
|Other Files to Reference|
|Availability Status||Type 1|
|Quality Control Information|
|Maintenance Description||Complete for 2001|
|Log of Changes:||Version 01: February 22, 2016, data and metadata updates to comply with importation to Drupal and LTER PASTA. Used MarcrosExportEML_HTML (working)pie_excel2007_Jan2015.xlsm 1/15/15 4:26 PM for QA/QC to EML 2.1.0|
|RESEARCH LOCATION:||MON-SO-IBYC Data Logger Station||Site 2|
|Geographic Description||PIE YSI water quality, OTT RLS water level and wind sensor station at Ipswich Bay Yacht Club pier, Plum Island Sound, Ipswich, MA|
|Location Bounding Box|
|West Bounding Coordinate|
|East Bounding Coordinate|
|North Bounding Coordinate|
|South Bounding Coordinate|
|OR if single point location|
|Methods:||Measurements are made using a YSI 6600 water quality sonde and YSI 6200 Data Collection Platform (DCP) with data radio telemetered to the PIE LTER Rowley field station. YSI Sonde sensors consist of 6562 dissolved oxygen probe (rapid pulse – Clark type,polarographic), 6560 conductivity/temperature probe (thermistor), vented level depth sensor (stainless steel strain gauge), 6026 wiping turbidity probe(optical, 90o scatter) and 6025 wiping chlorophyll probe (optical fluorescence).|
NOTES AND COMMENTS: Chlorophyll and fluorescence data typically does not calibrate well and data should only be used for relative purposes of looking at highs and lows of phytoplankton blooms not real concentrations.
Missing data or blank values are caused by maintenance time periods or where sensor measurements are obviously wrong in the context of what would be expected. For example, the conductivity sensor has a relatively small opening and chamber for the conductivity electrodes, the estuary can have varying suspended sediment/detrital loads moving in the water column which enter the conductivity cell shorting out the electrodes making a faulty conductivity measurement (lower than expected). Oxygen measurements are dependent upon the conductivity measurements so the oxygen also becomes erroneous. Obvious measurements/data errors have been removed from the data set however the user of this data should also conduct their own data analysis to determine if the data are suitable for their particular situation.
Typical sensor/data problems are:
For oxygen: Fouling of Clark style DO probe where membrane gets a brownish bacterial? film affecting DO sensor readings/calibration checks.
For conductivity: Conductivity cell can have detrital material stuck in it, shorting out cell, resulting in lower than expected conductivity.
For depth: Depth strain gage pressure sensor may come out of the water at low tides resulting in many "zero" depth readings or sometimes negative values.
|Variable Name||Variable Description||Units||Measurement Scale||Code Information||Number Type||DateTime Format||Missing Value Code||Missing Value Code Explanation|
|Date||Date of sampling||datetime||DD-MON-YYYY|
|Time||Time of sampling (eastern standard time EST, 24 hour)||datetime||hh:mm|
|Station||Name of sampling station||nominal||NA||NA = data not available|
|Temp||Temperature of water||celsius||interval||real||NA||NA = data not available|
|SpCond||Specific conductivity of water||millisiemenPerCentimeter||ratio||real||NA||NA = data not available|
|Salinity||Salinity of water||partPerThousand||interval||real||NA||NA = data not available|
|DO%||Percent dissolved oxygen saturation of water||percent||ratio||real||NA||NA = data not available|
|DO Conc||Dissolved oxygen concentration of water||milligramPerLiter||ratio||real||NA||NA = data not available|
|DO Charge||Dissolved oxygen sensor charge||dimensionless||ratio||real||NA||NA = data not available|
|Depth||Water column depth above sonde pressure transducer||meter||ratio||real||NA||NA = data not available|
|Turbidity||Turbidity of water||nephelometricturbidityunit||ratio||real||NA||NA = data not available|
|Chlorophyll||Chlorophyll concentration in water||microgramPerLiter||ratio||real||NA||NA = data not available|
|Fluorescence||Fluorescence of chlorophyll in water||percent||ratio||real||NA||NA = data not available|
|Comments||Comments about specific data||nominal||NA||NA = data not available|