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Wyszukujesz frazę "wahania" wg kryterium: Wszystkie pola


Wyświetlanie 1-4 z 4
Tytuł:
Cykliczne wahania opadów atmosferycznych w Polsce w latach 1861-1990
Cyclical fluctuations of precipitation in Poland in the years 1861-1990
Autorzy:
Michalska, A.
Powiązania:
https://bibliotekanauki.pl/articles/2085354.pdf
Data publikacji:
1997
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Opis:
The purpose of the paper is to define the cyclical changes of precipitation in six localities in Poland during the period 1861-1990. The cyclical variability of this element of weather was identified with the use of the method of J. Boryczka, consisting in determination and verification of the dense spectra of oscillations - the true periods. Results of the study are in the majority of cases statistically significant. It was shown that precipitation is subject to the several years and a dozen years long cycles, the latter lasting approximately 11 and 12 years, to the cycle of approximately 30 years and the long-term cycles. The long-term cyclicity is the most differentiated within the area of Poland. The precipitation cycles contained in the spectra of oscillations of the consecutive 12-month sums and the sums for the four seasons, as well as for the year as a whole, have been compared with the cycles of solar activity. The comparison implies high similarity of the cycles of precipitation and solar activity. This may be the evidence for the proposition that the changes of solar activity are one of the essential factors determining variation of precipitation in the country. There is especially strong dependence for the approximately 11-year cycles of precipitation and the solar activity (see Table 8, R > 0.6).
Źródło:
Prace i Studia Geograficzne; 1997, 20; 105-124
0208-4589
Pojawia się w:
Prace i Studia Geograficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wahania klimatu Ziemi zdeterminowane cyklicznością parametrów Układu Słonecznego
Fluctuations of the Earths climate determined by the cyclicity of the parameters of the Solar System
Autorzy:
Boryczka, J.
Powiązania:
https://bibliotekanauki.pl/articles/2085365.pdf
Data publikacji:
1997
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Opis:
The paper is composed of seven parts: - Introduction, - The method of "true cycles" for identification of the dense spectra of oscillations, - Chronological sequences characterizing the solar system, - Gravitational influence of planets on solar activity and volcanic eruptions, - Astronomical causes of global warming of climate in 17th-20th centuries, - The holocene cycles of climate in Poland according to the accumulation of organic substances in lake sediments. The purpose of the study was to justify the proposition of the natural - astronomical - conditioning of climate fluctuations on the earth (both the modern ones and those which occurred in the holocene). Enormous cognitive significance is linked with the similarity of the dense spectra of oscillations (the true cycles) of the following groups of variables: climatological (atmospheric circulation, air temperature, precipitation), hydrological (river discharges, the level of Baltic Sea), geological (volcanic eruptions) and astronomical (solar activity, parameters of the solar system). The dense spectra of oscillations of these variables are dominated by the cycles close to the periods of revolution of the four greatest planets (the giants) around the sun: Jupiter (11.86 years), Saturn (29.46 years), Uranus (84.02 years), Neptune (164.70 years), and to the periods of their mutual positions. This implies the proposition of the astronomical causes for the fluctuations of the earth's climate. The identification principle "the dense spectra of oscillations (the true cycles) of the causes and effects are the same" is namely approximately satisfied. The links connecting the variability of the parameters of the solar system ( e.g. acceleration of the sun with respect to the mass center of the solar system, planetary tidal forces on the sun, planetary tidal forces on the earth) are: solar activity and volcanic eruptions, atmospheric circulation and solar radiation. The dense spectra of oscillations were determined with the method of J.Boryczka of "the true cycles". This method consists in identification of the consecutive regression sinusoids with respect to time (the notion of the "regression sinusoid" was introduced by the author of the method), the sinusoids considered having periods regularly spaced, by, say 1/12 = 0.0833 of a year in the range between 0.25 and 300 years. It is shown that climate warming in Europe in 17th-20th centuries - the increasingly warm winters (e.g. in Warsaw- by 1.03°C per century, or in Geneva - by 0.51°C per century)- is the result of superposition of the natural cycles with periods ranging from just a couple to more than 200 years. Along with this, the climate of Poland from 10 thousand years ago was determined (together with B. Wicik) on the basis of accumulation of organic matter in lake sediments (Lakes Wikaryjskie, Gościąż and Święte). The calendar was established according to the datings done with the method of radioactive carbon C¹⁴. An important discovery made by the authors mentioned (Boryczka, Wicik, 1994) is the synchronicity of the cycles of the organic matter accumulated in the sediments of these lakes with the cycles of the parameters of the solar system reaching 7350 years. This constitutes the explanation for the causes of the holocene fluctuations of the earth's climate. They are namely simply the superposition of the natural cycles ranging from several hundred to dozens of thousands of years, conditioned by the parameters of the solar system.
Źródło:
Prace i Studia Geograficzne; 1997, 20; 199-234
0208-4589
Pojawia się w:
Prace i Studia Geograficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wahania natężenia całkowitego promieniowania słonecznego w 55-letniej serii wrocławskiej (1946-2000)
Fluctuations of global solar radiation in the 55years series (1946-2000) from Wroclaw
Autorzy:
Brys, K.
Brys, T.
Powiązania:
https://bibliotekanauki.pl/articles/2085127.pdf
Data publikacji:
2001
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Źródło:
Prace i Studia Geograficzne; 2001, 29; 161-171
0208-4589
Pojawia się w:
Prace i Studia Geograficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena wpływu zmian ciśnienia atmosferycznego na wahania zwierciadła wód podziemnych w małej zlewni nizinnej
Evaluation of changes in barometric pressure influence on groundwater level fluctuations in small lowland basin
Autorzy:
Lenartowicz, Maciej
Zielińska, Karolina
Powiązania:
https://bibliotekanauki.pl/articles/2078107.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Opis:
This paper presents the results of study on unconfined groundwater table fluctuations induced by barometric pressure changes. Integrated Monitoring of the Natural Environment Programme (IMNE) research catchment located within the Kampinos National Park near Warsaw was selected as the study area. The network of 16 piezometers is located in the research catchment and the groundwater levels have been measured there in diurnal time-step since 1994. Atmospheric pressure data were collected via NCDC and Ogimet services from the nearest Institute of Meteorology and Water Management (IMWM) synoptic station Warsaw - Okęcie. Collected data series covered the period from 1994 to 2009. Events of the greatest daily changes in barometric pressure accompanied by groundwater level response (so-called mirror reaction) were selected in the first step. Barometric efficiency was estimated then on that basis. Also the differences in groundwater level response at the time of increase and decrease in atmospheric pressure and during high and low water levels were analyzed. It was found that the barometric efficiency in the piezometers varied from 4 to 16%, which was consistent with the results of other authors. Unfortunately, the divergent results, provided by different methods for estimation of barometric efficiency made the interpretation of data more difficult. Piezometers of water level from 50 to 100 cm represented clear response to barometric pressure changes. However, shallower and deeper water levels did not show an expected effect. Most likely those piezometers were controlled by other factors, such as precipitation, evaporation, infiltration or lateral flow. Using of more detailed (e.g. hourly) data series is highly recommended for further investigations.
Źródło:
Prace i Studia Geograficzne; 2017, 62, 1; 81-98
0208-4589
Pojawia się w:
Prace i Studia Geograficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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