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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2017-797
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
07 Sep 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).
9-year spatial and temporal evolution of desert dust aerosols over South-East Asia as revealed by CALIOP
Emmanouil Proestakis1,2, Vassilis Amiridis1, Eleni Marinou1,3, Aristeidis K. Georgoulias4,5, Stavros Solomos1, Stelios Kazadzis6,7, Julien Chimot8, Huizheng Che9,10, Georgia Alexandri4, Ioannis Binietoglou11, Konstantinos A. Kourtidis4, Gerrit de Leeuw12,13, and Ronald J. van der A14 1IAASARS, National Observatory of Athens, Athens, 15236, Greece
2Laboratory of Atmospheric Physics, Department of Physics, University of Patras, 26500, Greece
3Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece
4Laboratory of Atmospheric Pollution and Pollution Control Engineering of Atmospheric Pollutants, Department of Environmental Engineering, Democritus University of Thrace, Xanthi, Greece
5Energy, Environment and Water Research Center, Cyprus Institute, Nicosia, Cyprus
6Institute of Environmental Research and Sustainable Development, National Observatory of Athens, Lofos Koufou, 15236 Penteli, Athens, Greece
7Physikalisch – Meteorologisches Observatorium Davos, World Radiation Center (PMOD/WRC) Dorfstrasse 33, 7260, Davos Dorf, Switzerland
8Department of Geoscience and Remote Sensing (GRS), Civil Engineering and Geosciences, TU Delft, the Netherlands
9Key Laboratory of Atmospheric Chemistry (LAC), Chinese Academy of Meteorological Sciences (CAMS), CMA, Beijing, 100081, China
10Jiangsu Collaborative Innovation Center of Climate Change, Nanjing, 210093, China
11National Institute of R&D for Optoelectronics, Magurele, Romania
12Finnish Meteorological Institute (FMI), Helsinki, Finland
13Department of Physics, University of Helsinki, Helsinki, Finland
14Royal Netherlands Meteorological Institute, De Bilt, Netherlands
Abstract. We present a 3-D climatology of the desert dust distribution over South-East Asia derived using CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) data. To distinguish desert dust from total aerosol load we apply a methodology developed in the framework of EARLINET (European Aerosol Research Lidar Network), the particle linear depolarization ratio and updated lidar ratio values suitable for Asian dust, on multiyear CALIPSO observations (01/2007–12/2015). The resulting dust product provides information on the horizontal and vertical distribution of dust aerosols over SE (South-East) Asia along with the seasonal transition of dust transport pathways. Persistent high D_AOD (Dust Aerosol Optical Depth) values, of the order of 0.6, are present over the arid and semi-arid desert regions. Dust aerosol transport (range, height and intensity) is subject to high seasonality, with highest values observed during spring for northern China (Taklimakan/Gobi deserts) and during summer over the Indian subcontinent (Thar Desert). Additionally we decompose the CALIPSO AOD (Aerosol Optical Depth) into dust and non-dust aerosol components to reveal the non-dust AOD over the highly industrialized and densely populated regions of SE Asia, where the non-dust aerosols yield AOD values of the order of 0.5. Furthermore, the CALIPSO-based short-term AOD and D_AOD time series and trends between 01/2007 and 12/2015 are calculated over SE Asia and over selected sub-regions. Positive trends are observed over northwest and east China and the Indian subcontinent, whereas over southeast China are mostly negative. The calculated AOD trends agree well with the trends derived from Aqua/MODIS (Moderate Resolution Imaging Spectroradiometer), although significant differences are observed over specific regions.

Citation: Proestakis, E., Amiridis, V., Marinou, E., Georgoulias, A. K., Solomos, S., Kazadzis, S., Chimot, J., Che, H., Alexandri, G., Binietoglou, I., Kourtidis, K. A., de Leeuw, G., and van der A, R. J.: 9-year spatial and temporal evolution of desert dust aerosols over South-East Asia as revealed by CALIOP, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-797, in review, 2017.
Emmanouil Proestakis et al.
Emmanouil Proestakis et al.
Emmanouil Proestakis et al.

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Short summary
We provide a 3D climatology of desert dust aerosols over South-East Asia, based on 9 years of CALIPSO observations and an EARLINET methodology. The results provide the horizontal, vertical and seasonal distribution of dust aerosols over SE Asia along with the change of dust transport pathways. The dataset is unique for its potential applications, including the evaluation and assimilation activities in atmospheric simulations and the estimation of the climatic impact of dust aerosols.
We provide a 3D climatology of desert dust aerosols over South-East Asia, based on 9 years of...
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