Dustfall in China’s western loess plateau as influenced by dust storm and haze events: Fid-Bau Portal

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Dustfall in China’s western loess plateau as influenced by dust storm and haze events

Liu, L.Y. / Shi, P.J. / Gao, S.Y. / Zou, X.Y. / Erdon, H. / Yan, P. / Li, X.Y. / Ta, W.Q. / Wang, J.H. / Zhang, C.L.

AbstractOver a period of 12h, the deposition rates of airborne dust during three dust storm and haze events in March and April 1999 at Lanzhou (36°N, 104°E) decreased successively from 0.43–2.23μgcm⁻²min⁻¹ in initial 2-h intervals to 0.05–0.08μgcm⁻²min⁻¹ in final intervals. Simultaneously, the mass median diameter of the falling dust decreased from 33.3–40.2 to 24.2–32.1μm. The rate of dust deposition during dust storm and dust haze events was 10–25 times higher than the annual average (0.025μgcm⁻²min⁻¹), and a single dust storm or haze event contributed about 3% to the annual dust deposition flux (1.33·10⁴μgcm⁻²yr⁻¹). However, particulate matter <10μm (PM10) in the deposited dust was normally below 10% by number frequency and <0.1% by weight, indicating that dust storm and haze events contributed little PM10 to silt accumulation on the western loess plateau. Most of the fine, PM10 particulates were transported further southeastward and exert more extensive impact on the atmospheric environment of the north hemisphere.

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Dustfall in China’s western loess plateau as influenced by dust storm and haze events

Liu, L.Y. / Shi, P.J. / Gao, S.Y. / Zou, X.Y. / Erdon, H. / Yan, P. / Li, X.Y. / Ta, W.Q. / Wang, J.H. / Zhang, C.L.

AbstractOver a period of 12h, the deposition rates of airborne dust during three dust storm and haze events in March and April 1999 at Lanzhou (36°N, 104°E) decreased successively from 0.43–2.23μgcm⁻²min⁻¹ in initial 2-h intervals to 0.05–0.08μgcm⁻²min⁻¹ in final intervals. Simultaneously, the mass median diameter of the falling dust decreased from 33.3–40.2 to 24.2–32.1μm. The rate of dust deposition during dust storm and dust haze events was 10–25 times higher than the annual average (0.025μgcm⁻²min⁻¹), and a single dust storm or haze event contributed about 3% to the annual dust deposition flux (1.33·10⁴μgcm⁻²yr⁻¹). However, particulate matter <10μm (PM10) in the deposited dust was normally below 10% by number frequency and <0.1% by weight, indicating that dust storm and haze events contributed little PM10 to silt accumulation on the western loess plateau. Most of the fine, PM10 particulates were transported further southeastward and exert more extensive impact on the atmospheric environment of the north hemisphere.

Dustfall in China’s western loess plateau as influenced by dust storm and haze events

Liu, L.Y. / Shi, P.J. / Gao, S.Y. / Zou, X.Y. / Erdon, H. / Yan, P. / Li, X.Y. / Ta, W.Q. / Wang, J.H. / Zhang, C.L.

AbstractOver a period of 12h, the deposition rates of airborne dust during three dust storm and haze events in March and April 1999 at Lanzhou (36°N, 104°E) decreased successively from 0.43–2.23μgcm⁻²min⁻¹ in initial 2-h intervals to 0.05–0.08μgcm⁻²min⁻¹ in final intervals. Simultaneously, the mass median diameter of the falling dust decreased from 33.3–40.2 to 24.2–32.1μm. The rate of dust deposition during dust storm and dust haze events was 10–25 times higher than the annual average (0.025μgcm⁻²min⁻¹), and a single dust storm or haze event contributed about 3% to the annual dust deposition flux (1.33·10⁴μgcm⁻²yr⁻¹). However, particulate matter <10μm (PM10) in the deposited dust was normally below 10% by number frequency and <0.1% by weight, indicating that dust storm and haze events contributed little PM10 to silt accumulation on the western loess plateau. Most of the fine, PM10 particulates were transported further southeastward and exert more extensive impact on the atmospheric environment of the north hemisphere.

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Title:

Dustfall in China’s western loess plateau as influenced by dust storm and haze events

Contributors:

Liu, L.Y. (author) / Shi, P.J. (author) / Gao, S.Y. (author) / Zou, X.Y. (author) / Erdon, H. (author) / Yan, P. (author) / Li, X.Y. (author) / Ta, W.Q. (author) / Wang, J.H. (author) / Zhang, C.L. (author)

Published in:

Atmospheric Environment ; 38 ; 1699-1703

Publication date:

2004-01-07

Size:

5 pages

ISSN:

DOI:

https://doi.org/10.1016/j.atmosenv.2004.01.003

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Dustfall , Dust storm and dust haze , Loess Plateau , PM<inf>10</inf>

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