SURFEX v8.0 interface with OASIS3-MCT to couple atmosphere with hydrology, ocean, waves and sea-ice models, from coastal to global scales

Voldoire, Aurore; Decharme, Bertrand; Pianezze, Joris; Brossier, Cindy Lebeaupin; Sevault, Florence; Seyfried, Léo; Garnier, Valérie; Bielli, Soline; Valcke, Sophie; Alias, Antoinette; Accensi, Mickaël; Ardhuin, Fabrice; Bouin, Marie‐Noëlle; Ducrocq, Véronique; Faroux, Stéphanie; Giordani, Hervé; Léger, Fabien; Marsaleix, Patrick; Rainaud, Romain; Redelsperger, Jean‐Luc; Richard, Évelyne; Riette, Sébastien

doi:10.5194/gmd-10-4207-2017

Cited by 65 publications

(72 citation statements)

References 77 publications

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“…Accordingly, it has been recoded in Fortran 90 using the netcdf I/O format (https://www.unidata.ucar.edu/software/netcdf/), and the previous global river channel network at 1° resolution has been increased to 0.5° resolution and enhanced over Europe. SURFEX now includes a coupling interface (Voldoire et al, ) based on the OASIS3‐MCT coupler (Valcke et al, ). All exchanges between ISBA DF and CTRIP now run through this interface: all runoff fluxes, the surface water budget (precipitation interception minus infiltration and evaporation) of floodplains computed by ISBA DF and the depth of the water table, the fraction of the grid cell allowing upward capillary fluxes from the water table, the flooded fraction of the grid cell, and the potential mass of flood water that could infiltrate the soil computed by CTRIP.…”

Section: Review Of Land Surface Systemsmentioning

confidence: 99%

Recent Changes in the ISBA‐CTRIP Land Surface System for Use in the CNRM‐CM6 Climate Model and in Global Off‐Line Hydrological Applications

Decharme

Delire

Marie

et al. 2019

J Adv Model Earth Syst

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In recent years, significant efforts have been made to upgrade physical processes in the ISBA‐CTRIP land surface system for use in fully coupled climate studies using the new CNRM‐CM6 climate model or in stand‐alone mode for global hydrological applications. Here we provide a thorough description of the new and improved processes implemented between the CMIP5 and CMIP6 versions of the model and evaluate the hydrology and thermal behavior of the model at the global scale. The soil scheme explicitly solves the one‐dimensional Fourier and Darcy laws throughout the soil, accounting for the dependency of hydraulic and thermal soil properties on soil organic carbon content. The snowpack is represented using a multilayer detailed internal‐process snow scheme. A two‐way dynamic flood scheme is added in which floodplains interact with the soil hydrology through reinfiltration of floodwater and with the overlying atmosphere through surface free‐water evaporation. Finally, groundwater processes are represented via a two‐dimensional diffusive unconfined aquifer scheme allowing upward capillarity rises into the superficial soil. This new system has been evaluated in off‐line mode using two different atmospheric forcings and against a large set of satellite estimates and in situ observations. While this study is not without weaknesses, its results show a real advance in modeling the physical aspects of the land surface with the new ISBA‐CTRIP version compared to the previous system. This increases our confidence that the model is able to represent the land surface physical processes accurately across the globe and in turn contribute to several important scientific and societal issues.

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Section: Review Of Land Surface Systemsmentioning

confidence: 99%

Recent Changes in the ISBA‐CTRIP Land Surface System for Use in the CNRM‐CM6 Climate Model and in Global Off‐Line Hydrological Applications

Decharme

Delire

Marie

et al. 2019

J Adv Model Earth Syst

Self Cite

188

232

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“…These models were chosen because they can represent the fundamental processes involved in TC, from regional to coastal ones, and for deep to shallow waters. This coupling system is based on the multimodel coupling platform described in Voldoire et al (), which has been extended to the use of the CROCO model. The main features and the configuration of each model are described in this section, along with the coupling strategy.…”

Section: Presentation Of the Modeling Systemmentioning

confidence: 99%

A New Coupled Ocean‐Waves‐Atmosphere Model Designed for Tropical Storm Studies: Example of Tropical Cyclone Bejisa (2013–2014) in the South‐West Indian Ocean

Pianezze

Barthe

Bielli

et al. 2018

J Adv Model Earth Syst

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Ocean‐Waves‐Atmosphere (OWA) exchanges are not well represented in current Numerical Weather Prediction (NWP) systems, which can lead to large uncertainties in tropical cyclone track and intensity forecasts. In order to explore and better understand the impact of OWA interactions on tropical cyclone modeling, a fully coupled OWA system based on the atmospheric model Meso‐NH, the oceanic model CROCO, and the wave model WW3 and called MSWC was designed and applied to the case of tropical cyclone Bejisa (2013–2014). The fully coupled OWA simulation shows good agreement with the literature and available observations. In particular, simulated significant wave height is within 30 cm of measurements made with buoys and altimeters. Short‐term (< 2 days) sensitivity experiments used to highlight the effect of oceanic waves coupling show limited impact on the track, the intensity evolution, and the turbulent surface fluxes of the tropical cyclone. However, it is also shown that using a fully coupled OWA system is essential to obtain consistent sea salt emissions. Spatial and temporal coherence of the sea state with the 10 m wind speed are necessary to produce sea salt aerosol emissions in the right place (in the eyewall of the tropical cyclone) and with the right size distribution, which is critical for cloud microphysics.

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“…This generic coupling strategy based upon an externalized surface model ensures that the surface flux computations are done in a consistent way, independently of the models to be coupled. As illustrated in Voldoire et al (2017), this strategy has greatly facilitated the coupling of the different models developed in the French community, including the coupling of the MESONH atmospheric model (Lafore et al, 1997) and the SYMPHONIE ocean model .…”

Section: Introductionmentioning

confidence: 99%

“…These issues, among others, have motivated the recent development of a new coupling platform (SURFEX OASIS3-MCT) providing better numerical tools to address the scientific and technical questions related to ocean-waveatmosphere coupling (Voldoire et al, 2017). This coupling platform is based on the multi-surface model SURFEX (Masson et al, 2013) and on the OASIS3-MCT (Craig et al, 2017) code coupler.…”

Section: Introductionmentioning

confidence: 99%

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Modelling deep-water formation in the north-west Mediterranean Sea with a new air–sea coupled model: sensitivity to turbulent flux parameterizations

et al. 2017

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Abstract. In the north-western Mediterranean, the strong, dry, cold winds, the Tramontane and Mistral, produce intense heat and moisture exchange at the interface between the ocean and the atmosphere leading to the formation of deep dense waters, a process that occurs only in certain regions of the world. The purpose of this study is to demonstrate the ability of a new coupled ocean-atmosphere modelling system based on MESONH-SURFEX-SYMPHONIE to simulate a deep-water formation event in real conditions. The study focuses on summer 2012 to spring 2013, a favourable period that is well documented by previous studies and for which many observations are available. Model results are assessed through detailed comparisons with different observation data sets, including measurements from buoys, moorings and floats. The good overall agreement between observations and model results shows that the new coupled system satisfactorily simulates the formation of deep dense water and can be used with confidence to study ocean-atmosphere coupling in the north-western Mediterranean. In addition, to evaluate the uncertainty associated with the representation of turbulent fluxes in strong wind conditions, several simulations were carried out based on different parameterizations of the flux bulk formulas. The results point out that the choice of turbulent flux parameterization strongly influences the simulation of the deep-water convection and can modify the volume of the newly formed deep water by a factor of 2.

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SURFEX v8.0 interface with OASIS3-MCT to couple atmosphere with hydrology, ocean, waves and sea-ice models, from coastal to global scales

Cited by 65 publications

References 77 publications

Recent Changes in the ISBA‐CTRIP Land Surface System for Use in the CNRM‐CM6 Climate Model and in Global Off‐Line Hydrological Applications

Recent Changes in the ISBA‐CTRIP Land Surface System for Use in the CNRM‐CM6 Climate Model and in Global Off‐Line Hydrological Applications

A New Coupled Ocean‐Waves‐Atmosphere Model Designed for Tropical Storm Studies: Example of Tropical Cyclone Bejisa (2013–2014) in the South‐West Indian Ocean

Modelling deep-water formation in the north-west Mediterranean Sea with a new air–sea coupled model: sensitivity to turbulent flux parameterizations

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