Improving the diagnostic relation for the nocturnal boundary-layer height

1990 ◽  
Vol 53 (1-2) ◽  
pp. 191-198 ◽  
Author(s):  
Claude Estournel ◽  
Daniel Guedalia
Keyword(s):  
Boundary Layer ◽  
Nocturnal Boundary Layer ◽  
Layer Height ◽  
Boundary Layer Height

Nocturnal boundary layer height prediction from surface routine meteorological data

1998 ◽  
Vol 68 (3-4) ◽  
pp. 177-186 ◽  
Author(s):  
M. Tombrou ◽  
D. Founda ◽  
D. Boucouvala
Keyword(s):  
Boundary Layer ◽  
Meteorological Data ◽  
Nocturnal Boundary Layer ◽  
Layer Height ◽  
Boundary Layer Height ◽  
Height Prediction

A Rate Equation for the Nocturnal Boundary-Layer Height

1981 ◽  
Vol 38 (7) ◽  
pp. 1418-1428 ◽  
Author(s):  
F. T. M. Nieuwstadt ◽  
H. Tennekes
Keyword(s):  
Boundary Layer ◽  
Rate Equation ◽  
Nocturnal Boundary Layer ◽  
Layer Height ◽  
Boundary Layer Height

scholarly journals Estimating the atmospheric boundary layer height over sloped, forested terrain from surface spectral analysis during BEARPEX

2010 ◽  
Vol 10 (11) ◽  
pp. 25759-25801 ◽  
Author(s):  
W. Choi ◽  
I. C. Faloona ◽  
M. McKay ◽  
A. H. Goldstein ◽  
B. Baker
Keyword(s):  
Boundary Layer ◽  
Atmospheric Boundary Layer ◽  
Sierra Nevada ◽  
Sonic Anemometer ◽  
Coniferous Forest ◽  
Power Spectra ◽  
Nocturnal Boundary Layer ◽  
Layer Height ◽  
Boundary Layer Height ◽  
Stable Conditions

Abstract. In this study the atmospheric boundary layer (ABL) height (zi) over complex, forested terrain is estimated based on the power spectra and the integral length scale of horizontal winds obtained from a three-axis sonic anemometer during the BEARPEX (Biosphere Effects on Aerosol and Photochemistry) Experiment. The zi values estimated with this technique showed very good agreement with observations obtained from balloon tether sonde (2007) and rawinsonde (2009) measurements under unstable conditions (z/L < 0) at the coniferous forest in the California Sierra Nevada. The behavior of the nocturnal boundary layer height (h) and power spectra of lateral winds and temperature under stable conditions (z/L > 0) is also presented. The nocturnal boundary layer height is found to be fairly well predicted by a recent interpolation formula proposed by Zilitinkevich et al. (2007), although it was observed to only vary from 60–80 m during the experiment. Finally, significant directional wind shear was observed during both day and night with winds backing from the prevailing west-southwesterlies in the ABL (anabatic cross-valley circulation) to consistent southerlies in a layer ~1 km thick just above the ABL before veering to the prevailing westerlies further aloft. We show that this is consistent with the forcing of a thermal wind driven by the regional temperature gradient directed due east in the lower troposphere.

scholarly journals Evaluating the Governing Factors of Variability in Nocturnal Boundary Layer Height Based on Elastic Lidar in Wuhan

2016 ◽  
Vol 13 (11) ◽  
pp. 1071 ◽  
Author(s):  
Wei Wang ◽  
Feiyue Mao ◽  
Wei Gong ◽  
Zengxin Pan ◽  
Lin Du
Keyword(s):  
Boundary Layer ◽  
Nocturnal Boundary Layer ◽  
Layer Height ◽  
Boundary Layer Height

scholarly journals Estimating the atmospheric boundary layer height over sloped, forested terrain from surface spectral analysis during BEARPEX

2011 ◽  
Vol 11 (14) ◽  
pp. 6837-6853 ◽  
Author(s):  
W. Choi ◽  
I. C. Faloona ◽  
M. McKay ◽  
A. H. Goldstein ◽  
B. Baker
Keyword(s):  
Boundary Layer ◽  
Atmospheric Boundary Layer ◽  
Sierra Nevada ◽  
Sonic Anemometer ◽  
Power Spectra ◽  
Nocturnal Boundary Layer ◽  
Wind Component ◽  
Layer Height ◽  
Boundary Layer Height ◽  
Stable Conditions

Abstract. The atmospheric boundary layer (ABL) height (zi) over complex, forested terrain is estimated based on the power spectra and the integral length scale of cross-stream winds obtained from a three-axis sonic anemometer during the two summers of the BEARPEX (Biosphere Effects on Aerosol and Photochemistry) Experiment. The zi values estimated with this technique show very good agreement with observations obtained from balloon tether sondes (2007) and rawinsondes (2009) under unstable conditions (z/L < 0) at the coniferous forest in the California Sierra Nevada. On the other hand, the low frequency behavior of the streamwise upslope winds did not exhibit significant variations and was therefore not useful in predicting boundary layer height. The behavior of the nocturnal boundary layer height (h) with respect to the power spectra of the v-wind component and temperature under stable conditions (z/L > 0) is also presented. The nocturnal boundary layer height is found to be fairly well predicted by a recent interpolation formula proposed by Zilitinkevich et al. (2007), although it was observed to only vary from 60–80 m during the 2009 experiment in which it was measured. Finally, significant directional wind shear was observed during both day and night soundings. The winds were found to be consistently backing from the prevailing west-southwesterlies within the ABL (the anabatic cross-valley circulation) to southerlies in a layer ~1–2 km thick just above the ABL before veering to the prevailing westerlies further aloft. This shear pattern is shown to be consistent with the forcing of a thermal wind driven by the regional temperature gradient directed east-southeast in the lower troposphere.

The difference in the boundary layer height between urban and suburban areas in Beijing and its implications for air pollution

2021 ◽  
pp. 118552
Author(s):  
Meng Wang ◽  
Guiqian Tang ◽  
Yusi Liu ◽  
Minjin Ma ◽  
Miao Yu ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Air Pollution ◽  
Layer Height ◽  
Boundary Layer Height ◽  
Suburban Areas ◽  
The Difference

scholarly journals Technical note: Boundary layer height determination from Lidar for improving air pollution episode modelling: development of new algorithm and evaluation

2017 ◽  
Author(s):  
Ting Yang ◽  
Zifa Wang ◽  
Wei Zhang ◽  
Alex Gbaguidi ◽  
Nubuo Sugimoto ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Air Pollution ◽  
High Performance ◽  
Accurate Determination ◽  
Technical Note ◽  
Strong Increase ◽  
Layer Height ◽  
Boundary Layer Height ◽  
Retrieval Algorithms ◽  
The Impact

Abstract. Predicting air pollution events in low atmosphere over megacities requires thorough understanding of the tropospheric dynamic and chemical processes, involving notably, continuous and accurate determination of the boundary layer height (BLH). Through intensive observations experimented over Beijing (China), and an exhaustive evaluation existing algorithms applied to the BLH determination, persistent critical limitations are noticed, in particular over polluted episodes. Basically, under weak thermal convection with high aerosol loading, none of the retrieval algorithms is able to fully capture the diurnal cycle of the BLH due to pollutant insufficient vertical mixing in the boundary layer associated with the impact of gravity waves on the tropospheric structure. Subsequently, a new approach based on gravity wave theory (the cubic root gradient method: CRGM), is developed to overcome such weakness and accurately reproduce the fluctuations of the BLH under various atmospheric pollution conditions. Comprehensive evaluation of CRGM highlights its high performance in determining BLH from Lidar. In comparison with the existing retrieval algorithms, the CRGM potentially reduces related computational uncertainties and errors from BLH determination (strong increase of correlation coefficient from 0.44 to 0.91 and significant decrease of the root mean square error from 643 m to 142 m). Such newly developed technique is undoubtedly expected to contribute to improve the accuracy of air quality modelling and forecasting systems.

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