1.        Trifunac, M. D. (1997): Stresses and intermediate frequencies of strong earthquake acceleration. Geofizika, 14, 1-27.  

 

ABSTRACT:

 

     The peak of smooth Fourier amplitude spectra, ((FS(T))max, of strong motion acceleration recorded in California is modelled via dimensional analysis. In this model, the spectrum amplitudes are proportional to (1) the root-mean-square (r.m.s.) amplitude of the peak stresses on the fault surface in the areas of high stress concentration (asperities), and (2) (log10N)1/2, where N is the number of contributing (sampled) asperities. The results imply simple, one asperity, earthquake events for M ≤ 5, and multiple asperity events for M ≥ 5 (N ~ 10 near M = 7and N ~ 100 near M ~ 8). The r.m.s. value of the peak stress drop on the fault, , appears to increase with magnitude for M ≤ 6, and then it levels off near 100 bars, for M ≥ 6. For M < 6, ((FS(T))max continues to grow with magnitude, because of the larger number of asperities from which the sample is taken (N ~ 100 for M = 8), not because of increasing

Keywords : Strong earthquake acceleration, earthquake stress

 

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2.        Brzović, N. and V. Jurčec (1997): Numerical simulation of the Adriatic cyclone development. Geofizika, 14, 29-46.

 

ABSTRACT:

 

       This paper represents the first attempt to simulate the influence of the Dinaric Alps on the Adriatic cyclone using a high resolution hydrostatic model ALADIN. The reference experiment and two sensitivity studies are carried out to study the orography and diabatic effects on the cyclone development and maintenance. Verification confirms that the appearance of “twin cyclones” on either side of the Apennine peninsula is a realistic feature. The influence of Dinaric Alps is visible in a high-low couplet over the orography and strong winds behind the cyclone and along the coast. In the absence of the Dinaric Alps the cyclone is not bounded to this orography and the low pressure field quickly spreads over the entire Balkan peninsula and weakens. The absence of latent heat release leads to the weaker cyclonic circulation. An intercomparison of three experiments shows that the orographically induced pressure gradients, and not the pressure itself, are essential for the cyclone maintenance. These experiments have shown that the Adriatic cyclone is mainly induced by the Alpine orography whereas the Dinaric Alps through upstream blocking influence the subsynoptic processes over the Adriatic area.

 

Keywords: Numerical simulation, cyclone development, Adriatic cyclone, influence of orography

 

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3.        Penzar, I. and B. Penzar (1997): Weather and climate notes on the Adriatic up to the middle of the 19th century. Geofizika, 14, 47-82.   

 

ABSTRACT:

 

            The paper deals with weather and climate descriptions originating before the establishment of the meteorological station network. The oldest of them stem from as long ago as the second and the first century B.C. They may be found in local and foreign almanacs, reports, letters, newspapers and books. In the first part of the paper records of weather are ordered chronologically. These are casual notes, accounts of somehow peculiar weather events, and even regular, almost daily weather notes written through many years in the 18th century in Makarska. The second segment presents reports on common weather characteristics, i.e. climate attributes. These are mostly wind accounts, particularly of Bura (Bora), but there are also a few climatographies.

 

Keywords: Old meteorological notes, Weather, Climate, the Adriatic

 

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4.        Tiwari, R. K., J. G. Negi and K. N. N. Rao (1997): Detection of long term modulation orbital cycles in the sea level oscillations using clean algorithm of spectral analysis. Geofizika, 14, 133-147.

 

ABSTRACT:

 

The need for a unified astronomical theory of sea-level changes and associated climatic variations motivates the search for Milankovich eccentricity rhythms in the global sea level variations. The available latest sea level record exhibits long term trend with superimposed higher order frequency oscillations. A new powerful spectral technique based on the one dimensional clean deconvolution algorithm, is applied to the global sea level fluctuations record of the past 30 million years. The spectrum analysis reveals statistically significant (at 90% confidence level) and “clean” cyclicity of 2000 kyr, 1250 kyr, 880 kry, 660 kyr, 416 kyr, and 260 kry. Statistically significant sea level cycles indicate possible link with climate and orbital cycles. A principal cycle (Ep) of 413 kyr corresponds to the well known orbital eccentricity cycle. The remaining higher order periodicities are integral multiples of Ep (e.g., Ep/2, 3Ep/2, 2Ep, 3Ep, 5Ep,), equivalent to those of the modulation of orbital eccentricity-precession cycles. Matching periodicities of the sea level changes and climatic rhythms, and long term modulation of orbital variations demonstrate significant role of orbital cycles in these processes and integrate the Milankovich paradigm of orbital forcing to coupled climate-sea level interactions.       

 

Keywords: Sea level oscillations, spectral analysis, clean algorithm

 

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5.        Orlić, M. (1997): The Zagreb scientists, Josip Goldberg in particular, and research of the Adriatic Sea. Geofizika, 14, 83-117. (in Croatian)

 

ABSTRACT:

 

       The activity of S. Brusina and his contemporaries, who laid down the foundation of modern oceanographic investigations in Croatia in the latter half of the 19 th century, is described in the paper. Circumstances which led to organization of the first Croatian research cruises in Kvarner Bay in 1913 and 1914 are then analysed in some detail. Finally, the paper concentrates on J. Goldberg, on the investigation of the Bakar Bay seiches which he carried out with collaborators in 1936, and on the way he influenced oceanographic research performed after World War II.

 

Keywords: Josip Goldberg, research at the Adriatic Sea

 

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6.        Vilibić, I. (1997): Global sea level rise? New techniques for the absolute sea level measurement. Geofizika, 14, 119-131. 

 

ABSTRACT:

 

       A brief review is given of recent works on relative mean sea level, global sea level rising effect and the predictions to year 2100. The influence of vertical crustal movements to relative sea level is visible on the longest sea level records. Both modern space geodetic techniques and absolute gravity measurements have now achieved the accuracy within a centimeter that is compatible with the above quality of mean sea level. The extraction of land movements from the tide gauge record is possible within a decade, so the number of international project have been (etc. SELF) and will be (etc. MedGLOSS) launched with the aim to achieve the absolute sea level.

 

Keywords: Sea level, global sea level rise, GPS, absolute gravimetry

 

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