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Wyszukujesz frazę "growing period" wg kryterium: Wszystkie pola


Wyświetlanie 1-2 z 2
Tytuł:
Charakterystyka leśnego okresu wegetacyjnego w Polsce na podstawie wybranego scenariusza zmian klimatu
Characteristics of the forest growing season in Poland on the basis of selected scenario of climate changes
Autorzy:
Dragańska, E.
Szwejkowski, Z.
Cymes, I.
Panfil, M.
Powiązania:
https://bibliotekanauki.pl/articles/987189.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Polska
lasy
okres wegetacji
dlugosc okresu wegetacji
zmiany klimatyczne
scenariusze zmian klimatu
forest vegetation period
climate changes
Opis:
The paper presents comparative characteristics of the length as well as start and end dates of the forest vegetation period (FVP) in the years 1981−2010 determined on the basis of the average daily air temperature and data generated for the conditions of two−fold higher CO2 concentration. To simulate meteorological data for that conditions, we applied the WGENK data generator, considering assumptions of GISS Model E scenario of climate change. The results showed that the average start date of FVP in Poland in the period of 1981−2010 was April 25th, while the average end date of FVP was October 10th. The average length of FVP for Poland equalled 165 days. It was discovered that, on average, the FVP start accelerated by 8 days per 30 years and the FVP end was slightly delayed by 3 days per 30 years. During the analyzed period, the FVP in Poland extended by 10 days on average. According to the applied scenario of the climate change, the trend indicates a possible increase in the FVP by 30 days when compared to the present state. The FVP may start 2−3 weeks earlier and finish 1−2 weeks later than presently. The generated data pointed at April 9th as the average date of the FVP start and October 24th as the date of its end.
Źródło:
Sylwan; 2017, 161, 04; 303-311
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uwarunkowania przymrozków na przykładzie epizodu z lipca 1996 roku na Hali Izerskiej w Górach Izerskich w kontekście gospodarki leśnej
The effects of frost conditions on forest management based on the example of the July 1996 period at Hala Izerska in the Izera Mountains
Autorzy:
Urban, G.
Powiązania:
https://bibliotekanauki.pl/articles/1315919.pdf
Data publikacji:
2014
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
Gory Izerskie
Hala Izerska
warunki klimatyczne
przymrozki
okres wegetacji
szkody w lesie
uszkodzenia drzew
uszkodzenia przymrozkowe
frost
growing season
damage to forests
the Izera Mountains
Opis:
This paper presents the characteristics of a frost period that occurred on July 20–23, 1996, in the center of the Izera Mountains in the context of forest management. The source data consisted of air temperature measurements from the author's own work as well as data obtained from archival databases of the Institute of Meteorology and Water Management, Voivodeship Inspectorate of Environmental Protection, the University of Wroc³aw and the Bureau of Forest Management and Geodesy in Brzeg. Due to the unusual time of frost and its intensity, the impact of this particular period was extreme. For the center of the mountain dale Hala Izerska, the estimated probability of frost temperatures of –5.5°C two meters above ground level is 2.4% for the month of July. Therefore, in this area such a sharp decline of Tmin in the middle of the growing season is predicted to occur only once every 40–50 years. In the Izera Mountains, strong nocturnal decreases of Tmin below 0°C during the growing season occur almost every year causing significant damage to silviculture. Represented here by the mountain dale Hala Izerska, the central Izera Mountains are one of the coldest or even the coldest site in Poland in terms of absolute minimums of air temperature during the growing season. Knowledge on the impact of climate, such as thermal factors, on tree stands enables silvicultural work in mountain areas to be optimized, ultimately allowing funding to be rationalized. The distinct climatic conditions of mountain basins and valleys as well as slopes and plateaus of similar altitudes need to be taken into consideration.
Źródło:
Leśne Prace Badawcze; 2014, 75, 4; 367-374
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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