Gulf of Maine WBTS CTD Observations

Salinité de surface

The R/V Gulf Challenger system comprised a Sea-Bird Electronics (SBE) 25Plus CTD, an SBE-55 Sampling Rosette with six four-liter Niskin bottles, a dedicated Hawboldt Industries SPR 1424/S Science winch, and a SBE-33 real-time monitoring and sampling deck unit. The system provided high resolution vertical profiling of hydrographic properties (e.g. conductivity, salinity, temperature). The raw CTD data and bottle trips were acquired by SBE Seasave on a Windows 7 workstation and were processed from hex files to cnv files. Post cruise data processing was completed on a Windows 7 machine running SEABIRD SBE DATA Processing version 7.22.5 At most stations, Niskin bottles were used to capture water samples at depths of 2, 10, 20 and 40 meters. To measure chlorophyll a concentration at discrete depths, duplicate, 100 mL or 500-550 mL subsamples were collected from Nisken bottles at the surface, 10, 20 and 40 meters. Water was filtered immediately on the vessel using glass fiber filters (GF/F) and polycarbonate membrane filters with pore sizes of 0.7 Âµm and 0.1Âµm. Chlorophyll a concentrations were calculated were using equations in Strickland and Parsons (1972). Prior to 2014, IOP profilers calibrated annually were used to measure water column stimulated fluorescence along with discrete chlorophyll concentration measurements. After 2014, the nominal chlorophyll a readings from stimulated fluorescence measured with a Wetlabs Wetstar Chorophyll Fluorometer S/N WSS-164 were corrected with chlorophyll concentrations measured from bottle samples.

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Informations supplémentaires

Étendue temporelle	2004-10-29 – 2024-03-14
Date (creation)	2026-11-04
Statut	onGoing
Fréquence de mise à jour	asNeeded
Langue des métadonnées	en
Licence	The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, ERD, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
Métadonnées sources	ISO 19115 XML
Dernière mise à jour	2026-11-04
Créé	2026-11-04
API	package_show