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CTD data from CGOA trawl cruises
Two related data objects: Trawl catch data Fork length data from trawls
From PI: All CTD Data were collected using a Seabird Seacat SBE 19 CTD, equipped with a WetStar fluorometer.
Additional information related to the events listed in these files can be queried from the GLOBEC event logs on file for each cruise.
Questions about these data should be directed to: Jack Piccolo UAF / SFOS 11120 Glacier Highway Juneau, AK 99801 ftjjp1@uaf.edu Phone: 907-796-2055
BCO-DMO data manager processing notes: * Version 2 (2021-06-08) replaces version 1 (2008-10-23). Character encoding converted to utf-8. A seabird headerline which was in the middle of the dataset as a data line was removed.
Also called Seacat, with pump and Wetlabs fluorometer. Lowered to 100m depth at all fish stations.
The Sea-Bird SBE 19 SEACAT Recorder measures conductivity, temperature, and pressure (depth). The SEACAT is self-powered and self-contained and can be deployed in profiling or moored mode. The SBE 19 SEACAT was replaced in 2001 by the 19plus. more information from Sea-Bird Electronics
Wetlabs
A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.
Note that this group used non standard cruise names; this field uses the standard naming convention; ('cruise_alt' below is alternate name).
Vessel that deployed the gear.
Year of the cruise.
Alternate name for cruise -- The UAF GLOBEC cruise ID.
station-cast DMO note: there is occasional discrepancy between trawl data and cruise eventlog for this field. This is the UAF GLOBEC event number but not the eventlog event number.
Sequential station number.
CTD cast number.
latitude; North is positive; this info came from the cruise eventlog
longitude; East is positive; this info came from the cruise eventlog
date measurements were taken
Stations revisited by many cruises.
pressure
water temperature on the ITS 68 scale
density using the primary sensors
conductivity
fluorescence - WetStar chlorophyll concentration
depth of the measurement in the ocean
potential temperature, IPTS-68
adjusted Salinity
density, sigma-theta