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Impact of mesoscale meteorological processes on anomalous propagation conditions over the northern Adriatic area (CROSBI ID 622581)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija

Telišman Prtenjak, Maja ; Horvat, Igor ; Tomažić, Igor ; Kvakić, Marko ; Viher, Mladen ; Grisogono, Branko Impact of mesoscale meteorological processes on anomalous propagation conditions over the northern Adriatic area. 2015

Podaci o odgovornosti

Telišman Prtenjak, Maja ; Horvat, Igor ; Tomažić, Igor ; Kvakić, Marko ; Viher, Mladen ; Grisogono, Branko

engleski

Impact of mesoscale meteorological processes on anomalous propagation conditions over the northern Adriatic area

The impacts of mesoscale processes on the occurrence of anomalous propagation conditions (named anaprop) for radio waves, including ducts, super refractions and subrefractions, were studied. The chosen formations are the famous bora winds, and the sporadical sea/land breeze (SB/LB) during three selected cases over a large portion of the northern Adriatic. For this purpose, we used available radiosoundings and numerical WRF-ARW model simulations (of real cases and their sensitivity tests) at a horizontal resolution of 1.5 km. The model simulated the occurrences of anaprop satisfactorily, although their intensities and frequency were underestimated at times. Certain difficulties existed in reproducing the vertical profile of the modified refractive index, which is mainly dependent on the accuracy of the modeled relative humidity. The spatial distributions of summer anaprop reveal that the surface layer above the sea (roughly between 30 and 100 m asl) is often covered by super refractions and ducts. The SB is highly associated with the anaprop formations: (i) in the first 100 m asl, where super refractions and ducts form because of the advection of colder and moister air, and (ii) insi de the transition layer between the SB body and the anti-SB current in the form of subrefractions. When a deep convection occurs, all three types of anaprop are caused by the downdraft beneath the cumulonimbus cloud base in its mature phase that creates smaller but significant pools of cold and dry air. The bora wind usually creates an anaprop pattern associated with the hydraulic jump and influences anaprop distribution over the sea surface.

bora; sea/land breeze; cumulonimbus cloud; anomalous propagation; radio waves refraction; WRF model

HRZZ projekt CATURBO #09/151

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Podaci o prilogu

2015.

nije evidentirano

objavljeno

Podaci o matičnoj publikaciji

Podaci o skupu

5th International Conference on Meteorology and Climatology of the Mediterranean

predavanje

02.03.2015-04.03.2015

Istanbul, Turska

Povezanost rada

Fizika, Geologija

Poveznice