Multi-year transects, beginning in 1995, of the Parker River Plum Island Sound Estuary conducted at dawn and dusk, containing dissolved oxygen, conductivity, temperature, percent saturation, pH, DIC and pCO2 measurements. Differences between dawn and dusk measurements can be used to determine the water metabolism and corresponding estimates of gross primary production, total system respiration and net ecosystem production.
EXPERIMENTAL DESIGN AND METHODS:
Transects were conducted in a motorboat with a sample inlet device located beneath the hull that, when the boat was moving, would force water into an enclosed chamber and past the sampling probe. Dissolved oxygen, percent saturation, conductivity, temperature and pH were measured in the chamber with a Hydrolab or YSI sonde (see ANALYTICAL METHODS). On dates when DIC and pCO2 were measured, samples were collected in the outlet line into glass bottles, and preserved with HgCl2. As we did not need to stop at each station to obtain a sample, transects were completed quickly and represent a close to instantaneous dissolved oxygen transect of the estuary.
Calculated salinity is based upon Hydrolab_Series_4a_Manual, Section 4. Conductivity sensor, page 86 with the following formula:
Salinity = c1*SpCond^4 + c2*SpCond^3 + c3*SpCond^2 + c4*SpCond + c5 where c1 = 5.9950 x 10-8, c2 = -2.3120 x 10-5, c3 =3.4346 x 10-3, c4 = 5.3532 x 10-1, c5 = -1.5494 x 10-2.
On going collection of data
01) 16Jul2007 updated to EML level 4-5
02) 27Sep2007 added new data
03) 11Jan2010 added new data
04) 16Jan2015 added new data
Version 05: January 24, 2012, updated data (including missing DIC) and metadata through 2010. Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 1/18/12 4:51 PM for QA/QC to EML 2.1.0
Version 06: February 4, 2016 updated data and metadata through 2015. Found and corrected errors in Lat and Lon for 2012 to 2014. 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
Version 07: February 21, 2016, corrected wrong data 15April2016 in data, 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
Version 08: August 26, 2019, data and metadata updates to comply with importation to DEIMS7 and LTER Data Portal. Used MarcrosExportEML_HTML (working)pie_excel2007_Jun2019.xlsm 6/7/19 12:58 PM for QA/QC to EML 2.1.0