ERDDAP > info > bcodmo_dataset_4013

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	public	Nautical Area Scattering Coefficients (NASC) from R/V New Horizon cruises NH1106 and NH1006 in the Guaymas Basin in 2010 and 2011 (Jumbo Squid Physiology project)		I   M	background			BCO-DMO	bcodmo_dataset_4013

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	Acoustic data were collected nearly continuously using Simrad EK60s at 4 frequencies (38, 70, 120, and 200 kHz). Split beam transducers (Simrad model numbers: 38-12, 70-7c, 120-7c, 200-7c) were mounted 1.5 m below the surface on a rigid pole. Each transmitted a 512 us pulse as frequently as possible for the water depth. Raw data were stored using Simrad ER60 software. Noise from splash down, electrical interference, and CTD casts were flagged as \u2018bad data\u2019 using Echoview software before integration. Acoustic backscattering values at 38 kHz that were greater than -75 dB were integrated in 1 km horizontal bins from depths of 5m to 500m or 1 m above the bottom, whichever was shallower. These integrated, area scattering values or Nautical Area Scattering Coefficients (NASC: m2 nmi-2) are provided.
attribute	NC_GLOBAL	awards_0_award_nid	String	55202
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-0851239
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward?AWD_ID=0851239
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	David L. Garrison
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	50534
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Integrated Acoustic Scattering Guaymas Basin, Gulf of California PI: Kelly Benoit-Bird (OSU) Version: 15 Aug 2013
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/
attribute	NC_GLOBAL	data_source	String	extract_data_as_tsv version 2.3 19 Dec 2019
attribute	NC_GLOBAL	date_created	String	2013-08-15T18:42:10Z
attribute	NC_GLOBAL	date_modified	String	2019-11-12T21:00:18Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.4013.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-110.904157
attribute	NC_GLOBAL	geospatial_lat_max	double	28.8788278
attribute	NC_GLOBAL	geospatial_lat_min	double	27.2431833
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-110.904157
attribute	NC_GLOBAL	geospatial_lon_min	double	-113.2795402
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/4013
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	Simrad EK-60 echosounder
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	Acoustic data were collected nearly continuously using Simrad EK60s at 4 frequencies (38, 70, 120, and 200 kHz). Split beam transducers (Simrad model numbers: 38-12, 70-7c, 120-7c, 200-7c) were mounted 1.5 m below the surface on a rigid pole.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	6240
attribute	NC_GLOBAL	instruments_0_description	String	A split-beam scientific echosounder primarily designed for fisheries research. It can operate seven frequencies simultaneously ranging from 18 to 710 kHz. Real time echo integration and target strength analysis in an unlimited number of layers is provided as well as storage of raw data for replay or analysis in one of several post-processing software packages such as Simrad's BI60.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L22/current/TOOL0198/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	Simrad EK-60 echosounder
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	716
attribute	NC_GLOBAL	instruments_0_supplied_name	String	Simrad EK-60 echosounder
attribute	NC_GLOBAL	keywords	String	bco, bco-dmo, biological, chemical, cruise, cruise_end_date, cruise_id, cruise_start_date, data, dataset, date, date_end, date_start, depth, dmo, end, erddap, exclusion, exclusion_line_mean_depth, integration, integration_layer_thickness_mean, lat_end, latitude, layer, line, lon_end, longitude, management, mean, nasc, oceanography, office, preliminary, start, thickness, time, time_end, time_start
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/4013/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/4013
attribute	NC_GLOBAL	Northernmost_Northing	double	28.8788278
attribute	NC_GLOBAL	param_mapping	String	{'4013': {'lon_start': 'flag - longitude', 'lat_start': 'flag - latitude'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/4013/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	Oregon State University
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	OSU-CEOAS
attribute	NC_GLOBAL	people_0_person_name	String	Kelly Benoit-Bird
attribute	NC_GLOBAL	people_0_person_nid	String	51716
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	Oregon State University
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	OSU-CEOAS
attribute	NC_GLOBAL	people_1_person_name	String	Chad Waluk
attribute	NC_GLOBAL	people_1_person_nid	String	51717
attribute	NC_GLOBAL	people_1_role	String	Contact
attribute	NC_GLOBAL	people_1_role_type	String	related
attribute	NC_GLOBAL	people_2_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_2_person_name	String	Shannon Rauch
attribute	NC_GLOBAL	people_2_person_nid	String	51498
attribute	NC_GLOBAL	people_2_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_2_role_type	String	related
attribute	NC_GLOBAL	project	String	Jumbo Squid Physiology
attribute	NC_GLOBAL	projects_0_acronym	String	Jumbo Squid Physiology
attribute	NC_GLOBAL	projects_0_description	String	This project concerns the ecological physiology of Dosidicus gigas, a large squid endemic to the eastern Pacific where it inhabits both open ocean and continental shelf environments. Questions to be addressed include: 1) How does utilization of the OML by D. gigas vary on both a daily and seasonal basis, and how do the vertical distributions of the OML and its associated fauna vary? 2) What behaviors of squid are impaired by conditions found in the OML, and how are impairments compensated to minimize costs of utilizing this environment? and 3) What are the physiological and biochemical processes by which squid maintain swimming activity at such remarkable levels under low oxygen conditions? The investigators will use an integrated approach involving oceanographic, acoustic, electronic tagging, physiological and biochemical methods. D. gigas provides a trophic connection between small, midwater organisms and top vertebrate predators, and daily vertical migrations between near-surface waters and a deep, low-oxygen environment (OML) characterize normal behavior of adult squid. Electronic tagging has shown that this squid can remain active for extended periods in the cold, hypoxic conditions of the upper OML. Laboratory studies have demonstrated suppression of aerobic metabolism during a cold, hypoxic challenge, but anaerobic metabolism does not appear to account for the level of activity maintained. Utilization of the OML in the wild may permit daytime foraging on midwater organisms. Foraging also occurs near the surface at night, and Dosidicus may thus be able to feed continuously. D. gigas is present in different regions of the Guaymas Basin on a predicable year-round basis, allowing changes in squid distribution to be related to changing oceanographic features on a variety time scales. This research is of broad interest because Dosidicus gigas has substantially extended its range over the last decade, and foraging on commercially important finfish in invaded areas off California and Chile has been reported. In addition, the OML has expanded during the last several decades, mostly vertically by shoaling, including in the Gulf of Alaska, the Southern California Bight and several productive regions of tropical oceans, and a variety of ecological impacts will almost certainly accompany changes in the OML. Moreover, D. gigas currently supports the world's largest squid fishery, and this study will provide acoustic methods for reliable biomass estimates, with implications for fisheries management in Mexico and elsewhere. This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This is a Collaborative Research project encompassing three NSF-OCE awards. Background Publications: Stewart, J.S., Field, J.C., Markaida, U., and Gilly, W.F. 2013. Behavioral ecology of jumbo squid (Dosidicus gigas) in relation to oxygen minimum zones. Deep Sea Research Part II: Topical Studies in Oceanography, 95, 197-208. doi:10.1016/j.dsr2.2012.06.005. Gilly, W.F., Zeidberg, L.D., Booth, J.A.T, Stewart, J.S., Marshall, G., Abernathy, K., and Bell, L.E. 2012. Locomotion and behavior of Humboldt squid, Dosidicus gigas, in relation to natural hypoxia in the Gulf of California, Mexico. The Journal of Experimental Biology, 215, 3175-3190. doi: 10.1242/jeb.072538. Related Project: Physiological limits to vertical migrations of the pelagic, jumbo squid, Dosidicus gigas in the Gulf of California
attribute	NC_GLOBAL	projects_0_end_date	String	2013-07
attribute	NC_GLOBAL	projects_0_geolocation	String	Guaymas Basin, Gulf of California, Mexico (27 N 112 W) and Monterey Bay, CA (36 N 123 W)
attribute	NC_GLOBAL	projects_0_name	String	Hypoxia and the ecology, behavior and physiology of jumbo squid, Dosidicus gigas
attribute	NC_GLOBAL	projects_0_project_nid	String	2279
attribute	NC_GLOBAL	projects_0_start_date	String	2009-08
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	27.2431833
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	Integrated, area scattering values, or Natuical Area Scattering Coefficients (NASC) are provided from two cruises in the Guaymas Basin that occurred in June 2010 and June 2011. Also included are the time (UTC) and location at the start and end of each integration bin, mean depth of the exclusion line for each bin, and the average thickness of the integrated cell.\r\n\r\nRaw acoustic scattering data (.raw files) are extremely large. These are archived at Oregon State University and will be shared using physical media upon request.
attribute	NC_GLOBAL	title	String	Nautical Area Scattering Coefficients (NASC) from R/V New Horizon cruises NH1106 and NH1006 in the Guaymas Basin in 2010 and 2011 (Jumbo Squid Physiology project)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-113.2795402
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	cruise_id		String
attribute	cruise_id	bcodmo_name	String	cruise_id
attribute	cruise_id	description	String	Cruise identifier.
attribute	cruise_id	long_name	String	Cruise Id
attribute	cruise_id	units	String	text
variable	cruise_start_date		int
attribute	cruise_start_date	_FillValue	int	2147483647
attribute	cruise_start_date	actual_range	int	20100603, 20110604
attribute	cruise_start_date	bcodmo_name	String	start_date
attribute	cruise_start_date	description	String	Year, month, and day cruise began in YYYYmmdd format.
attribute	cruise_start_date	long_name	String	Cruise Start Date
attribute	cruise_start_date	units	String	unitless
variable	cruise_end_date		int
attribute	cruise_end_date	_FillValue	int	2147483647
attribute	cruise_end_date	actual_range	int	20100616, 20110622
attribute	cruise_end_date	bcodmo_name	String	end_date
attribute	cruise_end_date	description	String	Year, month, and day cruise ended in YYYYmmdd format.
attribute	cruise_end_date	long_name	String	Cruise End Date
attribute	cruise_end_date	units	String	unitless
variable	date_start		int
attribute	date_start	_FillValue	int	2147483647
attribute	date_start	actual_range	int	20100604, 20110622
attribute	date_start	bcodmo_name	String	date_begin
attribute	date_start	description	String	Date at start of integration bin in YYYYmmdd format.
attribute	date_start	long_name	String	Date Start
attribute	date_start	units	String	unitless
variable	time_start		String
attribute	time_start	bcodmo_name	String	time_start
attribute	time_start	description	String	Time (UTC) at start of integration bin in hours, minutes, and decimal minutes.
attribute	time_start	long_name	String	Time Start
attribute	time_start	units	String	HHMM.mmmm
variable	date_end		int
attribute	date_end	_FillValue	int	2147483647
attribute	date_end	actual_range	int	20100604, 20110622
attribute	date_end	bcodmo_name	String	date_end
attribute	date_end	description	String	Date at end of integration bin in YYYYmmdd format.
attribute	date_end	long_name	String	Date End
attribute	date_end	units	String	unitless
variable	time_end		String
attribute	time_end	bcodmo_name	String	time_end
attribute	time_end	description	String	Time (UTC) at end of integration bin in hours, minutes, and decimal minutes.
attribute	time_end	long_name	String	Time End
attribute	time_end	units	String	HHMM.mmmm
variable	NASC		double
attribute	NASC	_FillValue	double	NaN
attribute	NASC	actual_range	double	8.035541, 67177.38664
attribute	NASC	bcodmo_name	String	unknown
attribute	NASC	description	String	Nautical Area Scattering Coefficient (NASC).
attribute	NASC	long_name	String	NASC
attribute	NASC	units	String	m2 nmi-2
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	27.2431833, 28.8788278
attribute	latitude	axis	String	Y
attribute	latitude	bcodmo_name	String	lat_start
attribute	latitude	colorBarMaximum	double	90.0
attribute	latitude	colorBarMinimum	double	-90.0
attribute	latitude	description	String	Latitude at start of integration bin.
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/
attribute	latitude	source_name	String	lat_start
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	-113.2795402, -110.904157
attribute	longitude	axis	String	X
attribute	longitude	bcodmo_name	String	lon_start
attribute	longitude	colorBarMaximum	double	180.0
attribute	longitude	colorBarMinimum	double	-180.0
attribute	longitude	description	String	Longitude at start of integration bin.
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/
attribute	longitude	source_name	String	lon_start
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
variable	lat_end		double
attribute	lat_end	_FillValue	double	NaN
attribute	lat_end	actual_range	double	27.24320167, 28.878825
attribute	lat_end	bcodmo_name	String	lat_end
attribute	lat_end	colorBarMaximum	double	90.0
attribute	lat_end	colorBarMinimum	double	-90.0
attribute	lat_end	description	String	Latitude at end of integration bin.
attribute	lat_end	long_name	String	Latitude
attribute	lat_end	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LATX/
attribute	lat_end	standard_name	String	latitude
attribute	lat_end	units	String	decimal degrees
variable	lon_end		double
attribute	lon_end	_FillValue	double	NaN
attribute	lon_end	actual_range	double	-113.2795428, -110.9041639
attribute	lon_end	bcodmo_name	String	lon_end
attribute	lon_end	colorBarMaximum	double	180.0
attribute	lon_end	colorBarMinimum	double	-180.0
attribute	lon_end	description	String	Longitude at end of integration bin.
attribute	lon_end	long_name	String	Longitude
attribute	lon_end	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LONX/
attribute	lon_end	standard_name	String	longitude
attribute	lon_end	units	String	decimal degrees
variable	exclusion_line_mean_depth		double
attribute	exclusion_line_mean_depth	_FillValue	double	NaN
attribute	exclusion_line_mean_depth	actual_range	double	35.221337, 500.0
attribute	exclusion_line_mean_depth	bcodmo_name	String	unknown
attribute	exclusion_line_mean_depth	description	String	Mean depth of the exclusion line for each bin.
attribute	exclusion_line_mean_depth	long_name	String	Exclusion Line Mean Depth
attribute	exclusion_line_mean_depth	units	String	meters
variable	integration_layer_thickness_mean		double
attribute	integration_layer_thickness_mean	_FillValue	double	NaN
attribute	integration_layer_thickness_mean	actual_range	double	30.231147, 494.967585
attribute	integration_layer_thickness_mean	bcodmo_name	String	unknown
attribute	integration_layer_thickness_mean	description	String	Average thickness of the integrated cell.
attribute	integration_layer_thickness_mean	long_name	String	Integration Layer Thickness Mean
attribute	integration_layer_thickness_mean	units	String	meters

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.