Dust Mineral Fractions at Emission

The data files available here contain the global distribution of the mineral fractions of dust aerosols at emission for the Soil Mineral Fraction (SMF) method and the Aerosol Mineral Fraction (AMF) method, as described in Perlwitz et al. (2015a), "Predicting the mineral composition of dust aerosols — Part 1: Representing key processes". Eight mineral species in five size ranges are considered. The mineral phases are illite (Illi), kaolinite (Kaol), smectite (Smec), carbonates (Calc), quartz (Quar), feldspar (Feld), iron oxides (FeOx), and gypsum (Gyps). The size ranges are 0.1-2 µm (Clay), 2-4 µm (Silt1), 4-8 µm (Silt2), 8-16 µm (Silt3), and 16-32 µm (Silt4) particle diameter.

The method on which data in the files are based can be determined from the file name ("SMFmethod" or "AMFmethod"). The files with "4320x2160" in the name contain the mineral fractions at emission at the native resolution of 5' longitude by 5' latitude. The files with "144x90" in the name are gridded at 2.5° longitude by 2° latitude resolution and are as used for model experiments using NASA GISS ModelE2 for Perlwitz et al. (2015a, b). The lower resolution fields were derived by interpolation from the high-resolution fields.

All files are in netCDF format and have been compressed using gzip.

Acknowledgement

The data were produced by research supported by the National Science Foundation (ATM-01-24258), the Department of Energy (DE-SC0006713), the NASA Modeling, Analysis and Prediction MAP) Program, and the Spanish Ministry of Economy and Competitiveness through the POLLINDUST project (CGL2011-26259).

References

Perlwitz, J.P., C. Pérez García-Pando, and R.L. Miller, 2015a: Predicting the mineral composition of dust aerosols — Part 1: Representing key processes. Atmos. Chem. Phys., 15, 11593-11627, doi:10.5194/acp-15-11593-2015.

Perlwitz, J.P., C. Pérez García-Pando, and R.L. Miller, 2015b: Predicting the mineral composition of dust aerosols — Part 2: Model evaluation and identification of key processes with observations. Atmos. Chem. Phys., 15, 11629-11652, doi:10.5194/acp-15-11629-2015.

Contact

Please address inquiries about these datasets to Dr. Jan Perlwitz.