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Title Sum-
Institution Dataset ID
   set  data   graph     files  public GLOBEC NEP Northern California Current Bird Data NH0005, 0007    ?   F   I   M   background (external link) RSS Subscribe GLOBEC erdGlobecBirds

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL cdm_data_type String Trajectory
attribute NC_GLOBAL cdm_trajectory_variables String trans_id
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL Easternmost_Easting double -124.03
attribute NC_GLOBAL featureType String Trajectory
attribute NC_GLOBAL geospatial_lat_max double 44.675
attribute NC_GLOBAL geospatial_lat_min double 41.87
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -124.03
attribute NC_GLOBAL geospatial_lon_min double -126.132
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL id String Globec_birds
attribute NC_GLOBAL infoUrl String (external link)
attribute NC_GLOBAL institution String GLOBEC
attribute NC_GLOBAL keywords String Atmosphere > Atmospheric Winds > Surface Winds,
Biological Classification > Animals/Vertebrates > Birds,
Biosphere > Aquatic Ecosystems > Coastal Habitat,
Biosphere > Aquatic Ecosystems > Marine Habitat,
animals, aquatic, area, atmosphere, atmospheric, behavior, biological, biology, biosphere, bird, birds, california, classification, coastal, code, course, current, data, direction, ecosystems, flight, globec, habitat, identifier, marine, nep, nh0005, northern, number, ocean, recorded, ship, species, speed, surface, surveyed, time, transect, unadjusted, vertebrates, wind, wind_speed, winds
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.
attribute NC_GLOBAL Northernmost_Northing double 44.675
attribute NC_GLOBAL references String David G. Ainley, Larry B. Spear, Cynthia T. Tynan, John A. Barth, Stephen D. Pierce, R. Glenn Ford and Timothy J. Cowles, 2005. Physical and biological variables affecting seabird distributions during the upwelling season of the northern California Current. Deep Sea Research Part II: Topical Studies in Oceanography, Volume 52, Issues 1-2, January 2005, Pages 123-143

L.B. Spear, N. Nur & D.G. Ainley. 1992. Estimating absolute densities of flying seabirds using analyses of relative movement. Auk 109:385-389.

L.B. Spear & D.G. Ainley. 1997. Flight behaviour of seabirds in relation to wind direction and wing morphology. Ibis 139: 221-233.

L.B. Spear & D.G. Ainley. 1997. Flight speed of seabirds in relation to wind speed and direction. Ibis 139: 234-251.

L.B. Spear, D.G. Ainley, B.D. Hardesty, S.N.G. Howell & S.G. Webb. 2004. Reducing biases affecting at-sea surveys of seabirds: use of multiple observer teams. Marine Ornithology 32: 147?157.
attribute NC_GLOBAL sourceUrl String (local files; contact
attribute NC_GLOBAL Southernmost_Northing double 41.87
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v29
attribute NC_GLOBAL subsetVariables String trans_id, trans_no, longitude, latitude, time, species, behav_code
attribute NC_GLOBAL summary String GLOBEC (GLOBal Ocean ECosystems Dynamics) NEP (Northeast Pacific)
Northern California Current Bird Data from R/V New Horizon cruises NH0005 and 0007.

As a part of the GLOBEC-Northeast Pacific project, we investigated variation in the abundance of marine birds in the context of biological and physical habitat conditions in the northern portion of the California Current System (CCS) during cruises during the upwelling season 2000. Continuous surveys of seabirds were conducted simultaneously in June (onset of upwelling) and August (mature phase of upwelling).

Seabird surveys were conducted continuously during daylight, using a 300-m-wide transect strip. Within that strip, birds were counted that occurred within the 90 degree quadrant off the ship's bow that offered the best observation conditions.

Observed counts of seabirds recorded as flying in a steady direction were adjusted for the effect of flight speed and direction relative to that of the ship (Spear et al., 1992; Spear and Ainley, 1997b). The effect of such flux is the most serious bias encountered during seabird surveys at sea (Spear et al., 2005). Known as random directional movement (as opposed to nonrandom directional movement, which occurs when birds are attracted or repelled from the survey vessel), this problem usually results in density overestimation because most species fly faster than survey vessels; densities of birds that fly slower or at a similar speed as the survey vessel (e.g., storm-petrels), or are flying in the same direction, are usually underestimated (Spear et al., 1992)

(extracted from: David G. Ainley, Larry B. Spear, Cynthia T. Tynan, John A. Barth, Stephen D. Pierce, R. Glenn Ford and Timothy J. Cowles, 2005. Physical and biological variables affecting seabird distributions during the upwelling season of the northern California Current. Deep Sea Research Part II: Topical Studies in Oceanography, Volume 52, Issues 1-2, January 2005, Pages 123-143)

For more information, see

Cynthia T. Tynan,, Woods Hole Oceanographic Institution
David G. Ainley,, H.T. Harvey & Associates
attribute NC_GLOBAL time_coverage_end String 2000-08-12T00:00:00Z
attribute NC_GLOBAL time_coverage_start String 2000-05-30T00:00:00Z
attribute NC_GLOBAL title String GLOBEC NEP Northern California Current Bird Data NH0005, 0007
attribute NC_GLOBAL Westernmost_Easting double -126.132
variable trans_no   short  
attribute trans_no _FillValue short 32767
attribute trans_no actual_range short 11603, 22508
attribute trans_no cf_role String trajectory_id
attribute trans_no colorBarMaximum double 24000.0
attribute trans_no colorBarMinimum double 10000.0
attribute trans_no ioos_category String Identifier
attribute trans_no long_name String Transect Number
attribute trans_no missing_value short 32767
variable trans_id   int  
attribute trans_id _FillValue int 2147483647
attribute trans_id actual_range int 8388607, 8388607
attribute trans_id colorBarMaximum double 1.0E7
attribute trans_id colorBarMinimum double 0.0
attribute trans_id ioos_category String Identifier
attribute trans_id long_name String ID Number for a Location on the Transect
attribute trans_id missing_value int 2147483647
variable longitude   float  
attribute longitude _CoordinateAxisType String Lon
attribute longitude _FillValue float NaN
attribute longitude actual_range float -126.132, -124.03
attribute longitude axis String X
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude missing_value float NaN
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable latitude   float  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue float NaN
attribute latitude actual_range float 41.87, 44.675
attribute latitude axis String Y
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude missing_value float NaN
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable time   double  
attribute time _CoordinateAxisType String Time
attribute time _FillValue double NaN
attribute time actual_range double 9.596448E8, 9.660384E8
attribute time axis String T
attribute time colorBarMaximum double 9.660384E8
attribute time colorBarMinimum double 9.596448E8
attribute time ioos_category String Time
attribute time long_name String Time
attribute time missing_value double NaN
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time units String seconds since 1970-01-01T00:00:00Z
variable area   float  
attribute area _FillValue float -9999999.0
attribute area actual_range float 0.3, 1.9
attribute area colorBarMaximum double 2.0
attribute area colorBarMinimum double 0.0
attribute area ioos_category String Other
attribute area long_name String Ocean Area Surveyed in the Transect
attribute area missing_value float -9999999.0
attribute area units String km2
variable behav_code   byte  
attribute behav_code _FillValue byte 127
attribute behav_code actual_range byte 1, 3
attribute behav_code colorBarMaximum double 3.0
attribute behav_code colorBarMinimum double 0.0
attribute behav_code comment String Code Description
------ --------------------
1 Flying directionally
2 Sitting on water
3 Feeding
attribute behav_code ioos_category String Biology
attribute behav_code long_name String Behavior Code
attribute behav_code missing_value byte 127
variable flight_dir   short  
attribute flight_dir _FillValue short 32767
attribute flight_dir actual_range short 0, 360
attribute flight_dir colorBarMaximum double 360.0
attribute flight_dir colorBarMinimum double 0.0
attribute flight_dir comment String to nearest 10 degrees
attribute flight_dir ioos_category String Biology
attribute flight_dir long_name String Flight Direction
attribute flight_dir missing_value short 400
attribute flight_dir units String degrees_true
variable head_c   short  
attribute head_c _FillValue short 32767
attribute head_c actual_range short 10, 360
attribute head_c colorBarMaximum double 360.0
attribute head_c colorBarMinimum double 0.0
attribute head_c comment String to nearest 10 degrees
attribute head_c ioos_category String Location
attribute head_c long_name String Ship Course
attribute head_c missing_value short 32767
attribute head_c units String degrees_true
variable number   byte  
attribute number _FillValue byte 127
attribute number actual_range byte 1, 125
attribute number colorBarMaximum double 125.0
attribute number colorBarMinimum double 0.0
attribute number ioos_category String Biology
attribute number long_name String Unadjusted Number of Birds Recorded
attribute number missing_value byte 127
attribute number units String count
variable number_adj   float  
attribute number_adj _FillValue float -9999999.0
attribute number_adj actual_range float 0.052, 1350.0
attribute number_adj colorBarMaximum double 1400.0
attribute number_adj colorBarMinimum double 0.0
attribute number_adj comment String Number of birds recorded after adjustment for the effect of bird movement relative to that of the ship (flux).
attribute number_adj ioos_category String Biology
attribute number_adj long_name String Adjusted Number of Birds Recorded
attribute number_adj missing_value float -9999999.0
attribute number_adj units String count
variable species   String  
attribute species comment String Species Code Description
------------ --------------------
AKCA Cassin's Auklet
AKPA Parakeet Auklet
AKRH Rhinoceros Auklet
ALBF Black-footed Albatross
ALLA Laysan Albatross
COBR Brandt's Cormorant
COPE Pelagic Cormorant
FUNO Northern Fulmar
GUCA California Gull
GUGW Glaucous-winged Gull
GUHR Heermann's Gull
GUPI Pigeon Guillemot
GURB Ring-bill Gull
GUSA Sabine's Gull
GUWE Western Gull
JALT Long-tailed Jaeger
JAPA Parasitic Jaeger
JAPO Pomarine Jaeger
LOAR Pacific Loon
LOCO Common Loon
MUCO Common Murre
MUMA Marbled Murrelet
MUXA Xantus' Murrelet
PELB Brown Pelican
PHNO Red-necked Phalarope
PHRE Red Phalarope
SHFF Flesh-footed Shearwater
SHPF Pink-footed Shearwater
SHSO Sooty Shearwater
SKMA South Polar Skua
STFT Fork-tailed Storm-Petrel
STLE Leach's Storm-Petrel
TEAR Arctic Tern
attribute species ioos_category String Biology
attribute species long_name String Species
variable wspd   short  
attribute wspd _FillValue short -9999
attribute wspd actual_range short 0, 35
attribute wspd colorBarMaximum double 15.0
attribute wspd colorBarMinimum double 0.0
attribute wspd comment String Caution. Wind speed and direction may not be corrected for ship motion.
attribute wspd ioos_category String Wind
attribute wspd long_name String Wind Speed
attribute wspd missing_value short 32767
attribute wspd units String knots

This information is also available in other file formats (.csv, .htmlTable, .json, .mat, .nc, .tsv, .xhtml) via a RESTful web service.

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