Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 0048-9697 |
EISSN | 1879-1026 |
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 |
推荐引用方式 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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