CLIVAR/Carbon Hydrographic Sections - international website:
http://www.clivar.org/carbon_hydro

US Carbon Cycle Science Web Page:
http://www.carboncyclescience.gov/

• US Carbon Cycle Science Plan: 
  http://www.carboncyclescience.gov/planning.html#plan

Large Scale Carbon Observation Program, Ocean and Atmospheres: http://www.ogp.noaa.gov/mpe/gcc/co2/observingplan/index.htm

US CLIVAR:
http://www.usclivar.org/

• Implementation Plan:
  http://www.usclivar.org/Pubs/US_CLIVAR_IP.PDF
• Detailed Plans by Region
  • Pan American Region:
    http://www.usclivar.org/Pubs/PANAM_PLAN_V4.1_ALL.PDF
  • Atlantic Region:
    http://www.usclivar.org/Pubs/ATLANTIC_IMPL_DEC00.PDF
  • Pacific Region: 
    http://www.usclivar.org/Pubs/Pacific_Impl.pdf

NOAA-OGP:  
http://www.ogp.noaa.gov/mpe/gcc/index.htm

NOAA Ocean Carbon Dioxide and Tracer Program: An Integrated Approach to Decadal Ocean Climate Change Studies:
http://www.pmel.noaa.gov/whitepapers/ocdtp-summary.html

International CLIVAR (US mirror site)
http://www.clivar.ucar.edu/

US JGOFS:
http://usjgofs.whoi.edu/

US WOCE:
http://www-ocean.tamu.edu/WOCE/uswoce.html

CLIVAR and Carbon Hydrographic Data Office (CCHDO/WHPO):
http://cchdo.ucsd.edu/