National Climate Assessment

A federally mandated scientific assessment under the Global Change Research Act of 1990 that evaluates current and projected climate change related effects across the U.S. every four years.

The next NCA4 Webinar is on November 20th!

This five-part series will elaborate on key messages outlined in the Southeast and Caribbean chapters of the NCA4.

More information

What is the NCA4?

The NCA4 Volume II: Impact, Risks, and Adaptation in the United States, released in November 2018, builds on the NCA4 Volume I: Climate Science Special Report (CSSR), published in 2017. The CSSR provides in-depth analysis on the foundational physical science of climate change upon which much of the assessment of impacts in Volume II is based.

This page provides quick access to relevant NCA4 links, including the full reports, as well as executive summaries, summary findings, reports in brief, SE CASC NCA4 blog posts, and other related publications. Hard copies of these materials can be ordered here from the U.S. Global Change Research Program website. 

Southeast

This chapter in the NCA4, Volume II presents the most relevant impacts to consider for the Southeast region.

Explore chapter 19.

U.S. Caribbean

This chapter in the NCA4, Volume II presents the most relevant impacts to consider for the U.S. Caribbean region.

Explore chapter 20.

Tribes and Indigenous Peoples

This chapter in the NCA4, Volume II presents the most relevant impacts to consider for Tribal and Indigenous communities.

Explore chapter 15.

NCA4 Related Resources