ORCHIDEE-LEAK_r5919

This version of ORCHIDEE has been used in “How simulations of the land carbon sink are biased by ignoring fluvial carbon transfers – A case study for the Amazon basin” by R. Lauerwald, P. Regnier, B. Guenet, P. Friedlingstein, P. Ciais << Reference to be added as soon as the manuscript is available >>.

Abstract

Exports of terrestrial carbon (C) through the river network of the Amazon basin are non-negligible for its C budget, but have to date been ignored in land surface models used for future projections. Here, we utilize a new land surface model that simulates the coupled evolution of the terrestrial C balance and river C fluxes from 1860 to 2100. The terrestrial net-uptake of atmospheric CO2, the terrestrial C storage, but also the leakage of terrestrial C through the river network are simulated to increase over the simulation period. CO2 emissions from the river-floodplain network and fluvial exports of C to the coast increase by one fourth at the end of the 21st century, but harvest as additional lateral C export and the growth rate of terrestrial C stocks increase even more. While nearly half of the terrestrial net-uptake of atmospheric CO2 is channeled to the ocean until the mid-20th century, this proportion decreases down to about 10% at the end of the 21st century. Moreover, we estimate that neglecting fluvial C exports from the Amazon basin leads to a 20% underestimate of the terrestrial net-uptake of atmospheric CO2 over the historical period 1861-2010, while at the same time, the increase in terrestrial C storage is overestimated by 5.1%. For the future projections, the biases are lower due to the decreasing relative importance of fluvial C transfers in the C balance of the Amazon basin.

Code access

• See the version on the webinterface here : ​https://forge.ipsl.jussieu.fr/orchidee/browser/branches/publications/ORCHIDEE-LEAK-r5919

• Extract it on a terminal as follow, type anonymous as password:

  svn co --username anonymous svn://forge.ipsl.jussieu.fr/orchidee/branches/publications/ORCHIDEE-LEAK-r5919  ORCHIDEE
  

Metadata

DOI	TBD
Creator	Ronny Lauerwald
Affiliation	Université Libre de Bruxelles
Title	ORCHIDEE-LEAK revision 5919
Publisher	Institut Pierre Simon Laplace (IPSL)
PublicationYear	2019
ResourceType	Software
Rights	This software is distributed under the CeCILL license
rightsURI	​http://www.cecill.info/
Subject	Land surface model, CO2, Dissolved Organic Carbon, Amazon River
DataManager	Karim Ramage (IPSL)
DataCurator	Josefine Ghattas (IPSL)
ContactPerson	Ronny Lauerwald (Université Libre de Bruxelles)
FundingReference	EU Horizon 2020 research and innovation program under under grant agreement No. 776810 (project VERIFY)