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Representation of dissolved organic carbon in the JULES land surface model (vn4.4_JULES-DOCM)

Nakhavali, Mahdi and Friedlingstein, Pierre and Lauerwald, Ronny and Tang, Jing and Chadburn, Sarah and Camino-Serrano, Marta and Guenet, Bertrand and Harper, Anna and Walmsley, David and Peichl, Matthias and Gielen, Bert (2018). Representation of dissolved organic carbon in the JULES land surface model (vn4.4_JULES-DOCM). Geoscientific Model Development. 11, 593-609
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Official URL: https://doi.org/10.5194/gmd-11-593-2018

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.

Authors/Creators:Nakhavali, Mahdi and Friedlingstein, Pierre and Lauerwald, Ronny and Tang, Jing and Chadburn, Sarah and Camino-Serrano, Marta and Guenet, Bertrand and Harper, Anna and Walmsley, David and Peichl, Matthias and Gielen, Bert
Title:Representation of dissolved organic carbon in the JULES land surface model (vn4.4_JULES-DOCM)
Series/Journal:Geoscientific Model Development (1991-9603)
Year of publishing :2018
Volume:11
Page range:593-609
Number of Pages:17
Publisher:Copernicus Publications, The European Geosciences Union
ISSN:1991-9603
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Geosciences, Multidisciplinary
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Environmental Sciences related to Agriculture and Land-use
Agrovoc terms:carbon cycle, simulation models
Keywords:carbon, carbon cycle, dissolved organic C (DOC), The Joint UK Land Environment Simulator (JULES-DOCM)
URN:NBN:urn:nbn:se:slu:epsilon-e-4866
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4866
ID Code:15362
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:25 May 2018 06:10
Metadata Last Modified:25 May 2018 06:10

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