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CTD Derived Products

CalCOFI CTD Derived Hydrographic Products

calcofi_ctd-derivedCalCOFIunstatedv2026.10.01

years
1993–2025
observations
1,326,183
sampling events
9,275
stations
97
variables
2
depth
1–3630 m
1993 · 21,620 obs1994 · 43,985 obs1995 · 30,469 obs1996 · 46,164 obs1997 · 42,988 obs1998 · 48,999 obs1999 · 40,488 obs2000 · 39,442 obs2001 · 38,952 obs2002 · 39,416 obs2003 · 48,462 obs2004 · 49,658 obs2005 · 41,146 obs2006 · 44,987 obs2007 · 43,077 obs2008 · 42,242 obs2009 · 47,526 obs2010 · 44,968 obs2011 · 46,698 obs2012 · 37,852 obs2013 · 44,186 obs2014 · 35,074 obs2015 · 41,582 obs2016 · 47,774 obs2017 · 42,728 obs2018 · 37,306 obs2019 · 30,354 obs2020 · 32,612 obs2021 · 34,704 obs2022 · 30,776 obs2023 · 43,928 obs2024 · 35,696 obs2025 · 30,324 obs
observations per year, 1993–2025
st70-ln60 · 3,194 obs · 2003–2025st80-ln60 · 2,830 obs · 2003–2025st90-ln60 · 1,862 obs · 2003–2025st70-ln63.3 · 2,430 obs · 2003–2025st100-ln60 · 142 obs · 2003–2003st80-ln63.3 · 2,798 obs · 2003–2025st90-ln63.3 · 2,198 obs · 2003–2025st70-ln66.7 · 7,744 obs · 1998–2025st100-ln63.3 · 128 obs · 2003–2003st80-ln66.7 · 7,706 obs · 1998–2025st90-ln66.7 · 4,654 obs · 2003–2025st70-ln70 · 4,186 obs · 1995–2025st100-ln66.7 · 696 obs · 2003–2007st80-ln70 · 3,414 obs · 1998–2025st90-ln70 · 2,900 obs · 2003–2025st70-ln73.3 · 3,090 obs · 1998–2025st100-ln70 · 150 obs · 2003–2003st80-ln73.3 · 3,050 obs · 1998–2025st90-ln73.3 · 2,694 obs · 2003–2025st70-ln76.7 · 19,942 obs · 1993–2025st100-ln73.3 · 474 obs · 2003–2004st80-ln76.7 · 19,902 obs · 1993–2025st90-ln76.7 · 20,740 obs · 1993–2025st70-ln80 · 20,448 obs · 1993–2025st100-ln76.7 · 19,060 obs · 1993–2025st80-ln80 · 21,288 obs · 1993–2025st90-ln80 · 24,693 obs · 1993–2025st70-ln83.3 · 20,939 obs · 1993–2025st100-ln80 · 21,942 obs · 1993–2025st80-ln83.3 · 20,694 obs · 1993–2025st90-ln83.3 · 20,216 obs · 1993–2025st70-ln86.7 · 21,066 obs · 1993–2025st100-ln83.3 · 20,310 obs · 1993–2025st80-ln86.7 · 21,245 obs · 1993–2025st110-ln83.3 · 19,144 obs · 1993–2025st90-ln86.7 · 20,834 obs · 1993–2025st70-ln90 · 22,224 obs · 1993–2025st100-ln86.7 · 20,749 obs · 1993–2025st80-ln90 · 21,302 obs · 1993–2025st110-ln86.7 · 19,711 obs · 1993–2025st90-ln90 · 31,460 obs · 1993–2025st70-ln93.3 · 21,004 obs · 1993–2025st100-ln90 · 23,074 obs · 1993–2025st80-ln93.3 · 21,868 obs · 1993–2025st110-ln90 · 21,394 obs · 1993–2025st90-ln93.3 · 21,702 obs · 1993–2025st120-ln90 · 21,866 obs · 1993–2025st100-ln93.3 · 21,198 obs · 1993–2025st110-ln93.3 · 21,507 obs · 1993–2025st120-ln93.3 · 20,846 obs · 1993–2025st60-ln60 · 3,550 obs · 2003–2025st55-ln60 · 684 obs · 2003–2025st50-ln63.3 · 612 obs · 2003–2025st55-ln63.3 · 1,434 obs · 2003–2025st60-ln63.3 · 2,044 obs · 2003–2025st50-ln66.7 · 4,154 obs · 1998–2025st55-ln66.7 · 5,628 obs · 1998–2025st60-ln66.7 · 6,716 obs · 1998–2025st50-ln70 · 1,800 obs · 1998–2025st55-ln70 · 3,352 obs · 1998–2025st60-ln70 · 4,594 obs · 1998–2025st50-ln73.3 · 1,008 obs · 1997–2025st55-ln73.3 · 3,150 obs · 1998–2025st60-ln73.3 · 3,318 obs · 1997–2025st50-ln76.7 · 12,586 obs · 1993–2025st55-ln76.7 · 18,526 obs · 1993–2025st60-ln76.7 · 19,128 obs · 1993–2025st45-ln80 · 262 obs · 1999–2008st50-ln80 · 4,940 obs · 1993–2025st55-ln80 · 19,972 obs · 1993–2025st60-ln80 · 21,318 obs · 1993–2025st40-ln83.3 · 10,098 obs · 1993–2025st45-ln83.3 · 22,192 obs · 1993–2025st50-ln83.3 · 5,917 obs · 1993–2025st30-ln86.7 · 296 obs · 2004–2024st55-ln83.3 · 19,738 obs · 1993–2025st35-ln86.7 · 25,192 obs · 1993–2025st60-ln83.3 · 20,394 obs · 1993–2025st40-ln86.7 · 23,496 obs · 1993–2025st45-ln86.7 · 19,530 obs · 1993–2025st50-ln86.7 · 4,812 obs · 1993–2025st30-ln90 · 27,488 obs · 1993–2025st55-ln86.7 · 19,692 obs · 1993–2025st35-ln90 · 35,196 obs · 1993–2025st60-ln86.7 · 20,088 obs · 1993–2025st40-ln90 · 310 obs · 1997–1997st45-ln90 · 20,606 obs · 1993–2025st25-ln93.3 · 6,646 obs · 1993–2025st30-ln93.3 · 41,848 obs · 1993–2025st55-ln90 · 20,328 obs · 1993–2025st35-ln93.3 · 20,356 obs · 1993–2025st60-ln90 · 21,174 obs · 1993–2025st40-ln93.3 · 20,632 obs · 1993–2025st45-ln93.3 · 20,834 obs · 1993–2025st50-ln93.3 · 21,132 obs · 1993–2025st55-ln93.3 · 20,178 obs · 1993–2025st60-ln93.3 · 20,526 obs · 1993–2025125°W120°W30°N35°N
97 CalCOFI stations sampled, sized by observations, over the survey grid.

Overview

Hydrographic products DERIVED from the CalCOFI CTD cast profiles rather than measured: spice (spiciness at 0 dbar, TEOS-10) and the sensor-pair averaged sigma-theta at every published CTD depth; per cast, the mixed-layer depth by three criteria, the depth and value of the chlorophyll-a maximum and the chlorophyll-a integrated over 0-200 m; and the relative geostrophic velocity between adjacent stations of each CalCOFI line, referenced to 500 dbar. Computed from the full-resolution 1 m bins of the CalCOFI CTD Cast Files after the provider’s quality flags are applied.

Keywords
DensityOcean currentsOcean mixed layerChlorophyll

Open with the provider

  • Q06 — proposed

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

Coverage

2 variables

sigma_theta_ave kg/m3spiciness0 kg/m3

Access

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Cite

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

CalCOFI. (2026). CalCOFI CTD Derived Hydrographic Products (from the CalCOFI CTD Cast Files). CalCOFI.io. https://calcofi.io/workflows/ingest_calcofi_ctd-derived.html
BibTeX 
@misc{calcofi_ctd-derived,
  title        = {CalCOFI CTD Derived Hydrographic Products},
  howpublished = {CalCOFI. (2026). CalCOFI CTD Derived Hydrographic Products (from the CalCOFI CTD Cast Files). CalCOFI.io. https://calcofi.io/workflows/ingest_calcofi_ctd-derived.html},
  year         = {2026}
}

…and the release it came from

CalCOFI (2026). CalCOFI Integrated Database, release v2026.10.01 [Data set]. Scripps Institution of Oceanography, NOAA Fisheries, and California Department of Fish and Wildlife. https://calcofi.io/db-schema/?v=v2026.10.01
BibTeX 
@misc{calcofi_release_v2026_10_01,
  title     = {CalCOFI Integrated Database, release v2026.10.01},
  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=v2026.10.01}
}
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