Marek Kejna
Articles
Poland’s Climate Extremes Index, 1951–2005
Geographia Polonica (2007) vol. 80, iss. 2, pp. 47-58 | 
Full text
Abstract
The paper seeks to synthesise contemporary (1951–2005) trends regarding the occurrenceof extreme meteorological events in Poland using the complex Climate Extremes Index(CEI) proposed by Karl et al. (1996). Poland’s CEI Was the greatest in the 1990s. The trendnoted for it in the period from 1951 to 2005 is an upward one, but does not achieve statisticalsignificance. Similar tendencies for the index have been observed in the 20th century for the USA(1910–90), the Russian Federation (1950–96), and Central Europe (1951–2000).
Keywords: climate extremes index (CEI), temperature, precipitation, moisture index, Poland.
, Department of Climatology, Nicolaus Copernicus University, Gagarina 9, 87-100 Toruń, Poland
, Department of Climatology, Nicolaus Copernicus University, Gagarina 9, 87-100 Toruń, Poland
[marek.kejna@umk.pl]
, Department of Climatology, Nicolaus Copernicus University, Gagarina 9, 87-100 Toruń, Poland
, Department of Climatology, Nicolaus Copernicus University, Gagarina 9, 87-100 Toruń, Poland
Geographia Polonica (2007) vol. 80, iss. 2, pp. 59-68 | Full text
Abstract
The paper presents the variability to Global Solar Radiation (GSR) in Central Europein the period 1951–2005. The basic material comprises the data from the NCEP/NCAR reanalysisof 35 grid points. The research shows a statistically significant increase in GSR income in theentire study period in the research area. This increase, which started in the late 1980s, was alsoobserved across Europe as a whole. One of the reasons for this change might be the decrease inpollutant emissions to the atmosphere. Moreover, an upward trend in the numbers of days withGSR over the 90th percentile is to be observed in the study period, while the number of days withGSR lower than the 10th percentile shows a negative trend. In both cases, the recorded trendsare statistically significant at the 0.05 level.
Keywords: global solar radiation, Central Europe, NCEP/NCAR reanalysis data
, Department of Climatology, Nicolaus Copernicus University, Gagarina 9, 87-100 Toruń, Poland
, Department of Climatology, Nicolaus Copernicus University, Gagarina 9, 87-100 Toruń, Poland
, Department of Climatology, Nicolaus Copernicus University, Gagarina 9, 87-100 Toruń, Poland
[marek.kejna@umk.pl]
, Department of Climatology, Nicolaus Copernicus University, Gagarina 9, 87-100 Toruń, Poland
Geographia Polonica (2007) vol. 80, iss. 2, pp. 69-78 | Full text
Abstract
The paper presents the results of research on variability of wind speed in CentralEurope between 1951 and 2005. According to NCEP/NCAR reanalysis data from 35 grids, CentralEurope has witnessed increases in mean wind speed as well as in the number of days withstrong wind, both statistically significant. This attests to the fact that the number of extremephenomena connected with high wind velocities has increased recently.
Keywords: wind speed, NCEP/NCAR reanalysis, Central Europe.
, Department of Climatology, Nicolaus Copernicus University, Gagarina 9, 87-100 Toruń, Poland
, Department of Climatology, Nicolaus Copernicus University, Gagarina 9, 87-100 Toruń, Poland
[marek.kejna@umk.pl]
, Department of Climatology, Nicolaus Copernicus University, Gagarina 9, 87-100 Toruń, Poland
, Department of Climatology, Nicolaus Copernicus University, Gagarina 9, 87-100 Toruń, Poland