Arid
DOI10.1016/j.scitotenv.2011.09.068
Improved parameterization of dust emission (PM10) fluxes by the gradient method using the Naiman tower data at the Horqin desert in China
Park, Moon-Soo1; Park, Soon-Ung1; Chun, Youngsin2
通讯作者Park, Soon-Ung
来源期刊SCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
EISSN1879-1026
出版年2011
卷号412页码:265-277
英文摘要

Dust emission/deposition flux has been estimated using the gradient method with the two-level (3 and 15 m high) measured PM10 concentrations and the sonic anemometer measured momentum and kinematic heat fluxes at 8 m high from a 20-m monitoring tower located at Naiman (Horqin desert) in the Asian dust source region in China for the winter of November 2007 to March 2008. The time series of measured PM10, concentration at 3 m high is used to identify the dust event and the non-dust event periods. It is found that the dust emission/deposition flux (F-C) shows a significant diurnal variation with the maximum emission flux of 5.8 kg km(-2) h(-1) at noon and the minimum of -1.6 kg km(-2) h(-1) in the afternoon for the non-dust event cases. Whereas for the dust event cases, the dust emission flux is found to occur when the prevailing winds are westerlies to northerlies with the maximum flux of 1275 kg km(-2) d(-1), while the maximum dust deposition flux of 148 kg km(-2) d(-1) occurs with the prevailing winds of southerlies to easterlies without any diurnal variation. The optimal regression equation between F-C and the friction velocity (u.) for the dust emission cases is found to be F-C=9.55 U.(3.33) with the R-2 value of 0.73. However, this regression equation can be improved by taking into account the convective velocity (w.). The resulting optimal regression equation is found to be F-C=9.3(u. - 0.1w.)(3.19) for the stable stratification (w.<0) with the R-2 value of 0.77 and F-C=10.5 (u.+0.34w.)(4.11) for the unstable stratification (w.>0) with the R-2 value of 0.78, suggesting the importance of the convective velocity on the dust emission flux. (C) 2011 Elsevier B.V. All rights reserved.


英文关键词Convective velocity Dust deposition/emission flux Gradient method Naiman tower Parameterization of dust emission flux
类型Article
语种英语
国家South Korea
收录类别SCI-E
WOS记录号WOS:000298534300031
WOS关键词WIND EROSION ; SALTATION BOMBARDMENT ; EDDY COVARIANCE ; SAND TRANSPORT ; MINERAL DUST ; APRIL 1998 ; ACE-ASIA ; MODEL ; AEROSOL ; SIMULATION
WOS类目Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/170499
作者单位1.Seoul Natl Univ, Ctr Atmospher & Environm Modeling, Seoul 151919, South Korea;
2.Natl Inst Meteorol Res, Seoul 156720, South Korea
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GB/T 7714
Park, Moon-Soo,Park, Soon-Ung,Chun, Youngsin. Improved parameterization of dust emission (PM10) fluxes by the gradient method using the Naiman tower data at the Horqin desert in China[J],2011,412:265-277.
APA Park, Moon-Soo,Park, Soon-Ung,&Chun, Youngsin.(2011).Improved parameterization of dust emission (PM10) fluxes by the gradient method using the Naiman tower data at the Horqin desert in China.SCIENCE OF THE TOTAL ENVIRONMENT,412,265-277.
MLA Park, Moon-Soo,et al."Improved parameterization of dust emission (PM10) fluxes by the gradient method using the Naiman tower data at the Horqin desert in China".SCIENCE OF THE TOTAL ENVIRONMENT 412(2011):265-277.
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