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World Data Centre for Aerosols
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Home    May 31, 2016
News & Events
DUST 2016
2nd International Conference on Atmospheric Dust
June 12-17, 2016
TARANTO, ITALY  read more ...
RECETOX Summer School
RECETOX Summer School on Toxic Compounds in the Environment
13 - 17 June, 2016, Brno, Czech Republic.  read more ...
EAC 2016
22nd European Aerosol Conference EAC 2016, 4-9 September 2016, Tours, France.  read more ...
15th AEROCOM Workshop
15th AEROCOM Workshop
19 - 23 September 2016
in Beijing, China,
Combined with AeroSat and CTWF Symposium hosted by Chinese Academy of Science, Institute of Atmospheric Physics  read more ...
EMEP/GAW aerosol Data Submission WS
EMEP/GAW aerosol Data Submission Workshop
on data format, quality assurance and data submission
October 2016, Kjeller, Norway  
AAAR 35th Annual Conference
AAAR 35th Annual Conference
October 17-21, 2016
Oregon Convention Center
Portland, OR  read more ...
AGU Fall Meeting 2016
AGU Fall Meeting 2016
12-16 December 2016, San Francisco  read more ...
EGU General Assembly 2017
General Assembly of the European Geosciences Union,
23 - 28 April 2017, Vienna  read more ...
EAC 2017
European Aerosol Conference EAC 2017, August 27 - September 1, 2017, Zürich, Switzerland  
AAAR 36th Annual Conference
October 16-20, 2017
Raleigh Convention Center
Raleigh, NC  
EGU General Assembly 2018
General Assembly of the European Geosciences Union, 08–13 April 2018, Vienna, Austria  read more ...
IAC 2018
10th International Aerosol Conference
September 2-7, 2018
America's Center
St. Louis, MO, USA  read more ...
 
The World Data Centre for Aerosols (WDCA)
is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme. 

"The goal of the Global Atmosphere Watch (GAW) programme is to ensure long-term measurements in order to detect trends in global distributions of chemical constituents in air and the reasons for them. With respect to aerosols, the objective of GAW is to determine the spatio-temporal distribution of aerosol properties related to climate forcing and air quality on multi-decadal time scales and on regional, hemispheric and global spatial scales."

GAW aerosol long-term observation core parameters:
  • Physical Properties:
    • particle number concentration (size integrated)
    • particle number size distribution
    • particle mass concentration (two size fractions)
    • cloud condensation nuclei number concentration (at various super-saturations)
  • Optical Properties:
    • light scattering coefficient (various wavelengths)
    • light hemispheric backscattering coefficient (various wavelengths)
    • light absorption coefficient (various wavelengths)
  • Chemical Properties:
    • mass concentration of major chemical components (two size fractions)
  • Column and Profile:
    • aerosol optical depth (various wavelengths)
    • vertical profile of aerosol backscattering coefficient
    • vertical profile of aerosol extinction coefficient

Additional parameters recommended for long-term or intermittent observation:
  • dependence of aerosol properties on relative humidity
  • detailed, size segregated chemical composition.

The extent of the observation programme varies between observatories networked in GAW. The observations are reported by the GAW observatories on a voluntary basis, while the station infrastructure is a contribution of the participating national authorities to the GAW programme.
GAW Links
 
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