DIGITALNA ARHIVA ŠUMARSKOG LISTA
prilagođeno pretraživanje po punom tekstu




ŠUMARSKI LIST 7-8/1985 str. 72     <-- 72 -->        PDF

Influence of Weather Conditions on the Forest Fire Occurrence along the Adriatic


Coast and Islands in Croatia during 1984


Summary


Weather conditions characterized by very dry and hot periods along the
Adriatic coast and islands in Croatia are highly dangerous for the forest fire appearance
and its spreading. This paper presents the analysis of weather sequencies
in 1984 caused by the large scale atmospheric circulation, and response of the local
weather to the changes in macroscale atmospheric motions. Local weather elements
known as potential forest fire triggering effects, are combined in a fire weather
index, and numerical values of these indicies are given for a series of meteorological
stations during the warm season April — September 1984 (Table 3). These
values are compared to those in extremely dry year 1983, characterized by a great
number of forest fires and tremendous damages in the Adriatic area (Table 5).
It is shown that the estimated forest fire damages and reported losses of properties
are highly correlated with the spatial and temporal variations of meteorological
fire indicies resulting from both local and large scale yeather characteristics.
In conclusion, the number of classified fire indicies, from very small to
highly dangerous, for each month are compared to the fire combustions (Table 6).
This clearly illustrates that particular weather conditions represent the primary
potentials for forest fire occurrence, and thus the introduced indicies well exhibit
a quantitative form of fire´s manifestation and its danger.