Pacific Islands Regional Climate Assessment (PIRCA) is a collaborative effort to assess climate change indicators, impacts, and adaptive capacity of the Hawaiian archipelago and the U.S.-Affiliated Pacific Islands (USAPI). PIRCA engages federal, state, and local government agencies, non-government organizations, academia, businesses, and community groups to inform and prioritize their activities in the face of a changing climate.

More than 100 scientific experts and practitioners contributed to the 2012 PIRCA report, an integrated regional assessment that serves as a contribution to the Third National Climate Assessment. The 2012 PIRCA report examines climate change impacts in Hawai‘i and the USAPI and also assesses the adaptive capacity of Pacific Island communities.