Quantifying contributions of natural and anthropogenic dust emission from different climatic regions

Chen, Siyu; Jiang, Nanxuan; Huang, Jianping; Xu, Xiaoguang; Zhang, Huiwei; Zang, Zhipeng; Huang, Kangning; Xu, Xiaocong; Wei, Yun; Guan, Xiaodan; Zhang, Xiaorui; Luo, Yuan; Hu, Zhiyuan; Feng, Tian

doi:10.1016/j.atmosenv.2018.07.043

Cited by 63 publications

(53 citation statements)

References 87 publications

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“…The vertical profiles of extinction coefficients for the three main aerosol types (total aerosol, pure dust and polluted dust) are presented in Figure 6. Here, polluted dust is defined as the mixture of pure dust and smoke particles generated from biomass burning, and total aerosol includes clean marine, pure dust, polluted dust, polluted continental, clean continental, polluted dust and smoke components [42]. Except for a small proportion of polluted dust in DJF, pure dust was the only component of the total aerosols over the dust source regions (TD and GD), showing that pure dust dominated throughout the year.…”

Section: Extinction Coefficient Of Pure and Polluted Dustmentioning

confidence: 99%

Vertical Structures of Dust Aerosols over East Asia Based on CALIPSO Retrievals

et al. 2019

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The spatiotemporal and especially the vertical distributions of dust aerosols play crucial roles in the climatic effect of dust aerosol. In the present study, the spatial-temporal distribution of dust aerosols over East Asia was investigated using Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) retrievals (01/2007-12/2011) from the perspective of the frequency of dust occurrence (FDO), dust top layer height (TH) and profile of aerosol subtypes. The results showed that a typical dust belt was generated from the dust source regions (the Taklimakan and Gobi Deserts), in the latitude range of 25 • N~45 • N and reaching eastern China, Japan and Korea and, eventually, the Pacific Ocean. High dust frequencies were found over the dust source regions, with a seasonal sequence from high to low as follows: spring, summer, autumn and winter. Vertically, FDOs peaked at about 2 km over the dust source regions. In contrast, FDOs decreased with altitude over the downwind regions. On the dust belt from dust source regions to downwind regions, the dust top height (TH) was getting higher and higher. The dust TH varied in the range of 1.9-3.1 km above surface elevation (a.s.e.), with high values over the dust source regions and low values in the downwind areas, and a seasonally descending sequence of summer, spring, autumn and winter in accord with the seasonal variation of the boundary layer height. The annual AOD (Aerosol Optical Depth) was generally characterized by two high and two low AOD centers over East Asia. The percent contribution of the Dust Aerosol Optical Depth to the total AOD showed a seasonal variation from high to low as follows: spring, winter, autumn and summer. The vertical profile of the extinction coefficient revealed the predominance of pure dust particles in the dust source regions and a mixture of dust particles and pollutants in the downwind regions. The dust extinction coefficients over the Taklimakan Desert had a seasonal pattern from high to low as follows: spring, winter, summer and autumn. The results of the present study offered an understanding of the horizontal and vertical structures of dust aerosols over East Asia and can be used to evaluate the performance aerosol transport models.

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Section: Extinction Coefficient Of Pure and Polluted Dustmentioning

confidence: 99%

Vertical Structures of Dust Aerosols over East Asia Based on CALIPSO Retrievals

et al. 2019

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“…Yuan et al (2019) reported good progress in simulating the spatial-temporal evolution of a severe dust storm that occurred in Asia using the WRF-Chem model and also highlighted some shortages. Additionally, Chen et al (2018) estimated the divergences in the natural and anthropogenic dust emission fluxes among different climatic regions in the world. They found that the natural dust sources contributed 81% of the global dust emissions and that anthropogenic sources contributed the remaining 19% (Chen et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, Chen et al (2018) estimated the divergences in the natural and anthropogenic dust emission fluxes among different climatic regions in the world. They found that the natural dust sources contributed 81% of the global dust emissions and that anthropogenic sources contributed the remaining 19% (Chen et al 2018). They also concluded that the concentrate anthropogenic dust events mainly occur in semi-arid, sub-humid and humid regions.…”

Section: Introductionmentioning

confidence: 99%

Impact of drought on dust storms: case study over Southwest Iran

Javadian

Behrangi

Sorooshian

2019

Environ. Res. Lett.

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Dust storms are common meteorological events in arid and semi-arid regions, particularly in Southwest Iran (SWI). Here we study the relation between drought events in Iraq and dust storms in SWI between 2003 and 2018. The HYSPLIT model showed that central and southern Iraq are the main dust sources for SWI. Mean annual aerosol optical depth (AOD) analysis demonstrated that 2008 and 2009 were the dustiest years since 2003 and there is an increased frequency of summertime extreme dust events in the years 2008 and 2009. The Standardized Precipitation Evapotranspiration Index revealed that drought in Iraq significantly affects dust storms in Iran. Similarly, dramatic desiccation of Iraq wetlands has contributed to increasing fall dust events in SWI. AOD in SWI is highly correlated (−0.76) with previous-month vapor pressure deficit (VPD) over Iraq, demonstrating the potential of VPD for dust event forecasting.

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“…In recent years, the rapid increase in human activities has resulted in a significant increase in anthropogenic aerosols including both sulphate and carbonaceous aerosols throughout the world (Huang et al ., ; ; ; Chen et al ., ; ; Zhu et al ., ; Jia et al ., ; Liu et al ., ). There is clear and rapidly growing evidence that atmospheric aerosols have profound impacts on the thermodynamic and radiative energy budgets of the Earth (Andreae et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Association of anthropogenic aerosols with subtropical drought in East Asia

Liu

Shao

et al. 2019

Intl Journal of Climatology

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Anthropogenic aerosols play an important role in altering the radiation budget and Earth's climate. In this study, the association of anthropogenic aerosols with subtropical drought in East Asia is investigated with multisource data and simulations of Coupled Model Intercomparison Project Phase 5 (CMIP5) models. The result shows that the increase in anthropogenic aerosols partially contributes to the zonal drought at subtropical latitudes in East Asia from 1970. In East Asia, sulphate is the dominant type of anthropogenic aerosol and is mainly distributed over the southeastern China. Due to the sulphate aerosols, the geopotential height decreases/increases significantly at the upper‐/lower‐level atmosphere in the subtropical region, with a maximum variation at approximately 30°N. Consequently, the downward motion of air is intensified in the subtropical region. Ultimately, the precipitation amount in the vicinity of the subtropical region is significantly diminished, with a maximum decrease at approximately 30°N. In contrast, the sulphate aerosols could induce more precipitation over the tropical region. In conclusion, the anthropogenic aerosols have an important impact on precipitation in East Asia. In the future, with the intensification of human activities, the contribution of anthropogenic aerosols to aridification is an inevitable question.

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Quantifying contributions of natural and anthropogenic dust emission from different climatic regions

Cited by 63 publications

References 87 publications

Vertical Structures of Dust Aerosols over East Asia Based on CALIPSO Retrievals

Vertical Structures of Dust Aerosols over East Asia Based on CALIPSO Retrievals

Impact of drought on dust storms: case study over Southwest Iran

Association of anthropogenic aerosols with subtropical drought in East Asia

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