CONSIDERATIONS ON THE
HAIL REGIME IN MOLDAVIA BETWEEN THE SIRET AND PRUT RIVERS
L. APOSTOL , O. MACHIDON
ABSTRACT. – Considerations on the hail regime in Moldavia
between the Siret and Prut rivers. The paper is based primarily on data measured
between 1961 – 2010. They are summarized in tables and their interpretation is
supported by graphs and maps. The used data come from climatological weather
stations and rainfall stations that have operated continuously in the analyzed
interval [4], [5]. In order to establish the trend, we used the moving average
method, with a 10 year moving average shifted by one year and the drawing of the
trend line using the specialized module of the EXCEL software. Calculations
based on long strings of observations (1967 - 1998) have shown that the
probability of a small number of days with hail or the absence of the phenomenon
is quite high. At the climatological weather stations in the studied area, the
annual number of days with hail is at levels far below those known in the
literature [3] and it has record values for Romania in some of the rainfall
stations (Motoşeni - 0.14 days / year; Mânzaţi - 0.08 days / year). Higher
values of the annual number of days with hail can be reached only on the
alignements at higher altitude and in the cities. We noticed that it is very
difficult to detect trends, since we are dealing with local factors.
Keywords: hail, spatial distribution, evolution.