Reefs at Risk Revisited: Climate-Related Threats Data

Under the Reefs at Risk Revisited project, WRI and its partners have developed a new, detailed assessment of the status of and threats to the world’s coral reefs. This information is intended to raise awareness about the location and severity of threats to coral reefs. These results can also catalyze opportunities for changes in policy and practice that could safeguard coral reefs and the benefits they provide to people for future generations.

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Global (i.e., climate-related) threats to the world's coral reefs were analyzed. These include: past thermal stress (i.e., warming seas and bleaching over the last decade), future thermal stress (ie., projections of future warming in 2030 and 2050); and ocean acidification (i.e., reduced ocean pH in the present, 2030, and 2050). Future thermal stress and ocean acidification were integrated with local threats into the Integrated Local and Global Threat indices for 2030 and 2050. For additional information see:

The data files include GIS data sets and KML files for use in Google Earth and other map applications that support KML.

See the README file for source information.


The model relies on available data and predicted relationships but cannot capture all aspects of the dynamic interactions between people/environment and coral reefs. The threat indicators gauge current and potential risks associated with human activities/climate change. A strength of the analysis lies in its use of regionally consistent data sets to develop globally consistent indicators of human pressure on coral reefs. However, the model is not perfect, and omissions and other errors in the data sets are inevitable.


World Resources Institute, Reefs at Risk Revisited, 2011.

Access & Use Information

License: Creative Commons Attribution 4.0 International License. Full license text available at Creative Commons Attribution 4.0


Project: Reefs at Risk

Page Last Updated: August 19, 2016

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