Temperature, salinity, depth, light levels from the SECM stations from R/V John N. Cobb multiple cruises in the Coastal Southeast Alaska from 1997-2006 (NEP project)

Website: https://www.bco-dmo.org/dataset/3306
Version: 2010-02-23

Project
» U.S. GLOBEC Northeast Pacific (NEP)

Program
» U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)
ContributorsAffiliationRole
Fergusson, Emily A.National Oceanic and Atmospheric Administration - Alaska Fisheries Science Center (NOAA-AFSC-Auke)Co-Chief Scientist, Data Manager
Orsi, Joseph ANational Oceanic and Atmospheric Administration - Alaska Fisheries Science Center (NOAA-AFSC-Auke)Co-Chief Scientist, Lead Principal Investigator
Sturdevant, Molly V.National Oceanic and Atmospheric Administration - Alaska Fisheries Science Center (NOAA-AFSC-Auke)Co-Chief Scientist
Wertheimer, Alex C.National Oceanic and Atmospheric Administration - Alaska Fisheries Science Center (NOAA-AFSC-Auke)Lead Principal Investigator
Copley, NancyWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

Note: This dataset is identical to SECM_CTD_all, however, this version is configured so that the data are mapped as individual points (one per CTD cast) in the MapServer interface. See SECM_CTD_all to map the data as a time series.

This coastal monitoring study in the northern region of southeastern Alaska, known as the Southeast Coastal Monitoring Project (SECM), was initiated in 1997 and repeated from 1998 to 2006 (Orsi et al. 1997, 1998, 2000, 2001, 2002) to develop our understanding of the relationships between annual time series of biophysical data and stock-specific information.

CTD data was collected in conjunction with juvenile salmon studies in the Gulf of Alaska from 1997-2006 by the Southeast Coastal Monitoring Project.

Data include one CTD cast per station per cruise.


Methods & Sampling

The CTD data were collected with a Sea-Bird1 SBE 19 Seacat profiler to 200 m or within 10 m of the bottom. Surface (3-m) temperature and salinity data were collected at 1-minute intervals with an onboard thermosalinograph (Sea-Bird SBE 21).

Surface (bucket) and 20-m (Niskin bottle) water samples were taken once at each station for later nutrient and chlorophyll analysis.

To quantify ambient light levels, light intensities (W * m-2) were recorded at each station with a Li-Cor Model 189 radiometer.

To quantify relative water clarity, the CTD was used in lieu of a Secchi disk; depth measurements (m) were made by observing the visual disappearance of the CTD following deployment.

Also see related SECM datasets:
station data
nutrients
zooplankton
fish catch data
fish length and stomach contents

Station Codes:

station locality
ABM Auke Bay Monitor
CS A-D Cross Sound
ED A-D Cape Edward
FPR False Point Retreat
IP A-D Icy Point
IS A-D Icy Strait
LC A-D Lower Clarence
LFC Lower Favorite Channel
MC A-D Middle Clarence
TK G-I Taku Inlet transect
UC A-D Upper Chatham Strait

Data Processing Description

Use constraints: User must read and fully comprehend the metadata prior to use. User must acknowledge the Originator when using the data set as a source. User must share data products developed using the source data set with the Originator. Data should not be used beyond the limits of the source scale.


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Data Files

File
secm_ctd.csv
(Comma Separated Values (.csv), 111.26 KB)
MD5:7b78186e3286a041f46a7aa86a0652d8
Primary data file for dataset ID 3306

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Parameters

ParameterDescriptionUnits
depth_ctdCTD wire out meters
depth_secchidepth that CTD disappears meters
depth_wwater depth meters
haul_idhaul number integer
latlatitude of station, North is positive in decimal degrees
lightlight level at surface watts/meter square
lonlongitude of station. West is negative. in decimal degrees
month_localmonth of year 1-12
regionNorthern vs Southern SE Alaska (NSE and SSE) text
salsalinity at 3 m depth parts per thousand
stationStation code. See Acquisition Description (above). see table above
temptemperature at 3 m depth degrees Celsius
time_localtime of day local time
yearyear of sampling YYYY
yrday_locallocal day and decimal time, as 326.5 for the 326th day of the year, or November 22 at 1200 hours (noon) day of year (local)
day_localday of month, local time 1-31
lat_haullatitude at start of haul; North is positive decimal degrees
lon_haullongitude at start of haul; West is negative. decimal degrees
cruise_idcruise identification: jc=John Cobb; next two numbers = year; last 2 numbers = cruise # ('x' means cruise # is not known) text


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Instruments

Dataset-specific Instrument Name
Niskin Bottle
Generic Instrument Name
Niskin bottle
Generic Instrument Description
A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Dataset-specific Instrument Name
CTD Seabird 19
Generic Instrument Name
CTD Sea-Bird SEACAT 19
Dataset-specific Description
The CTD data were collected with a Sea-Bird1 SBE 19 Seacat profiler to 200 m or within 10 m of the bottom.
Generic Instrument Description
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

Dataset-specific Instrument Name
Radiometer
Generic Instrument Name
Radiometer
Dataset-specific Description
To quantify ambient light levels, light intensities (W* m-2) were recorded at each station with a Li-Cor Model 189 radiometer.
Generic Instrument Description
Radiometer is a generic term for a range of instruments used to measure electromagnetic radiation (radiance and irradiance) in the atmosphere or the water column. For example, this instrument category includes free-fall spectral radiometer (SPMR/SMSR System, Satlantic, Inc), profiling or deck cosine PAR units (PUV-500 and 510, Biospherical Instruments, Inc). This is a generic term used when specific type, make and model were not specified.

Dataset-specific Instrument Name
Thermosalinograph
Generic Instrument Name
Thermosalinograph
Dataset-specific Description
Surface (3-m) temperature and salinity data were collected at 1-minute intervals with an onboard thermosalinograph (Sea-Bird SBE 21).
Generic Instrument Description
A thermosalinograph (TSG) is used to obtain a continuous record of sea surface temperature and salinity. On many research vessels the TSG is integrated into the ship's underway seawater sampling system and reported with the underway or alongtrack data.


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Deployments

jc0005

Website
Platform
R/V John N. Cobb
Report
Start Date
2000-05-19
End Date
2000-05-25
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0009

Website
Platform
R/V John N. Cobb
Report
Start Date
2000-06-26
End Date
2000-07-02
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0012

Website
Platform
R/V John N. Cobb
Report
Start Date
2000-07-19
End Date
2000-07-25
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0016

Website
Platform
R/V John N. Cobb
Report
Start Date
2000-08-25
End Date
2000-08-31
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0018

Website
Platform
R/V John N. Cobb
Report
Start Date
2000-09-25
End Date
2000-10-01
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0105

Website
Platform
R/V John N. Cobb
Report
Start Date
2001-05-19
End Date
2001-05-25
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0109

Website
Platform
R/V John N. Cobb
Report
Start Date
2001-06-26
End Date
2001-07-02
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0113

Website
Platform
R/V John N. Cobb
Report
Start Date
2001-07-27
End Date
2001-08-02
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0116

Website
Platform
R/V John N. Cobb
Report
Start Date
2001-08-26
End Date
2001-09-01
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0118

Website
Platform
R/V John N. Cobb
Report
Start Date
2001-09-26
End Date
2001-10-02
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0205

Website
Platform
R/V John N. Cobb
Report
Start Date
2002-05-21
End Date
2002-05-24
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0209

Website
Platform
R/V John N. Cobb
Report
Start Date
2002-06-22
End Date
2002-06-27
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0213

Website
Platform
R/V John N. Cobb
Report
Start Date
2002-07-23
End Date
2002-07-31
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0216

Website
Platform
R/V John N. Cobb
Report
Start Date
2002-08-23
End Date
2002-08-30
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0302

Website
Platform
R/V John N. Cobb
Report
Start Date
2003-05-20
End Date
2003-05-25
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0305

Website
Platform
R/V John N. Cobb
Report
Start Date
2003-06-21
End Date
2003-06-30
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0308

Website
Platform
R/V John N. Cobb
Report
Start Date
2003-07-22
End Date
2003-07-29
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0310

Website
Platform
R/V John N. Cobb
Report
Start Date
2003-08-08
End Date
2003-08-11
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0312

Website
Platform
R/V John N. Cobb
Report
Start Date
2003-08-21
End Date
2003-08-27
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0406

Website
Platform
R/V John N. Cobb
Report
Start Date
2004-05-18
End Date
2004-05-23
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0408

Website
Platform
R/V John N. Cobb
Report
Start Date
2004-06-20
End Date
2004-06-28
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0411

Website
Platform
R/V John N. Cobb
Report
Start Date
2004-07-23
End Date
2004-07-31
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0414

Website
Platform
R/V John N. Cobb
Report
Start Date
2004-08-21
End Date
2004-08-28
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0506

Website
Platform
R/V John N. Cobb
Report
Start Date
2005-05-22
End Date
2005-05-25
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0508

Website
Platform
R/V John N. Cobb
Report
Start Date
2005-06-20
End Date
2005-07-03
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0510

Website
Platform
R/V John N. Cobb
Report
Start Date
2005-07-20
End Date
2005-08-01
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0512

Website
Platform
R/V John N. Cobb
Report
Start Date
2005-08-23
End Date
2005-08-29
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0608

Website
Platform
R/V John N. Cobb
Report
Start Date
2006-05-22
End Date
2006-05-25
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0611

Website
Platform
R/V John N. Cobb
Report
Start Date
2006-06-21
End Date
2006-07-02
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0613

Website
Platform
R/V John N. Cobb
Report
Start Date
2006-07-21
End Date
2006-07-31
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0616

Website
Platform
R/V John N. Cobb
Report
Start Date
2006-08-19
End Date
2006-08-29
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9706

Website
Platform
R/V John N. Cobb
Report
Start Date
1997-05-20
End Date
1997-05-26
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9709

Website
Platform
R/V John N. Cobb
Report
Start Date
1997-06-22
End Date
1997-06-28
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9711

Website
Platform
R/V John N. Cobb
Report
Start Date
1997-07-18
End Date
1997-07-27
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9714

Website
Platform
R/V John N. Cobb
Report
Start Date
1997-08-22
End Date
1997-08-28
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9717

Website
Platform
R/V John N. Cobb
Report
Start Date
1997-10-02
End Date
1997-10-07
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9805

Website
Platform
R/V John N. Cobb
Start Date
1998-05-14
End Date
1998-05-18
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9808

Website
Platform
R/V John N. Cobb
Report
Start Date
1998-06-24
End Date
1998-07-01
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9811

Website
Platform
R/V John N. Cobb
Report
Start Date
1998-07-20
End Date
1998-07-28
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9815

Website
Platform
R/V John N. Cobb
Report
Start Date
1998-08-24
End Date
1998-08-30
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9818

Website
Platform
R/V John N. Cobb
Report
Start Date
1998-10-05
End Date
1998-10-09
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9906

Website
Platform
R/V John N. Cobb
Report
Start Date
1999-05-20
End Date
1999-05-25
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9909

Website
Platform
R/V John N. Cobb
Report
Start Date
1999-06-26
End Date
1999-07-01
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9912

Website
Platform
R/V John N. Cobb
Report
Start Date
1999-07-24
End Date
1999-07-30
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9915

Website
Platform
R/V John N. Cobb
Report
Start Date
1999-08-20
End Date
1999-08-26
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc9918

Website
Platform
R/V John N. Cobb
Report
Start Date
1999-09-26
End Date
1999-10-02
Description
Southeast Alaska Coastal Monitoring (SECM) cruise

jc0304b

Website
Platform
R/V John N. Cobb
Report
Start Date
2003-06-12
End Date
2003-06-15
Description
Southeast Alaska Coastal Monitoring (SECM) cruise


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Project Information

U.S. GLOBEC Northeast Pacific (NEP)


Coverage: Northeast Pacific Ocean, Gulf of Alaska


Program in a Nutshell

Goal: To understand the effects of climate variability and climate change on the distribution, abundance and production of marine animals (including commercially important living marine resources) in the eastern North Pacific. To embody this understanding in diagnostic and prognostic ecosystem models, capable of capturing the ecosystem response to major climatic fluctuations.

Approach: To study the effects of past and present climate variability on the population ecology and population dynamics of marine biota and living marine resources, and to use this information as a proxy for how the ecosystems of the eastern North Pacific may respond to future global climate change. The strong temporal variability in the physical and biological signals of the NEP will be used to examine the biophysical mechanisms through which zooplankton and salmon populations respond to physical forcing and biological interactions in the coastal regions of the two gyres. Annual and interannual variability will be studied directly through long-term observations and detailed process studies; variability at longer time scales will be examined through retrospective analysis of directly measured and proxy data. Coupled biophysical models of the ecosystems of these regions will be developed and tested using the process studies and data collected from the long-term observation programs, then further tested and improved by hindcasting selected retrospective data series.



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Program Information

U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)


Coverage: Global


U.S. GLOBEC (GLOBal ocean ECosystems dynamics) is a research program organized by oceanographers and fisheries scientists to address the question of how global climate change may affect the abundance and production of animals in the sea.

The U.S. GLOBEC Program currently had major research efforts underway in the Georges Bank / Northwest Atlantic Region, and the Northeast Pacific (with components in the California Current and in the Coastal Gulf of Alaska). U.S. GLOBEC was a major contributor to International GLOBEC efforts in the Southern Ocean and Western Antarctic Peninsula (WAP).



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Funding

Funding SourceAward
National Oceanic and Atmospheric Administration (NOAA)
National Science Foundation (NSF)

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