Springer Science and Business Media LLC
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A statistical analysis of the power law and the logarithmic law using wind data from a 164 m tower
Springer Science and Business Media LLC - Tập 20 - Trang 117-123 - 1981
The wind speed distribution with height is analysed by using hourly data for a
full year recorded at 6 levels of a 164 m tower at Nanjing. A statistical error
analysis shows that power law and logarithmic law are best applicable when the
wind is strong. For the height range from 16 to 164 m, the power law represents
the actual speed distribution better than does the logarithmic law.
Comments on a relationship between fluid and immersed-particle velocity fluctuations proposed by Walklate (1987)
Springer Science and Business Media LLC - Tập 43 - Trang 93-98 - 1988
On Reynolds Averaging of Turbulence Time Series
Springer Science and Business Media LLC - Tập 128 - Trang 303-311 - 2008
We show that validity of Reynolds averaging for estimating the (ensemble) mean
of a turbulence time series requires that the series values be both stationary
and uncorrelated. In strict statistical terminology, these two conditions are
jointly designated as independent identically distributed (i.i.d.). Moreover, we
show that when the series values are correlated, knowledge of the correlation
betwe...
A study of atmospheric structures using sodar in relation to land and sea breezes
Springer Science and Business Media LLC - Tập 18 - Trang 361-371 - 1980
Simultaneous observations were made by an acoustic sounder and on a
meteorological tower during the month of May 1978 at the Atomic Power Station
Tarapur. The probing range of the acoustic sounder was 700 m. The meteorological
tower could sense wind and temperature at various levels up to a height of 120
m. The site being close to the sea shore, the thermal environment of the lower
atmosphere is c...
Runway Wake Vortex, Crosswind, and Visibility Detection with a Scintillometer at Schiphol Airport
Springer Science and Business Media LLC - Tập 157 - Trang 481-499 - 2015
We evaluate the performance and investigate the capability of a scintillometer
to detect wake vortices, crosswind and visibility near an airport runway. An
experiment is carried out at Schiphol airport (Amsterdam, The Netherlands),
where an optical scintillometer is positioned alongside a runway. An algorithm
is developed to detect wake vortices, and also the strength of the wake vortex,
from the ...
Influence from Surrounding Land on the Turbulence Measurements Above a Lake
Springer Science and Business Media LLC - Tập 150 - Trang 235-258 - 2013
Turbulence measurements taken at a Swedish lake are analyzed. Although the
measurements took place over a relatively large lake with several km of
undisturbed fetch, the turbulence structure was found to be highly influenced by
the surrounding land during daytime. Variance spectra of both horizontal
velocity and scalars during both unstable and stable stratification displayed a
low frequency peak....
Aircraft Observations of Turbulence Characteristics in the Tropical Cyclone Boundary Layer
Springer Science and Business Media LLC - - 2020
Evaluation and model impacts of alternative boundary-layer height formulations
Springer Science and Business Media LLC - - 1996
Dynamical Initialization of Boundary-Layer Data
Springer Science and Business Media LLC - Tập 87 - Trang 509-514 - 1998
A procedure for the dynamic initialization of wind and temperature fields within
the atmospheric boundary layer (ABL) is presented. The procedure uses
transilient turbulence theory to assess the turbulent fluxes from observed wind
and temperature data, which are used to estimate the eddy transfer coefficients,
so enabling a local closure ABL model to be integrated forward in time to a new
steady s...
Attenuating the Absorption Contribution on $${C_{n^{2}}}$$ Estimates with a Large-Aperture Scintillometer
Springer Science and Business Media LLC - Tập 143 - Trang 261-283 - 2012
Large-aperture scintillometers (LAS) are often used to characterize atmospheric
turbulence by measuring the structure parameter of the refractive index
$${C_{n^{2}}}$$ . However, absorption phenomena can lead to an overestimation of
$${C_{n^{2}}}$$ . By applying an accurate numerical filtering technique called
the Gabor transform to the signal output of a LAS, we improved our knowledge of
the accu...
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