Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: daily air temperature

Sortuj według:

Ogranicz wyniki do:

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Extreme daily air temperatures in Poland (2000-2013)

100%

Szczepanek R.

Infrastruktura i Ekologia Terenów Wiejskich

2014

nr IV/3

This work concentrates on the analysis of monthly trends of extremes daily temperatures, both minimum and maximum. Analysis was done for the period 2000–2013, based on freely available hourly temperature measurements from 60 Polish stations. Percentiles Tmin10 for minimum and Tmax90 for maximum daily temperature within each month were used as thresholds for selection of extreme temperature values. Count of days with extreme temperatures below/above threshold described every month. Significance of days count trend was analyzed with Mann–Kendall test at the significance level 0.05. For maximum temperatures, significant decreasing trend was found only for 3 station-months. For minimum temperature, 26 significant trends were found and presented in the form of map.

Evaluation of the possibility of the estimation of bare soil temperature on the basis of air temperature measurement

100%

Michalska B., Nidzgorska-Lencewicz J.

Acta Scientiarum Polonorum. Agricultura

2009

tom 08

nr 4

Basis of the study was made up of the results of automatic, hourly measurements of air temperature and bare soil temperature originating from the agrometeorological station in Lipnik (53°21’ N; 14°58’ E, 30 m AMSL) from the period of 2001-2005. Basing on the results of the linear regression analysis, relationships for particular months were determined between daily soil temperature at four depths and air temperature set in seven different combinations. It was stated that the highest possibilities of daily soil temperature prediction in profile to 50 cm are characteristic for the air temperature that is the average from 24 hourly measurements. Average absolute differences between the actual soil temperature and the one calculated from equations for this relation oscillate in the particular months between 1.3°C at the depth of 5 cm and 0.5°C at the depth of 50 cm. On average, the smallest differences apply to the warm half of the year and the depth of 50 cm. It was shown that significantly smaller possibilities of the estimation of daily soil temperature values are characteristic for daily air temperature amplitude.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Agricultura

1 Infrastruktura i Ekologia Terenów Wiejskich

1 Michalska B.

1 Nidzgorska-Lencewicz J.

1 Szczepanek R.

1 2014

1 2009

Wyniki wyszukiwania

Extreme daily air temperatures in Poland (2000-2013)

Evaluation of the possibility of the estimation of bare soil temperature on the basis of air temperature measurement