Table of Contents

Introduction

The aerosol climatology was derived from the CAMS interim Reanalysis and its control run (Flemming et al. 2017) as described in Bozzo et al. (2019). The data set is based on the modelled aerosol mixing ratios of the control run, which were scaled to match the Aerosol Optical Depth (AOD) analyses of the CAMS interim Reanalysis (Data assimilation of MODIS AOD). It contains monthly mean 3D mass mixing ratios of desert dust (3 size bins), seas salt (3 size bins), organic matter, black carbon and sulphate as represented by the IFS-AER aerosol scheme (Remy et al. 2019) .

Data description

The purpose of the dataset is to represent aerosols in the radiation scheme of the Integrated Forecasting System of ECMWF.

The file aerosol_cams_3d_climatology_2003-2013.nc contains the CAMS aerosol climatology as originally described in Bozzo et al. (2019)

The file aerosol_cams_3d_climatology_47r1.nc contains the CAMS aerosol climatology as used in IFS cycle 47r1. The dataset has manually reduced organic matter and black carbon mass mixing ratios over Central Africa. The original dataset had led to a degradation of the temperature forecasts in that area.

The file aerosol_cams_ifs_optics.nc provides the optical parameters needed for the implementation of the radiative effect of the CAMS aerosol species in the ECMWF radiation scheme. The file also provides the optical properties for a set of 20 individual wavelengths covering the visible and near-infrared spectral range.

All files can be found here:  https://sites.ecmwf.int/data/cams/aerosol_radiation_climatology/

Dataset DOI: https://doi.org/10.24380/jgs8-sc58


ParametersUnits
Black Carbon hydrophilickg m-2
Black Carbon hydrophobickg m-2
Half level delta pressurePa
Air pressurePa
Mineral dust bin 11 layer-integrated masskg m-2
Mineral dust bin 2 2 layer-integrated masskg m-2
Mineral dust bin 33 layer-integrated masskg m-2
Hydrophilic mineral dust layer-integrated masskg m-2
Hydrophobic mineral dust layer-integrated masskg m-2
Sea salt bin 1 layer-integrated masskg m-2
Sea salt bin 2 layer-integrated masskg m-2
Sea salt bin 3 layer-integrated masskg m-2
Sulfates layer-integrated masskg m-2

1This bin contains particles with dry radius in the range 0.03-0.5 microns.

2This bin contains particles with dry radius in the range 0.5-5.0 microns.

3This bin contains particles with dry radius in the range 5.0-20.0 microns.

ParametersUnits
Longwave asymmetry factor of hydrophilic aerosols0-1
Longwave asymmetry factor of hydrophobic aerosols0-1
Asymmetry factor of hydrophilic aerosols at selected wavelengths0-1
Asymmetry factor of hydrophobic aerosols at selected wavelengths0-1
Shortwave asymmetry factor of hydrophilic aerosols0-1
Shortwave asymmetry factor of hydrophobic aerosols0-1
Lidar ratio of hydrophilic aerosols at selected wavelengthssr
Lidar ratio of hydrophobic aerosols at selected wavelengthssr
Longwave mass-extinction coefficient of hydrophilic aerosolsm2 kg-1
Longwave mass-extinction coefficient of hydrophobic aerosolsm2 kg-1
mass-extinction coefficient of hydrophilic aerosols at selected wavelengthsm2 kg-1
mass-extinction coefficient of hydrophobic aerosols at selected wavelengthsm2 kg-1
Shortwave mass-extinction coefficient of hydrophilic aerosolsm2 kg-1
Shortwave mass-extinction coefficient of hydrophobic aerosolsm2 kg-1
Lower bounds of relative humidity bins%
Upper bounds of relative humidity bins%
Longwave single scattering albedo of hydrophilic aerosols0-1
Longwave single scattering albedo of hydrophobic aerosols0-1
single scattering albedo of hydrophilic aerosols at selected wavelengths0-1
single scattering albedo of hydrophobic aerosols at selected wavelengths0-1
Shortwave single scattering albedo of hydrophilic aerosols0-1
Shortwave single scattering albedo of hydrophobic aerosols0-1
Copy of CAMSiRA: the CAMS interim ReanalysisWavelength of monochromatic datam
Lower bound wavenumber for longwave bandcm-1
Lower bound wavenumber for shortwave bandcm-1
Upper bound wavenumber for longwave bandcm-1
Upper bound wavenumber for shortwave bandcm-1

References

Bozzo, A., Benedetti, A., Flemming, J., Kipling, Z., and Rémy, S.: An aerosol climatology for global models based on the tropospheric aerosol scheme in the Integrated Forecasting System of ECMWF, Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2019-149, in review, 2019.

Flemming, J., Benedetti, A., Inness, A., Engelen, R. J., Jones, L., Huijnen, V., Remy, S., Parrington, M., Suttie, M., Bozzo, A., Peuch, V.-H., Akritidis, D., and Katragkou, E.: The CAMS interim Reanalysis of Carbon Monoxide, Ozone and Aerosol for 2003-2015, Atmos. Chem. Phys., 17, 1945-1983, doi:10.5194/acp-17-1945-2017, 2017.

Rémy, S., Kipling, Z., Flemming, J., Boucher, O., Nabat, P., Michou, M., Bozzo, A., Ades, M., Huijnen, V., Benedetti, A., Engelen, R., Peuch, V.-H., and Morcrette, J.-J.: Description and evaluation of the tropospheric aerosol scheme in the European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecasting System (IFS-AER, cycle 45R1), Geosci. Model Dev., 12, 4627–4659, https://doi.org/10.5194/gmd-12-4627-2019, 2019.

This document has been produced in the context of the Copernicus Atmosphere Monitoring Service (CAMS).

The activities leading to these results have been contracted by the European Centre for Medium-Range Weather Forecasts, operator of CAMS on behalf of the European Union (Delegation Agreement signed on 11/11/2014 and Contribution Agreement signed on 22/07/2021). All information in this document is provided "as is" and no guarantee or warranty is given that the information is fit for any particular purpose.

The users thereof use the information at their sole risk and liability. For the avoidance of all doubt , the European Commission and the European Centre for Medium - Range Weather Forecasts have no liability in respect of this document, which is merely representing the author's view.

1 Comment

  1. The sea salt mass and size is provided at a relative humidity of 80%. The mass of the corresponding dry sea salt is 1/4.3 smaller and the radius 1/2 of the sea salt at RH80%.