66 Works


Thomas Fiolleau & Rémy Roca

Martian Year 34 Climatology of the Atmospheric Column Dust Optical Depth

Luca Montabone, Ehouarn Millour, François Forget, Aymeric Spiga , David Kass & Armin Kleinböhl
We provide a climatology of airborne dust for Martian year 34 using observations of the Martian atmosphere from May 2016 to March 2018 made by the Mars Climate Sounder (MCS) aboard Mars Reconnaissance Orbiter (MRO). Our methodology works by gridding the available estimates of column dust optical depth (CDOD) from MCS limb observations. The resulting (irregularly) gridded maps were validated with independent observations of CDOD by the Mars Color Imager camera aboard MRO, and by...

ORCHIDEE-MUSLE revision 6129

Global water erosion strongly affect the terrestrial carbon (C) balance. However, this process is currently ignored by most global land surface models (LSMs) that are used to project the responses of terrestrial C storage to climate and land use changes. One of the main obstacles of implementing erosion process in LSMs is the high spatial resolution needed to accurately represent the effect of topography on soil erosion and sediment delivery to rivers. In this study,...


Aerosol and cloud-induced changes in diffuse light have important impacts on the global land carbon cycle by changing light distribution and photosynthesis in vegetation canopies. However, this effect remains poorly represented in current land surface models. Here we add a light partitioning module and a new canopy light transmission module to the ORCHIDEE land surface model (trunk version, v5453) and use the revised model, ORCHIDEE_DF, to estimate the fraction of diffuse light and its effect...

Simulations of the HDO cycle with LMD Mars GCM

We present here simulations of the HDO cycle on Mars, using the LMD Mars GCM. They show the water and HDO cycles, following the reimplementation of tracers related to HDO in the model. In these simulations, the cloud formation is done assuming a simplified scheme, without the details of the condensation nuclei. Clouds are not radiatively active. Two dust scenarios are available: one for the climatology scenario (representative of an average year on Mars), one...

The CHIMERE chemistry-transport model v2020

Laurent Menut & Laurent Menut
CHIMERE is an open source multi-scale chemistry-transport model designed to produce (i) accurate analysis of pollution episodes, (ii) daily forecasts of ozone, aerosols and other pollutants, (iii) long-term simulations (entire seasons or years) for emission control scenarios. CHIMERE runs over a range of spatial scale, from the hemispheric to the urban scale with resolutions from 1km to several degrees. CHIMERE has many different options for simulations which make it also a powerful research tool for...


, &
Dataset of orographic precipitations in the Ardeche area. Measurements will be carried out with a X-band dual polarization Doppler radar (MXPOL). The main polarimetric variables will be made available to the dataset.

ORCHIDEE-ROUTING: A new river routing scheme using a high resolution hydrological database

This study presents a revised river routing scheme (RRS) for the Organising Carbon and Hydrology in Dynamic Ecosystems (ORCHIDEE) land surface model. The revision is carried out to benefit from the high resolution topography provided the Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales (HydroSHEDS), processed to a resolution of approximately 1 kilometer. The RRS scheme of the ORCHIDEE uses a unit-to-unit routing concept which allows to preserve as much of...

ORCHIDEE_CAN revision 2290

Sebastiaan Luyssaert
Since 70% of global forests are managed and forests impact the global carbon cycle and the energy exchange with the overlying atmosphere, forest management has the potential to mitigate climate change. Yet, none of the land-surface models used in Earth system models, and therefore none of today’s predictions of future climate, accounts for the interactions between climate and forest management. We addressed this gap in modelling capability by developing and parametrising a version of the...

ORCHIDEE_CAN revision 3069

Sebastiaan Luyssaert
The Paris Agreement contains the implicit assumption that enhancing the forest sector carbon sink through sustainable forest management and biomass usage will result in climate benefits. Here, we use simulation experiments to search for portfolios of sustainable forest management that, by the turn of the 21st-century, comply with the Paris Agreement, i.e., reduce the growth rate of atmospheric CO2, reduce the radiative imbalance at the top of the atmosphere, and neither increase the near-surface air...

A generic pixel-to-point comparison for simulated large-scale ecosystem properties and ground-based observations: an example from the Amazon region

Comparing model output and observed data is an important step for assessing model performance and quality of simulation results. However, such comparisons are often hampered by differences in spatial scales between local point observations and large-scale simulations of grid-cells or pixels. In this study, we propose a generic approach for a pixel-to-point comparison that accounts for the uncertainty resulting from landscape variability and measurement errors in ecosystem variables, and provide statistical measures. The basic concept...

The use of radiocarbon 14C to constrain carbon dynamics in the soil module of the land surface model ORCHIDEE (SVN r5165)

Bertrand Guenet
Despite the importance of soil as a large component of the terrestrial ecosystems, the soil compartments are not well represented in the Land Surface Models (LSMs). Indeed, soils in current LSMs are generally represented based on a very simplified schema that can induce a misrepresentation of the deep dynamics of soil carbon. Here, we present a new version of the Institut Pierre Simon Laplace (IPSL) Land Surface Model called ORCHIDEE-SOM (ORganizing Carbon and Hydrology in...

Monthly 3D outputs of ocean biogeochemical tracers and ocean physical variables in the simulations piControl and RCP8.5 made with the IPSL-CM5A-LR model

Jean-Louis Dufresne, Marie-Alice Foujols, Sébastien Denvil & Damien Couespel
Monthly 3D outputs of ocean biogeochemical tracers and ocean physical variables in the simulations piControl and RCP8.5 made with the IPSL-CM5A-LR model. These outputs are used to compute oxygen subduction and estimate respiration below the mixed layer depth between 1990 and 2099. The methodology requires monthly outputs which were not part of the CMIP5 output protocol and therefore are not availble in the ESGF archive.

CCI+Sea Surface Salinity v1

Jacqueline Boutin &
Sea Surface Salinity (SSS) is an Essential Climate Variable (ECV) that plays a fundamental role in the density-driven global ocean circulation, the water cycle, and climate. The satellite SSS observation from the Soil Moisture and Ocean Salinity (SMOS), Aquarius, and Soil Moisture Active Passive (SMAP) missions have provided an unprecedented opportunity to map SSS over the global ocean since 2010 at 40-150km scale with a revisit every 2 to 3 days. This observation capability has...

APIFLAMEv2 global burned area from MODIS satellite observations 2014-2017

Solène Turquety
Global burned area estimated based on the MODIS fire observations observations (MCD64, MOD14) using the APIFLAMEv2 software. Two datasets are provided. AB_FRP_MODIS includes ascii files of burned area at 500m resolution (MODIS MCD64) and fire radiative power (FRP) at 1km resolution (MODIS MOD14). AB_FRP_MODIS_GRIDDED provides netcdf files with gridded (0.5x0.5degree) estimates of burned area, FRP maximum, FRP distribution, and potential burned area from small fires (non coincident active fires and burned scars). Full description of...

A study of daytime convective vortices and turbulence in the martian Planetary Boundary Layer based on half-a-year of InSight atmospheric measurements and Large-Eddy Simulations

Aymeric Spiga
The data archive contains all data and codes supporting the analysis in the paper A study of daytime convective vortices and turbulence in the martian Planetary Boundary Layer based on half-a-year of InSight atmospheric measurements and Large-Eddy Simulations, A. Spiga et al., Journal of Geophysical Research – Planets. This paper is also available on arxiv https://arxiv.org/abs/2005.01134. All InSight calibrated data used to produce this dataset are publicly available in the Planetary Data System. Data from...

High-Tune Explorer software

Frédéric Hourdin, Fleur Couvreux & Laurent Fairhead
High-Tune Explorer is a suite of programs developed in the frame of the High-Tune project, supported by the ANR french research agency. The version of the codes associated with this DOI corresponds to the versions used in a 2-part paper published in Journal of Advances in Modeling Earth Systems in 2020 : Process-based climate model development harnessing machine learning I) a calibration tool for parameterization improvement; II) model calibration from single column to global. The...

2018 and 2019 ACTRIS Cloud Radar Calibration Campaign, Corner Reflectors on Masts Experiment

Felipe Toledo, Julien Delanoe, & Martial Haeffelin
This dataset contains all radar measurements used in the preparation of a new cloud radar calibration methodology, using reference reflectors mounted on masts. This data was collected during two field experiments held in 2018 and 2019 at the SIRTA atmospheric observatory, located in Palaiseau, France, in the framework of the ACTRIS-2 research and innovation program. A documented python file with the time periods used in each published retrieval is included.

Micro Rain Radar LaMP Le Pradel

Van Baelen Joel

Stable isotopes of the water vapour in the Atmospheric boundary layer from five Atlantic Ocean cruises in 2012-2015

Marion Benetti & Hans Christian Steen-Larsen
The marine boundary layer atmospheric water vapour isotopic composition (oxygen 18 and deuterium) has been measured above the Atlantic Ocean from 5 research vessels between 2012 and 2015. Using laser spectroscopy analysers, measurements have been carried out semi-continuously on samples collected 10-20 meter above sea level.

Global GPS Integrated Water Vapor - IGS repro1 - v1

Olivier Bock
Global GPS IWV data at 120 stations of IGS permanent network


Marjolaine Chiriaco
SIRTA-ReOBS is a project whose goal is to synthetize, analyze, homogeneize, all SIRTA observations hourly averaged in a single NetCDF file. It has been developped in order to study regional climate variability

Downscaled Relative Humidity profiles for tropical ice clouds

Giulia Carella
This dataset provides downscaled relative humidity profiles at 90 m resolution for tropical ice clouds derived from measurement of relative humidity from SAPHIR, a passive microwave sounder with a nominal resolution of 10 km. The downscaled profiles were obtained by an iterative non-parametric regression of the coarse resolution relative humidity as a function of co-located measurements of the scattering ratio from the CALIPSO lidar.

ORCHIDEE_MICT-LEAK revision 5459

Simon Bowring
Here, the production, transport and atmospheric release of dissolved organic carbon (DOC) from high-latitude permafrost soils into inland waters and the ocean is explicitly represented for the first time in the land surface component (ORCHIDEE) of a CMIP6 global climate model (IPSL). The model presented here mechanistically represents vegetation and soil physical processes for (a) high latitude snow, ice and soil phenomena, and (b) DOC production and lateral transport and atmospheric evasion as CO2 through...

Registration Year

  • 2020
  • 2019
  • 2018
  • 2017
  • 2016

Resource Types

  • Dataset
  • Software


  • Laboratoire de Météorologie Dynamique
  • Laboratoire d’Etudes en Géophysique et Océanographie Spatiales
  • Centre national de la recherche scientifique
  • Jet Propulsion Lab
  • University of Paris-Sud
  • French National Centre for Scientific Research
  • Laboratoire des Sciences du Climat et de l'Environnement
  • Geosciences Paris Sud
  • Space Science Institute
  • École Polytechnique