Characteristics of C²_µ derived from ultrasonic anemometer in an urban boundary layer

• Autorzy: Al-Jiboori Monim H. , Jaber Sundus H.

Identyfikatory

DOI

10.22630/PNIKS.2019.28.1.2

• Języki publikacji: EN

Abstrakty

EN

Fast-response observations of three components of wind and air temperature have been applied to calculate the refractive index function coefficient (C²_µ ), which is needed to describe optical wave propagation in a turbulent medium. These were measured by 3D ultrasonic anemometer installed on the roof of the building of Atmospheric Science Department which is 19 m above ground level. Refractive index function coefficient was calculated for various periods of three seasons: winter, spring and summer.Diurnal variations of (C²_µ) have been made at the surface layer for these seasons. The results show that high values ofmean (C²_µ) occurred during the day time more than at night, also they occurred more in summer than in winter and spring. The results of (Cµ2) found to change with atmospheric stability, whereas they inversely decrease under unstable conditions, approximately constant at neutral cases, and increase under stable conditions. Values of (C²_µ) on average appears to be lower during the rainy and foggy weather cases compared to those of clear sky.

Słowa kluczowe

EN

refractive-index structure coefficient; free space optical communication; atmospheric turbulence; optical turbulence; atmospheric stability

• Wydawca: Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
• Czasopismo: Przegląd Naukowy Inżynieria i Kształtowanie Środowiska
• Rocznik: 2019
• Tom: Vol. 28, No. 1
• Strony: 14--24
• Opis fizyczny: Bibliogr. 16 poz., tab., wykr., zdj.

Twórcy

autor

Al-Jiboori Monim H.

• Atmospheric Science Department, College of Science, Palestine Street, P.O. Box 14022 Mustansiriyah University, Baghdad, Iraq

autor

Jaber Sundus H.

• Atmospheric Science Department, College of Science, Palestine Street, P.O. Box 14022 Mustansiriyah University, Baghdad, Iraq e-mail: [e-mail]

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).