ERDDAP > info > bcodmo_dataset_520594

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	public	[Integrated Acoustic Scattering BIP] - Nautical Area Scattering Coefficients (NASC) from an R/ V BIP cruise in the Guaymas Basin, Gulf of California in 2013 (Jumbo Squid El Nino Response project) (Adaptable life history strategy of a migratory large predator in response to El Nino and climate change)		F   I   M	background			BCO-DMO	bcodmo_dataset_520594

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. 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\u00a0nmi-2)\u00a0are provided. Noise removal from this data set (e.g. splash down, electrical interference, and CTD casts) was minimal before integration.
attribute	NC_GLOBAL	awards_0_award_nid	String	520405
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1338432
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward?AWD_ID=1338432
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 Mexico, October 2013 PI: Kelly Benoit-Bird (OSU) Version: 23 July 2014
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	2014-07-23T15:13:04Z
attribute	NC_GLOBAL	date_modified	String	2019-12-30T16:54:50Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.520594.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-111.3343637
attribute	NC_GLOBAL	geospatial_lat_max	double	28.8857926
attribute	NC_GLOBAL	geospatial_lat_min	double	27.24179
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-111.3343637
attribute	NC_GLOBAL	geospatial_lon_min	double	-113.3081006
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/520594
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	520598
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, 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/520594/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/520594
attribute	NC_GLOBAL	Northernmost_Northing	double	28.8857926
attribute	NC_GLOBAL	param_mapping	String	{'520594': {'lon_start': 'flag - longitude', 'lat_start': 'flag - latitude'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/520594/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 El Nino Response
attribute	NC_GLOBAL	projects_0_acronym	String	Jumbo Squid El Nino Response
attribute	NC_GLOBAL	projects_0_description	String	Description from NSF award abstract: This project will examine the response of Dosidicus gigas (Humboldt squid) to an El Niño event in 2009-2010 that was accompanied by a collapse of the commercial fishery for this squid in the Guaymas Basin within the Gulf of California. This large squid is a major predator of great ecological and economic importance in the Gulf of California, the California Current, and Peru Current systems. In early 2010, these squid abandoned their normal coastal-shelf habitats in the Guaymas Basin and instead were found in the Salsipuedes Basin to the north, an area buffered from the effects of El Niño by the upwelling of colder water. The commercial fishery also relocated to this region and large squid were not found in the Guaymas Basin from 2010-2012, instead animals that matured at an unusually small size and young age were abundant. A return to the large size-at-maturity condition has still not occurred, despite the apparent return of normal oceanographic conditions. The El Niño of 2009-2010 presented an unforeseen opportunity to reveal an important feature of adaptability of Dosidicus gigas to an acute climatic anomaly, namely a large decrease in size and age at maturity. Now these investigators will have the opportunity to document recovery to the normal large size-at-maturity condition. The specific aims of this project are: 1) continue a program of acoustic surveys and direct sampling of squid that has already been established in the Gulf of California in order to assess distribution, biomass, life history strategy diet, and migratory and foraging behaviors relative to pre-El Niño conditions and 2) conduct analogous surveys in Monterey Bay, California in conjunction with long-term remote operated vehicle surveys of squid abundance. The data from these studies will provide a comparison of recovery in the two different squid populations and yield valuable insights into what ecological effects an area is expected to experience with an invasion of either small or large Humboldt squid. As long-term climate change progresses, squid of both forms may expand northward into the California Current System. Related Project: Hypoxia and the ecology, behavior and physiology of jumbo squid, Dosidicus gigas
attribute	NC_GLOBAL	projects_0_end_date	String	2015-06
attribute	NC_GLOBAL	projects_0_geolocation	String	Gulf of California and Monterey Bay
attribute	NC_GLOBAL	projects_0_name	String	Adaptable life history strategy of a migratory large predator in response to El Nino and climate change
attribute	NC_GLOBAL	projects_0_project_nid	String	520407
attribute	NC_GLOBAL	projects_0_start_date	String	2013-07
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	27.24179
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 one cruise in the Guaymas Basin that occurred October 2013. 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\nNote that noise removal from this data set (e.g. splash down, electrical interference, and CTD casts) was minimal before integration. Raw 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	[Integrated Acoustic Scattering BIP] - Nautical Area Scattering Coefficients (NASC) from an R/V BIP cruise in the Guaymas Basin, Gulf of California in 2013 (Jumbo Squid El Nino Response project) (Adaptable life history strategy of a migratory large predator in response to El Nino and climate change)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-113.3081006
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	date_start		int
attribute	date_start	_FillValue	int	2147483647
attribute	date_start	actual_range	int	20131020, 20131025
attribute	date_start	bcodmo_name	String	date_begin
attribute	date_start	description	String	Date at start of integration bin. in the format YYYYmmdd
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	20131020, 20131025
attribute	date_end	bcodmo_name	String	date_end
attribute	date_end	description	String	Date at end of integration bin. in the format YYYYmmdd
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	65.507579, 325420.6341
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	27.24179, 28.8857926
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	-113.3081006, -111.3343637
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	27.24180667, 28.88577939
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	-113.3081115, -111.3343267
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	18.341811, 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	12.322174, 494.011495
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.