#------------------------# Water quality cast data PRELIMINARY - SUBJECT TO REVISION Northwest National Marine Renewable Energy Center University of Washington Branch Seattle, WA 98195 Contact: nnmrec@u.washington.edu Website: http://depts.washington.edu/nnmrec Survey Location: Admiralty Inlet, Puget Sound, WA Equipment: Instrumented CTD rosette (SeaBird 911+) Measurement Approach: - Instrumented rosette casts over entire water column - On some casts, Niskin bottles fired near seabed, -30m, -10m, -3m (surface) - Sensors include temperature, pressure, conductivity, dissolved oxygen, pH, turbidity, and chlorophyll - Not all sensors reported QA/QC Protocol: - Dissolved oxygen values corrected based on wet chemistry results (slope and offset) - Cast series with bad sensor connections (e.g., cross-talk due to splitter cable) - Missing data alternatively represented by 0 value, empty structures, or NaN - All times reported in PST (GMT -8:00) Header Change Log: - 11/23/09 (BLP) Initial release File Change Log: Cast_ADM_042009.mat - 11/23/09 (BLP) Initial release Cast_ADM_052009.mat - 11/23/09 (BLP) Initial release Cast_ADM_082009.mat - 11/23/09 (BLP Initial release Cast_ADM_112009.mat - 11/23/09 (BLP Initial release Data are stored in MATLAB structures: - cast: data collected by sensors during water quality cast - bottle: sensor data associated with a particular Niskin bottle sample - bottle_mean: mean sensor data associated with a particular Niskin bottle sample - chem: results of wet chemistry analysis of Niskin bottle samples - cal: slope and offset calibration for oxygen sensors based on comparison to wet chemistry -- cast structure -- cast(n): individual cast cast(n).down: downcast sensor data cast(n).up: upcast sensor data .lat: cast latitude (decimal degrees - ship position) .lon: cast longitude (decimal degrees - ship position) .scan: scan number relative to start of reported cast data .time: serial time (MATLAB format) - PST (GMT -8:00) .pres: pressure (dB) .z: depth (m) .T: temperature (C) (up to 2 channels) .S: salinity (PSU) (up to 2 channels) .C: conductivity (S/m) (up to 2 channels) .rho: density (kg/m3) (up to 2 channels) .O: dissolved oxygen (mg/L) (up to 2 channels) .pH: pH .Tb: turbidity (NTU) .chl: flurescence (ug/L) -- bottle structure -- bottle(n): bottle data from specific cast - all scans around bottle firing Data fields repeat those in cast.down/cast.up structures .bottle: number of bottle fired -- bottle_mean structure -- bottle_mean(n): mean bottle data from specific cast Data fields repeat those in bottle structure, with a single value reported for each bottle -- chem structure -- chem(n): wet chemistry data associated with particular cast .bottle: Niskin bottle associated with chemistry results .z: depth of bottle (matches bottle_mean) .O: dissolved oxygen (mg/L) .Tb: turbidity (NTU) .TP: total phosphorous (uM) .TN: total nitrogen (uM) .PO4: [PO4] (uM) .SiOH4: [Si(OH)4] (uM) .NO3: [NO3] (uM) .NO2: [NO2] (uM) .NH4: [NH4] (uM) .chl: chlorophyll (ug/L) .S: salinity (PSU) #------------------------#