Wind direction
Uncertainty contribution of a wind turbine to the electric field of a DVOR antenna as a function of wind direction and rotor position
... a wind turbine (WT) has the po- tential to distort electromagnetic fields emitted by terrestrial radio navigation ...of wind direction and rotor ...of wind direction and rotor ...
8
Analysis of Stationary Periods During the Perdigão 2017 Campaign
... In terms of the total length of periods, most of the periods considered stationary do not last longer than 42 minutes, although 3 periods of about 1 hour have been found (figure 3.24). Figure 3.3 presents the days when ...
88
The effect of the total solar eclipse of 29 March 2006 on meteorological variables in Greece
... in wind speed and direction during the partial phase before ...5, wind direction changed suddenly from E’ly to W’ly about 40 min after the first contact accompanied by a progressive increase ...
37
Surface gas pollutants in Lhasa, a highland city of Tibet – current levels and pollution implications
... wind direction only under low wind speed, showing a higher level in the NW–N sector, indicating that local emissions of automobiles and heating as well as incense burning to be dominant in ...
10
Stord Orographic Precipitation Experiment (STOPEX): an overview of phase I
... The measurements of STOPEX I cover the time period be- tween 24 September and 16 November 2005. During the campaign, 21 different precipitation events have been iden- tified with respect to the large scale synoptic ...
7
Analysis of wind velocity and release angle effects on discus throw using computational fluid dynamics
... Discus throw is a popular event in track and field athletics competition, in which an athlete throws a heavy disc – called a discus – in an attempt to mark a farther distance than his/her competitors. From the ...
9
An improved second generation wave model
... In this type of model the migration of energy toward the new wind direction and peak frequency is performed slowly, so that the discontinuity between the swell and wind sea tends to [r] ...
21
Analysis of Atmospheric Conditions: Data Quality and Stationarity in Perdigao
... the wind speed shows a steady rise through- out the day until ≈ 20:00, when it sharply decreases, followed by a stationary period of both wind speed and wind direction, until ≈ ...in ...
144
Variáveis meteorológicas e hidrológicas sobre ocorrência de erosão no Baixo São Francisco
... lower wind velocities (Tubelis & Nascimento, 1984; Pereira et ...daytime wind velocity was higher than the nighttime ...and wind direction associated with wind fetch and the ...
8
Atmospheric circulation and climate of the Euro-Atlantic sector since 1685 based on new directional flow indices
... We found that December and February of 1709 were characterized by westerlies and southerlies, with the exception of some persistent intrusions of polar and continental winds, mainly in February. Accordingly, our results ...
194
Environmental forcing on phytoplankton biomass and primary productivity of the coastal ecosystem in Ubatuba region, southern Brazil
... Although no significant peak was observed in the wind direction and speed, data suggest a relationship, at low frequency, between atmospheric forcing and water column stratification, nit[r] ...
17
Rev. bras. meteorol. vol.27 número3
... frequency wind roses regarding different speed ranges in order to gain knowledge of wind ...Moreover wind patterns after calms are analyzed, taking into account that pollutants tend to accumulate ...
10
Two cases of aerodynamic adjustment of sastrugi
... second-generation FlowCapt ™ sensor are shown in Fig. 4. As the friction velocity is the actual dynamic quantity involved in aerodynamic entrainment of surface snow particles (Gallée et al., 2001), it is also plotted on ...
22
J. Aerosp. Technol. Manag. vol.5 número4
... he wind proile at the tower is permanent, but the two Sonics were temporary and operated from September 17–25, ...he wind speed and wind direction data from the proile are sampled at 2 seconds ...
10
The anthropogenic contribution to atmospheric black carbon concentrations in southern Africa: a WRF-Chem modeling study
... shifted wind direction in September, the early be- ginning of the rainy season in the model in October and the overestimation of precipitation ...the wind direction bias for the BC bias is ...
22
Assessment of sea surface temperatures (SST) and seasonal upwelling in SW Portugal
... Meteorological data such as Sea Surface Temperature (SST), Wind direction and Wind speed are important parameters to determine the occurrence of upwelling. This study demonstrates some useful ...
90
Generation of the lower-thermospheric vertical wind estimated with the EISCAT KST radar at high latitudes during periods of moderate geomagnetic disturbance
... vertical- wind direction at F -region heights and the relative location of the auroral oval (Crickmore et ...horizontal wind at F -region heights gen- erally blows equatorward at night due to the ...
15
Risk assessment of atmospheric emissions using machine learning
... We consider releases with a duration much longer than the atmospheric turbulence time scale. Because of the local and regional large-scale atmospheric motions, the wind direction could change significantly, ...
10
Short vertical-wavelength inertia-gravity waves generated by a jet–front system at Arctic latitudes – VHF radar, radiosondes and numerical modelling
... background wind shear, although the vertical wavelength could be accu- rately determined, neither the intrinsic frequency nor the hor- izontal wavelength could be reliably ...the wind in the lower levels ...
15
SURFACE OZONE CONCENTRATIONS AND THE METEOROLOGICAL CONDITIONS AT AN URBAN TROPICAL SITE IN THE SOUTHERN HEMISPHERE
... Apparently the main anthropogenic source of atmospheric pollu- tants in BH is the traffic of vehicles. Since the city has a relatively small territorial area, it is reasonable to suppose a homogeneous emission of both ...
11