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| rdf:type
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| Description
| - We analyze the characteristics of spatial evolution of the standardized precipitation evapotranspiration index (SPEI) at various time scales during the growing period (April-September) in the Czech Republic. The SPEI was calculated from monthly records of mean temperature and precipitation sums at 184 stations for the period 1961-2010. Using various lags, 1, 3, 6, 12, and 24 months, the drought at these time scales is relevant for agricultural, hydrological, and socio-economic impacts. The principal modes of variability of the SPEI calculated at these time scales were identified by using the empirical orthogonal functions (EOF) analysis. The explained variance of the leading EOF ranges between 71 and 61% as the time scale for calculating the SPEI increases from 1 to 24 months. The explained variance of EOF2 and EOF3 ranges between 5 and 9%, and 4 and 6%, respectively, as the SPEI is calculated for 1-24 months. With a few exceptions in the highest altitudes, the spatial coefficients of the EOF1 for all SPEI time scales have the same sign over the country's territory. Based on the spatial distribution of the spatial coefficients of EOF2 and EOF3, at all SPEI time scales, three climatically homogenous regions corresponding to the altitudes (<400 m, 401-700 m, >700 m) were identified. The regions reflect different land use types corresponding to: (i) mostly intensive agriculture, (ii) less intensive agriculture, and (iii) limited agricultural production and mostly forested. The frequency distribution of the SPEI values in 7 classes of drought category were calculated for each region. The normal conditions represent around 65% out of the total values of SPEI for all time scales in all regions. Moderate drought and moderate wet conditions are almost equally distributed around 10.5%. As the SPEI time scale increases, the difference between the percentages of extremely dry and extremely wet conditions changes on average from 0.2% (SPEI 1-month) to 4% (SPEI 24-month).
- We analyze the characteristics of spatial evolution of the standardized precipitation evapotranspiration index (SPEI) at various time scales during the growing period (April-September) in the Czech Republic. The SPEI was calculated from monthly records of mean temperature and precipitation sums at 184 stations for the period 1961-2010. Using various lags, 1, 3, 6, 12, and 24 months, the drought at these time scales is relevant for agricultural, hydrological, and socio-economic impacts. The principal modes of variability of the SPEI calculated at these time scales were identified by using the empirical orthogonal functions (EOF) analysis. The explained variance of the leading EOF ranges between 71 and 61% as the time scale for calculating the SPEI increases from 1 to 24 months. The explained variance of EOF2 and EOF3 ranges between 5 and 9%, and 4 and 6%, respectively, as the SPEI is calculated for 1-24 months. With a few exceptions in the highest altitudes, the spatial coefficients of the EOF1 for all SPEI time scales have the same sign over the country's territory. Based on the spatial distribution of the spatial coefficients of EOF2 and EOF3, at all SPEI time scales, three climatically homogenous regions corresponding to the altitudes (<400 m, 401-700 m, >700 m) were identified. The regions reflect different land use types corresponding to: (i) mostly intensive agriculture, (ii) less intensive agriculture, and (iii) limited agricultural production and mostly forested. The frequency distribution of the SPEI values in 7 classes of drought category were calculated for each region. The normal conditions represent around 65% out of the total values of SPEI for all time scales in all regions. Moderate drought and moderate wet conditions are almost equally distributed around 10.5%. As the SPEI time scale increases, the difference between the percentages of extremely dry and extremely wet conditions changes on average from 0.2% (SPEI 1-month) to 4% (SPEI 24-month). (en)
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| Title
| - Spatial and temporal evolution of drought conditions at various time scales in the Czech Republic during growing period
- Spatial and temporal evolution of drought conditions at various time scales in the Czech Republic during growing period (en)
|
| skos:prefLabel
| - Spatial and temporal evolution of drought conditions at various time scales in the Czech Republic during growing period
- Spatial and temporal evolution of drought conditions at various time scales in the Czech Republic during growing period (en)
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| skos:notation
| - RIV/67179843:_____/12:00388746!RIV13-AV0-67179843
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| http://linked.open...avai/riv/aktivita
| |
| http://linked.open...avai/riv/aktivity
| - I, P(ED1.1.00/02.0073), P(OC10010), Z(MSM6046070901)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
| |
| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/67179843:_____/12:00388746
|
| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - standardized precipitation evapotranspiration index; frequency distribution; empirical orthogonal function; Czech Republic (en)
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| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
| |
| http://linked.open...ontrolniKodProRIV
| |
| http://linked.open...i/riv/nazevZdroje
| - Idöjárás. Quarterly journal of the Hungarian meteorological society
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...v/svazekPeriodika
| |
| http://linked.open...iv/tvurceVysledku
| - Možný, M.
- Štěpánek, Petr
- Skalák, Petr
- Boroneant, C.
- Potop, V.
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| http://linked.open...ain/vavai/riv/wos
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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