ERDDAP > info > bcodmo_dataset_2470

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
	set	data	graph		files	public	[CTD_ak_ltop] - CTD cast data from 45 R/V Alpha Helix and R/V Wecoma Long-Term Observation Program (LTOP) cruises to the Coastal Gulf of Alaska from 1997-2004 as part of the U.S. GLOBEC program (NEP project) (U.S. GLOBEC Northeast Pacific)		F   I   M	background			BCO-DMO	bcodmo_dataset_2470

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	Progress Report: April 1999 Project Title: The Gulf of Alaska GLOBEC LTOP Program Investigators: Thomas Weingartner (PI), A. J. Paul (PI), Ken Coyle (PI), Lew Haldorson (PI), Dean Stockwell (PI), Terry Whitledge (PI), Jennifer Boldt, Seth Danielson, Alexei Pinchuk, and Amy Ruehs (All at University of Alaska), and Tom Royer (PI; Old Dominion Univ.) The LTOP monitoring in the Gulf of Alaska completed its first year of sampling which included week-long cruises using the Alpha Helix in October 1997, and March, April, May, July, October, and December 1998. Sampling on all cruises included occupying stations along the Seward Line, which extends from the inner shelf to the edge of the continental slope. At each station CTD profiles and water samples for nutrients, chlorophyll and zooplankton nauplii were collected. Additional sampling includes MOCNESS tows at each of these stations with the tow depths chosen on the basis of backscatter from a 4- frequency, split-beam towed transducer array. The MOCNESS samples allow verification of the acoustical results and provide samples for species identification and additional analyses. The transducer is towed continually along the line and in conjunction with underway measurements of sea surface temperature, salinity, fluorescence and ADCP data provide data at very high spatial resolution. This standard sampling was supplemented during the July and October cruises with coincidental trawls from a charterd fishing vessel and surface gill nets from the Alpha Helix. We have also provided samples and/or sampling opportunities to other scientists for measurements of stable isotope composition of biota, dissolved carbon, bacteria, microzooplankton, seabird and marine mammal, and circulation. The data suggest that the shelf is organized into three distinct dynamic and biological regimes. The innermost portion of the shelf consists of the Alaska Coastal Current, which is a high speed, persistent, dilute coastal current which is generally low in nutrients and chlorophyll. The inner shelf is segregated from the midshelf region by a salinity front. Nutrient concentrations, chlorophyll biomass, zooplankton, fish and seabird abundances appear to be consistently high just offshore of this front. However, it is not clear if this region of locally high biological productivity is associated with frontal processes or with the locally complicated bathymetry and coastline curvature. Over the midshelf region the circulation is weak and variable and biological abundances appear to be patchy in time and space. This region of the shelf often contains eddies having a diamter of ~50km. A third regime straddles the shelfbreak salinity front. Flow here is also swift (and often reflects shoreward movement of the Alaskan Stream) and nutrient, chlorophyll and zooplankton conentrations tend to be relatively high. Fish, seabird, and mammal abundances are also relatively high in this region. There is some suggestion that the vertebrate community structure here differs from that of the inner shelf. Time permitting we augment the sampling along the Seward Line with additional alongshore transects. While these are relatively few in number they suggest that biological production is highly patchy owing perhaps to very complicated bathymetry. The first year of sampling occurred during an El Nino year and the physical effects of this phenomenom included unusually warm (~1-2C above normal) and fresh (.15 psu) waters over the uper 200 m of the shelf. By summer, deep water temperatures were returning to normal and deep water salinities were above normal. The reason for the latter is not known but it implies either abnormally high upwelling rates or changes in the the composition of the offshore water masses that annually flow inshore. Higher salinities imply higher nutrient concentrations. However, it is not clear that changes in deep nutrient concentrations in the deep water on the shelf affect surface production. Additional information about the GLOBEC LTOP in the Coastal Gulf of Alaska, including plots of cruise results, station locations, etc., can be obtained at: [http://www.ims.uaf.edu/GLOBEC/](\\"http://www.ims.uaf.edu/GLOBEC/\\")
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
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	ctd_lev1 datafile: CTD_HX201.dat ctd_lev2 datafile: CTD_HX201_1.dat
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	2009-11-29T11:22:08Z
attribute	NC_GLOBAL	date_modified	String	2019-11-28T15:08:27Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.2470.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-143.6689
attribute	NC_GLOBAL	geospatial_lat_max	double	61.2601
attribute	NC_GLOBAL	geospatial_lat_min	double	57.7995
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-143.6689
attribute	NC_GLOBAL	geospatial_lon_min	double	-150.9358
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	geospatial_vertical_max	double	8.83
attribute	NC_GLOBAL	geospatial_vertical_min	double	-999.0
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/2470
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	CTD
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	CTD measurements taken, CTD unit unidentified
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	4145
attribute	NC_GLOBAL	instruments_0_description	String	The Conductivity, Temperature, Depth (CTD) unit is an integrated instrument package designed to measure the conductivity, temperature, and pressure (depth) of the water column. The instrument is lowered via cable through the water column and permits scientists observe the physical properties in real time via a conducting cable connecting the CTD to a deck unit and computer on the ship. The CTD is often configured with additional optional sensors including fluorometers, transmissometers and/or radiometers. It is often combined with a Rosette of water sampling bottles (e.g. Niskin, GO-FLO) for collecting discrete water samples during the cast. This instrument designation is used when specific make and model are not known.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/130/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	CTD profiler
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	417
attribute	NC_GLOBAL	instruments_0_supplied_name	String	Conductivity, Temperature, Depth
attribute	NC_GLOBAL	keywords	String	ac3, ac3_fluor, active, available, bco, bco-dmo, biological, chemical, code, cruiseid, data, dataset, day, day_gmt, density, depth, depth_to_bottom, depth_w, dmo, downwelling, downwelling_photosynthetic_photon_radiance_in_sea_water, dyn, dyn_height, earth, Earth Science > Oceans > Ocean Optics > Photosynthetically Active Radiation, Earth Science > Oceans > Ocean Optics > Radiance, Earth Science > Oceans > Salinity/Density > Salinity, erddap, fluor, height, interp, interp_code, latitude, longitude, management, max, min, month, month_gmt, ocean, oceanography, oceans, office, optics, PAR, photon, photosynthetic, photosynthetically, practical, preliminary, press, press_max, press_min, radiance, radiation, salinity, science, sea, sea_water_practical_salinity, seawater, ship, sigma, sigma_t, station, stn, stn_id, temperature, time, time_gmt, trans, water, year
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/2470/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/2470
attribute	NC_GLOBAL	Northernmost_Northing	double	61.2601
attribute	NC_GLOBAL	param_mapping	String	{'2470': {'lat': 'flag - latitude', 'depth_to_bottom': 'flag - depth', 'lon': 'flag - longitude'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/2470/parameters
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 Thomas J. Weingartner
attribute	NC_GLOBAL	people_0_person_nid	String	50468
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	Ms Dicky Allison
attribute	NC_GLOBAL	people_1_person_nid	String	50382
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
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	57.7995
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	subsetVariables	String	press_min
attribute	NC_GLOBAL	summary	String	CTD cast data from 45 R/V Alpha Helix and R/V Wecoma Long-Term Observation Program (LTOP) cruises to the Coastal Gulf of Alaska from 1997-2004 as part of the U.S. GLOBEC program (NEP project)
attribute	NC_GLOBAL	title	String	[CTD_ak_ltop] - CTD cast data from 45 R/V Alpha Helix and R/V Wecoma Long-Term Observation Program (LTOP) cruises to the Coastal Gulf of Alaska from 1997-2004 as part of the U.S. GLOBEC program (NEP project) (U.S. GLOBEC Northeast Pacific)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-150.9358
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. HX217 represents R/V Alpha Helix cruise number 217.
attribute	cruiseid	long_name	String	Cruiseid
attribute	cruiseid	units	String	no units
variable	ship		String
attribute	ship	bcodmo_name	String	ship
attribute	ship	description	String	name of the ship or vessel (See also platform.)
attribute	ship	long_name	String	Ship
attribute	ship	units	String	no units
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, e.g. 1997
attribute	year	long_name	String	Year
attribute	year	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/YEARXXXX/
attribute	year	units	String	no units
variable	station		short
attribute	station	_FillValue	short	32767
attribute	station	actual_range	short	1, 143
attribute	station	bcodmo_name	String	station
attribute	station	description	String	consecutive station number
attribute	station	long_name	String	Station
attribute	station	units	String	no units
variable	stn_id		String
attribute	stn_id	bcodmo_name	String	station
attribute	stn_id	description	String	station identification code
attribute	stn_id	long_name	String	Stn Id
attribute	stn_id	units	String	no units
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	57.7995, 61.2601
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
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	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	-150.9358, -143.6689
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
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	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	0, 4200
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	water depth, in meters
attribute	depth_w	long_name	String	Depth
attribute	depth_w	standard_name	String	depth
attribute	depth_w	units	String	meters
variable	press_min		byte
attribute	press_min	_FillValue	byte	127
attribute	press_min	actual_range	byte	0, 0
attribute	press_min	bcodmo_name	String	press_bar
attribute	press_min	description	String	minimum pressure during cast
attribute	press_min	long_name	String	Press Min
attribute	press_min	units	String	millibars
variable	press_max		short
attribute	press_max	_FillValue	short	32767
attribute	press_max	actual_range	short	3, 1783
attribute	press_max	bcodmo_name	String	press_bar
attribute	press_max	description	String	maximum pressure during cast
attribute	press_max	long_name	String	Press Max
attribute	press_max	units	String	millibars
variable	month_gmt		String
attribute	month_gmt	bcodmo_name	String	month_gmt
attribute	month_gmt	description	String	Month of year, GMT time , i.e. 01-12.
attribute	month_gmt	long_name	String	Month Gmt
attribute	month_gmt	units	String	no units
variable	day_gmt		String
attribute	day_gmt	bcodmo_name	String	day_gmt
attribute	day_gmt	description	String	Day, GMT time e.g. 22.
attribute	day_gmt	long_name	String	Day Gmt
attribute	day_gmt	units	String	no units
variable	time_gmt		String
attribute	time_gmt	bcodmo_name	String	time_gmt
attribute	time_gmt	description	String	time of day, reported in GMT time, 24 hour clock
attribute	time_gmt	long_name	String	Time Gmt
attribute	time_gmt	units	String	hhmm
variable	press		short
attribute	press	_FillValue	short	32767
attribute	press	actual_range	short	0, 1783
attribute	press	bcodmo_name	String	press_bar
attribute	press	description	String	pressure at ctd sampling point
attribute	press	long_name	String	Press
attribute	press	units	String	millibars
variable	temp		float
attribute	temp	_FillValue	float	NaN
attribute	temp	actual_range	float	1.592, 17.206
attribute	temp	bcodmo_name	String	temp2
attribute	temp	description	String	water temperature, as observed by a CTD unit
attribute	temp	long_name	String	Temperature
attribute	temp	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/TEMPS601/
attribute	temp	units	String	degrees Celsius
variable	salinity		float
attribute	salinity	_FillValue	float	NaN
attribute	salinity	actual_range	float	15.493, 34.558
attribute	salinity	bcodmo_name	String	sal
attribute	salinity	colorBarMaximum	double	37.0
attribute	salinity	colorBarMinimum	double	32.0
attribute	salinity	description	String	salinity, calculated from the CTD 'primary sensors' of conductivity and temperature.
attribute	salinity	long_name	String	Sea Water Practical Salinity
attribute	salinity	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/PSALST01/
attribute	salinity	units	String	Practical salinity scale, dimensionless
variable	sigma_t		float
attribute	sigma_t	_FillValue	float	NaN
attribute	sigma_t	actual_range	float	11.353, 27.614
attribute	sigma_t	bcodmo_name	String	sigma-t
attribute	sigma_t	description	String	sigma-theta density
attribute	sigma_t	long_name	String	Sigma T
attribute	sigma_t	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/SIGTEQST/
attribute	sigma_t	units	String	kilograms per meters cubed - 1000
variable	dyn_height		float
attribute	dyn_height	_FillValue	float	NaN
attribute	dyn_height	actual_range	float	0.0, 3.47374
attribute	dyn_height	bcodmo_name	String	dynh_0
attribute	dyn_height	description	String	dynamic height, referenced to surface
attribute	dyn_height	long_name	String	Dyn Height
attribute	dyn_height	units	String	meters
variable	fluor		float
attribute	fluor	_FillValue	float	NaN
attribute	fluor	actual_range	float	-999.0, 5.278
attribute	fluor	bcodmo_name	String	fluorescence
attribute	fluor	description	String	fluorescence
attribute	fluor	long_name	String	Fluor
attribute	fluor	missing_value	float	NaN
attribute	fluor	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/CPHLPM01/
attribute	fluor	units	String	?
variable	ac3_fluor		float
attribute	ac3_fluor	_FillValue	float	NaN
attribute	ac3_fluor	actual_range	float	0.0, 4.99
attribute	ac3_fluor	bcodmo_name	String	fluorescence
attribute	ac3_fluor	description	String	fluorescence
attribute	ac3_fluor	long_name	String	Ac3 Fluor
attribute	ac3_fluor	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/CPHLPM01/
attribute	ac3_fluor	units	String	?
variable	trans		float
attribute	trans	_FillValue	float	NaN
attribute	trans	actual_range	float	-3.28, 5.02
attribute	trans	bcodmo_name	String	trans_v
attribute	trans	description	String	light transmission
attribute	trans	long_name	String	Trans
attribute	trans	units	String	volts
variable	PAR		float
attribute	PAR	_FillValue	float	NaN
attribute	PAR	actual_range	float	-999.0, 5.0
attribute	PAR	bcodmo_name	String	PAR
attribute	PAR	colorBarMaximum	double	70.0
attribute	PAR	colorBarMinimum	double	0.0
attribute	PAR	description	String	downwell Photosynthetically Available Radiation
attribute	PAR	long_name	String	Downwelling Photosynthetic Photon Radiance In Sea Water
attribute	PAR	missing_value	float	NaN
attribute	PAR	units	String	uE/cm2/sec
variable	depth		double
attribute	depth	_CoordinateAxisType	String	Height
attribute	depth	_CoordinateZisPositive	String	down
attribute	depth	_FillValue	double	NaN
attribute	depth	actual_range	double	-999.0, 8.83
attribute	depth	axis	String	Z
attribute	depth	bcodmo_name	String	unknown
attribute	depth	colorBarMaximum	double	8000.0
attribute	depth	colorBarMinimum	double	-8000.0
attribute	depth	colorBarPalette	String	TopographyDepth
attribute	depth	description	String	depth from instrument to bottom
attribute	depth	ioos_category	String	Location
attribute	depth	long_name	String	Depth
attribute	depth	missing_value	double	NaN
attribute	depth	positive	String	down
attribute	depth	standard_name	String	depth
attribute	depth	units	String	m
variable	interp_code		byte
attribute	interp_code	_FillValue	byte	127
attribute	interp_code	actual_range	byte	0, 3
attribute	interp_code	bcodmo_name	String	unknown
attribute	interp_code	description	String	?
attribute	interp_code	long_name	String	Interp Code
attribute	interp_code	units	String	?

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.