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Multiyear changes in sunshine duration in Poland

100%

Podogrocki J.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1994

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tom 405

141-145

In the study the author made use of many years recorded series of sunshine duration data from 8 meteorological stations in Poland. The effect of the geographical position of Poland is such that out of approximately 8760 h of the year only 51 % (about 4500 h) fall in the daytime period, when the sun can be seen above the horizon and fonn the climatic conditions of our country. Sunshine duration, i. e. the duration of time when the sun radiation can reach the Earth surface directly, is between 921 h (Śnieżka, 1912) and 2227 h (Wrocław, 1921). Preliminary analysis indicates that changes in the annual totals have a declining tendency over many years, and at the same time the sunshine duration trend is strongly dependent on the level of atmospheric pollution.

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On solar energy resources in Poland during the vegetation period

100%

Podogrocki J.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1989

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tom 369

As follows from studies on the influx of solar energy in Poland carried out so far, during the vegetation period, lasting from the beginning of April to the end of October, a greater part of the country receives an average of from 2950 to 3150 MJ m⁻² in -the form of total radiation. On the basis of a multi-year series of measurements taken at Brwinów, the author determines the probability of total radiation influx in various time stretches, adopting the decade as a unit of time. Suitable nomograms are prepared following the method proposed by T.H. Tammets.

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Leokadia Kuhn [1918-1998]

100%

Podogrocki J.

Wiadomości Instututu Meteorologii i Gospodarki Wodnej

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1999

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tom 22

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nr 2

123-124

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Metoda interpolacji promieniowania calkowitego dla potrzeb modelowania wzrostu i rozwoju roslin uprawnych w Polsce

51%

Faber A., Czajkowski M., Bloch Z., Podogrocki J.

Fragmenta Agronomica

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1996

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tom 13

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nr 2

57-72

Ograniczanie wyników

2 Zeszyty Problemowe Postępów Nauk Rolniczych

1 Fragmenta Agronomica

1 Wiadomości Instututu Meteorologii i Gospodarki Wodnej

4 Podogrocki J.

1 Bloch Z.

1 Czajkowski M.

1 Faber A.

1 1999

1 1996

1 1994

1 1989

Multiyear changes in sunshine duration in Poland

On solar energy resources in Poland during the vegetation period

Leokadia Kuhn [1918-1998]

Metoda interpolacji promieniowania calkowitego dla potrzeb modelowania wzrostu i rozwoju roslin uprawnych w Polsce