Data overview
AeroCom Database
NEW -> An external
data server allows users to acces AeroCom model data directly.
Model data are stored and processed at the LSCE.
Condition for access to the AeroCom data server:
- A short project description of the planned analysis is send to AeroCom
contact (michael.schulz at cea.fr)
- An account is opened upon sending a request for an account
(see IT form and instructions)
- The project description is made available to AeroCom participants
see list below
- Results from analysis are reported to AeroCom workshops
- Publication-Coauthorship is offered to model and data author
Format of data is explained on the database page
and
further help is found and in Tools section.
Variable names in files correspond to
the protocol
and a combination of the species and parameter names used
in the image catalogues.
AeroCom Image Catalogues
AeroCom data usage
Observational data collected for AeroCom comparison purposes resides in the data providers data
holding facilities. Please see respective web sites for contact details
(Surface observations and Lidar data ).
For image catalogue results documented via the web interfaces
please contact the AeroCom coordination team and/or the
model participants prior to use.
Links to the individual models can be found via the participants-listing
Overview tables and documentation of the aerosol model parameterisations
can be found in the papers accessible via the AeroCom Reference section.
Please note also the acknowledgements.
Current AeroCom Model Data Base Exploration Project Descriptions
AeroCom Climatology / contact Michael Schulz
Model results assembled in the course of the AeroCom initiative are used to construct a model based aerosol climatology. This is based on ca. 20 model simulations as described earlier by Textor et al. 2006, Kinne et al. 2006 and Schulz et al. 2006. The aerosol climatology comprises on a daily basis observable quantities such as aerosol optical depth, Angstrom component, fine fraction aerosol optical depth, singe scattering albedo, aerosol radiative effect and vertical distribution of aerosol extinction and an estimate of attenuated backscatter. These are complemented by quantities which are difficult to be observed from space such as 3D mass fields of aerosol components, their surface concentrations and fluxes, aerosol size and additional parameters related to aerosol radiative forcing. The aerosol fields of the climatology are then compared systematically against Aeronet and satellite observations from MODIS, Parasol and Calipso. The representativity of the climatology is tested with respect to inclusion of different subsets of model results and for the effect of interannual variability of the aerosol fields. Some model simulations are available for other years than the standard AeroCom year 2000, which we use to establish the range within which the aerosol climatology can be expected to be representative. The quality of the multi-model ensemble result is shown and its value as a recent aerosol climatology for inclusion in climate models is discussed. Selected Earth system type models from the AeroCom ensemble also have simulated aerosol fields in a coupled mode. Differences of an interactive treatment of the aerosol within a coupled model to an approach where a climatology is used are discussed.
Absorption evaluation in AeroCom models / contact Dorothy Koch
Reevaluation of Direct Radiative forcing in AeroCom models / contact Philip Stier
Dust deposition over Florida / contact Joe Prospero
Dust source optimisation with multiple data / contact Ron Miller & Paul Ginoux
Comparison of AeroCom data to ECHAM5/MESSY/ contact Jos Lelieveld/MPI-Chemie, Mayence, D
The ECHAM5/MESSy atmospheric chemistry general circulation model includes several sub-models to simulate both aerosol and gas phase chemistry. It uses input of an aerosol dynamical/microphysical model to provide the aerosol size and particle number information of the modes/bins for which the chemistry and aerosol/gas partitioning are explicitly calculated. Furthermore, we apply a new concept to calculate the aerosol water mass and directly link the aerosol hygroscopicity to droplet growth. We use ECHAM5/MESSy to study bromine explosion events in the Arctic, halogen chemistry in the marine boundary layer, aerosol acidity and the role of aerosol chemistry in fog, haze and cloud formation. The use of AEROCOM data is requested to test the results of the ECHAM5/MESSy global aerosol calculations.
Comparison MOCAGE output - AeroCom / contact Martin MENEGOZ/David Salas/CNRM/France
The CNRM/GAME laboratory has developed a Chemical Transport Model (CTM) called MOCAGE (Modele de Chimie Atmospherique de Grande Echelle) capable to describe atmospheric gas and aerosols distributions. This model has a Gaussian grid (128*64) with 47 levels, ranging from the surface to 5 hPa. MOCAGE uses ARPEGE (Meteo-France GCM) meteorological files. We model dust, sulphate and black-carbon aerosols. For sulphur compounds and black-carbon, we use AEROCOM inventories emissions. For dust, we use dynamical emissions, depending on soil moisture, roughness and wind speed (only for Sahara, Middle-east desert and central Asia).
We use bins representation of aerosols (5 bins for each species). MOCAGE has different physical parameterisation :
Advection (Semi-Lagrangian schem)
Convection (Kain-Fritsch-Bechtold, 1990)
Aerosol sedimentation : Stock's law
Dry deposition (Seinfeld & Pandis, 1998)
Below-cloud scavenging (Seinfeld & Pandis, 1998)
" In-cloud scavenging (Langner & Rodhe, 1991)
For aerosol simulations, a simplified chemical scheme describing only sulphur cycle is used :
9 chemical reactions (gaseous and aqueous phases)
10 species :
DMS, DMSO, MSA, SO2, H2S, SO4 (diagnostic species)
Oxidants : OH, H2O2, O3, NO3 (climatology)
Purpose of the comparison work to AeroCom data
Adaptation of in-cloud scavenging rates for each aerosol (Kasper-Giebl, 2000).
Comparison with observations and other models (AEROCOM project)
Coupling with ARPEGE-CLIMAT GCM to study aerosol retroactions on climate (aerosols radiative properties study ; direct and indirect aerosol effects)
