Abstract
Tajikistan is often affected by atmospheric mineral dust. The direct and indirect radiative effects of dust play a sensitive role in the climate system in Central Asia. The Central Asian Dust Experiment (CADEX) provides first lidar measurements in Tajikistan. The autonomous multiwavelength polarization Raman lidar PollyXT was operated for 1.5 years (2015/16) in Dushanbe. In spring, lofted layers of long-range transported dust and in summer/ autumn, lower laying dust from local or regional sources with large optical thicknesses occurred.
Highlights
Dust influences weather and climate on earth by direct and indirect effects
Central Asia is strongly affected by climate change which is manifested in Tajikistan in a severe glacier retreat [1]
Storms aerosol optical thicknesses (AOT) of up to 3.5 were measured and a couple of vertical profiles of the dust distribution were measured by aircraft [5]
Summary
Dust influences weather and climate on earth by direct and indirect effects. Central Asia is strongly affected by climate change which is manifested in Tajikistan in a severe glacier retreat [1]. Aerosol observations in Tajikistan are extremely valuable to understand regional and global transport of mineral dust. During a Soviet-American campaign in 1989 two dust storms were observed [4]. During these dust, storms aerosol optical thicknesses (AOT) of up to 3.5 (at 550 nm) were measured and a couple of vertical profiles of the dust distribution were measured by aircraft [5]. The knowledge of the vertical aerosol distribution over Tajikistan and especially the transport of mineral dust over Central Asia is still poor. The Central Asian Dust Experiment (CADEX) was performed to obtain long-term data on vertical profiles of optical aerosol properties
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