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Zooplankton abundance and biomass from MOCNESS silhouettes, from the RVIB Nathaniel B. Palmer NBP0103, NBP0104 from the Southern Ocean, 2001-2002 (SOGLOBEC project, Southern Ocean Krill project) (NCEI Accession 0112172)

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This dataset contains biological and survey - biological data collected on RVIB Nathaniel B. Palmer during cruises NBP0103 and NBP0104 in the South Atlantic Ocean, South Pacific Ocean, and Southern Ocean from 2001-04-29 to 2002-09-11. These data include abundance, biomass, depth_close, depth_open, and taxon. The instruments used to collect these data include MOCNESS1. These data were collected by Dr Carin J. Ashjian and Dr Peter H. Wiebe of Woods Hole Oceanographic Institution as part of the "GLOBEC: Winter Distribution and Success of Southern Ocean Krill (Southern Ocean Krill)" and "U.S. GLOBEC Southern Ocean (SOGLOBEC)" projects and "U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)" program. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2019-02-06.

The following is the text of the dataset description provided by BCO-DMO:

Zooplankton abundance + biomass from silhouettes, MOC nets, NBPalmer

Dataset Description:
Zooplankton abundance and biomass from MOCNESS nets using silhouette analysis NB Palmer, austral fall & winter of 2001 & 2002

Cruises:
Nathaniel B. Palmer, April-June 2001 (NBP01-03), 24 tows
Nathaniel B. Palmer, July-Sept. 2001 (NBP01-04), 17 tows
Nathaniel B. Palmer, April-May 2002 (NBP02-02), 24 tows
Nathaniel B. Palmer, July-Sept. 2002 (NBP02-04), 19 tows

Related Datasets:
Zooplankton biovolume values from MOCNESS tows - this data set is derived from displacement volume measurements and dry weight conversion calculations from the same set of samples as the above data. https://www.bco-dmo.org/dataset/2372

Zooplankton Abundance Based on Taxa and Life Stages or Size - these abundance values on the same tows were derived by counting and identifying a subset of the zooplankton to the species and life stage for euphausiids and dominant copepods and to taxonomic group with broad size categories for other zooplankton (pteropod, chaetognath, polychaete, etc.). https://www.bco-dmo.org/dataset/2387
  • Cite as: Ashjian, Carin J.; Wiebe, Peter H. (2013). Zooplankton abundance and biomass from MOCNESS silhouettes, from the RVIB Nathaniel B. Palmer NBP0103, NBP0104 from the Southern Ocean, 2001-2002 (SOGLOBEC project, Southern Ocean Krill project) (NCEI Accession 0112172). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0112172. Accessed [date].
gov.noaa.nodc:0112172
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Distributor NOAA National Centers for Environmental Information
+1-301-713-3277
NCEI.Info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Time Period 2001-04-29 to 2002-09-11
Spatial Bounding Box Coordinates
West: -75.732
East: -65.529
South: -69.243
North: -65.147
Spatial Coverage Map
General Documentation
Associated Resources
  • Biological, chemical, physical, biogeochemical, ecological, environmental and other data collected from around the world during historical and contemporary periods of biological and chemical oceanographic exploration and research managed and submitted by the Biological and Chemical Oceanography Data Management Office (BCO-DMO)
    • NCEI Collection
      Navigate directly to the URL for data access and direct download.
  • Ashjian, C., Wiebe, P. (2009) Zooplankton abundance and biomass from MOCNESS silhouettes, from the RVIB Nathaniel B. Palmer NBP0103, NBP0104 from the Southern Ocean, 2001-2002 (SOGLOBEC project, Southern Ocean Krill project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). Dataset version 2009-08-27. https://doi.org/10.1575/1912/bco-dmo.2389.1
  • Parent ID (indicates this dataset is related to other data):
    • gov.noaa.nodc:BCO-DMO
Publication Dates
  • publication: 2013-08-19
  • revision: 2023-05-04
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete - production of the data has been completed
Historical archive - data has been stored in an offline storage facility
Data Update Frequency As needed
Supplemental Information
Acquisition Description:
The MOCNESS-1 plankton sampler has nine rectangular nets (1m x 1.4 m) with a mesh size of 0.333 mm, which are opened and closed sequentially by commands through conducting cable from the surface (Wiebe et al. , 1976).

Biomass (wet weight) and abundance were determined principally by silhouette digitization of taxa lengths and conversion to equivalent wet weights according to the equations and methods adapted from Davis and Wiebe (1985) and Wiebe et al. (2004). New formulas were calculated for Southern Ocean krill because the length-weight relationship (Wet Weight = 0.0054*Length 3.214 ) differed from that of the North Atlantic euphausiids (Wet Weight = 0.0138*Length 3.071 ; Davis and Wiebe, 1985).

MOCNESS Sample Analysis (from Ashjian et al., 2004)

Silhouette photographs first were obtained from each sample; this photograph then was scanned with an Epson Expression 1600 scanner at 1200 dpi to produce a Tagged Image File Format (TIF) image. Identification and measurement of organisms from the tiff image were accomplished manually using the specialized MATLAB (Mathworks, Inc.) routine, the WHOI Silhouette DIGITIZER (v 1.0) (Little and Copley, 2003). A scanned photographic image of an aliquot of a sample was displayed with a superimposed reference grid on the computer screen. The operator identified each organism to taxonomic and/or size category by selecting the appropriate category button. Organism lengths (both straight and curved) then were measured by the operator using the cursor on the computer screen. Although the nominal resolution of the measurement is 0.02 mm, in practice the resolution was ~0.05 mm. In instances where there were too many organisms of a given type to justify measuring every individual organism, the DIGITIZER routine generated a list of randomly located cells to systematically sub-sample the overall image. Each organism's biomass was calculated automatically from its length measurement using the appropriate length-weight relationship.

This is a graph of the vertical distribution of biomass from the Winter 2001 Cruise, NBP0103. Net 8 is closest to the surface and net 1 is deepest:

This is a graph of the vertical distribution of biomass from the Winter 2001 Cruise, NBP0104:

Figure 1. Map of Tow locations, Fall and Winter, 2001

Table 1. Summary of locations, times, and depths for the twelve net tows.
( Note: Winter tows 14 and 15 were considered one tow because when ice and malfunction led to no data in the top three nets of Tow 14, MOC Tow 15 was fished in the upper 90 meters to compensate.)

Cruise Region Tow
Number Date Time
(Local) Light* Lat(S) Lon(W) Tow Depth(m) Bottom Depth(m) Ice Cover
(tenths)
Fall Offshore 6 05/04/01 1332 D 66 40.17 73 22.08 0-1001 3650 0
Midshelf 1 1 04/30/01 2050 N 66 10.80 69 10.47 0-306 360 0
Midshelf 2 3 05/02/01 0320 N 66 48.53 70 21.42 0-348 600 0
Midshelf 3 12 05/13/01 1830 N 68 23.62 72 18.44 0-356 400 0
Midshelf 4 16 05/18/01 0854 N 68 59.43 74 55.77 0-340 350 0
Marguerite Bay 24 05/29/01 0300 N 67 55.33 68 30.69 0-602 690 0
Winter Offshore 11 08/11/01 0918 T 67 14.69 74 25.27 0-989 2917 10
Midshelf 1 17 08/26/01 0306 N 66 11.13 69 06.21 7-305 346 6
Midshelf 2 4 07/31/01 0949 D 66 45.18 70 09.64 11-413 501 8
Midshelf 3 13 08/17/01 2117 N 68 13.21 72 56.53 0-230 325 10
Midshelf 4 14 08/21/01 1136 D 69 15.55 75 34.00 20-290 ~340 7
15 08/22/01 0327 N 69 12.30 75 43.90 0-91 ~350 9
Marguerite Bay 9 08/08/01 0215 N 67 53.74 68 10.82 0-488 600+ 9

* Light conditions are designated as:
"D" = day, sunlight present;
"N" = night, darkness;
"T" = twilight

In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number.
Purpose This dataset is available to the public for a wide variety of uses including scientific research and analysis.
Use Limitations
  • accessLevel: Public
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Dataset Citation
  • Cite as: Ashjian, Carin J.; Wiebe, Peter H. (2013). Zooplankton abundance and biomass from MOCNESS silhouettes, from the RVIB Nathaniel B. Palmer NBP0103, NBP0104 from the Southern Ocean, 2001-2002 (SOGLOBEC project, Southern Ocean Krill project) (NCEI Accession 0112172). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0112172. Accessed [date].
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Acknowledgments
  • Funding provided by NSF Antarctic Sciences (NSF ANT) Award Number: ANT-9910307 Award URL: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=9910307
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
BCO-DMO Standard Parameters Global Change Master Directory (GCMD) Science Keywords Originator Parameter Names
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords
Platform keywords NODC PLATFORM NAMES THESAURUS BCO-DMO Platform Names Global Change Master Directory (GCMD) Platform Keywords ICES/SeaDataNet Ship Codes
Instrument keywords NODC INSTRUMENT TYPES THESAURUS BCO-DMO Standard Instruments Global Change Master Directory (GCMD) Instrument Keywords Originator Instrument Names
Place keywords NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords Provider Place Names
Project keywords NODC PROJECT NAMES THESAURUS BCO-DMO Standard Programs BCO-DMO Standard Projects Global Change Master Directory (GCMD) Project Keywords Provider Cruise IDs Provider Funding Award Information
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Ashjian, Carin J.; Wiebe, Peter H. (2013). Zooplankton abundance and biomass from MOCNESS silhouettes, from the RVIB Nathaniel B. Palmer NBP0103, NBP0104 from the Southern Ocean, 2001-2002 (SOGLOBEC project, Southern Ocean Krill project) (NCEI Accession 0112172). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0112172. Accessed [date].
Data License
Access Constraints
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
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  • In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: dataset
Processing Steps
  • 2013-08-19T19:23:07Z - NCEI Accession 0112172 v1.1 was published.
  • 2023-05-04T07:05:19Z - NCEI Accession 0112172 was revised and v2.2 was published.
    Rationale: Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession.
Output Datasets
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Acquisition Information (collection)
Instrument
  • Multiple Opening/Closing Net and Environmental Sensing System (MOCNESS)
Platform
  • RV Nathaniel B. Palmer
Last Modified: 2023-07-24T15:32:27Z
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