Joint International Conference on Long-term Experiments ...

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Figure no.5: Variation of the medium number of tropical
days (maximum temperature ≥30ºC in Crişul Repede
hydrogaphical basin during the period 1970-2005
I II III IV V VI VII VIII IX X XI XII An
Borod
Oradea
Sacueni
Stâna de Vale
CONCLUSIONS:
1. The frequency of frosty nights rises directly proportional with the height in 11-12
cases/year in the plains and up to 52 cases/year in the mountain area. Frosty nights
appear from November until March in the plains and from October to April in the
mountains, with a maximum value in January, when the highest value of 14.9 days
is recorded at Stâna de Vale, and the lowest value is 4.7 days at Săcueni.
2. The frequency of freezing days raises proportional with the height in 91-96 cases in
the plains, in about 108 cases in the depression area of Borod and up to 182 cases in
the mountains. Throughout the year the highest number of frosty days is produced
in January, 23-24 days in the plains, 25 days in the depression area of Borod and
almost 30 days at Stâna de Vale.
3. The frequency of winter days increases as the altitude rises, starting with 23
days/year at Oradea, up to approximately 50 days/year at Stâna de Vale. Over the
year, winter days are found from November to March at Borod, Oradea, Săcueni
and from October to April in the mountains. The highest frequency of winter days
is in January, when the records show about 14 days in the mountains, about 9 days
in the depression area of Borod and 10-12 days in the plains.
4. The frequency of summer days is between 80-86 days/year in the plains, about 61
days/year at Borod, while in the mountain area the frequency is only about 9 days/
year. Throughout the year the highest number of summer days is recorded in July
(between 22-23 days) in the plains, about 18 days in the depression area of Borod,
while in the mountains the maximum number of only 4 days is recorded in August.
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