US Carbon Cycle SOCCR-2 Report

State of the Carbon Cycle & 4th National Climate Assessment Drafts Call for Public Comments

Photo of Gyami

Gyami Shrestha, Ph.D.
U.S. Carbon Cycle Science
Program Office Director
  • Reports available for download via
  • The fourth-order draft of the 2nd State of the Carbon Cycle Report (SOCCR-2)
  • The third-order draft of the 4th National Climate Assessment (NCA4), Vol II

Please help publicize this request for public comments to improve the drafts. Submit comments via the same website:

Also available now: The final Climate Science Special Report  (CSSR, or NCA4 Vol I). Download via

Details :  United States Carbon Cycle Science Program The SOCCR-2 draft has been released for public review. This is a major milestone.

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