PWE-Based Radar Equation to Predict Backscattering of Millimeter-Wave in a Sand and Dust Storm

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Jean-Fu Kiang
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pp. 104006
Author(s):  
杨瑞科 Yang Ruike ◽  
朱传帅 Zhu Chuanshuai ◽  
刘科祥 Liu Kexiang

2017 ◽  
Vol 46 (1) ◽  
pp. 104006
Author(s):  
杨瑞科 Yang Ruike ◽  
朱传帅 Zhu Chuanshuai ◽  
刘科祥 Liu Kexiang

2015 ◽  
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pp. 567-578 ◽  
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Hui Cao ◽  
Jian Liu ◽  
Guizhou Wang ◽  
Guang Yang ◽  
Lei Luo

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Eltahir Idris Eltahir Mohamed ◽  
Elfatih A. A. Elsheikh ◽  
A. Awad Babiker ◽  
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Atmosphere ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 108
Author(s):  
Jikang Wang ◽  
Bihui Zhang ◽  
Hengde Zhang ◽  
Cong Hua ◽  
Linchang An ◽  
...  

Northern China experienced a severe sand and dust storm (SDS) on 14/15 March 2021. It was difficult to simulate this severe SDS event accurately. This study compared the performances of three dust-emission schemes on simulating PM10 concentration during this SDS event by implementing three vertical dust flux parameterizations in the Comprehensive Air-Quality Model with Extensions (CAMx) model. Additionally, a statistical gusty-wind model was implemented in the dust-emission scheme, and it was used to quantify the gusty-wind contribution to dust emissions and peak PM10 concentration. As a result, the LS scheme (Lu and Shao 1999) produced the minimum errors for peak PM10 concentrations, the MB scheme (Marticorena and Bergametti 1995) underestimated the PM10 concentrations by 70–90%, and the KOK scheme (Kok et al. 2014) overestimated PM10 concentrations by 10–50% in most areas. The gusty-wind model could reasonably reproduce the probability density function of 2-min wind speeds. There were 5–40% more dust-emission flux and 5–40% more peak PM10 concentrations generated by the gusty wind than the hourly wind in the dust-source regions. The increase of peak PM10 concentration caused by gusty wind in the non-dust-source regions was higher than in the dust-source regions, with 10–50%. Implementing the gusty-wind model could help improve the LS scheme’s performance in simulating PM10 concentrations of this severe SDS event. More work is still needed to investigate the reliability of the gusty-wind model and LS scheme on various SDS events.


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