2.
Supić, N.
and M. Orlić (1992): Annual cycle of sea surface
temperature along the east Adriatic coast. Geofizika, 9, 79-97.
ABSTRACT:
Time series of sea
surface temperature (SST), measured over some 20-year interval at 21 stations
along the east Adriatic coast, are analyzed. By means
of the Fourier analysis the average annual cycle of temperature is documented
and the year-to-year variability of various SST-related parameters is
described. It is shown that amplitudes of the first harmonic of the annual cycle
are decreasing and its phases increasing in an offshore direction. The
amplitudes range from 5.4 to 8.0 °C, the phases vary from 7.2 to 7.5 months (implying
maximal time lag of nine days). The variability is mostly controlled by the
autumn/winter cooling process. Amplitude of the first harmonic is anomalously
low at Senj, whereas the corresponding phase does not
depart from the typical coastal values. The finding is due to the exceptionally
low summer SSTs that occur in the vicinity of Senj.
At the Sv. Ivan station (near Rovinj)
the spring/summer heating is significantly faster than the autumn/winter
cooling. This can be ascribed to the influence of the Po River waters, which
spread over the open Adriatic in spring/summer, but are mostly confined to the western coast in
autumn/winter. The year-to-year changes of all parameters considered are found
to be much smaller than the multi-year average values, and in some cases prove
to be small even if compared with the spatial variations of the long-term
averages.
[PDF]
3.
Franić, Z. and A. Bauman (1992): Activity distribution of 90Sr and 137Cs
in the Adriatic surface sea-water and fallout along the Croatian coast. Geofizika,
9, 99-108.
ABSTRACT:
The activities of 90Sr in the surface waters of the Adriatic Sea were investigated
twice a year over the period 1963 – 1990 at four locations. A tendency was
noted for the maximum concentrations to occur in the first half of the year.
This can be explained by reflection of common spring activity peak on
surrounding land masses. The 90Sr activity of the North Adriatic region was greater
than the activities of south regions in both spring and autumn. The main
residence time of 90Sr in the mixed sea-water layer was practically
identical at all locations. The lower limit of 90Sr sedimentation
rate in the Adriatic Sea was estimated to be 2.4 x 10-8 m s-1, the upper
limit being 4.9 x 10-7 m s-1. The Chernobyl
nuclear accident did not affect the activity of 90Sr in the Adriatic
surface waters.
[PDF]
4.
Pennas, P.
J. (1992): Interdiurnal variability of sunshine
duration in Greece. Geofizika,
9, 69-77.
ABSTRACT:
The variations of the
sunshine duration from one day to the next, which are known as interdiurnal variations, are studied for three
meteorological stations in Greece, by using the same decade
(1971 – 1980) data information. The stations used can
satisfactorily cover the geographical area of Greece,
since they lie on a merdional axis which extends all
along the country. The study consists of the examination of the steady
conditions, the rises and falls, as well as the variations irrespective of
sign. The interdiurnal variation of sunshine duration shows generally higher values in
the cold period than in the warm one, and particularly, the months of April and
May indicate higher values for the three stations. This finding is due to the interdiurnal cloud variation, which is more intense in the
cold period and in northernmost station than in the warm period and in the
southernmost station, and is related to the regime of the general atmospheric
circulation over the Mediterranean area.
[PDF]
5.
Muço, B.
and P. Minga (1992): Anelastic-attenuation
coefficient g and the correlation of Ao
values of Richter magnitude formula for Albania. Geofizika, 9, 123-132.
ABSTRACT:
Using some graphical and analytical methods recommended mostly
by American authors, a value of g = 0.007052 km-1
is determined for 1 Hz Lg surface waves of near
earthquakes of Albania. Starting from this value of g, a reevaluation of the corrections for the Ao factor in the Richter’s magnitude
formula for Albania is also carried out.
For epicentral distances 80-700 km
the difference in magnitude determination between the values obtained using
tabulated Richter factor and corrected values is 0.1-0.4.
[PDF]
6.
Penzar,
B., I. Penzar, J. Juras and
A. Marki (1992): Brief review of the climatic
fluctuations recorded in Zagreb between 1862 and 1990. Geofizika, 9, 57-67.
ABSTRACT:
In reference to the
publication Long-term meteorological measurements at Zagreb: 1862
– 1990 (Penzar et al., 1992) the preliminary
information on the climatic trends as well as on the comparison of 30-year
averages within the whole period of measurements is given. The changes of the
mean annual air temperatures observed in Zagreb in the period of more
than a hundred years are proved to be similar to the changes of the mean
temperature of the Earth as a whole. A rise in temperature is most obvious
during the heating season. From the minima and maxima of the mean values of
temperature observed in periods of 30 years it follows that the lowest
temperatures took place at the end of the 19th century in all the
months except August. In the second and the third quarter of the 20th
century the most clouded summers, autumns and winters were observed, and in the
second half and at the end of the 19th century a period with the
largest number of clear days was registered. The middle of the 20th
century was the driest period. It is also evident that the annual values of air
pressure and rainfall changed mainly in the opposite direction. The climatic
fluctuations in October were most apparent as they were observed on several
climatic elements at the same time.
[PDF]
7.
Singh,
H. N., V. Raghavan and G. K. Raju
(1992): On relation between seismicity and tectonic
features of Idukki region, Southwestern India. Geofizika,
9, 109-122.
ABSTRACT:
The detailed
investigations of the lineament and seismicity data
of Idukki area have been carried out in connection
with the location of June 7, 1988 earthquake and its
associated significant aftershocks. The analysis of lineament data has
indicated three major lineaments namely Idamalayar, Periyar and Kambam which have
influenced the entire lineament fabric of the Idukki
area. The study has indicated that the June 7,
1988
earthquake was associated with Periyar lineament in Nedumkandam area which has been found to be located at a
distance of 22 km off Idukki. It has been observed
that the isoseismals pertaining to maximum intensity
VI MM and above show unidirectional elongation in WNW-ESE while lower intensity
isoseismals have bi-directional elongation in WNW-ESE
and NE-SW. The Periyar lineament trending WNW-ESE and
NE-SW trending Kambam lineament have served as
conduits for the propagation of seismic energy over long distances since its
transmission is more efficient along rupture zones than in the transverse
direction.
[PDF]
8.
Jadrijević,
V., T. Toth and I. Fischer-Palković (1992): Data bases in the
filed of geosciences. Geofizika,
9, 133-150. (in Croatian)
ABSTRACT:
Polling
of scientific research workers in Croatia,
conducted within the research project Information System for Natural and
Technical Sciences 5-11-139, financed by the Ministry of Science, Technology
and Informatics of the Republic of
Croatia, showed
that scientists are not adequately informed about the existence of data bases
and the possibilities of their perusal. The object of the paper is to acquaint
potential users with specialized data bases from the field of geosciences. It
gives a general description of the data bases, and their division concerning to
their structure, and to the machine readable medium in which they are
available. Intermediary information centers in Croatia are listed. Finally, a
survey is given of the major data bases relating to geosciences, stating their names
and kinds, subjects they include, manufacturers and hosts, utilization
conditions, contents, language used geographical area covered, time periods
covered by stored data as well as the printed equivalents available.
[PDF]
9.
Penzar,
I., J. Juras and A. Marki
(1992): Long-term meteorological measurements at Zagreb: 1862 – 1990. Geofizika, 9 (suppl.),
1-171.
ABSTRACT:
Results of long-term
meteorological observations and measurements, carried out at the Zagreb-Grič Observatory
for the period of 129 years, have been presented. Climatic data represent a
homogeneous sequence, as the location of the Observatory has remained
unchanged, whereas instruments inside the Observatory have been only slightly
and insignificantly changed. In a view of the fact that there
are also autographs working at the Observatory and that hourly values of
meteorological parameters are available, the analyzed data refer to the
standard climatological observation times (7, 14 and
21 h).
The Zagreb-Grič Observatory was in charge
of the Andrija Mohorovičić
Geophysical Institute from the start of its work until 1986, and has since been
put under the management of the State Hydrometeorological
Institute. With their permission sequence of measurements was completed until
1990.