Some journals may require you to share your data as a condition of publication. Often, data sharing policies can be found in the "Instructions for Authors" or "Author Guidelines."
Some examples of these requirements include:
A listing of specific policies include:
You can also use SHERPA Romeo to search for specific journal titles and learn more about their publishing house’s Open Access policies. These can be consulted to learn about publisher’s Open Data Requirements.
Some journals may provide a list of repositories, but as CARL and Portage point out:
...it is in our national interest to take local responsibility for the stewardship of the valuable research data produced through Canadian research [via publicly funded data repositories] and to determine which criteria and practices are appropriate for repositories that collect Canadian-produced research data. A publisher-directed approach to data repository selection could result in a situation that is at odds with our national values and standards. We support the principles outlined in UNESCO Recommendations on Open Science, that characterize open science as a global public good, stating “Open Science services should be viewed as essential research infrastructures, governed and owned by the community, and funded collectively by governments, funders and institutions reflecting the diverse interests and needs of the research community and society.”
One approach to deal with this situation is to contact Scholarly Communications Library Services for assistance around compliance with requirements that ensure data sovereignty is maintained and that any data shared is not ceded.
Some publishers require authors to create a data availability statement as part of submitting an article for publication. This statement provides information about where data may be found and under what conditions they may be accessed.
Several publisher sites discussing data availability statements are listed below.