- 1NOAA/OAR-GFDL, Atmospheric Physics, Chemistry, and Climate, Princeton, United States of America (paul.ginoux@noaa.gov)
- 2NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
- 3Department of Project and Construction Engineering, Technical University of Catalonia, Terrassa, Spain
- 4University of California Los Angeles, Los Angeles, CA, USA
- 5Barcelona Supercomputing Center, Barcelona, Spain
- 6ICREA, Catalan Institution for Research and Advances Studies, Barcelona, Spain
With more than 20 years of MODIS twice daily global measurements, dust hot spots have been
located using the extrema of frequency of occurrence of Dust Optical Depth (DOD) derived from
MODIS Deep Blue aerosol products. We know that these hot spots have a geomorphological signature (cf. Prospero et al., 2002; Baddock et al., 2016) but does it also imply that they have a mineralogical signature? This is important to know as mineralogy controls the sign and amplitude of dust interactions with the Earth's climate systems, in particular in terms of radiative forcing, ice cloud formation, rain water acidity, snow albedo, ocean bio-geochemistry. By overlaying over the dust hot spots, the soil mineralogy retrieved from the hyperspectral instrument NASA-JPL Earth Surface Mineral Dust Source Investigation (EMIT) over almost 3 years, our presentation will show that mineralogical content of dust hot spots is region specific.
How to cite: Ginoux, P., Brodrick, P. G., Gonçalves Ageitos, M., Okin, G. S., Pérez Garcia-Pando, C., Thompson, D. R., and Green, R. O.: Can we infer a mineralogical signature of dust hot spots using EMIT hyperspectral data?, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-2589, https://doi.org/10.5194/egusphere-egu25-2589, 2025.
