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CTD Cast Files

CalCOFI CTD Cast Files

calcofi_ctd-castCalCOFIunstatedv2026.10.14ingested

years
1993–2026
observations
18,739,547
sampling events
9,677
stations
113
variables
44
depth
0.968–3630 m
1993 · 252,581 obs1994 · 510,693 obs1995 · 353,064 obs1996 · 523,222 obs1997 · 499,574 obs1998 · 557,147 obs1999 · 511,233 obs2000 · 489,567 obs2001 · 471,266 obs2002 · 474,115 obs2003 · 552,589 obs2004 · 611,643 obs2005 · 565,179 obs2006 · 610,783 obs2007 · 584,315 obs2008 · 555,256 obs2009 · 692,859 obs2010 · 692,946 obs2011 · 749,951 obs2012 · 594,562 obs2013 · 717,525 obs2014 · 570,033 obs2015 · 761,555 obs2016 · 763,790 obs2017 · 706,650 obs2018 · 603,179 obs2019 · 479,185 obs2020 · 507,821 obs2021 · 480,203 obs2022 · 385,144 obs2023 · 572,814 obs2024 · 478,848 obs2025 · 518,880 obs2026 · 341,375 obs
observations per year, 1993–2026
st53-ln60 · 9,454 obs · 2003–2026st60-ln60 · 43,145 obs · 2003–2026st70-ln60 · 44,669 obs · 2003–2026st80-ln60 · 38,877 obs · 2003–2026st90-ln60 · 25,497 obs · 2003–2026st100-ln60 · 1,313 obs · 2003–2003st52-ln63.3 · 9,007 obs · 2003–2026st55-ln63.3 · 20,027 obs · 2003–2026st60-ln63.3 · 28,943 obs · 2003–2026st70-ln63.3 · 35,093 obs · 2003–2026st80-ln63.3 · 37,383 obs · 2003–2026st90-ln63.3 · 29,970 obs · 2003–2026st100-ln63.3 · 1,183 obs · 2003–2003st50-ln66.7 · 56,969 obs · 1998–2026st55-ln66.7 · 76,012 obs · 1998–2026st60-ln66.7 · 65,826 obs · 1998–2026st65-ln66.7 · 30,564 obs · 1998–2011st70-ln66.7 · 67,217 obs · 1998–2026st75-ln66.7 · 31,512 obs · 2004–2011st80-ln66.7 · 67,133 obs · 1998–2026st85-ln66.7 · 27,886 obs · 2004–2011st90-ln66.7 · 48,699 obs · 2003–2026st95-ln66.7 · 3,259 obs · 2007–2007st100-ln66.7 · 4,286 obs · 2003–2007st51-ln70 · 24,766 obs · 1998–2026st55-ln70 · 45,292 obs · 1998–2026st60-ln70 · 60,571 obs · 1998–2026st70-ln70 · 59,986 obs · 1995–2026st80-ln70 · 46,407 obs · 1998–2026st90-ln70 · 40,835 obs · 2003–2026st100-ln70 · 1,390 obs · 2003–2003st50-ln73.3 · 15,800 obs · 1997–2026st55-ln73.3 · 43,495 obs · 1998–2026st60-ln73.3 · 40,844 obs · 1998–2026st70-ln73.3 · 43,621 obs · 1998–2026st80-ln73.3 · 41,516 obs · 1998–2026st90-ln73.3 · 36,951 obs · 2003–2026st100-ln73.3 · 3,930 obs · 2003–2004st49-ln76.7 · 52,333 obs · 1993–2026st51-ln76.7 · 141,955 obs · 1993–2026st55-ln76.7 · 259,720 obs · 1993–2026st60-ln76.7 · 265,537 obs · 1993–2026st70-ln76.7 · 278,452 obs · 1993–2026st80-ln76.7 · 277,401 obs · 1993–2026st90-ln76.7 · 286,833 obs · 1993–2026st100-ln76.7 · 261,038 obs · 1993–2026st50.5-ln80 · 14,856 obs · 2004–2026st51-ln80 · 67,137 obs · 1993–2026st55-ln80 · 287,556 obs · 1993–2026st60-ln80 · 303,844 obs · 1993–2026st70-ln80 · 290,923 obs · 1993–2026st80-ln80 · 301,063 obs · 1993–2026st90-ln80 · 344,805 obs · 1993–2026st100-ln80 · 305,884 obs · 1993–2026st43.5-ln81.7 · 15,846 obs · 2004–2026st46.9-ln81.8 · 302,485 obs · 1993–2026st39.4-ln83.3 · 12,503 obs · 1998–2026st40.6-ln83.3 · 39,251 obs · 1993–2026st42-ln83.3 · 118,651 obs · 1993–2026st51-ln83.3 · 95,566 obs · 1993–2026st55-ln83.3 · 281,310 obs · 1993–2026st60-ln83.3 · 289,598 obs · 1993–2026st70-ln83.3 · 294,703 obs · 1993–2026st80-ln83.3 · 292,076 obs · 1993–2026st90-ln83.3 · 287,773 obs · 1993–2026st100-ln83.3 · 287,721 obs · 1993–2026st110-ln83.3 · 268,246 obs · 1993–2026st35.8-ln85.4 · 14,173 obs · 2004–2026st33-ln86.7 · 59,583 obs · 1993–2026st35-ln86.7 · 284,107 obs · 1993–2026st40-ln86.7 · 336,884 obs · 1993–2026st45-ln86.7 · 276,433 obs · 1993–2026st50-ln86.7 · 76,934 obs · 1993–2026st55-ln86.7 · 282,317 obs · 1993–2026st60-ln86.7 · 286,318 obs · 1993–2026st70-ln86.7 · 297,816 obs · 1993–2026st80-ln86.7 · 303,073 obs · 1993–2026st90-ln86.7 · 296,115 obs · 1993–2026st100-ln86.7 · 294,776 obs · 1993–2026st110-ln86.7 · 277,440 obs · 1993–2026st32.5-ln86.8 · 19,795 obs · 2004–2026st30.1-ln88.5 · 16,748 obs · 2004–2026st27.7-ln90 · 18,706 obs · 2004–2026st28-ln90 · 74,941 obs · 1993–2026st30-ln90 · 294,992 obs · 1993–2026st35-ln90 · 215,816 obs · 1993–2026st37-ln90 · 296,243 obs · 1993–2026st45-ln90 · 288,178 obs · 1993–2026st53-ln90 · 286,653 obs · 1993–2026st60-ln90 · 304,106 obs · 1993–2026st70-ln90 · 316,256 obs · 1993–2026st80-ln90 · 301,673 obs · 1993–2026st90-ln90 · 426,268 obs · 1993–2026st100-ln90 · 325,698 obs · 1993–2026st110-ln90 · 301,366 obs · 1993–2026st120-ln90 · 307,364 obs · 1993–2026st26.4-ln91.7 · 17,248 obs · 2004–2026st26.7-ln93.3 · 73,123 obs · 1993–2026st28-ln93.3 · 291,363 obs · 1993–2026st30-ln93.3 · 291,574 obs · 1993–2026st35-ln93.3 · 285,624 obs · 1993–2026st40-ln93.3 · 289,344 obs · 1993–2026st45-ln93.3 · 290,305 obs · 1993–2026st50-ln93.3 · 295,921 obs · 1993–2026st55-ln93.3 · 282,101 obs · 1993–2026st60-ln93.3 · 287,740 obs · 1993–2026st70-ln93.3 · 296,501 obs · 1993–2026st80-ln93.3 · 308,392 obs · 1993–2026st90-ln93.3 · 304,989 obs · 1993–2026st100-ln93.3 · 297,381 obs · 1993–2026st110-ln93.3 · 303,658 obs · 1993–2026st120-ln93.3 · 291,483 obs · 1993–2026st26.4-ln93.4 · 17,634 obs · 2003–2026125°W120°W30°N35°N
113 CalCOFI stations sampled, sized by observations, over the survey grid.

Overview

CTD downcast profiles with temperature, salinity, oxygen, fluorescence, and other sensors at standard depths. 1 m-binned final data for 1993-2002 come from the SIO-CalCOFI Technical Group’s own archive (J. Wilkinson), which covers the decade calcofi.org does not publish finals for; 1998 and 2003 onward come from calcofi.org. Where both publish the same cruise, calcofi.org is used; the two agree on 130 of 140 comparable files, and the four cruises that differ are recorded in question calcofi_ctd-cast_20.

Creators
Rasmus Swalethorp (UCSD SIO)
Keywords
Water temperatureOcean salinityOxygenWater pressureTemperatureSalinityDissolved OxygenDissolved NutrientsPhytoplankton Biomass and DiversityCalCOFI Network

Open with the provider

  • Q28 license — proposed
  • Q29 pi_names — proposed

calcofi.org page ↗source ↗ingest notebook ↗record JSON JSON-LD

Coverage

44 variables

obs_env profile · one value at each depth of a cast · 18,739,547 values · 1993–2026 · 44 variables

beam_attenuation 1/m 604,347btl_ammonium umol/L 69,506btl_chlorophyll_a ug/L 113,161btl_depth m 156,745btl_nitrate umol/L 143,513btl_nitrite umol/L 143,171btl_phaeopigment ug/L 113,138btl_phosphate umol/L 144,162btl_silicate umol/L 144,405btl_temperature degC 143,084dynamic_height dyn m 660,543est_chlorophyll_a_cruise_corr ug/L 320,961est_chlorophyll_a_sta_corr ug/L 350,268est_nitrate_cruise_corr umol/L 313,888est_nitrate_sta_corr umol/L 295,378fluorescence_v V 688,917

all 44isus_v V 351,452oxygen_btl_ml_l ml/L 141,979oxygen_btl_umol_kg umol/kg 127,322oxygen_ml_l_1 ml/L 687,092oxygen_ml_l_1_cruise_corr ml/L 666,259oxygen_ml_l_1_sta_corr ml/L 650,869oxygen_ml_l_2 ml/L 345,537oxygen_ml_l_2_cruise_corr ml/L 324,197oxygen_ml_l_2_sta_corr ml/L 318,278oxygen_ml_l_ave_cruise_corr ml/L 666,776oxygen_ml_l_ave_sta_corr ml/L 651,142oxygen_umol_kg_1 umol/kg 669,096oxygen_umol_kg_2 umol/kg 326,415oxygen_umol_kg_ave_sta_corr umol/kg 613,609par uE/m2/s 574,359ph pH 218,416pressure dbar 689,275salinity_1 PSU 689,007salinity_1_corr PSU 671,758salinity_2 PSU 568,129salinity_2_corr PSU 551,073salinity_ave_corr PSU 672,180salinity_btl PSU 151,777sigma_theta_1 kg/m3 688,923spar uE/m2/s 489,081specific_volume_anomaly 10^-8 m3/kg 536,337temperature_ave degC 689,201transmissometer % 604,821

Full resolution only · 11

Series this dataset carries that are not canonical for any measurement, so the catalog draws no page for them: they ride the full-resolution table (obs_ctd_full) at every scan, behind the headline series above.

  • oxygen_saturation_1 Oxygen saturation sensor 1
  • oxygen_saturation_2 Oxygen saturation sensor 2
  • oxygen_umol_kg_1_cruise_corr DO sensor 1 cruise-corrected
  • oxygen_umol_kg_1_sta_corr DO sensor 1 station-corrected
  • oxygen_umol_kg_2_cruise_corr DO sensor 2 cruise-corrected
  • oxygen_umol_kg_2_sta_corr DO sensor 2 station-corrected
  • potential_temperature_1 Potential temperature sensor 1
  • potential_temperature_2 Potential temperature sensor 2
  • sigma_theta_2 Potential density sensor 2
  • temperature_1 Temperature sensor 1
  • temperature_2 Temperature sensor 2

Also contributes to

  • Carbonate System — ph
  • Nutrients & Chemistry — btl_ammonium, btl_nitrate, btl_nitrite, btl_phosphate, btl_silicate, est_nitrate_cruise_corr, est_nitrate_sta_corr, isus_v
  • Productivity & Pigments — btl_chlorophyll_a, btl_phaeopigment, est_chlorophyll_a_cruise_corr, est_chlorophyll_a_sta_corr, fluorescence_v, par, spar

Access

Every endpoint this dataset can be reached through, grouped by how you would use it. Each name is the link; the copy button beside it copies the address. Everything is in the release record and was answered when the release was cut.

Apps that read this dataset from the release. The icons after a name are the app’s lenses — the spatial grain it shows the data at.

CalCOFI ExplorerAcross datasetsopens on this dataset
Station ExplorerAcross datasetsopens on this dataset
Hexagon ExplorerAcross datasetsopens on this dataset
Cruise ExplorerAcross datasetsopens on this dataset
CTD TransectsOne dataset
CTD ExplorerOne dataset

Everything here is open — nothing on calcofi.io asks you to register first. If this dataset ends up in something you build or publish, register your use so it can be credited and linked back; to hear when a release changes it, stay informed. Questions: data@calcofi.io.

Cite

This dataset's own citation. What to cite, and how, is a chapter of the docs book.

CalCOFI. (2023). CalCOFI CTD Cast Files. CalCOFI.org.
BibTeX 
@misc{calcofi_ctd-cast,
  title        = {CalCOFI CTD Cast Files},
  howpublished = {CalCOFI. (2023). CalCOFI CTD Cast Files. CalCOFI.org.},
  year         = {2023}
}

…and the release it came from

CalCOFI (2026). CalCOFI Integrated Database, release v2026.10.14 [Data set]. Scripps Institution of Oceanography, NOAA Fisheries, and California Department of Fish and Wildlife. https://calcofi.io/db-schema/?v=v2026.10.14
BibTeX 
@misc{calcofi_release_v2026_10_14,
  title     = {CalCOFI Integrated Database, release v2026.10.14},
  author    = {CalCOFI},
  year      = {2026},
  publisher = {Scripps Institution of Oceanography, NOAA Fisheries, and California Department of Fish and Wildlife},
  url       = {https://calcofi.io/db-schema/?v=v2026.10.14}
}

Source files

The original inputs the ingest notebook read, mirrored nightly from the shared Drive to the public files bucket — 387 files, 18.4 GB.

and 375 more
© 2026 CalCOFI · calcofi.io