Dust

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AeroCom working group DUST

Participants for analysis

Ginoux, Balkanski, Mahowald, Schulz, Miller, Tegen, Zender, Winker, Mann, Takemura, (Textor)

- NEXT Telephone conference: 10th of January 17 UTC (= 18 Paris time, 12 ET, 10 Boulder Time?)
telephone number available from Michael Schulz
Participants foreseen:

Zender has prior commitments on Jan 10 from 1700-2100 UTC. I will continue to monitor developments on the Wiki, and I reaffirm my support and commitment for an extensible C&M tool--Charlie

Goals

Investigate the possible impact of anthropogenic dust sources
Compare dust simulations to multiple observational datasets
Recommend properties for dust size and refractive index

Processes and possible Diagnostics

Dust erosion - wind frequency and speed ; threshold velocities; effective source fluxes; source size distribution

Dust settling - dry removal velocities per size bin;

Wet Dust removal - wet scavenging efficients; vertical distribution; wet deposition of Calcium, dust;

Scattering and absorption - refractive index; AOD; size; absorption

Short-term actions/experiments

Organise regular teleconferences

Prepare a natural and an anthropogenic dust source for a joint experiment
Follow up on ideas from earlier Mahowald publications.

Assemble observations
(Visibility, IDDI, MISR, MODIS, MODIS Deepblue, Deposition, Aeronet, Aeroce, Calipso, Asian dust observations, Ca concentrations in rain)
Retrieve from AeroCom database dust variables and wind speed fields

Eventually participate in dust conference in Italy

Data to look at

The AeroCom database has unanalysed data on dust deposition and wind speed statistics in some models.

Aeronet dust dominated sites

Refractive index and size in literature

Dust, Fe and Ca concentrations in air and precipitation

Satellite AOD in dust dominated regions (MISR, MODIS, TOMS, DEEPBLUE-MODIS, CALIPSO)

Fine mode AOD in dust regions?

Figure taken from Textor et al., ACP 2006