Difference between revisions of "Dust"

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'''[[AeroCom]]''' wiki discussion  entry
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Go back to '''[[AeroCom]]''' wiki discussion  entry / '''[[AeroCom/Working group structure]]'''
  
Go back to '''[[AeroCom/Working group structure]]'''
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Enter the '''[[Talk:Dust|Discussion on dust]]''' or click on the flag 'discussion' above.
  
See also summary of '''[[AeroCom/Recommendations]]'''
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----
 
 
 
 
==AeroCom working group '''DUST''' ==
 
  
===Participants for analysis===
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'''AeroCom working group DUST'''
Ginoux, Balkanski, Mahowald, Schulz,
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Winker, Mann, Takemura, Miller?, Tegen?, Zender?,
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===Participants===
 +
Ginoux, Balkanski, Mahowald, Schulz, Miller, Tegen, Zender,  
 +
Winker, Mann, Takemura, (Textor)
  
NEXT Telephone conference:
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-
10th of January 17 UTC (= 18 Paris time, 12 ET, 10 Boulder Time?)
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NEXT Telephone conference: probably march 07, organised from NCAR
  
 
===Goals===
 
===Goals===
  
Investigate the possible impact of anthropogenic dust sources<br>
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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>
  
===Processes and possible Diagnostics===
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===Short term actions===
  
Dust erosion - wind frequency and speed ; threshold velocities;
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- Provide specifications for a land use related dust source
effective source fluxes; source size distribution
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to be implemented by participating modellers (Mahowald)<br>
 +
- Pull out of dust variables for one AeroCom model (Schulz)<br>
 +
- passed on to R. Miller for initial testing of Cakmur analysis<br>
 +
- establish an observational database beyond Cakmur et al and AeroCom<br>
 +
- revisit HTAP dust experiment design (see MS email to AeroCom in Dec)<br>
 +
- eventually come together at AGU Acapulco conference in May 2007<br>
 +
- suggest input for C. Zender for Perrugia conference
 +
===List of Observational data to be included in analysis===
  
Dust settling - dry removal velocities per size bin;
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Al in ocean water
  
Wet Dust removal - wet scavenging efficients; vertical distribution;
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Visibility
wet deposition of Calcium, dust;
 
  
Scattering and absorption - refractive index; AOD; size; absorption
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IDDI index
  
===Short-term actions/experiments===
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Satellite AOD in dust dominated regions
 +
(MISR, MODIS, TOMS, DEEPBLUE-MODIS, CALIPSO, Aeronet, Calipso)
  
Organise regular teleconferences<br>
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Coarse mode satellite derived AOD in dust regions?
  
Prepare a natural and an anthropogenic dust source for a joint
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Deposition
experiment<br>Follow up on ideas from earlier Mahowald publications.
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DIRTMAP, Fe, Ca in rain
  
Assemble observations<br>
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Surface concentrations
(Visibility, IDDI, MISR, MODIS, MODIS Deepblue, Deposition, Aeronet,
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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>
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Refractive index and size in literature
  
===Data to look at===
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===Processes and possible Diagnostics===
  
The AeroCom database has unanalysed data on dust deposition
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Dust erosion - wind frequency and speed ; threshold velocities;
and wind speed statistics in some models.
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effective source fluxes; source size distribution
  
Aeronet dust dominated sites
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Dust settling - dry removal velocities per size bin;
  
Refractive index and size in literature
+
Wet Dust removal - wet scavenging efficients; vertical distribution;
 +
wet deposition of Calcium, dust;
  
Dust, Fe and Ca concentrations in air and precipitation
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Scattering and absorption - refractive index; AOD; size; absorption
 
 
Satellite AOD in dust dominated regions
 
(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]]
 
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Figure taken from [http://www.copernicus.org/EGU/acp/acp/6/1777/acp-6-1777.pdf Textor et al., ACP 2006]
== Enter the DISCUSSION '''HERE''' ==
 
 
 
----
 
Thursday December 14h  --- Michael Schulz ---
 
 
 
Dear dust colleagues,
 
 
 
Having met Nathalie and Paul in Paris during the GEIA conference I am motivated again for suggesting joint dust work.
 
I think there is a good chance to get a better 'dust analysis'
 
going on the basis of the AeroCom data. But we probably need to do/propose some additional experiments.
 
 
 
During the AeroCom workshop we have said that a working group should be installed and Paul kindly agreed to lead it (for now). As suggested by the meeting we intend to maintain wiki pages for joint discussion and I have set up one with basic initial thoughts:
 
 
 
http://wiki.esipfed.org/index.php/Dust
 
 
 
However - Nathalie and me thought that some few telephone conferences would be really  helpful to get things going. I have no real experience but can only propose skype. Any better suggestion would be perfect!! I just tested: we could also download images on the wiki page prior/during a telecon.
 
Not so complicated. I suggest you use the wiki page to enter propositions for a first teleconference.
 
 
 
Right now I am not sure we will manage to start before Christmas. But some reaction to this proposal would be nice,
 
 
 
have nice winter days!
 
Michael
 

Latest revision as of 05:35, August 12, 2012

Go back to AeroCom wiki discussion entry / AeroCom/Working group structure

Enter the Discussion on dust or click on the flag 'discussion' above.


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
- revisit HTAP dust experiment design (see MS email to AeroCom in Dec)
- eventually come together at AGU Acapulco conference in May 2007
- suggest input for C. Zender for Perrugia conference

List of Observational data to be included in analysis

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