Dataset: GOMEPRO: CTD - Profiles

Name: CTD profiles located along transects oriented either across-shelf or along-shelf, from multiple day trips in the coastal waters, Gulf of Maine from 2015-2016 (GOMEPRO project)
Published: 2017-09-06
Keywords: oceans

Cite This Dataset

Spatial Extent: N:44.8051 E:-66.9634 S:42.3867 W:-70.9252

Project:

Intertidal community assembly and dynamics: Integrating broad-scale regional variation in environmental forcing and benthic-pelagic coupling (GOMEPRO)

Principal Investigator:

Philip O. Yund (Downeast Institute for Applied Marine Research and Education, DEI)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version Date:

2017-09-06

Restricted:

Release Date:

2018-12-31

Validated:

Yes

Current State:

Final no updates expected

CTD profiles located along transects oriented either across-shelf or along-shelf, from multiple day trips in the coastal waters, Gulf of Maine from 2015-2016 (GOMEPRO project)

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Description

CTD (conductivity, depth, temperature) casts taken at discrete stations located along transects in the Gulf of Maine in 2015 and 2016.

Methods & Sampling

Transects were separated by circa 1-1.5 nautical miles and were oriented either across-shelf or along-shelf. Sampling was limited to 2 hrs. in the middle of the tidal cycle, on either flood or ebb tides. CTD was a YSI Castaway. Headers in 2016 data files contain coordinates of the instrument at the start and stop of each cast.

Labeling conventions for "Transect":
Transects ending in "AS" or "A" are oriented along-shelf
Transects ending in "XS" or "X" are oriented across-shelf
Transect QMC contains both across-shelf and along-shelf components

Data Processing Description

All processing was via YSI software. Depths were calculated from pressures and all measured values expressed as depth. Up-cast data were excluded, so only down-cast data are presented. File type is csv.

BCO-DMO Data Manager Processing Notes:
* added a conventional header with dataset name, PI name, version date
* added ISO Date (yyyy-mm-dd) added in addition to date in format yymmdd
* modified parameter names to conform with BCO-DMO naming conventions
* rounded values to 2 decimal places (were as long as 17 decimal places)
* added station information from ctd_station dataset (added station lat/lon)
* added sampling location information from information in filenames and foldernames (Site, Orientation, Tide, Station, etc)
* added "Along and Across" as the value for QuoddyMooseCove based on note "Transect QMC contains both across-shelf and along-shelf components"

Data Files

File
ctd.csv (Comma Separated Values (.csv), 4.37 MB) MD5:25c31b5eda489ffd4c91ac384214635a Primary data file for dataset ID 699745

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1458188

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
Yund_GoME		2012-08-01	R/V C-HAWK	Philip O. Yund (Principal Investigator)	data info

Instruments

CTD - profiler

Supplied Name: YSI Castaway

Supplied Description:

Instrument Type

Generic Name: CTD - profiler

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/130/

Generic Description:

The Conductivity, Temperature, Depth (CTD) unit is an integrated instrument package designed to measure the conductivity, temperature, and pressure (depth) of the water column. The instrument is lowered via cable through the water column. It permits scientists to observe the physical properties in real-time via a conducting cable, which is typically connected to a CTD to a deck unit and computer on a ship. The CTD is often configured with additional optional sensors including fluorometers, transmissometers and/or radiometers. It is often combined with a Rosette of water sampling bottles (e.g. Niskin, GO-FLO) for collecting discrete water samples during the cast.

This term applies to profiling CTDs. For fixed CTDs, see https://www.bco-dmo.org/instrument/869934.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
Year	Year of sampling	unitless	year
Site	Site name	unitless	site
Transect	Transect code (see acquisition description for codes)	unitless	transect
Station	Station number (can be negative)	unitless	station
Station_lat	Station latitude (nominal)	decimal degrees	lat
Station_lon	Station longitude (nominal)	decimal degrees	lon
Date_ISO	Date in format yyyy-mm-dd	unitless	date
yymmdd	Station sampling information (time and can contain "A" or "B")	unitless	sample_descrip
Tide	Tide description (e.g. Ebb or Flood)	unitles	site_descrip
Orientation	Orientation of sampling; Along or across shelf	unitless	site_descrip
Transect_Description	Description of transect including site and date	unitless	site_descrip
Pressure	Pressure	Decibar	press
Depth	Sample Depth	meters	depth
Temperature	Temperature	Celsius	temp
Conductivity	Conductivity	MicroSiemens per Centimeter	cond
Specific_conductance	Specific_conductance	MicroSiemens per Centimeter	specc
Salinity	Salinity	Practical Salinity Units (PSU)	sal
Sound_velocity	Sound velocity	Meters per Second	sound_vel
Density	Density	Kilograms per Cubic Meter	density

Status message

Database

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Dataset: GOMEPRO: CTD - Profiles