@Article{CiaisBCLPCHJJJKLPPPPPQVRSSSTYWZ:2022:DeMeEs,
               author = "Ciais, Philippe and Bastos, Ana and Chevallier, Fr{\'e}d{\'e}ric 
                         and Lauerwald, Ronny and Poulter, Ben and Canadell, Josep G. and 
                         Hugelius, Gustaf and Jackson, Robert B. and Jain, Atul and Jones, 
                         Matthew and Kondo, Masayuki and Luijkx, Ingrid t. and Patra, 
                         Prabir K. and Peters, Wouters and Pongratz, Julia and Petrescu, 
                         Ana Maria Roxana and Piao, Shilong and Qiu, Chungjin and Von 
                         Randow, Celso and Regnier, Pierre and Saunois, Marielle and 
                         Scholes, Robert and Shvidenko, Anatoly and Tian, Hanqin and Yang, 
                         Hui and Wang, Xuhui and Zheng, Bo",
          affiliation = "CEA-CNRS-UVSQ-U.P.Saclay and {Max-Planck-Institut f{\"u}r 
                         Biogeochemie} and CEA-CNRS-UVSQ-U.P.Saclay and 
                         CEA-CNRS-UVSQ-U.P.Saclay and {NASA Goddard Space Flight Center} 
                         and {CSIRO Oceans and Atmosphere} and {Stockholm University} and 
                         {Stanford University} and {University of Illinois} and {University 
                         of East Anglia} and {National Institute for Environmental Studies} 
                         and {Wageningen University} and {Japan Agency for Marine-Earth 
                         Science and Technology (JAMSTEC)} and {Wageningen University} and 
                         {Ludwig-Maximilians-Universit{\"a}t M{\"u}nchen} and {Vrije 
                         Universiteit Amsterdam} and {Peking University} and 
                         CEA-CNRS-UVSQ-U.P.Saclay and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universit{\'e} Libre de Bruxelles} and 
                         CEA-CNRS-UVSQ-U.P.Saclay and {University of the Witwatersrand} and 
                         {Ecosystem Services and Management (ESM)} and {International 
                         Center for Climate and Global Change Research} and 
                         CEA-CNRS-UVSQ-U.P.Saclay and {Peking University} and 
                         CEA-CNRS-UVSQ-U.P.Saclay",
                title = "Definitions and methods to estimate regional land carbon fluxes 
                         for the second phase of the REgional Carbon Cycle Assessment and 
                         Processes Project (RECCAP-2)",
              journal = "Geoscientific Model Development",
                 year = "2022",
               volume = "15",
               number = "3",
                pages = "1289--1316",
                month = "Feb.",
             abstract = "Regional land carbon budgets provide insights into the spatial 
                         distribution of the land uptake of atmospheric carbon dioxide and 
                         can be used to evaluate carbon cycle models and to define 
                         baselines for land-based additional mitigation efforts. The 
                         scientific community has been involved in providing 
                         observation-based estimates of regional carbon budgets either by 
                         downscaling atmospheric CO2 observations into surface fluxes with 
                         atmospheric inversions, by using inventories of carbon stock 
                         changes in terrestrial ecosystems, by upscaling local field 
                         observations such as flux towers with gridded climate and remote 
                         sensing fields, or by integrating data-driven or process-oriented 
                         terrestrial carbon cycle models. The first coordinated attempt to 
                         collect regional carbon budgets for nine regions covering the 
                         entire globe in the RECCAP-1 project has delivered estimates for 
                         the decade 2000-2009, but these budgets were not comparable 
                         between regions due to different definitions and component fluxes 
                         being reported or omitted. The recent recognition of lateral 
                         fluxes of carbon by human activities and rivers that connect CO2 
                         uptake in one area with its release in another also requires 
                         better definitions and protocols to reach harmonized regional 
                         budgets that can be summed up to a globe scale and compared with 
                         the atmospheric CO2 growth rate and inversion results. In this 
                         study, using the international initiative RECCAP-2 coordinated by 
                         the Global Carbon Project, which aims to be an update to regional 
                         carbon budgets over the last 2 decades based on observations for 
                         10 regions covering the globe with a better harmonization than the 
                         precursor project, we provide recommendations for using 
                         atmospheric inversion results to match bottom-up carbon accounting 
                         and models, and we define the different component fluxes of the 
                         net land atmosphere carbon exchange that should be reported by 
                         each research group in charge of each region. Special attention is 
                         given to lateral fluxes, inland water fluxes, and land use 
                         fluxes.",
                  doi = "10.5194/gmd-15-1289-2022",
                  url = "http://dx.doi.org/10.5194/gmd-15-1289-2022",
                 issn = "1991-959X",
             language = "en",
           targetfile = "gmd-15-1289-2022.pdf",
        urlaccessdate = "14 jun. 2024"
}