Difference between revisions of "Dust"

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===Goals===
 
===Goals===
  
Investigate the possible impact of anthropogenic dust sources<br>
+
Investigate the possible climate impact of anthropogenic dust sources<br>
 
Compare dust simulations to multiple observational datasets<br>
 
Compare dust simulations to multiple observational datasets<br>
 
Recommend properties for dust size and refractive index<br>
 
Recommend properties for dust size and refractive index<br>
Line 22: Line 22:
 
===Short term actions===
 
===Short term actions===
  
Provide specifications for a land use related dust source
+
- Provide specifications for a land use related dust source
 
to be implemented by participating modellers (Mahowald)<br>
 
to be implemented by participating modellers (Mahowald)<br>
Pull out of dust variables for one AeroCom model (Schulz)<br>
+
- Pull out of dust variables for one AeroCom model (Schulz)<br>
passed on to R. Miller for initial testing of Cakmur analysis
+
- passed on to R. Miller for initial testing of Cakmur analysis
 +
- establish an observational database beyond Cakmur et al and AeroCom
 +
- eventually come together at AGU Acapulco conference in May 2007
  
===Processes and possible Diagnostics===
 
  
Dust erosion - wind frequency and speed ; threshold velocities;
+
===Observational data list===
effective source fluxes; source size distribution
 
  
Dust settling - dry removal velocities per size bin;
+
Al in ocean water
  
Wet Dust removal - wet scavenging efficients; vertical distribution;
+
Visibility
wet deposition of Calcium, dust;
 
  
Scattering and absorption - refractive index; AOD; size; absorption
+
IDDI index
  
===Short-term actions/experiments===
+
Satellite AOD in dust dominated regions
 +
(MISR, MODIS, TOMS, DEEPBLUE-MODIS, CALIPSO, Aeronet, Calipso)
  
Organise regular teleconferences<br>
+
Coarse mode satellite derived AOD in dust regions?
  
Prepare a natural and an anthropogenic dust source for a joint
+
Deposition
experiment<br>Follow up on ideas from earlier Mahowald publications.
+
DIRTMAP, Fe, Ca in rain
  
Assemble observations<br>
+
Surface concentrations
(Visibility, IDDI, MISR, MODIS, MODIS Deepblue, Deposition, Aeronet,
+
Aeroce, Asian network
Aeroce, Calipso, Asian dust observations, Ca concentrations in rain)<br>
 
Retrieve from AeroCom database dust variables and wind speed fields<br>
 
  
Eventually participate in dust conference in Italy <br>
+
Refractive index and size in literature
  
===Data to look at===
 
  
The AeroCom database has unanalysed data on dust deposition
+
===Processes and possible Diagnostics===
and wind speed statistics in some models.
 
  
Aeronet dust dominated sites
+
Dust erosion - wind frequency and speed ; threshold velocities;
 +
effective source fluxes; source size distribution
  
Refractive index and size in literature
+
Dust settling - dry removal velocities per size bin;
  
Dust, Fe and Ca concentrations in air and precipitation
+
Wet Dust removal - wet scavenging efficients; vertical distribution;
 +
wet deposition of Calcium, dust;
  
Satellite AOD in dust dominated regions
+
Scattering and absorption - refractive index; AOD; size; absorption
(MISR, MODIS, TOMS, DEEPBLUE-MODIS, CALIPSO)
 
  
Fine mode AOD in dust regions?
 
  
 
[[Image:Sink DUST an2000 mALLYEAR WORLD Fraction.ps.png|Sink repartitioning among AeroCom models]]
 
[[Image:Sink DUST an2000 mALLYEAR WORLD Fraction.ps.png|Sink repartitioning among AeroCom models]]
 
Figure taken from [http://www.copernicus.org/EGU/acp/acp/6/1777/acp-6-1777.pdf Textor et al., ACP 2006]
 
Figure taken from [http://www.copernicus.org/EGU/acp/acp/6/1777/acp-6-1777.pdf Textor et al., ACP 2006]

Revision as of 08:38, January 17, 2007

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AeroCom working group DUST

Participants

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

- NEXT Telephone conference: probably march 07, organised from NCAR

Goals

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

Short term actions

- Provide specifications for a land use related dust source to be implemented by participating modellers (Mahowald)
- Pull out of dust variables for one AeroCom model (Schulz)
- passed on to R. Miller for initial testing of Cakmur analysis - establish an observational database beyond Cakmur et al and AeroCom - eventually come together at AGU Acapulco conference in May 2007


Observational data list

Al in ocean water

Visibility

IDDI index

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

Coarse mode satellite derived AOD in dust regions?

Deposition DIRTMAP, Fe, Ca in rain

Surface concentrations Aeroce, Asian network

Refractive index and size in literature


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


Sink repartitioning among AeroCom models Figure taken from Textor et al., ACP 2006