Dataset: CTD - Downcasts
Deployment: MuLTI-2_Across_Shelf

CTD - Downcasts

Principal Investigator:

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

Contact:

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

BCO-DMO Data Manager:

Stephen R. Gegg (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

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

Project:

An integrated theoretical and empirical approach to across-shelf mixing and connectivity of mussel populations (MuLTI-2)

Version:

29 October 2015

Version Date:

2015-10-29

Data URL:

https://www.bco-dmo.org/dataset-deployment/614752/data

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Description

Data from CTD downcasts on transects in coastal eastern Maine collected during the MuLTI-2 Project.

These data were published in Conlon et al. (2018).

Across-shelf cruises
MuLTI-2_ChandlerBayAcrossShelf_20140620_Ebb
MuLTI-2_ChandlerBayAcrossShelf_20140717_Flood
MuLTI-2_ChandlerBayAcrossShelf_20150715_Ebb
MuLTI-2_ChandlerBayAcrossShelf_20150709_Flood
MuLTI-2_EnglishmanBayAcrossShelf_20140808_Ebb
MuLTI-2_EnglishmanBayAcrossShelf_20140711_Flood
MuLTI-2_EnglishmanBayAcrossShelf_20150730_Ebb
MuLTI-2_EnglishmanBayAcrossShelf_20150717_Flood
MuLTI-2_FrenchmanBayUpperAcrossShelf_20140812_Flood
MuLTI-2_FrenchmanBayUpperAcrossShelf_20150610_Flood
MuLTI-2_FrenchmanBayUpperAcrossShelf_20150625_Ebb
MuLTI-2_FrenchmanBayUpperAcrossShelf_20150828_Ebb
MuLTI-2_FrenchmanBayUpperAcrossShelf_20150608_Flood
MuLTI-2_FrenchmanBayLowerAcrossShelf_20140812_Ebb
MuLTI-2_FrenchmanBayLowerAcrossShelf_20150626_Ebb
MuLTI-2_FrenchmanBayLowerAcrossShelf_20150825_Flood
MuLTI-2_MachiasBayAcrossShelf_20140627_Ebb
MuLTI-2_MachiasBayAcrossShelf_20150807_Flood
MuLTI-2_PigeonHillAcrossShelf_20140718_Flood
MuLTI-2_PigeonHillAcrossShelf_20150714_Ebb
MuLTI-2_PleasantBayAcrossShelf_20140712_Ebb
MuLTI-2_PleasantBayAcrossShelf_20140619_Flood
MuLTI-2_PleasantBayAcrossShelf_20150806_Flood
MuLTI-2_PleasantBayAcrossShelf_20150729_Ebb
MuLTI-2_WesternBayAcrossShelf_20140619_Ebb
MuLTI-2_WesternBayAcrossShelf_20140717_Ebb
MuLTI-2_WesternBayAcrossShelf_20150707_Flood
MuLTI-2_WesternBayAcrossShelf_20150714_Flood

Along-shelf cruises
MuLTI-2_ChandlerEnglishmanBaysAlongShelf_20140711_Ebb
MuLTI-2_ChandlerEnglishmanBaysAlongShelf_20150722_Flood
MuLTI-2_ChandlerEnglishmanBaysAlongShelf_20150706_Flood
MuLTI-2_FrenchmanBayAlongShelf_20150615_Ebb
MuLTI-2_PleasantWesternBaysAlongShelf_20140624_Flood
MuLTI-2_PleasantWesternBaysAlongShelf_20140712_Flood
MuLTI-2_PleasantWesternBaysAlongShelf_20150721_Flood
MuLTI-2_PleasantWesternBaysAlongShelf_20150706_Ebb
MuLTI-2_FrenchmanBayInner_20150827_Ebb
MuLTI-2_FrenchmanBayInner_20150624_Flood
MuLTI-2_FrenchmanBayInner_20150630_Ebb
MuLTI-2_FrenchmanBayInner_20150618_Flood

Mixed
MuLTI-2_MoosabecEastern_20150811_Ebb
MuLTI-2_MoosabecEastern_20150716_Ebb

Methods & Sampling

Dataset acquisition description

CTD casts at discrete stations located along transects. Most transects are oriented either across-shelf or along-shelf (one is a mixture). Sampling was limited to 2 hrs. in the middle of the tidal cycle, on either flood or ebb tides. CTD was a YSI Castaway: www.sontek.com/productsdetail.php?CastAway-CTD-11. Calibration dates and additional information are supplied in the headers of each data file. Headers also contain coordinates of the instrument at the start and stop of each cast.

Frenchman Bay is a long transect that had to broken into two with half run on each cruise, in order to stay within our 2 hour tidal phase window. Hence the renchman Bay cruises have an "Upper" vs. "Lower" designation, but the station coordinates are continuous. To accommodate weather conditions and/or logistical delays, we did not consistently run the same set of stations on each cruise designated "Upper" vs. "Lower" cruise, but the designation indicates the general location of stations.

Data Processing Description

Dataset Processing Description

Data Processing:
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.

BCO-DMO Processing Notes
- Generated from original .csv files contributed by Phil Yund
- Routine written to reformat the original .csv files into tab separated, BCO-DMO compatible files
- Header metadata removed from original files during reformatting
- Significant header metadata preserved in transect header files generated by BCO-DMO
- Parameter names edited to conform to BCO-DMO naming convention found at Choosing Parameter Name: http://usjgofs.whoi.edu/naming-guidelines.html
- ISO formatted UTC date/time added
- 29October2015/srg (data version 2) Corrected the BCO-DMO generated link between the Transect_Id and the Data Files from that Transect_Id

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1333755	NSF Division of Ocean Sciences
OCE-1333797	NSF Division of Ocean Sciences
OCE-1334022	NSF Division of Ocean Sciences

Instruments

CTD - profiler

Supplied Name: YSI Castaway CTD

Supplied Description:

YSI Castaway CTD

Device (2014 and 2015): CC1223007

2014 Calibration Information from headers in original .csv files:
Electronics calibration date,0001-01-01
Conductivity calibration date,2012-06-01
Temperature calibration date,2012-06-01
Pressure calibration date,2012-05-31

2015 Calibration Information from headers in original .csv files:
Electronics calibration date,0001-01-01
Conductivity calibration date,2015-02-19
Temperature calibration date,2015-02-19
Pressure calibration date,2015-02-16

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.

Global Positioning System Receiver

Supplied Name: YSI Castaway CTD

Supplied Description:

YSI Castaway CTD with internal GPS sensor

Instrument Type

Generic Name: Global Positioning System Receiver

Acronym: GPS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/POS03/

Generic Description:

The Global Positioning System (GPS) is a U.S. space-based radionavigation system that provides reliable positioning, navigation, and timing services to civilian users on a continuous worldwide basis. The U.S. Air Force develops, maintains, and operates the space and control segments of the NAVSTAR GPS transmitter system. Ships use a variety of receivers (e.g. Trimble and Ashtech) to interpret the GPS signal and determine accurate latitude and longitude.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Deployment_Id	MuLTI-2 Deployment Id	text	cruise_id
Transect_Id	MuLTI-2 Transect Id	text	transect
Station_Id	CTD Station Id	text	station
Date_UTC	Date of CTD station (UTC) in the format YYYYMMDD	unitless	date_utc
Time_UTC	Time of CTD station (UTC)	HHMMSS	time_utc
Date_Local	Date of CTD station (Local) in the format YYYYMMDD.	unitless	date_local
Time_Local	Time of CTD station (Local)	HHMMSS	time_local
Lat_Start	CTD Station start latitude (South is negative)	decimal degrees	lat_start
Lon_Start	CTD Station start longitude (West is negative)	decimal degrees	lon_start
Lat_End	CTD Station end latitude (South is negative)	decimal degrees	lat_end
Lon_End	CTD Station end longitude (West is negative)	decimal degrees	lon_end
Cast_Duration	CTD Cast duration	seconds	duration
Pressure	Pressure	decibars	press
Depth	Depth	meters	depth
Temperature	Temperature	degrees Celsius	temperature
Conductivity	Conductivity	MicroSiemens per Centimeter	cond
Specific_Conductance	Specific Conductance	MicroSiemens per Centimeter	specc
Salinity	Salinity	PSU	sal
Sound_Velocity	Sound_Velocity	meters/sec	sound_vel
Density	Density	kilograms/meter^3	density

Database

Contribute Data

Dataset: CTD - Downcasts
Deployment: MuLTI-2_Across_Shelf

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: CTD - DowncastsDeployment: MuLTI-2_Across_Shelf

Dataset acquisition description

Dataset Processing Description

Dataset: CTD - Downcasts
Deployment: MuLTI-2_Across_Shelf