Long-term profiling of aerosol light extinction, particle mass, cloud condensation nuclei, and ice-nucleating particle concentration over Dushanbe, Tajikistan, in Central Asia
For the first time, continuous, vertically resolved long-term aerosol measurements were conducted with a state-of-the-art multiwavelength lidar over a Central Asian site. Such observations are urgently required in efforts to predict future climate and environmental conditions and to support spacebor...
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ftleibnizopen:oai:oai.leibnizopen.de:Ae011IYBdbrxVwz6zBEy 2023-05-15T13:06:03+02:00 Long-term profiling of aerosol light extinction, particle mass, cloud condensation nuclei, and ice-nucleating particle concentration over Dushanbe, Tajikistan, in Central Asia Hofer, Julian Ansmann, Albert Althausen, Dietrich Engelmann, Ronny Baars, Holger Abdullaev, Sabur F. Makhmudov, Abduvosit N. 2020 application/pdf https://oa.tib.eu/renate/handle/123456789/6227 https://doi.org/10.34657/5274 eng eng Katlenburg-Lindau : EGU CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0/ Atmospheric Chemistry and Physics 20 (2020), Nr. 8 long-term aerosol measurement multiwavelength lidar Central Asian Dust Experiment (CADEX) Tadschikistan AERONET (AErosol RObotic NETwork) 550 article Text 2020 ftleibnizopen https://doi.org/10.34657/5274 2023-03-13T00:26:29Z For the first time, continuous, vertically resolved long-term aerosol measurements were conducted with a state-of-the-art multiwavelength lidar over a Central Asian site. Such observations are urgently required in efforts to predict future climate and environmental conditions and to support spaceborne remote sensing (ground truth activities). The lidar observations were performed in the framework of the Central Asian Dust Experiment (CADEX) at Dushanbe, Tajikistan, from March 2015 to August 2016. An AERONET (AErosol RObotic NETwork) sun photometer was operated at the lidar field site. During the 18-month campaign, mixtures of continental aerosol pollution and mineral dust were frequently detected from ground to cirrus height level. Regional sources of dust and pollution as well as long-range transport of mineral dust mainly from Middle Eastern and the Saharan deserts determine the aerosol conditions over Tajikistan. In this study, we summarize our findings and present seasonally resolved statistics regarding aerosol layering (main aerosol layer depth, lofted layer occurrence); optical properties (aerosol and dust optical thicknesses at 500–532 nm, vertically resolved light-extinction coefficient at 532 nm); profiles of dust and non-dust mass concentrations and dust fraction; and profiles of particle parameters relevant for liquid water, mixed-phase cloud, and cirrus formation such as cloud condensation nuclei (CCN) and ice-nucleating particle (INP) concentrations. The main aerosol layer over Dushanbe typically reaches 4–5 km height in spring to autumn. Frequently lofted dust-containing aerosol layers were observed at heights from 5 to 10 km, indicating a sensitive potential of dust to influence cloud ice formation. Typical dust mass fractions were of the order of 60 %–80 %. A considerable fraction is thus anthropogenic pollution and biomass burning smoke. The highest aerosol pollution levels (in the relatively shallow winter boundary layer) occur during the winter months. The seasonal mean 500 nm AOT (aerosol ... Article in Journal/Newspaper Aerosol Robotic Network LeibnizOpen (The Leibniz Association) |
institution |
Open Polar |
collection |
LeibnizOpen (The Leibniz Association) |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
long-term aerosol measurement multiwavelength lidar Central Asian Dust Experiment (CADEX) Tadschikistan AERONET (AErosol RObotic NETwork) 550 |
spellingShingle |
long-term aerosol measurement multiwavelength lidar Central Asian Dust Experiment (CADEX) Tadschikistan AERONET (AErosol RObotic NETwork) 550 Hofer, Julian Ansmann, Albert Althausen, Dietrich Engelmann, Ronny Baars, Holger Abdullaev, Sabur F. Makhmudov, Abduvosit N. Long-term profiling of aerosol light extinction, particle mass, cloud condensation nuclei, and ice-nucleating particle concentration over Dushanbe, Tajikistan, in Central Asia |
topic_facet |
long-term aerosol measurement multiwavelength lidar Central Asian Dust Experiment (CADEX) Tadschikistan AERONET (AErosol RObotic NETwork) 550 |
description |
For the first time, continuous, vertically resolved long-term aerosol measurements were conducted with a state-of-the-art multiwavelength lidar over a Central Asian site. Such observations are urgently required in efforts to predict future climate and environmental conditions and to support spaceborne remote sensing (ground truth activities). The lidar observations were performed in the framework of the Central Asian Dust Experiment (CADEX) at Dushanbe, Tajikistan, from March 2015 to August 2016. An AERONET (AErosol RObotic NETwork) sun photometer was operated at the lidar field site. During the 18-month campaign, mixtures of continental aerosol pollution and mineral dust were frequently detected from ground to cirrus height level. Regional sources of dust and pollution as well as long-range transport of mineral dust mainly from Middle Eastern and the Saharan deserts determine the aerosol conditions over Tajikistan. In this study, we summarize our findings and present seasonally resolved statistics regarding aerosol layering (main aerosol layer depth, lofted layer occurrence); optical properties (aerosol and dust optical thicknesses at 500–532 nm, vertically resolved light-extinction coefficient at 532 nm); profiles of dust and non-dust mass concentrations and dust fraction; and profiles of particle parameters relevant for liquid water, mixed-phase cloud, and cirrus formation such as cloud condensation nuclei (CCN) and ice-nucleating particle (INP) concentrations. The main aerosol layer over Dushanbe typically reaches 4–5 km height in spring to autumn. Frequently lofted dust-containing aerosol layers were observed at heights from 5 to 10 km, indicating a sensitive potential of dust to influence cloud ice formation. Typical dust mass fractions were of the order of 60 %–80 %. A considerable fraction is thus anthropogenic pollution and biomass burning smoke. The highest aerosol pollution levels (in the relatively shallow winter boundary layer) occur during the winter months. The seasonal mean 500 nm AOT (aerosol ... |
format |
Article in Journal/Newspaper |
author |
Hofer, Julian Ansmann, Albert Althausen, Dietrich Engelmann, Ronny Baars, Holger Abdullaev, Sabur F. Makhmudov, Abduvosit N. |
author_facet |
Hofer, Julian Ansmann, Albert Althausen, Dietrich Engelmann, Ronny Baars, Holger Abdullaev, Sabur F. Makhmudov, Abduvosit N. |
author_sort |
Hofer, Julian |
title |
Long-term profiling of aerosol light extinction, particle mass, cloud condensation nuclei, and ice-nucleating particle concentration over Dushanbe, Tajikistan, in Central Asia |
title_short |
Long-term profiling of aerosol light extinction, particle mass, cloud condensation nuclei, and ice-nucleating particle concentration over Dushanbe, Tajikistan, in Central Asia |
title_full |
Long-term profiling of aerosol light extinction, particle mass, cloud condensation nuclei, and ice-nucleating particle concentration over Dushanbe, Tajikistan, in Central Asia |
title_fullStr |
Long-term profiling of aerosol light extinction, particle mass, cloud condensation nuclei, and ice-nucleating particle concentration over Dushanbe, Tajikistan, in Central Asia |
title_full_unstemmed |
Long-term profiling of aerosol light extinction, particle mass, cloud condensation nuclei, and ice-nucleating particle concentration over Dushanbe, Tajikistan, in Central Asia |
title_sort |
long-term profiling of aerosol light extinction, particle mass, cloud condensation nuclei, and ice-nucleating particle concentration over dushanbe, tajikistan, in central asia |
publisher |
Katlenburg-Lindau : EGU |
publishDate |
2020 |
url |
https://oa.tib.eu/renate/handle/123456789/6227 https://doi.org/10.34657/5274 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Atmospheric Chemistry and Physics 20 (2020), Nr. 8 |
op_rights |
CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.34657/5274 |
_version_ |
1766401855367151616 |