Index of /ftp/oceans//CLIVAR/75N_2006.data

Name	Last modified	Size

Parent Directory		-
58GS20060721.exc.csv	03-Sep-2009 11:23	216K
Format_metadata_discrete_measurements_58GS20060721.xls	03-Sep-2009 11:24	27K

Please, site these data set as:

Olsen, A. and A. Omar. 2007. G.O. Sars Repeat Section 75N_2006 cruise data (2006).
http://cdiac.ornl.gov/ftp/oceans/CLIVAR/75N_2006.data/. Carbon Dioxide
Information Analysis Center, Oak Ridge National Laboratory, US Department
of Energy, Oak Ridge, Tennessee. doi: 10.3334/CDIAC/otg.CLIVAR_75N_2006

BOTTLE,20090903PRINUNIVRMK
# README intiialized 12/1/08
# Final data from A.Olsen 11/27/08
# Ship: G.O. Sars
# Cruise: 111 2006
# EXPOCODE: 58GS20060721
# DATES: 21/7 -3/8, 2006
# Region: Akureyri, Iceland, across 75 and 74.5N, Troms�, Norway.
# Chief Scientist Are Olsen, Bjerknes Centre for Climate Research, Univ. Bergen, Norway.
# 67 stations with 24 and 12 place Rosette
# 24 Bottle from station 253 through 270
# 12 Bottle from station 271 through 320
# When the 12 bottle rosette was used we sometimes had to do two casts at each position to cover all depths.
# These two casts were given DIFFERENT station numbers.
# The times given are start of each station.
# Throughout the cruise, two bottles were triggered at the same depth at every station to evaluate sample handling and
# analysis precision. Stated precision is the mean absolute difference between the replicates
# Hydro: Who - Are Olsen; Univ. Bergen, Norway; Status -final
# Salinity are bottle samples analyzed at a PORTASAL, specs gives accuracy of 0.003
# CTDSAL, from SEABIRD 911. Upcast data corrected for offset towards bottle salinity values. Station 254 bad CTDSAL, sensor was acting up.
# Salinity precision evaluated from duplicate niskin bottles: +/- 0.002
# Nuts: Who - A. Anita Nybakk/Institute of Marine Research, Bergen, Norway; Status -final
# QUASIMEME calibration program.
# nitrate precision evaluated from duplicate niskin bottles: +/- 0.07 umol/kg
# phosphate evaluated from duplicate niskin bottles: +/- 0.01 umol/kg
# silicate evaluated from duplicate niskin bottles: +/- 0.03 umol/kg
# O2: Who - Kelly R. Brown, Bjerknes Centre for Climate Research, Univ. Bergen, Norway; Status -final
# Winkler titration of bottle samples
# Density for winkler samples were determined from draw temperatures (not included in final file) and corrected CTDSAL - also for 254, no significant difference compared to using bottle sal.
# precision evaluated from duplicate niskin bottles: +/- 0.2 umol/kg
# CTDOXY: Who: Are Olsen, Univ. Bergen, Norway; Status -final
# These are upcast values from the Seabird that have been corrected for offset towards the winkler samples, conversion to per kg using theta.
# TCO2: Who - Abdirahman Omar & Are Olsen, Univ. Bergen, Norway; Status -final
# Two SOMMA instruments
# CRM used. The values were corrected using different correction factors for each cell,
# based on the CRM analyzed at the start and end of each cell. The correction factors were allowed to change
# linearly through each cell's lifetime, this gave minimum station-to-station differences.
# Using a constant factor for each instrument was also tested, no or very little difference.
# The corrections were generally small, 0-2 umol/kg, but required to get the data from the two instruments consistent.
# precision evaluated from duplicate niskin bottles: +/- 0.7 umol/kg
# TA: Who - Abdirahman Omar & Are Olsen, Univ. Bergen, Norway; Status -final
# Gran titration on a VINDTA system
# CRM used, The values were corrected using a linear fit to correction factors from 116 CRM samples throughout the cruise.
# The quality of the TA data from this cruise is not optimal.
# We attribute this to problems with the acid dispension that were later discovered. The data are scattered, and seems around 5 umol/kg
# higher than data from earlier cruises. Flagging removed the worst outliers.
# The data should not be used for work that requires high precision and accuracy.
# precision evaluated from duplicate niskin bottles: +/- 4 umol/kg, although this seems fine, I'd say it is optimistic.
# CFC: Who Anders Olsson & Emil Jeansson, Univ. Bergen; Status - final; S Plus - up to date
# Notes: standard calibration techniques
# CFC-12 precision 2.5%
# CFC-11 precision 1.6%
# Precision estimates supplied by Emil Jeansson.