CCHDO (CLIVAR and Carbon Hydrographic Data Office) supports oceanographic research by providing access to high quality, global, vessel-based CTD and hydrographic data from GO-SHIP, WOCE, CLIVAR and other repeat hydrography programs. These data are openly accessible and served in standardized community formats (WHP-Exchange, WOCE, and netCDF). CCHDO also manages public and non-public CTD data for use by the global Argo and OceanSITES programs.
Keyword search is provided by the search box in the upper right of the page. Other options include:
Map Search lets you draw a box on a map to search for station data.
Advanced Search lets you finely define key word, bounding box, and temporal searches.
Here are some searches which may be of general interest:
A set of CCHDO data holdings are now available through NOAA's ERDDAP services. This popular application provides a flexible interface for evaluating and downloading CCHDO data in nearly 50 formats. A full list of the parameters available through this ERDDAP instance is available here.
It is now possible to browse and select specific profile data and with all or a subset of parameters.
The 2022 occupation of US GO-SHIP P02 was conducted in the North Pacific Ocean from 30 April - 16 July. A total of 241 rosette/CTD/LADCP stations were occupied on a zonal transect running approximately along latitude 30N. Measurements include reference quality CTDO casts with bottle sampling for salinity, oxygen, nutrients, a host of carbon parameters, and CFCs.
Data files in standard CCHDO formats can be accessed here:
These data consist mostly of cleaned bottle data from WOCE Hydrographic Program sections and their subsequent repeats. Sections and casts are organized, superfluous stations and data rows deleted, and errors are corrected. Data are available to download in data formats including Java OceanAtlas (JOA) binary and ASCII/CSV WHP-Exchange (widely readable by ODV, Excel, MatLab, JOA, etc.).
CCHDO has begun producing CF compliant netCDF files to improve interoperability and machine readability. These will be offered in addition to the existing formats, and will roll out over time as data are converted.
40 cruises of CTD data from Canadian Line P are now available through CCHDO. These data span the years 2007 through early 2020, and are situated off British Columbia ~125-145W and ~48-50N.