Discrete seawater samples were collected during each sampling period for salinity, nutrients, total alkalinity (TA), and dissolved inorganic carbon (DIC). Temperature and depth were recorded with HOBO temperature loggers (September 2012) and Sensus Ultra dive data loggers (2015-2016). TA and DIC analyses were performed using a Versatile Instrument for the Determination of Total inorganic carbon and titration Alkalinity (VINDTA, Marianda Analytics and Data) and standardized using certified reference materials obtained from Andrew Dickson (Scripps Institution of Oceanography).
\n
Salinity samples were analyzed at WHOI using a Guildline autosal salinometer, and nutrient samples were run at the WHOI Nutrient Analytical Facility.
\n
Seawater samples, and in situ instrument time series were collected during seven expeditions to Jarvis Island between 2008 and 2017, aboard:
\n
\n- NOAA ship Hi\u2019ialakai (27\u201329 March 2008, 2\u20134 April 2010, 3\u20135 May 2012, 2\u20135 April 2017)
\n- Pangaea Exploration S/V Sea Dragon (13\u201316 September 2012)
\n- R/V Machias (12\u201315 November 2015)
\n- NOAA ship Oscar Elton Sette (17\u201323 May 2016)
\n
\n
Research activities and sample collection were conducted under U.S. Fish and Wildlife Service Pacific Reefs National Wildlife Refuge Complex Research and Monitoring Special Use Permits
\n
\n- 12521-10001 (effective date: 15 Jan 2010; expiration date: 30 May 2010)
\n- 12521-12001 (effective date: 7 Feb 2012; expiration date: 31 Dec 2012)
\n- 12521-12005 (effective date: 29 Aug 2012; expiration date: 30 June 2014)
\n- 12521-14001 (effective date: 1 Jan 2015; expiration date: 31 Dec 2015)
\n- 12513-15001 (effective date: 11 Nov 2015; expiration date: 31 Dec 2015)
\n
\n
and in compliance with Presidential Proclamation 8336.
These data were published in Barkley et al., 2018.
\n
This dataset contains information about discrete seawater samples collected from 2012-2016 on Jarvis Island for salinity, nutrients, total alkalinity (TA), and dissolved inorganic carbon (DIC) during each sampling period.
Full CO2 system parameters were calculated from temperature, salinity, TA, and DIC using CO2SYS with the constants of Mehrbach et al. (1973) refit by Dickson and Millero (1987). Nutrient and carbonate chemistry values were consistent down to 20 m depth, and samples collected between 0 m and 20 m were averaged.
\n
BCO-DMO processing:
\n
\n- Added ISO_DateTime_UTC column
\n- Updated column headers
\n- Standardized the format of columns \"date_UTC\" and \"time_UTC\"
\n