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     data   graph     files  public AK-LTOP MOCNESS tow zooplankton abundance and biomass from R/V Alpha Helix, R/V Wecoma
multiple cruises in the Northeast Pacific from 1997-2004 (NEP project)
   ?     I   M   background (external link) RSS Subscribe BCO-DMO bcodmo_dataset_3111

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 GLOBEC 2000: Gulf of Alaska Long-Term Observation Program
T. Weingartner, L. Haldorson, R. Hopcroft, K. Coyle, T. E. Whitledge (all at
University of Alaska, Fairbanks), T. Royer (Old Dominion University)

This project is to conduct the Gulf of Alaska Long-Term Observation Program
(GOA-LTOP) as part of Phase II of the Northeast Pacific (NEP) GLOBEC program.
The GOA shelf supports a rich ecosystem that includes many commercially
important fisheries. The basis for this productivity is enigmatic for the GOA
shelf is deep, forced by downwelling-favorable winds, and fed by a massive
nutrient-poor coastal freshwater discharge. Both the winds and the freshwater
discharge are intimately linked to the strength and position of the Aleutian
Low. The GOA ecosystem experiences substantial physical and biological changes
on decadal and interannual time scales. Although some of these changes are
correlated with various climatic indices a mechanistic understanding of
climate change and ecosystem response is unavailable. The generic goal of this
LTOP is to understand and quantify temporal (seasonal and interannual) and
spatial (cross- and along-shelf) variations in the thermohaline, chemical, and
biological properties and relationships of this shelf. Our proposal supports
GLOBEC goals that will help: 1) retrospective studies interpret historical
data, 2) design a cost-effective long-term monitoring program, 3) provide the
seasonal and interannual context for concurrent mesoscale and process studies,
and 4) provide boundary conditions and data sets for model evaluation. This
5-year project entails 4 field years and a fifth year for data analyses and
synthesis. The field effort involves seven, 9-day interdisciplinary
cruises/year in the northern GOA. The study area encompasses the 220-km long,
Seward Line (sampled in the 1970s) that extends across the shelf and slope and
high resolution sampling of the Alaska Coastal Current (ACC), upstream,
downstream, and within Prince William Sound. The ACC is an important shelf
habitat for yoy salmon migrating from nursery areas in the sound and into the
GOA. The sampling effort (Table A) is year-round and motivated by seasonally
significant physical and biological events affecting yoy pink salmon.

Table A. Sampling schedule and rationale for GOA-LTOP. (Key for Winds,
Discharge and Stratification: S=strong; M=moderate; W=weak; D=downwelling
winds; U=upwelling winds; V=variable; L=low; H=high) Deep water moves onshore
during the July-August upwelling period.
Month | Sampling | Physical Rationale | Biological Rationale
---|---|---|---
CTD | Nutrients | Zoo | Fish | Winds | Disch | Strat
March | X | X | X | \u00a0 | D S | L | W | Zooplankton migrate from
depth (at shelfbreak); transported inshore.
April | X | X | X | \u00a0 | D M | L-M | W V | Phytoplankton bloom
May | X | X | X | \u00a0 | D M-W | M | M V | Maximum oceanic copepod
biomass.
July | X | X | X | X | D/U W | M-H | S | Maximum zooplankton
abundance; YOY salmon enter shelf.
August | X | X | X | X | D/U W | M-H | S | Maximum YOY salmon
abundance on shelf.
October | X | X | X | X | D S | H | H | YOY salmon on shelf.
December | X | X | X | \u00a0 | D S | M | M | Fall-winter pre-
conditioning for spring nutrients, small zooplankton.
The sampling protocol followed GLOBEC guidelines and used gear types and
techniques similar to those in the Oregon LTOP that was also a part of the
NEP-GLOBEC program. Most of the research was conducted from the R/V Alpha
Helix. Fish sampling was done from a chartered trawler in July, August, and
October. Both vessels worked together during these cruises so that the fishing
charter could verify fish targets detected on the acoustics array towed from
the Alpha Helix.

This information was last updated on September 22, 2000.
\u00a0
attribute NC_GLOBAL awards_0_award_nid String 54767
attribute NC_GLOBAL awards_0_award_number String OCE-0109078
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0109078 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String Phillip R. Taylor
attribute NC_GLOBAL awards_0_program_manager_nid String 50451
attribute NC_GLOBAL awards_1_award_nid String 55044
attribute NC_GLOBAL awards_1_award_number String unknown NEP NOAA
attribute NC_GLOBAL awards_1_funder_name String National Oceanic and Atmospheric Administration
attribute NC_GLOBAL awards_1_funding_acronym String NOAA
attribute NC_GLOBAL awards_1_funding_source_nid String 352
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String MOCNESS Plankton abundance and biomass
CGOA 1998 - 2004, revised (3/2009)
P.I. - Ken Coyle
all tows with MOC-1m^2, 5 mm mesh nets, and obliquely hauled
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 2020-01-20T18:24:17Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.3111.1
attribute NC_GLOBAL Easternmost_Easting double -144.1596
attribute NC_GLOBAL geospatial_lat_max double 60.7973
attribute NC_GLOBAL geospatial_lat_min double 58.046
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -144.1596
attribute NC_GLOBAL geospatial_lon_min double -149.4913
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 612.0
attribute NC_GLOBAL geospatial_vertical_min double 1.0
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/3111 (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 5 mm mesh
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 4865
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, bco, bco-dmo, biological, biomass, center, chemical, code, cruise, cruise_id, data, dataset, date, day, day_local, depth, depth_max, depth_min, dmo, erddap, filt, latitude, local, longitude, management, month, month_local, national, ncei, nesdis, net, noaa, nodc, NODC_code, oceanographic, oceanography, office, preliminary, species, sta, sta_id, stage, time, time_local, tow, vol, vol_filt, year, yrday, yrday_local
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/3111/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/3111 (external link)
attribute NC_GLOBAL Northernmost_Northing double 60.7973
attribute NC_GLOBAL param_mapping String {'3111': {'lat': 'master - latitude', 'depth_max': 'flag - depth', 'lon': 'master - longitude'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/3111/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of Alaska Fairbanks
attribute NC_GLOBAL people_0_affiliation_acronym String UAF
attribute NC_GLOBAL people_0_person_name String Dr Kenneth O Coyle
attribute NC_GLOBAL people_0_person_nid String 50498
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 BCO-DMO
attribute NC_GLOBAL people_1_person_name String Nancy Copley
attribute NC_GLOBAL people_1_person_nid String 50396
attribute NC_GLOBAL people_1_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_1_role_type String related
attribute NC_GLOBAL project String NEP
attribute NC_GLOBAL projects_0_acronym String NEP
attribute NC_GLOBAL projects_0_description String 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.
attribute NC_GLOBAL projects_0_geolocation String Northeast Pacific Ocean, Gulf of Alaska
attribute NC_GLOBAL projects_0_name String U.S. GLOBEC Northeast Pacific
attribute NC_GLOBAL projects_0_project_nid String 2038
attribute NC_GLOBAL projects_0_project_website String http://nepglobec.bco-dmo.org (external link)
attribute NC_GLOBAL projects_0_start_date String 1997-01
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 58.046
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String AK-LTOP MOCNESS tow zooplankton abundance and biomass from R/V Alpha Helix, R/V Wecoma multiple cruises in the Northeast Pacific from 1997-2004.
attribute NC_GLOBAL title String AK-LTOP MOCNESS tow zooplankton abundance and biomass from R/V Alpha Helix, R/V Wecoma multiple cruises in the Northeast Pacific from 1997-2004 (NEP project)
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -149.4913
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable year   short  
attribute year _FillValue short 32767
attribute year actual_range short 1997, 2004
attribute year bcodmo_name String year
attribute year description String year, reported as YYYY, e.g. 1995
attribute year long_name String Year
attribute year nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/YEARXXXX/ (external link)
attribute year units String unitless
variable cruise_id   String  
attribute cruise_id bcodmo_name String cruise_id
attribute cruise_id description String cruise designation; name
attribute cruise_id long_name String Cruise Id
attribute cruise_id units String text
variable sta_id   String  
attribute sta_id bcodmo_name String sta_id
attribute sta_id description String Station identification.
attribute sta_id long_name String Sta Id
attribute sta_id units String dimensionless
variable tow   byte  
attribute tow _FillValue byte 127
attribute tow actual_range byte 1, 29
attribute tow bcodmo_name String tow
attribute tow description String Tow number.
attribute tow long_name String Tow
attribute tow units String dimensionless
variable date_local   String  
attribute date_local bcodmo_name String date_local
attribute date_local description String Local month, day and year. in the format�mm/dd/yyyy
attribute date_local long_name String Date Local
attribute date_local source_name String date_local
attribute date_local time_precision String 1970-01-01
attribute date_local units String unitless
variable month_local   String  
attribute month_local bcodmo_name String month_local
attribute month_local description String Month of year, local time.
attribute month_local long_name String Month Local
attribute month_local units String mm (01 to 12)
variable day_local   String  
attribute day_local bcodmo_name String day_local
attribute day_local description String Day, local time.
attribute day_local long_name String Day Local
attribute day_local units String dd (0 to 31)
variable yrday_local   short  
attribute yrday_local _FillValue short 32767
attribute yrday_local actual_range short 62, 290
attribute yrday_local bcodmo_name String yrday_local
attribute yrday_local description String Local day and decimal time, as 326.5 for the 326th day of the year, or November 22 at 1200 hours (noon).
attribute yrday_local long_name String Yrday Local
attribute yrday_local units String dimensionless
variable net   byte  
attribute net _FillValue byte 127
attribute net actual_range byte 2, 9
attribute net bcodmo_name String net
attribute net description String Net number.
attribute net long_name String Net
attribute net units String dimensionless
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double 58.046, 60.7973
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, in decimal degrees, North is positive, negative denotes 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 -149.4913, -144.1596
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, in decimal degrees, East is positive, negative denotes 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_min   short  
attribute depth_min _FillValue short 32767
attribute depth_min actual_range short -3, 501
attribute depth_min bcodmo_name String depth
attribute depth_min colorBarMaximum double 8000.0
attribute depth_min colorBarMinimum double -8000.0
attribute depth_min colorBarPalette String TopographyDepth
attribute depth_min description String minimum depth of net sampling
attribute depth_min long_name String Depth
attribute depth_min nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/DEPH/ (external link)
attribute depth_min standard_name String depth
attribute depth_min 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 1.0, 612.0
attribute depth axis String Z
attribute depth bcodmo_name String depth
attribute depth colorBarMaximum double 8000.0
attribute depth colorBarMinimum double -8000.0
attribute depth colorBarPalette String TopographyDepth
attribute depth description String maximum depth during net sampling
attribute depth ioos_category String Location
attribute depth long_name String Depth
attribute depth nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/DEPH/ (external link)
attribute depth positive String down
attribute depth standard_name String depth
attribute depth units String m
variable vol_filt   float  
attribute vol_filt _FillValue float NaN
attribute vol_filt actual_range float 3.3, 1056.3
attribute vol_filt bcodmo_name String vol_filt
attribute vol_filt description String volume of water filtered
attribute vol_filt long_name String Vol Filt
attribute vol_filt units String meters^3
variable time_local   String  
attribute time_local bcodmo_name String time_local
attribute time_local description String Time of day, local time, using 2400 clock format.
attribute time_local long_name String Time Local
attribute time_local units String HHMM
variable species   String  
attribute species bcodmo_name String species
attribute species description String A binomial that consists of a genus name followed by the species name of an organism.
attribute species long_name String Species
attribute species units String text
variable NODC_code   String  
attribute NODC_code bcodmo_name String taxon_code
attribute NODC_code description String Taxonomic group or entity code, a ten digit number based on the NODC Taxonomic List.
attribute NODC_code long_name String NODC Code
attribute NODC_code units String dimensionless
variable stage   String  
attribute stage bcodmo_name String stage
attribute stage description String Organism life history stage.
attribute stage long_name String Stage
attribute stage units String text
variable abundance   double  
attribute abundance _FillValue double NaN
attribute abundance actual_range double 6.0E-4, 3968.635
attribute abundance bcodmo_name String abundance
attribute abundance description String number of the specific taxa/group counted
attribute abundance long_name String Abundance
attribute abundance nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/B070/ (external link)
attribute abundance units String number per meter3
variable biomass   double  
attribute biomass _FillValue double NaN
attribute biomass actual_range double 8.5E-8, 11.02986
attribute biomass bcodmo_name String biomass
attribute biomass description String wet weight of a specific taxa/group identified
attribute biomass long_name String Biomass
attribute biomass units String grams/meter^3

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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