Bongo displacement volume data from R/V Albatross IV, R/V Endeavor, and R/V Oceanus during U.S. GLOBEC Georges Bank broadscale cruises to Georges Bank and the Gulf of Maine in 1995-1999 (GB project)

Website: https://www.bco-dmo.org/dataset/2391
Data Type: Cruise Results
Version: 1
Version Date: 2002-11-06

Project
» U.S. GLOBEC Georges Bank (GB)

Program
» U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)
ContributorsAffiliationRole
Green, JohnNational Marine Fisheries Service (NMFS)Co-Principal Investigator
Mountain, DavidNational Marine Fisheries Service (NMFS)Co-Principal Investigator
Allison, DickyWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Abstract
Bongo displacement volume data from R/V Albatross IV, R/V Endeavor, and R/V Oceanus during U.S. GLOBEC Georges Bank broadscale cruises to Georges Bank and the Gulf of Maine in 1995-1999 (GB project)


Coverage

Spatial Extent: N:42.34 E:-65.66 S:40.23 W:-69.14
Temporal Extent: 1995-02-11 - 1999-06-23

Dataset Description

BioVolume Data from Bongo Tows during Broadscale Cruises, 1995-1999
Dave Mountain, Jack Green and Joe Kane, NMFS

This displacement volume data comes from one net with a mesh size of 333 um.

 


Acquisition Description

This displacement volume data comes from one net with a mesh size of 333 um.


Processing Description

column header meaning units
raw_vol raw volume cc
displ_vol displacement volume cc/100m3
haul_factor haul factor 100/volume filtered (m3)

displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor


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Parameters

ParameterDescriptionUnits
raw_volraw volume cc
displ_voldisplacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor. Displacement volume is the volume of animals per 100 cubic meters of seawater. cc per 100m3 water
haul_factorhaul factor. A standard haul factor (SHF) was calculated for each Bongo net tow to make them comparable and to allow estimation of areal abundance. The SHF is calculated by the formula: SHF = 10D/V where D = depth of haul = cosine of the average angle of stray of the towing cable multiplied by cable length (m) V = total volume of water (m3) strained during the haul. V = R * a * p where R = total number of revolutions of the current meter during the haul a = area (m2) of the mouth of the net p = length of the column of water needed produce one revolution of the current meter 100/volume filtered (m3)
cruiseidcruise identifier e.g. AL9505 is RV/Albatross-9505
yearyear of sampling. format: yyyy unitless
castcast number integer
stationstation number integer
station_stdstandard station number integer
day_localday of month in local time 1-31
month_localmonth in local time 1-12
time_locallocal time HHmm
latlatitude: North is positive and negative denotes South decimal degrees
lonlongtude: East is positive and negative denotes West decimal degrees
depth_wdepth of the water cubic meters
depthdepth of the sample meters
regioncode for region of NW Atlantic: GBK= Georges Bank; GOM=Gulf of Maine; SNE=Southern New England; SSH=Slope/Shelf; UNK=unknown text
yrday_locallocal day and decimal time: as 326.5 for the 326th day of the year or November 22 at 1200 hours (noon)


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Instruments

Dataset-specific Instrument Name
Bongo Nets
Generic Instrument Name
Bongo Net
Dataset-specific Description
Bongo net with a mesh size of 333 um.
Generic Instrument Description
A Bongo Net consists of paired plankton nets, typically with a 60 cm diameter mouth opening and varying mesh sizes, 10 to 1000 micron. The Bongo Frame was designed by the National Marine Fisheries Service for use in the MARMAP program. It consists of two cylindrical collars connected with a yoke so that replicate samples are collected at the same time. Variations in models are designed for either vertical hauls (OI-2500 = NMFS Pairovet-Style, MARMAP Bongo, CalVET) or both oblique and vertical hauls (Aquatic Research). The OI-1200 has an opening and closing mechanism that allows discrete "known-depth" sampling. This model is large enough to filter water at the rate of 47.5 m3/minute when towing at a speed of two knots. More information: Ocean Instruments, Aquatic Research, Sea-Gear


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Deployments

AL9505

Website
Platform
R/V Albatross IV
Report
Start Date
1995-05-09
End Date
1995-05-18
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

AL9506

Website
Platform
R/V Albatross IV
Report
Start Date
1995-06-05
End Date
1995-06-15
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

AL9508

Website
Platform
R/V Albatross IV
Report
Start Date
1995-07-10
End Date
1995-07-20
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

AL9605

Website
Platform
R/V Albatross IV
Report
Start Date
1996-05-06
End Date
1996-05-17
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

AL9607

Website
Platform
R/V Albatross IV
Report
Start Date
1996-06-03
End Date
1996-06-13
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

AL9701

Website
Platform
R/V Albatross IV
Report
Start Date
1997-01-13
End Date
1997-01-20
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

AL9705

Website
Platform
R/V Albatross IV
Report
Start Date
1997-05-19
End Date
1997-05-27
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

AL9707

Website
Platform
R/V Albatross IV
Report
Start Date
1997-06-18
End Date
1997-06-28
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

AL9801

Website
Platform
R/V Albatross IV
Report
Start Date
1998-01-07
End Date
1998-01-19
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

AL9806

Website
Platform
R/V Albatross IV
Report
Start Date
1998-05-13
End Date
1998-05-22
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

AL9808

Website
Platform
R/V Albatross IV
Report
Start Date
1998-06-16
End Date
1998-06-26
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

AL9901

Website
Platform
R/V Albatross IV
Report
Start Date
1999-01-12
End Date
1999-01-24
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

AL9904

Website
Platform
R/V Albatross IV
Start Date
1999-05-19
End Date
1999-05-27
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

AL9906

Website
Platform
R/V Albatross IV
Report
Start Date
1999-06-14
End Date
1999-06-24
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

EN261

Website
Platform
R/V Endeavor
Start Date
1995-02-10
End Date
1995-02-20
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

EN263

Website
Platform
R/V Endeavor
Report
Start Date
1995-03-13
End Date
1995-03-24
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

EN265

Website
Platform
R/V Endeavor
Start Date
1995-04-11
End Date
1995-04-22
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

EN276

Website
Platform
R/V Endeavor
Report
Start Date
1996-01-10
End Date
1996-01-22
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

EN278

Website
Platform
R/V Endeavor
Start Date
1996-02-13
End Date
1996-02-25
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

EN282

Website
Platform
R/V Endeavor
Start Date
1996-04-08
End Date
1996-04-20
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

EN320

Website
Platform
R/V Endeavor
Report
Start Date
1999-03-10
End Date
1999-03-23
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

OC275

Website
Platform
R/V Oceanus
Start Date
1996-03-11
End Date
1996-03-22
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

OC298

Website
Platform
R/V Oceanus
Report
Start Date
1997-02-11
End Date
1997-02-23
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

OC300

Website
Platform
R/V Oceanus
Report
Start Date
1997-03-16
End Date
1997-03-28
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

OC302

Website
Platform
R/V Oceanus
Report
Start Date
1997-04-22
End Date
1997-05-02
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

OC317

Website
Platform
R/V Oceanus
Start Date
1998-02-06
End Date
1998-02-19
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

OC319

Website
Platform
R/V Oceanus
Report
Start Date
1998-03-15
End Date
1998-03-27
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

OC322

Website
Platform
R/V Oceanus
Report
Start Date
1998-04-15
End Date
1998-04-27
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

OC336

Website
Platform
R/V Oceanus
Report
Start Date
1999-02-11
End Date
1999-02-23
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor

OC341

Website
Platform
R/V Oceanus
Report
Start Date
1999-04-16
End Date
1999-04-27
Description
broad-scale

Acquisition Description
This displacement volume data comes from one net with a mesh size of 333 um.

Processing Description
column header meaning units raw_vol raw volume cc displ_vol displacement volume cc/100m3 haul_factor haul factor 100/volume filtered (m3) displacement volume is a normalized displacement volume and is calculated: raw_vol * haul_factor


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Project Information

U.S. GLOBEC Georges Bank (GB)


Coverage: Georges Bank, Gulf of Maine, Northwest Atlantic Ocean


The U.S. GLOBEC Georges Bank Program is a large multi- disciplinary multi-year oceanographic effort. The proximate goal is to understand the population dynamics of key species on the Bank - Cod, Haddock, and two species of zooplankton (Calanus finmarchicus and Pseudocalanus) - in terms of their coupling to the physical environment and in terms of their predators and prey. The ultimate goal is to be able to predict changes in the distribution and abundance of these species as a result of changes in their physical and biotic environment as well as to anticipate how their populations might respond to climate change.

The effort is substantial, requiring broad-scale surveys of the entire Bank, and process studies which focus both on the links between the target species and their physical environment, and the determination of fundamental aspects of these species' life history (birth rates, growth rates, death rates, etc).

Equally important are the modelling efforts that are ongoing which seek to provide realistic predictions of the flow field and which utilize the life history information to produce an integrated view of the dynamics of the populations.

The U.S. GLOBEC Georges Bank Executive Committee (EXCO) provides program leadership and effective communication with the funding agencies.



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

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