Nocturnal boundary-layer height: Observations by acoustic sounders and predictions in terms of surface-layer parameters

1988 ◽  
Vol 43 (1-2) ◽  
pp. 65-83 ◽  
Author(s):  
Darko Koracin ◽  
Ruwim Berkowicz
Keyword(s):  
Boundary Layer ◽  
Surface 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.

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

scholarly journals Seasonal Variability in the Diurnal Evolution of the Boundary Layer in a Near-Coastal Urban Environment

2012 ◽  
Vol 29 (5) ◽  
pp. 697-710 ◽  
Author(s):  
Christine L. Haman ◽  
Barry Lefer ◽  
Gary A. Morris
Keyword(s):  
Boundary Layer ◽  
Surface Layer ◽  
Vertical Profiles ◽  
High Wind ◽  
Layer Height ◽  
Boundary Layer Height ◽  
Wind Speeds ◽  
Early Evening ◽  
Stable Surface Layer

Abstract Boundary layer height is estimated during a 21-month period in Houston, Texas, using continuous ceilometer observations and the minimum-gradient method. A comparison with over 60 radiosondes indicates overall agreement between ceilometer- and radiosonde-estimated PBL and residual layer heights. Additionally, the ceilometer-estimated PBL heights agree well with 31 vertical profiles of ozone. Difficulty detecting the PBL height occurs immediately following a frontal system with precipitation, during periods with high wind speeds, and in the early evening when convection is weakening, a new stable surface layer is forming, and the lofted aerosols detected by the lidar do not represent the PBL. Long-term diurnal observations of the PBL height indicate nocturnal PBL heights range from approximately 100 to 300 m throughout the year, while the convective PBL displays more seasonal and daily variability typically ranging from 1100 m in the winter to 2000 m in the summer.

scholarly journals Potential Approach for Single-Peak Extinction Fitting of Aerosol Profiles Based on In Situ Measurements for the Improvement of Surface PM2.5 Retrieval from Satellite AOD Product

2020 ◽  
Vol 12 (13) ◽  
pp. 2174
Author(s):  
Tang-Huang Lin ◽  
Kuo-En Chang ◽  
Hai-Po Chan ◽  
Ta-Chih Hsiao ◽  
Neng-Huei Lin ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Surface Layer ◽  
Planetary Boundary Layer ◽  
Regional Scale ◽  
Satellite Observations ◽  
Aerosol Extinction ◽  
Planetary Boundary Layer Height ◽  
Layer Height ◽  
Boundary Layer Height

The vertical distribution of aerosols is important for accurate surface PM2.5 retrieval and initial modeling forecasts of air pollution, but the observation of aerosol profiles on the regional scale is usually limited. Therefore, in this study, an approach to aerosol extinction profile fitting is proposed to improve surface PM2.5 retrieval from satellite observations. Owing to the high similarity of the single-peak extinction profile in the distribution pattern, the log-normal distribution is explored for the fitting model based on a decadal dataset (3248 in total) from Micro Pulse LiDAR (MPL) measurements. The logarithmic mean, standard deviation, and the height of peak extinction near-surface (Mode) are manually derived as the references for model construction. Considering the seasonal impacts on the planetary boundary layer height (PBLH), Mode, and the height of the surface layer, the extinction profile is then constructed in terms of the planetary boundary layer height (PBLH) and the total column aerosol optical depth (AOD). A comparison between fitted profiles and in situ measurements showed a high level of consistency in terms of the correlation coefficient (0.8973) and root-mean-square error (0.0415). The satellite AOD is subsequently applied for three-dimensional aerosol extinction, and the good agreement of the extinction coefficient with the PM2.5 within the surface layer indicates the good performance of the proposed fitting approach and the potential of satellite observations for providing accurate PM2.5 data on a regional scale.

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
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