Combining the dissipation method and surface renewal analysis to estimate scalar fluxes from the time traces over rangeland grass near Ione (California)

2009 ◽  
Vol 23 (6) ◽  
pp. 842-857 ◽  
Author(s):  
F. Castellví ◽  
R. L. Snyder
Keyword(s):  
Surface Renewal ◽  
Scalar Fluxes

Surface renewal analysis: a new method to obtain scalar fluxes

1995 ◽  
Vol 74 (1-2) ◽  
pp. 119-137 ◽  
Author(s):  
Kyaw Tha Paw U ◽  
Jie Qiu ◽  
Hong-Bing Su ◽  
Tomonori Watanabe ◽  
Yves Brunet
Keyword(s):  
New Method ◽  
Surface Renewal ◽  
Scalar Fluxes

scholarly journals Surface Renewal as a Significant Mechanism for Dust Emission

2016 ◽  
Author(s):  
Jie Zhang ◽  
Zhenjiao Teng ◽  
Ning Huang ◽  
Lei Guo ◽  
Yaping Shao
Keyword(s):  
Wind Tunnel ◽  
Emission Rate ◽  
Dust Emission ◽  
Limit Surface ◽  
Soil Dust ◽  
Flow Conditions ◽  
Wind Tunnel Experiments ◽  
Surface Renewal ◽  
Surface Particle ◽  
Significant Mechanism

Abstract. Wind-tunnel experiments of dust emissions from different soil surfaces are carried out to better understand dust emission mechanisms. The effects of surface renewal on aerodynamic entrainment and saltation bombardment are analysed in detail, and the measurements are used to test published dust models. It is found that flow conditions, surface particle motions (saltation and creep), soil dust content and ground obstacles all strongly affect dust emission, causing dust emission rate to vary over orders of magnitude. Aerodynamic entrainment is highly effective, if dust supply is unlimited, as in the first 2–3 minutes of our wind-tunnel runs. While aerodynamic entrainment is suppressed by dust supply limit, surface renewal through the motion of surface particles is found to be an effective pathway to remove the supply limit. Surface renewal is also found to be important to the efficiency of saltation bombardment. We demonstrate that surface renewal is a significant mechanism affecting dust emission and recommend that this mechanism be included in future dust models.

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