Dataset: Gulf of Maine time series CTD profiles

Name: Water profile CTD from two time series stations in the Gulf of Maine, Wilkinson Basin and Jeffreys Ledge from 2012-2013 (GoM_Calanus_2012-2013 project)
Published: 2014-09-02
Keywords: oceans

Cite This Dataset

Spatial Extent: N:42.898 E:-69.861 S:42.862 W:-70.14

Project:

RAPID: Effect of a Very Low NAO Event on the Abundance of the Lipid-Rich Planktonic Copepod, Calanus finmarchicus, in the Gulf of Maine (GoM_Calanus_2012-2013)

Principal Investigator:

Jeffrey A. Runge (Gulf of Maine Research Institute, GMRI)

Contact:

Cameron Thompson (Gulf of Maine Research Institute, GMRI)

BCO-DMO Data Manager:

Ms Dicky Allison (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

preliminary

Version Date:

2014-09-02

Validated:

Current State:

Final with updates expected

Water profile CTD from two time series stations in the Gulf of Maine, Wilkinson Basin and Jeffreys Ledge from 2012-2013 (GoM_Calanus_2012-2013 project)

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Description

CTD data were collected from two stations, one deep and one shallow in the Gulf of Maine, specifically Wilkinson Basin(deep) and Jeffreys Ledge(shallow), on day trips in 2012 and 2013. These data are part of a time series of data which includes abundance of the copepod, Calanus finmarchicus, other zooplankton and chlorophyll a and phaeophytin pigment data.

Users are requested to consult with Jeffrey Runge prior to preparation of any manuscripts or reports, either written or online, that make use of zooplankton and hydrographic data originating from this study. The data are freely available without need for consultation with Dr. Runge after October, 2017.

Methods & Sampling

"At each station a CTD cast was made by the UNH group [Doug Vandermark and Joe Salisbury] , and Niskin bottles were used to capture water samples at depth ( 2, 10, 20, 40 meters). Water was filtered immediately on the vessel using glass fiber filters (GF/F) and polycarbonate membrane filters with pore sizes of 5µm and 20µm. Following Strickland and Parsons (1972) the filters were processed for Chl a and Phaeopigments." (from the Cruise Report)

Data Files

File
WBTS_CTD_profiles.csv (Comma Separated Values (.csv), 313.78 KB) MD5:4a22018c8e87c4470e1f2c59f1acfa79 Primary data file for dataset ID 527132

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1235920

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
GC_GoM_2012-2013		2012-04-06	R/V Gulf Challenger	Jeffrey A. Runge (Chief Scientist)	data info

Instruments

CTD Sea-Bird 911

Supplied Name: CTD SBE 911

Supplied Description:

UNH acquired a new shipboard CTD system in at the end of 2013. These data were collected in 2012 and 2013. It remains to be verified if the CTD system used for these data is the new system or the old system.

This is from the Gulf Challenger website: The system includes 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 provides high resolution vertical profiling of hydrographic properties (e.g. conductivity, salinity, temperature), physiochemical properties (e.g. pH and Photosynthetically Active Radiation (PAR)), and surrogates for biological and geological processes (e.g. dissolved oxygen, chlorophyll-a fluorescence and beam transmittance) that are an essential component of oceanographic field research.

The winch is outfitted with 400 meters of armored coax conducting wire that will allow profiling to the bottom anywhere within the Gulf of Maine (a maximum of 330 m depth). The unit will allow researchers to observe the CTD profile data in real time, and trip water sample bottles at optimal depths on the up-cast. An altimeter allows the system to be lowered safely to within 0.5 meter of the bottom without danger of hitting bottom and provides data to the researcher on a real-time computer monitor, as well as to the winch operator through a remote depth/altitude readout at the winch station.

Instrument Type

Generic Name: CTD Sea-Bird 911

Acronym: CTD SBE 911

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0035/

Generic Description:

The Sea-Bird SBE 911 is a type of CTD instrument package. The SBE 911 includes the SBE 9 Underwater Unit and the SBE 11 Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 and SBE 11 is called a SBE 911. The SBE 9 uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 and SBE 4). The SBE 9 CTD can be configured with auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). More information from Sea-Bird Electronics.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
station	Either the Jeffreys ledge station WB-5 or Wilkinson Basin WB-7	text	station
site	descriptive text for station	text	site
lat	latitude	decimal degrees; North is positive	lat
lon	longitude	decimal degrees; West is negative	lon
cruise_nom	Each deployment has its own cruise ID following this format: GC for R/V Gulf Challenger; followed by the date (mmddyy)	text	cruise_name
date_local	two digit date local time	mmddyyyy	date_local
yrday_local	day of year local time	number	yrday_local
depth	Water depth of observation	meters	depth
temp	water temperature	degrees Celsius	temp
sal	salinity	practical salinity units	sal
year	year of observation	YYYY	year

Status message

Database

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Dataset: Gulf of Maine time series CTD profiles