Comparison of the optical properties of pure and transported anthropogenic dusts measured by ground-based Lidar

Zhang, Zhijuan; Chen, Bin; Huang, Jianping; Liu, Jingjing; Bi, Jun; Zhou, Tian; Huang, Zhongwei

doi:10.5194/acp-2017-1000

Cited by 4 publications

(2 citation statements)

References 39 publications

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“…This is the typical diurnal variation. Guo et al (2014) found a lack of diurnal variation, but a cycle of 4-7 days in the aerosol properties, indicating a reduced PBL diurnal trend during polluted periods. In figure 3 we didn't calculate the PBL, and in figure 5, it did not show the diurnal variation.…”

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confidence: 83%

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Anonymous

2018

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Interactive comment on "Comparison of the optical properties of pure and transported anthropogenic dusts measured by ground-based Lidar" by Zhijuan Zhang et al. Zhijuan Zhang et al. Anonymous Referee #3 General commentsThe authors attempted to establish one or more threshold for distinguishing polluted dust from pure dust using their optical properties (i.e., total attenuated backscattering coefficient, depolarization ratio and color ratio) measured by a ground-based Lidar. They concluded that depolarization ratio threshold of 0.2 could be used to differentiate the polluted and pure dust. The authors presented a good literature review. However, C1 ACPD Interactive commentPrinter-friendly version Discussion paper

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confidence: 83%

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Anonymous

2018

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“…Recent studies by Mahowald et al, 2010 andMulitza et al, 2010, found that the dust load, emission and deposition has increased over the 20 th century, concomitant with the development of agriculture. At the same time, analysis of dust sources [Ginoux et al, 2010], suggests that a significant fraction of transported dust has an anthropogenic origin Zhang et al, 2017] and along with mineral dust particles emitted from natural processes affect the Earth's albedo. Considerable research efforts have been devoted to quantify dust directive radiative forcing [Park and Jeong, 2008;Huang et al, 2009;.…”

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confidence: 99%

Evaluation of the BSC-DREAM8b regional dust model using the 3D LIVAS-CALIPSO product

Konsta

Binietoglou

Gkikas

et al. 2018

Atmospheric Environment

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The ability of regional atmospheric models to accurately represent long-range transport of dust is crucial for describing dust effects on radiation and clouds and for reducing their uncertainties on these processes. The optimized CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) pure-dust product that provides the three-dimensional patterns of dust and its transport pathways is a unique tool that can address the aforementioned model's issues. In this study we use the CALIPSO dust extinction profiles as a tool for examining the performance of the regional dust model BSC-DREAM8b in space and time, for the period 2009-2013 over Northern Africa, the Mediterranean, Europe, Eastern North Atlantic and the Middle East. Our analysis suggests that the model overestimates the dust extinction coefficient above dust source regions in Sahara Desert especially at altitudes lower than 3km at about 0.04 km-1. We also found a slight underestimation of transported dust over Europe and Atlantic Ocean lower than 0.025km-1 of extinction coefficient values all along the vertical column. Over the Mediterranean dust is overestimated (~0.01km-1) in layers higher than 1 km height. Dust in the Middle East is significantly underestimated by the model (~0.05km-1) all along the vertical column especially during warm seasons. The study also provides an analysis of the CALIPSO limitations and uncertainties on the detection of strong dust activity contributing to the differences between the simulations and observations above the dust sources of Bodelé and Algeria.

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Anthropogenic dust: sources, characteristics and emissions

Chen,

Zhang

et al. 2023

Environ. Res. Lett.

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Anthropogenic dust (AD), as a crucial component of particulate matter, is defined as dust emitted through modifying or disturbing soil particles directly or indirectly associated with human activities in urban areas, croplands, pasturelands and dry lakes. The sources, characteristics, and impacts of AD remain poorly studied, in contrast to the large body of research on natural dust (ND). This review summarizes scientific findings published since the 1990s regarding the emissions, physical-chemical characteristics, and spatio-temporal distributions of AD from the micro to the global scale. AD accounts for 5%–60% of the global dust loading, with notable spread in existing estimates. Compared with ND, AD has more complex and variable compositions and physical-chemical properties. Influenced by human disturbances, AD exhibits small particle sizes, easily accessible critical friction velocity, and large emissions. Further research should improve the observations and simulations to investigate the complex interactions among AD, climate change, and human health.

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Comparison of the optical properties of pure and transported anthropogenic dusts measured by ground-based Lidar

Cited by 4 publications

References 39 publications

Respond to Anonymous Referee #3

Respond to Anonymous Referee #3

Evaluation of the BSC-DREAM8b regional dust model using the 3D LIVAS-CALIPSO product

Anthropogenic dust: sources, characteristics and emissions

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