DOI: 10.5061/dryad.nh035
title: Data from: A compendium of geochemical information from the Saanich Inlet water column

description: Marine oxygen minimum zones (OMZs) are widespread and naturally occurring
 water column features that constitute ~7% of global ocean volume, but
 contribute disproportionately to biogeochemical cycling of carbon,
 nitrogen and climate active trace gases such as nitrous oxide and methane.
 Climate change compounded by other human activities is causing OMZ
 expansion. While microbial communities are the primary engines driving
 biogeochemical cycles in OMZs, our current understanding of microbial
 community metabolism is hindered by a lack of time-series observations
 charting responses to changing water column oxygen-deficiency. Saanich
 Inlet, a seasonally anoxic fjord on the coast of Vancouver Island British
 Columbia is a model ecosystem for monitoring microbial community
 structure, function and dynamics in relation to changing levels of water
 column oxygen-deficiency extensible to coastal and open ocean OMZs. Here,
 we present nine years of monthly time series observations in Saanich Inlet
 encompassing water column chemistry and environmental sequence
 information. This compendium provides a unique ecological and
 biogeochemical framework for comparative community analysis and modelling
 efforts in OMZs throughout the global ocean.
description: Saanich_TimeSeries_ChemicalChemical bottle data collected from Station S3 (-123.505, 48.59166667) in Saanich Inlet, BC, Canada. This data includes unique geographical coordinates for sampling station (Decimal degrees), Numerical identifier of individual cruises (Numeric string), Date of cruise (YY-MM-DD), Sampling depth (Meters), Oxygen concentration calculated from CTD SBE (Micromolar), Phosphate (Bran Luebbe AutoAnalyser - colorimetric) (Micromolar), Silicate (Bran Luebbe AutoAnalyser - colorimetric) (Micromolar), Nitrate (Bran Luebbe AutoAnalyser - colorimetric) (Micromolar), Average Ammonium (fluorometric) (Micromolar), Average Nitrite (colorimetric) (Micromolar), Average Hydrogen sulfide (colorimetric) (Micromolar), Cell counts value quantified by flow cytometry (Number of cells per millilitre (cells/mL)), Average concentration of Nitrogen gas (headspace) (Micromolar), Standard deviation for Nitrogen gas, Average concentration of Oxygen (headspace) (Micromolar), Standard deviation for Oxygen, Average concentration of Carbon dioxide (headspace) (Micromolar), Standard deviation for Carbon dioxide, Average concentration of Nitrous oxide (headspace or automated purge-and-trap) (Micromolar), Standard deviation for Nitrous oxide, Average concentration of Methane (headspace or automated purge-and-trap) (Nanomolar), Standard deviation for Methane. For detailed description of methods see manuscript.Saanich_TimeSeries_CTD_DATACTD data from Station S3 in Saanich Inlet. This data includes unique geographical coordinates for sampling station (Decimal degrees), Numerical identifier of individual cruises (Numeric string), Date of cruise (YY-MM-DD), CTD pressure measurement in intervals of 1 meter (Decibars), CTD temperature (Celsius degrees), CTD conductivity (Millisiemens per centimetre), CTD fluorometer chlorophyll measurement (Chlorophyll concentration in milligram per cubic meter), CTD transmissometer measurement (Light transmission), CTD Photosintentically active radiation (PAR) measurement (Irradiance), CTD Dissolved oxygen sensor measurement (SBE) (Volts), Oxygen concentration based on CTD Oxygen SBE (Micromolar), CTD salinity measurement at each pressure point (Practical salinity unit), CTD density measurement at each pressure point (Sigma-theta). For detailed description on methods see manuscript.Saanich_TimeSeries_Historical_O2_DATAHistorical dissolved oxygen winkler measurements at Station S3 in Saanich Inlet from 1953 to 2007. This data includes, geographical coordinates, date (year and month), depth (meters), temperature (celcius degrees), salinity (PSU), density (sigma-theta), oxygen (milliliter per liter and micromolar). For detailed methods see the manuscript.Saanich_TimeSeries_HistoricalO2_DATA.csvSaanich_TimeSeries_Winkler_DATADissolved oxygen winkler measurements at Station S3 in Saanich Inlet from 2008-2014. This data includes unique geographical coordinates, date (year and month), depth (meters) and oxygen concentration (micromolar). See manuscript for detailed methods.