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     data   graph     files  public 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)
   ?     I   M   background (external link) RSS Subscribe BCO-DMO bcodmo_dataset_2389

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson
attribute NC_GLOBAL acquisition_description String 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*Length3.214)
differed from that of the North Atlantic euphausiids (Wet Weight =
0.0138*Length3.071; Davis and Wiebe, 1985).

MOCNESS Sample Analysis\u00a0(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
\t\t\tNumber | Date | Time
\t\t\t(Local) | Light* | Lat(S) | Lon(W) | Tow Depth(m) | Bottom
Depth(m) | Ice Cover
\t\t\t(tenths)
---|---|---|---|---|---|---|---|---|---|---
Fall | Offshore | 6 | 05/04/01 | 1332 | D | 66\u00a0 40.17 | 73
22.08 | 0-1001 | 3650 | 0
\u00a0 | Midshelf 1 | 1 | 04/30/01 | 2050 | N | 66 10.80 | 69 10.47 |
0-306 | 360 | 0
\u00a0 | Midshelf 2 | 3 | 05/02/01 | 0320 | N | 66 48.53 | 70 21.42 |
0-348 | 600 | 0
\u00a0 | Midshelf 3 | 12 | 05/13/01 | 1830 | N | 68\u00a0 23.62 | 72
18.44 | 0-356 | 400 | 0
\u00a0 | Midshelf 4 | 16 | 05/18/01 | 0854 | N | 68\u00a0 59.43 | 74
55.77 | 0-340 | 350 | 0
\u00a0 | 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
\u00a0 | Midshelf 1 | 17 | 08/26/01 | 0306 | N | 66 11.13 | 69 06.21 |
7-305 | 346 | 6
\u00a0 | Midshelf 2 | 4 | 07/31/01 | 0949 | D | 66 45.18 | 70 09.64 |
11-413 | 501 | 8
\u00a0 | Midshelf 3 | 13 | 08/17/01 | 2117 | N | 68 13.21 | 72 56.53 |
0-230 | 325 | 10
\u00a0 | Midshelf 4 | 14 | 08/21/01 | 1136 | D | 69 15.55 | 75 34.00 |
20-290 | ~340 | 7
\u00a0 | \u00a0 | 15 | 08/22/01 | 0327 | N | 69 12.30 | 75\u00a0
43.90 | 0-91 | ~350 | 9
\u00a0 | 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
attribute NC_GLOBAL awards_0_award_nid String 54773
attribute NC_GLOBAL awards_0_award_number String ANT-9910307
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=9910307 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Antarctic Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF ANT
attribute NC_GLOBAL awards_0_funding_source_nid String 369
attribute NC_GLOBAL awards_0_program_manager String Dr Roberta Marinelli
attribute NC_GLOBAL awards_0_program_manager_nid String 51469
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Zooplankton Biomass and Abundance from MOCNESS tows
using silhouette analysis.
C. Ashjian and N. Copley, SIs
note: see Documentation for maps of tow locations, other important
data and supporting information
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3 19 Dec 2019
attribute NC_GLOBAL date_created String 2010-06-16T20:40:39Z
attribute NC_GLOBAL date_modified String 2019-02-06T18:43:14Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.2389.1
attribute NC_GLOBAL Easternmost_Easting double -65.5287
attribute NC_GLOBAL geospatial_lat_max double -65.1467
attribute NC_GLOBAL geospatial_lat_min double -69.243
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -65.5287
attribute NC_GLOBAL geospatial_lon_min double -75.7317
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 800.0
attribute NC_GLOBAL geospatial_vertical_min double 0.0
attribute NC_GLOBAL geospatial_vertical_positive String down
attribute NC_GLOBAL geospatial_vertical_units String m
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/2389 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String MOC1
attribute NC_GLOBAL instruments_0_dataset_instrument_description String 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).
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 4151
attribute NC_GLOBAL instruments_0_description String The Multiple Opening/Closing Net and Environmental Sensing System or MOCNESS is a family of net systems based on the Tucker Trawl principle. The MOCNESS-1 carries nine 1-m2 nets usually of 335 micrometer mesh and is intended for use with the macrozooplankton. All nets are black to reduce contrast with the background. A motor/toggle release assembly is mounted on the top portion of the frame and stainless steel cables with swaged fittings are used to attach the net bar to the toggle release. A stepping motor in a pressure compensated case filled with oil turns the escapement crankshaft of the toggle release which sequentially releases the nets to an open then closed position on command from the surface. -- from the MOCNESS Operations Manual (1999 + 2003).
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L22/current/NETT0097/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String MOCNESS1
attribute NC_GLOBAL instruments_0_instrument_nid String 437
attribute NC_GLOBAL instruments_0_supplied_name String MOCNESS1
attribute NC_GLOBAL keywords String abundance, abundance_total, bco, bco-dmo, biological, biomass, biomass_total, chemical, cruiseid, data, dataset, depth, depth_close, depth_mid, depth_open, depth_w, dmo, erddap, latitude, longitude, management, net, oceanography, office, preliminary, taxon, total, tow, year
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/2389/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/2389 (external link)
attribute NC_GLOBAL Northernmost_Northing double -65.1467
attribute NC_GLOBAL param_mapping String {'2389': {'lat': 'master - latitude', 'lon': 'master - longitude', 'depth_close': 'flag - depth'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/2389/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_0_affiliation_acronym String WHOI
attribute NC_GLOBAL people_0_person_name String Carin J. Ashjian
attribute NC_GLOBAL people_0_person_nid String 50381
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_1_affiliation_acronym String WHOI
attribute NC_GLOBAL people_1_person_name String Peter H. Wiebe
attribute NC_GLOBAL people_1_person_nid String 50454
attribute NC_GLOBAL people_1_role String Principal Investigator
attribute NC_GLOBAL people_1_role_type String originator
attribute NC_GLOBAL people_2_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_2_affiliation_acronym String WHOI
attribute NC_GLOBAL people_2_person_name String Nancy Copley
attribute NC_GLOBAL people_2_person_nid String 50396
attribute NC_GLOBAL people_2_role String Technician
attribute NC_GLOBAL people_2_role_type String related
attribute NC_GLOBAL people_3_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_3_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_3_person_name String Nancy Copley
attribute NC_GLOBAL people_3_person_nid String 50396
attribute NC_GLOBAL people_3_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_3_role_type String related
attribute NC_GLOBAL project String SOGLOBEC,Southern Ocean Krill
attribute NC_GLOBAL projects_0_acronym String SOGLOBEC
attribute NC_GLOBAL projects_0_description String The fundamental objectives of United States Global Ocean Ecosystems Dynamics (U.S. GLOBEC) Program are dependent upon the cooperation of scientists from several disciplines. Physicists, biologists, and chemists must make use of data collected during U.S. GLOBEC field programs to further our understanding of the interplay of physics, biology, and chemistry. Our objectives require quantitative analysis of interdisciplinary data sets and, therefore, data must be exchanged between researchers. To extract the full scientific value, data must be made available to the scientific community on a timely basis.
attribute NC_GLOBAL projects_0_geolocation String Southern Ocean
attribute NC_GLOBAL projects_0_name String U.S. GLOBEC Southern Ocean
attribute NC_GLOBAL projects_0_project_nid String 2039
attribute NC_GLOBAL projects_0_project_website String http://www.ccpo.odu.edu/Research/globec_menu.html (external link)
attribute NC_GLOBAL projects_0_start_date String 2001-01
attribute NC_GLOBAL projects_1_acronym String Southern Ocean Krill
attribute NC_GLOBAL projects_1_description String The U.S. Global Ocean Ecosystems Dynamics (U.S. GLOBEC) program has the goal of understanding and ultimately predicting how populations of marine animal species respond to natural and anthropogenic changes in climate. Research in the Southern Ocean (SO) indicates strong coupling between climatic processes and ecosystem dynamics via the annual formation and destruction of sea ice. The Southern Ocean GLOBEC Program (SO GLOBEC) will investigate the dynamic relationship between physical processes and ecosystem responses through identification of critical parameters that affect the distribution, abundance and population dynamics of target species. The overall goals of the SO GLOBEC program are to elucidate shelf circulation processes and their effect on sea ice formation and krill distribution, and to examine the factors which govern krill survivorship and availability to higher trophic levels, including penguins, seals and whales. The focus of the U.S. contribution to the international SO GLOBEC program will be on winter processes. This component will focus on juvenile and adult krill and mesozooplankton prey distribution and abundance using a sophisticated instrument package, BIOMAPPER II, which is equipped with an acoustic backscatter sonar system, a video plankton recorder and an environmental sensor system. The system is used in large-scale studies. Additionally, a remotely-operative vehicle will be used to map the distribution and behavior of krill under ice. The result of the integrated SO GLOBEC program will be to improve the predictability of living marine resources, especially with respect to local and global climatic shifts.
attribute NC_GLOBAL projects_1_end_date String 2005-09
attribute NC_GLOBAL projects_1_geolocation String Southern Ocean
attribute NC_GLOBAL projects_1_name String GLOBEC: Winter Distribution and Success of Southern Ocean Krill
attribute NC_GLOBAL projects_1_project_nid String 616193
attribute NC_GLOBAL projects_1_start_date String 2000-10
attribute NC_GLOBAL publisher_name String Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double -69.243
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String Zooplankton abundance and biomass from MOCNESS silhouettes, from the RVIB Nathaniel B. Palmer NBP0103, NBP0104 from the Southern Ocean, austral fall and winter, 2001-2002
attribute NC_GLOBAL title String 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)
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -75.7317
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable cruiseid   String  
attribute cruiseid bcodmo_name String cruiseid
attribute cruiseid description String Cruise Identifier (e.g., LMG0103, NPB0104)
attribute cruiseid long_name String Cruiseid
variable year   short  
attribute year _FillValue short 32767
attribute year actual_range short 2001, 2002
attribute year bcodmo_name String year
attribute year description String year of cruise
attribute year long_name String Year
attribute year nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/YEARXXXX/ (external link)
variable tow   byte  
attribute tow _FillValue byte 127
attribute tow actual_range byte 1, 24
attribute tow bcodmo_name String tow
attribute tow description String tow number
attribute tow long_name String Tow
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double -69.243, -65.1467
attribute latitude axis String Y
attribute latitude bcodmo_name String latitude
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude description String latitude, negative = South
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LATX/ (external link)
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable longitude   double  
attribute longitude _CoordinateAxisType String Lon
attribute longitude _FillValue double NaN
attribute longitude actual_range double -75.7317, -65.5287
attribute longitude axis String X
attribute longitude bcodmo_name String longitude
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude description String longitude, negative = West
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LONX/ (external link)
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable depth_w   short  
attribute depth_w _FillValue short 32767
attribute depth_w actual_range short 242, 3650
attribute depth_w bcodmo_name String depth_w
attribute depth_w colorBarMaximum double 8000.0
attribute depth_w colorBarMinimum double -8000.0
attribute depth_w colorBarPalette String TopographyDepth
attribute depth_w description String depth of water at the start of tow
attribute depth_w long_name String Depth
attribute depth_w standard_name String depth
attribute depth_w units String meters
variable net   byte  
attribute net _FillValue byte 127
attribute net actual_range byte 1, 8
attribute net bcodmo_name String net
attribute net description String net number (0-8)
attribute net long_name String Net
variable depth_open   short  
attribute depth_open _FillValue short 32767
attribute depth_open actual_range short 20, 1000
attribute depth_open bcodmo_name String depth_open
attribute depth_open colorBarMaximum double 8000.0
attribute depth_open colorBarMinimum double -8000.0
attribute depth_open colorBarPalette String TopographyDepth
attribute depth_open description String depth where net is opened
attribute depth_open long_name String Depth
attribute depth_open standard_name String depth
attribute depth_open units String meters
variable depth   double  
attribute depth _CoordinateAxisType String Height
attribute depth _CoordinateZisPositive String down
attribute depth _FillValue double NaN
attribute depth actual_range double 0.0, 800.0
attribute depth axis String Z
attribute depth bcodmo_name String depth_close
attribute depth colorBarMaximum double 8000.0
attribute depth colorBarMinimum double -8000.0
attribute depth colorBarPalette String TopographyDepth
attribute depth description String depth where net is closed
attribute depth ioos_category String Location
attribute depth long_name String Depth
attribute depth positive String down
attribute depth standard_name String depth
attribute depth units String m
variable depth_mid   float  
attribute depth_mid _FillValue float NaN
attribute depth_mid actual_range float 10.0, 900.0
attribute depth_mid bcodmo_name String depth_mid
attribute depth_mid colorBarMaximum double 8000.0
attribute depth_mid colorBarMinimum double -8000.0
attribute depth_mid colorBarPalette String TopographyDepth
attribute depth_mid description String mid-depth of tow
attribute depth_mid long_name String Depth
attribute depth_mid standard_name String depth
attribute depth_mid units String meters
variable abundance_total   float  
attribute abundance_total _FillValue float NaN
attribute abundance_total actual_range float 0.4561, 5164.0
attribute abundance_total bcodmo_name String abundance
attribute abundance_total description String total number of all taxa counted
attribute abundance_total long_name String Abundance Total
attribute abundance_total nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/B070/ (external link)
attribute abundance_total units String no. per cubic meter per net
variable biomass_total   String  
attribute biomass_total bcodmo_name String biomass_total
attribute biomass_total description String total wet weight of zooplankton in net
attribute biomass_total long_name String Biomass Total
attribute biomass_total units String milligrams per meter3
variable taxon   String  
attribute taxon bcodmo_name String taxon
attribute taxon description String scientific name or common name of organism or group
attribute taxon long_name String Taxon
variable abundance   float  
attribute abundance _FillValue float NaN
attribute abundance actual_range float 0.0, 1840.0
attribute abundance bcodmo_name String unknown
attribute abundance description String number of the specific taxa counted
attribute abundance long_name String Abundance
attribute abundance units String no. per meter3pernet
variable biomass   String  
attribute biomass bcodmo_name String biomass
attribute biomass description String wet weight of the specific taxa in the net
attribute biomass long_name String Biomass
attribute biomass units String milligrams per meter3

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.


 
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