2006
Long-term trends in strong winds in the Czech Republic
DOBROVOLNÝ, Petr a Rudolf BRÁZDILZákladní údaje
Originální název
Long-term trends in strong winds in the Czech Republic
Název česky
Dolohodobé trendy ve výsyktu silných větrů v České republice
Autoři
DOBROVOLNÝ, Petr (203 Česká republika, garant) a Rudolf BRÁZDIL (203 Česká republika)
Vydání
Vienna, Geophysical Research Abstracts, EGU General Assembly, Vol. 8, s. 1-1, 2006
Nakladatel
European Geophysical Union
Další údaje
Jazyk
angličtina
Typ výsledku
Stať ve sborníku
Obor
10500 1.5. Earth and related environmental sciences
Stát vydavatele
Rakousko
Utajení
není předmětem státního či obchodního tajemství
Kód RIV
RIV/00216224:14310/06:00029016
Organizační jednotka
Přírodovědecká fakulta
ISSN
Klíčová slova anglicky
strong winds; instrumental measurements; documentary evidence; long term trends; Czech Republic
Štítky
Příznaky
Mezinárodní význam
Změněno: 9. 4. 2010 11:27, prof. RNDr. Petr Dobrovolný, CSc.
V originále
Wind measurements (speeds and gusts) on meteorological stations are biased by different factors complicating to develop homogeneous long-term series. Statistical analysis of wind gusts in 1961 to 1990 is presented. Strong winds are divided on windstorms related to large horizontal pressure gradients and strong winds connected with convection (squall, tornado, downburst). Using PCA of mean sea level pressure field types of winter windstorms are analysed for the 20th century. Long term series of strong winds from the 16th century are produced using information from documentary evidence (narrative sources, visual daily weather observations, newspapers etc.). Trends in strong winds are analysed with respect to circulation characteristics (NAOI, CEZI) and winter temperatures in Central Europe. Climatology of tornadoes is presented with respect to their seasonality, spatial distribution, impacts and intensity according to Fujita scale. Higher frequency of strong winds appears in the late 16th and in the early 17th centuries. It corresponds with the common deterioration of the Central European climate. On the other hand, the lower number of recorded events during the 1940s and 1950s is connected with the quality of data excerpted mostly from newspapers for this period. Documentary evidence allows identify the most disastrous historical windstorms and provides valuable information on impacts to nature and society. In such a way information of historical climatology complement data from the instrumental period and help to define the role of anthropogenic factor in present global climate change.
Česky
Wind measurements (speeds and gusts) on meteorological stations are biased by different factors complicating to develop homogeneous long-term series. Statistical analysis of wind gusts in 1961 to 1990 is presented. Strong winds are divided on windstorms related to large horizontal pressure gradients and strong winds connected with convection (squall, tornado, downburst). Using PCA of mean sea level pressure field types of winter windstorms are analysed for the 20th century. Long term series of strong winds from the 16th century are produced using information from documentary evidence (narrative sources, visual daily weather observations, newspapers etc.). Trends in strong winds are analysed with respect to circulation characteristics (NAOI, CEZI) and winter temperatures in Central Europe. Climatology of tornadoes is presented with respect to their seasonality, spatial distribution, impacts and intensity according to Fujita scale. Higher frequency of strong winds appears in the late 16th and in the early 17th centuries. It corresponds with the common deterioration of the Central European climate. On the other hand, the lower number of recorded events during the 1940s and 1950s is connected with the quality of data excerpted mostly from newspapers for this period. Documentary evidence allows identify the most disastrous historical windstorms and provides valuable information on impacts to nature and society. In such a way information of historical climatology complement data from the instrumental period and help to define the role of anthropogenic factor in present global climate change.
Návaznosti
| GA205/01/1067, projekt VaV |
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