Development and evaluation of CNRM Earth-System model – CNRM-ESM1

• DOI: 10.5194/gmdd-8-5671-2015
• Publication Date: 2015-07-22T13:33:08Z
• Authors: R. Séférian; C. Delire; B. Decharme; A. Voldoire; D. Salas y Melia; M. Chevallier; D. Saint-Martin; O. Aumont; J.-C. Calvet; D. Carrer; H. Douville; L. Franchistéguy; E. Joetzjer; S. Sénési
• Keywords: Biogeochemical Cycle; Carbon sink

Abstract. We introduce and document the first version of Centre National de Recherches Météorologiques Earth system model (CNRM-ESM1). This is based on physical core CNRM-CM5 employs Interactions between Soil, Biosphere Atmosphere (ISBA) module Pelagic Interaction Scheme for Carbon Ecosystem Studies (PISCES) as terrestrial oceanic components global carbon cycle. describe a preindustrial 20th century climate simulation following CMIP5 protocol. detail how various reservoirs were initialized analyze behavior cycle its prominent drivers. CNRM-ESM1 reproduces satisfactorily several aspects modern On land, reasonably captures cycling through vegetation soil, resulting in net sink 2.2 Pg C y-1. In ocean, large-scale distribution hydrodynamical biogeochemical tracers agrees well with climatology from World Ocean Atlas. The combination biological processes induces CO2 uptake 1.7 y-1 that falls within range recent estimates. Our analysis shows atmospheric compares CNRM-CM5. Biases precipitation shortwave radiation over Tropics generate errors gross primary productivity ecosystem respiration. Compared to CNRM-CM5, revised ocean–sea ice coupling has modified sea-ice cover ocean ventilation, unrealistically strengthening flow North Atlantic deep water (26.1 ± 2 Sv). It results an accumulation anthropogenic ocean.