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Ocean Acidification Data Portal:

Ocean Acidification Data Portal: Help

The U.S. NODC Ocean Acidification Data Portal is a search tool that enables users to discover, select, and retrieve ocean acidification related data sets in their original form from the archive holdings of the National Oceanographic Data Center (NODC). Data are selected based on five user-selected search criteria: Variables/Parameters, Observation Categories, Observation Dates, Geographic Coverage, and Additional Terms. The data are selected based on the collection level metadata available for each data set. Additional information can be found in the NODC Ocean Acidification Scientific Data Stewardship (OADS) web pages. If you have any comments or questions, please direct them to noaa.ocads (a) noaa.gov.

Variables / Parameters

Variables/parameters refer to the observed or derived (calculated) properties of a study (for example, temperature, salinity, dissolved oxygen, chlorophyll, larval survival rate).

Observation Category

Observation Category is a list of terms listing the mechanism or manner in which the observational data were collected, for example, time-series, surface underway data, profile data, laboratory experiment, etc.

Start Date and End Date

Start Date and End Date are defined as the starting and ending day, month, and year of the observations, respectively. Please note that this applies to the overall collection level of each data set and not necessarily associated with individual variables. It is possible that a particular variable is not observed across the whole temporal coverage of the overall data set.

Geographic Coverage

Geographic Coverage refers to the spatial coverage (latitude and longitude bounding box) of the overall observations. Please note that this applies to the overall collection level of each data set and not necessarily associated with individual variables. It is possible that a particular variable will not be not observed across the whole geographic coverage of the overall data collection.

Additional Terms

This is a free text search tool. The text you enter here will be searched against the content of every metadata record for every data set in the NODC archive exactly as you enter it in the box.

Search example

Imagine you are looking for data sets that have both “Dissolved Inorganic Carbon” and “Total Alkalinity” measured from CTD profiles, from the year 2000 to present, in the Atlantic Ocean.

Here is how you can do the search:

  1. In the Variables / Parameters section: check the checkboxes for “Dissolved inorganic carbon” and “Alkalinity”, and select the “Match all of the following” radio button.
  2. In the Observation Categories section: select “Profile/CTD”.
  3. In the Observation Dates section: enter “2000” in the Start date box.
  4. In the Geographic Coverage section: hold the “shift” key, and draw a rectangle across the Atlantic Ocean. Modify the the input for latitude and longitude below the map if needed.
  5. Press “Search”.