Citation:

PANGAEA.976184

Name: CTD variables from cruises conducted offshore of Ensenada, Baja California, Mexico (IMECOCAL sampling Line 100) from 1998 to 2016
Published: 2025-08-28
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Baja California; CTD/Casts; IMECOCAL; profiles

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Published: 2025-08-28 • DOI registered: 2025-09-25

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Abstract:

The dataset includes temperature and salinity CTD profiles performed at 8 hydrographic stations conducted offshore of Ensenada, Baja California (Mexico) along Line 100 of the Investigaciones Mexicanas de la Corriente de California (IMECOCAL) program. The regular IMECOCAL stations of Line 100 are spaced 37 km apart and extend a maximum distance of 220 km offshore. The stations were performed on board the Francisco de Ulloa (1998 to 2013), BIPO (2014-2015), and Alpha Helix (2016) research vessels. CTD casts were performed down to 1000 m depth (bottom depth allowing) by means of a 24 Hz sampling rate mainly with a SeaBird CTD system equipped with factory-calibrated primary and secondary sensors for temperature and conductivity. Data were processed using the UNESCO 1980 equation of state, and both measured and derived quantities were averaged over 1 dbar intervals using software provided by the manufacturer. Data columns include sampling date/time stamps in ISO format, longitude, latitude, depth, pressure, temperature, salinity, and potential density anomaly information. The CTD data were used to estimate pH, calcium carbonate saturation states, and DIC concentrations from 1998 to 2016 based on the algorithms of Alin et al. (2012).

Keyword(s):

Baja California; CTD/Casts; IMECOCAL; profiles

Related to:

Alin, Simone R; Feely, Richard A; Dickson, Andrew G; Hernandez-Ayon, Jose Martin; Juranek, Lauren W; Ohman, Mark D; Goericke, Ralf (2012): Robust empirical relationships for estimating the carbonate system in the southern California Current System and application to CalCOFI hydrographic cruise data (2005–2011). Journal of Geophysical Research: Oceans, 117(C5), 2011JC007511, https://doi.org/10.1029/2011JC007511

Baumgartner, Tim; Durazo, Reginaldo; Lavaniegos, B; Gaxiola-Castro, Gilberto; Gómez, J; García, J (2008): Ten years of change from IMECOCAL observations in the southern region of the California Current Ecosystem. Globec International Newsletter, 14 no.2, 64

Hernández-Ayón, José Martín; Oliva-Mendez, Norma Lidia; Valencia-Gasti, José Augusto (2025): Measurements of dissolved inorganic carbon (DIC) offshore of Ensenada, Baja California, Mexico (IMECOCAL sampling Line 100) from 2008 to 2016 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.975983

Johnsson, K M; Sieburth, J M N; Williams, P J I; Brandstrom, L (1987): Coulometric total carbon dioxide analysis for marine studies: automation and calibration. Marine Chemistry, 21(2), 117-133, https://doi.org/10.1016/0304-4203(87)90033-8

Oliva-Mendez, Norma Lidia; Hernandez-Ayon, Jose Martin; Valencia-Gasti, José Augusto; Durazo, Reginaldo; Santamaría-del-Ángel, E; Alin, Simone R; Feely, Richard A (2025): Seasonal and Interannual Variability of the Aragonite Saturation Horizon in the California Current System of Baja California. Journal of Geophysical Research: Oceans, 130(6), e2024JC021653, https://doi.org/10.1029/2024JC021653

Funding:

National Council for the Humanities, Sciences and Technology (CONACYT, CONAHCYT), grant/award no. 017PÑ-1297 : Investigaciones Mexicanas de la Corriente de California (IMECOCAL)

National Council for the Humanities, Sciences and Technology (CONACYT, CONAHCYT), grant/award no. 23947 : Investigaciones Mexicanas de la Corriente de California (IMECOCAL)

National Council for the Humanities, Sciences and Technology (CONACYT, CONAHCYT), grant/award no. 254745 : Investigaciones Mexicanas de la Corriente de California (IMECOCAL)

National Council for the Humanities, Sciences and Technology (CONACYT, CONAHCYT), grant/award no. 255602 : Investigaciones Mexicanas de la Corriente de California (IMECOCAL)

National Council for the Humanities, Sciences and Technology (CONACYT, CONAHCYT), grant/award no. 47044 : Investigaciones Mexicanas de la Corriente de California (IMECOCAL)

National Council for the Humanities, Sciences and Technology (CONACYT, CONAHCYT), grant/award no. 48367 : Investigaciones Mexicanas de la Corriente de California (IMECOCAL)

National Council for the Humanities, Sciences and Technology (CONACYT, CONAHCYT), grant/award no. C02-42569 : Investigaciones Mexicanas de la Corriente de California (IMECOCAL)

National Council for the Humanities, Sciences and Technology (CONACYT, CONAHCYT), grant/award no. G35326T : Investigaciones Mexicanas de la Corriente de California (IMECOCAL)

National Council for the Humanities, Sciences and Technology (CONACYT, CONAHCYT), grant/award no. GO041-T9607 : Investigaciones Mexicanas de la Corriente de California (IMECOCAL)

Secretariat of Environment and Natural Resources (SEMARNAT), grant/award no. 23804 : Investigaciones Mexicanas de la Corriente de California (IMECOCAL)

The University of California Institute for Mexico and the United States (UC MEXUS), grant/award no. CN07-125 : The Investigaciones Mexicanas de la Corriente de California (IMECOCAL) program

Coverage:

Median Latitude: 31.173926 * Median Longitude: -117.799726 * South-bound Latitude: 30.632000 * West-bound Longitude: -118.800000 * North-bound Latitude: 31.689000 * East-bound Longitude: -116.770000

Date/Time Start: 1998-01-25T08:01:00 * Date/Time End: 2016-04-13T23:01:00

Minimum DEPTH, water: 0.000 m * Maximum DEPTH, water: 999.653 m

Event(s):

AH1601_100.30 * Latitude: 31.683000 * Longitude: -116.780000 * Date/Time: 2016-01-21T18:56:00 * Campaign: * Basis: Alpha Helix * Method/Device: (CTD-RO)

AH1601_100.35 * Latitude: 31.519000 * Longitude: -117.110000 * Date/Time: 2016-01-21T22:37:00 * Campaign: * Basis: Alpha Helix * Method/Device: (CTD-RO)

AH1601_100.40 * Latitude: 31.353000 * Longitude: -117.450000 * Date/Time: 2016-01-22T02:44:00 * Campaign: * Basis: Alpha Helix * Method/Device: (CTD-RO)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Valencia-Gasti, José Augusto
2	Station label	Station		Valencia-Gasti, José Augusto
3	DATE/TIME	Date/Time		Valencia-Gasti, José Augusto		Geocode
4	LATITUDE	Latitude		Valencia-Gasti, José Augusto		Geocode
5	LONGITUDE	Longitude		Valencia-Gasti, José Augusto		Geocode
6	DEPTH, water	Depth water	m	Valencia-Gasti, José Augusto	CTD/Rosette (CTD-RO)	Geocode
7	Pressure, water	Press	dbar	Valencia-Gasti, José Augusto	CTD/Rosette (CTD-RO)
8	Temperature, water	Temp	°C	Valencia-Gasti, José Augusto	CTD/Rosette (CTD-RO)
9	Salinity	Sal		Valencia-Gasti, José Augusto	CTD/Rosette (CTD-RO)
10	Density, potential anomaly	Dens pot anomaly	kg/m³	Valencia-Gasti, José Augusto	CTD/Rosette (CTD-RO)

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

1776507 data points

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