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Representation of dissolved organic carbon in the JULES land surface model (vn4.4_JULES-DOCM)
Nakhavali, Mahdi (University of Exeter. College of Engineering, Mathematics, and Physical Sciences)
Friedlingstein, Pierre (University of Exeter. College of Engineering, Mathematics and Physical Sciences)
Lauerwald, Ronny (University of Exeter. College of Engineering, Mathematics and Physical Sciences)
Tang, Jing (Københavns universitet. Department of Biology)
Chadburn, Sarah (University of Exeter. College of Engineering, Mathematics and Physical Sciences)
Camino Serrano, Marta (Centre de Recerca Ecològica i Aplicacions Forestals)
Guenet, Bertrand (Laboratoire des Sciences du Climat et de l'Environnement)
Harper, Anna B. (University of Exeter. College of Engineering, Mathematics, and Physical Science)
Walmsley, David (Leuphana Universität Lüneburg)
Peichl, Matthias (Sveriges lantbruksuniversitet)
Gielen, Bert (University of Antwerp. Department of Biology)

Date: 2018
Abstract: Current global models of the carbon (C) cycle consider only vertical gas exchanges between terrestrial or oceanic reservoirs and the atmosphere, thus not considering the lateral transport of carbon from the continents to the oceans. Therefore, those models implicitly consider all of the C which is not respired to the atmosphere to be stored on land and hence overestimate the land C sink capability. A model that represents the whole continuum from atmosphere to land and into the ocean would provide a better understanding of the Earth's C cycle and hence more reliable historical or future projections. A first and critical step in that direction is to include processes representing the production and export of dissolved organic carbon in soils. Here we present an original representation of dissolved organic C (DOC) processes in the Joint UK Land Environment Simulator (JULES-DOCM) that integrates a representation of DOC production in terrestrial ecosystems based on the incomplete decomposition of organic matter, DOC decomposition within the soil column, and DOC export to the river network via leaching. The model performance is evaluated in five specific sites for which observations of soil DOC concentration are available. Results show that the model is able to reproduce the DOC concentration and controlling processes, including leaching to the riverine system, which is fundamental for integrating terrestrial and aquatic ecosystems. Future work should include the fate of exported DOC in the river system as well as DIC and POC export from soil.
Note: Número d'acord de subvenció EC/H2020/703813
Note: Número d'acord de subvenció EC/H2020/643052
Note: Número d'acord de subvenció EC/H2020/610028
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Language: Anglès
Document: article ; recerca ; publishedVersion
Published in: Geoscientific model development, Vol. 11 (2018) , p. 593–609,, ISSN 1991-959X

DOI: 10.5194/gmd-11-593-2018


17 p, 3.5 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
Articles > Research articles
Articles > Published articles

 Record created 2018-04-25, last modified 2018-07-28



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