CADEX Measuring Instruments

Multiwavelength Raman Polarization Lidar PollyXT

TROPOS contributes with a PollyXT system to the measurement campaign. PollyXT is a portable, multiwavelength depolarization Raman lidar developed at TROPOS (Althausen et al., 2009). It has been formerly deployed to places almost all over the world (e.g. Baars, 2012; Kanitz, 2013). 

Sun Photometer

The Physical-Technical Institute of the Academy of Sciences of Tajikistan contributes a Cimel sun photometer 318N-EBM9 (Cimel Electronique, France), a CIMEL Pyranometer CE-180, Pyrheliometer CH 1, and meteorological data.

The sun photometer is related to the monitoring of the aerosol optical properties program AERONET that operates worldwide under the supervision of NASA/GSFC and Laboratoire d'Optique Atmosphérique.

Meteorological data

The meteorological data from Dushanbe are available online:  and

Particle Counter

The GFZ German Research Centre for Geosciences Potsdam contributes a laser particle counter (GRIMM 180 ENVIRON) to measure particle number size distribution on the ground level at the field site in Dushanbe/Tajikistan. GFZ Potsdam is experienced in investigating Central Asian dust’s chemical and mineralogical composition in Kyrgyzstan (Schettler et al., 2014). This collaboration helps, together with the chemical analysis of the particles, to characterize the dust over Tajikistan and finally to determine the absorption properties of Central Asian dust.

Chemical Measurements

The DHA-80 is a high volume particle sampler for PM10 particulates. Additionally to the mass concentration of particulate matter, organic and elemental carbon, ionic components and soluble metals will be analyzed using quartz fiber filters.

The sampling intervals can vary between 6 and 72 hours depending on the dust amount.