1.        Čemas, D. and J. Rakovec (2003): The impact of emissions from the Šoštanj thermal power plant on winter SO₂ pollution in Central Europe. Geofizika, 20, 1-21.  

 

ABSTRACT:

 

       The simulation of the wintertime transport of sulphur dioxide based on emissions made in three winter months from December 1999 to February 2000 by the thermo electric power plant located in Šoštanj (TEŠ) in Slovenia is presented. Our study is focused on estimation the regional distribution of SO₂ from this source – the range and level of its impact on Central Europe. The dispersion model MEDIA (Piedelievre et al., 1990), coupled with the meteorological fields of Aladin/LACE (Janoušek 1999), and the operational model for weather forecasting over Central Europe were used. The simulation was run on all winter days of the simulation period. The daily results were accumulated and averaged into monthly and seasonal estimates of air pollution caused by emissions from the TEŠ. As expected, their biggest effects are seen in the nearest regions. Despite the relatively high emission levels, high concentrations with damaging effects are mainly limited to regions approximately 50 km from the source. Slightly increased pollution levels, distinguishable from the background threshold, also spread across other parts of Slovenia, southern parts of Austria, northern parts of Croatia, western Hungary and north-eastern Italy. The TEŠ’s contribution to air pollution in selected neighbouring cities is estimated. On a regional scale, the results of deposition are compared with an LADM evaluation (Berge and Jakobsen, 1998).

 

Keywords: ALADIN mesoscale meteorological model, Eulerian dispersion model MEDIA, thermo-powerplant, sulphur dioxide, winter 1999/2000

 

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2.        Bencetić Klaić, Z., D. Belušić, V. Grubišić, L. Gabela and L. Ćoso (2003): Mesoscale airflow structure over the northern Croatian coast during MAP IOP – a major bora event. Geofizika, 20, 23-61.

 

ABSTRACT:

 

       We have investigated a strong Bora event over the Northern Adriatic, which occurred on 7 November 1999 during MAP IOP 15. The wind field, potential temperature, vertical component of relative vorticity, and turbulent kinetic energy in the lower troposphere were simulated by a nonhydrostatic mesoscale model (MEMO), which was run at a very fine horizontal resolution with the grid spacing of 1 km. Our model simulation accurately reproduced the timing of the Bora event, and the modeled fields exhibited a good agreement with routinely measured winds along the Croatian coast as well as a large degree of consistence with the MAP measurements offshore. The model results also provided a detailed view of the hydraulic airflow structure and thermodynamic conditions during the Bora event. Our simulation results confirm the existence of topographically induced vorticity filaments originating in the turbulent regions near the coastal mountains, where these turbulent zones are collocated with the hydraulic jump-like flow features. All of the above processes have the highest intensity in the region of Senj.

 

Keywords: Bora, hydraulic flow, northern Adriatic

 

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3.        Cvitan, L. (2003): Determining wind gusts using mean hourly wind speed. Geofizika, 20, 63-74.

 

ABSTRACT:

 

       This paper presents a way of defining the speed of the strongest gusts in days with long-lasting, relatively strong wind at the Split-Marjan meteorological station. The gusts have been defined on the basis of the maximal mean hourly values of wind speed on the same day at the Split-Marjan location. The relations derived are of a strictly local character while the methodology used to define them could be used generally. This methodology is suitable for the development of a meteorological background to support Croatian standards in designing overhead power-transmission lines.

 

Keywords: Wind gust, mean hourly wind speed, European standards, Croatian standards

 

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4.        Telišman Prtenjak, M. (2003): Main characteristics of sea/land breezes along the eastern coast of the Northern Adriatic. Geofizika, 20, 75-92.

 

ABSTRACT:

 

An average daily wind regime along the Northern Adriatic eastern coast has been examined at 10 meteorological stations for summertime sea/land breeze circulation. The stations considered are Pula-Airport, Opatija, Rijeka, Senj, Malinska, Omišalj, Mali Lošinj, Rab, Zadar and Zadar-Airport. The aim was to examine the frequency, the times of onset and cessation, the average duration of sea/land breezes, and the impact of the Coriolis force on the wind vector rotation at chosen stations. The results are comparable with corresponding studies of mid-latitude locations. For two stations, an anticlockwise rotation has been discovered (Malinska and Senj), while the remaining stations showed a clockwise rotation, which prevails on the northern hemisphere coasts.

Keywords: Sea breeze, land breeze, Northern Adriatic

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5.        Krajcar, V. (2003): Statistical approach to wind induced currents in the Northern Adriatic. Geofizika, 20, 93-104.

 

ABSTRACT:

 

       Wind induced currents in the Northern Adriatic were analysed from a statistical point of view based on a 10 year long meteorological data set and a large amount of current-meter data measured in the same period at two stations. More than a hundred Bora and Sirocco episodes were averaged to typical Bora and Sirocco episodes. Using principal component analysis (PCA) it was found that the first four modes explain more than 80% of the total sea current variability. The first two modes describe about 50% of the current variability. There is a significant response of the first mode to Bora forcing and the second mode to Sirocco forcing, in good agreement with an earlier numerical model.

 

Keywords: Northern Adriatic Sea, Bora, Sirocco, wind-driven currents, principal component analysis

 

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6.        Krajcar, V. (2003): Climatology of geostrophic currents in the Northern Adriatic. Geofizika, 20, 105-114.

 

ABSTRACT:

 

       Climatology of the geostrophic currents in the northern Adriatic, based on a large amount of historical data, is documented. The geostrophic circulation can be resolved into the winter circulation, the summer circulation and transition circulations in spring (April and May) and in autumn (September and October). There is a permanent existence of a local cyclonic gyre in Trieste Bay and a northern Adriatic (NAd) current connected with western-middle Adriatic (W-MAd) current throughout the year. During the winter period the circulation in the northern Adriatic is a part of the global Adriatic cyclonic gyre. In the spring starts the meandering of low-salinity water toward the east. This anticyclonic meander comes to the Istrian coast in August and September in conjunction with the Istrian coastal countercurrent (ICCC), suggesting the existence of a sharply defined eastward moving anticyclonic meander from June to September. There is good agreement in August and September between measured residual and calculated baroclinic currents. The northern Adriatic (NAd) cyclonic gyre is present only in December.

 

Keywords: climatology, geostrophic circulation, baroclinic current, northern Adriatic

 

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