Dataset: Underway Discrete
Deployment: HLY1303

(See individual deployments)

Sampling and Analytical Methodology:

Total CO2:
The analysis was done at the Ocean Acidification Research Center at the University of Alaska Fairbanks with a Marianda Versatile Instrument for the Determination of Titration Alkalinity (VINDTA) 3C coupled with a coulometer (UIC, Inc.). The samples were standardized using Certified Reference Materials (CRMs) provided by Dr. A. Dickson of Scripps Institution of Oceanography. Each 250 mL sample was poisoned with 0.2 mL of mercuric chloride. CRM batch numbers and correction magnitude:
129 (2016 ± 0.32) and 133 (2021.12 ± 0.44)
Method Reference: Mathis et al., 2010; Dickson et al. 2007. Bates et al., 2001
Whole cruise CRM values varied by ± 2.73 µmol kg-1

Alkalinity:
Alkalinity was measured by an open cell, high precision potentiometric titration on a VINDTA (#19 and 34) instrument with a 250 mL sample. CRM Scale: Batch 129 (2237 ± 0.52 µmol kg-1) and 133 (2224.37 ± 0.96 µmol kg-1). Whole cruise CRM values varied by ± 3.22 µmol kg-1. Method References: Mathis et al., 2010; Dickson et al. 2007. Bates et al., 2001

Related files and references:
Mathis, J.T. and Monacci, N.M. 2014. Hydrographic and chemical data obtained during the USCGC Healy Cruise HLY1303 in the Arctic Ocean. October 05-30, 2013. Ocean Acidification Research Center, University of Alaska Fairbanks, USA