SOCCR-2 Draft Public Comment Period (Nov 3, 2017 to Jan 12, 2018) and 4th National Climate Assessment

November 3, 2017
Washington, D.C.

*12/6/2017 update: The deadline for submission of public comments for the 2nd State of the Carbon Cycle Report (SOCCR-2) via has been extended to Friday January 12, 2018.*

*01/12/2018 update: The SOCCR-2 review site on will remain open for late comments submissions through midnight (Eastern U.S. time) Monday January 15, 2018.*

CALL FOR PUBLIC COMMENTS: 2nd State of the Carbon Cycle Report (SOCCR-2),

CALL FOR PUBLIC COMMENTS:Fourth National Climate Assessment (NCA4) Vol. II Third Order Draft and

FINAL RELEASE: Climate Science Special Report. The Climate Science Special Report, Volume I of the NCA4


Starting Friday Nov 3, 2017 at 2 pm Eastern U.S. time, the fourth order DRAFT of the 2nd State of the Carbon Cycle Report (SOCCR-2) is available for download and for public comments via

The third order Draft of the 4th National Climate Assessment (NCA4) Vol II for public review via and the final Climate Science Special Report (CSSR or NCA4 vol I) via are also available for download.

All are welcome to provide feedback on the Draft SOCCR-2 and the Draft NCA4 Vol. II via and to publicize this request for public comments to improve the drafts.

All review comments must be submitted via

For background information on SOCCR-2, please see here.

SOCCR-2 is a technical, scientific assessment focused on North American land and adjacent oceans’ carbon cycle processes, stocks, fluxes, and interactions with global-scale carbon budgets and climate change impacts in managed and unmanaged systems as addressed in and related to the U.S. Carbon Cycle Science Plan (2011), the U.S. Global Change Research Program (USGCRP) 2012-2021 Strategic Plan and the Global Change Research Act or GCRA (1990). This special report provides an update to the carbon cycle science presented in the Third National Climate Assessment (NCA3) released in 2014 and the 1st State of the Carbon Cycle Report (SOCCR-1) released in 2007. The draft findings in SOCCR-2 are based on a large U.S. and international body of scientific, peer-reviewed research, as well as a number of other publicly available sources, including well-established and carefully evaluated observational and modeling datasets. The final SOCCR-2 report is expected to be released mid-2018. SOCCR-2 informs NCA4 which is expected in Dec 2018.

The SOCCR-2 Public Comment Period runs from 3 November 2017 to 12 January 2018. All comments must be input via this USGCRP Review and Comment System

Announcements from the  USGCRP are available here.

The SOCCR-2 timeline, showing review steps, is reflected in the flowchart below.

Also, we will be discussing these reports at the Fall 2017 American Geophysical Meetings. Please join us!

Tues, Dec 12, 2017

•SOCCR-2 Town Hall (TH23I) 12:30p – 1:30p (Room 280-282)
Thur Dec 14
•SOCCR-2 Poster Session B41G  8:00 - 12:20 Poster Hall D-F
Tuesday Dec 12
•Climate Science Special Report Union Session (U23A)1:40p – 3:40p (Room E2)
Wed, Dec 13
–8:00a – 10:00a (Room 267-268) Sustained Scientific Assessment Oral Session (GC31H)
–1:40p – 6:00p (Poster Hall D-F) Sustained Assessment Poster Session (GC33E)
•Visit the USGCRP Booth (#745)


 Please use #SOCCR2 with #NCA4 for spreading the word!