Extreme droughts and human responses to them: the Czech Lands in the pre-instrumental period
| Autor: | Miroslav Trnka, Ladislava Řezníčková, Oldřich Kotyza, Lukáš Dolák, Rudolf Brázdil, Petr Dobrovolný |
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| Rok vydání: | 2019 |
| Předmět: |
Return period
Czech 010506 paleontology Index (economics) 010504 meteorology & atmospheric sciences lcsh:Environmental protection Stratigraphy 0208 environmental biotechnology 02 engineering and technology 01 natural sciences lcsh:Environmental pollution Evapotranspiration lcsh:TD169-171.8 Precipitation lcsh:Environmental sciences 0105 earth and related environmental sciences lcsh:GE1-350 2. Zero hunger Global and Planetary Change Paleontology 15. Life on land language.human_language 020801 environmental engineering Documentary evidence Geography 13. Climate action lcsh:TD172-193.5 language Period (geology) Physical geography Precipitation index |
| Zdroj: | Climate of the Past, Vol 15, Pp 1-24 (2019) |
| ISSN: | 1814-9332 |
| Popis: | The Czech Lands are particularly rich in documentary sources that help elucidate droughts in the pre-instrumental period (12th–18th centuries), together with descriptions of human responses to them. Although droughts appear less frequently before 1501, the documentary evidence has enabled the creation of a series of seasonal and summer half-year drought indices (Standardized Precipitation Index, SPI; Standardized Precipitation Evapotranspiration Index, SPEI; Z index) for the Czech Lands for the 1501–2017 period. Based on the calculation of return period for series of drought indices, extreme droughts were selected for inclusion herein if all three indices indicated a return period of ≥20 years. For further analysis, only those from the pre-instrumental period (before 1804) were used. The extreme droughts selected are characterized by significantly lower values of drought indices, higher temperatures and lower precipitation totals compared to other years. The sea-level pressure patterns typically associated with extreme droughts include significantly higher pressure over Europe and significantly lower pressure over parts of the Atlantic Ocean. Extreme droughts with a return period ≥ 50 years are described in detail on the basis of Czech documentary evidence. A number of selected extreme droughts are reflected in other central European reconstructions derived from documentary data or tree rings. Impacts on social life and responses to extreme droughts are summarized; analysis of fluctuations in grain prices with respect to drought receives particular attention. Finally, extreme droughts from the pre-instrumental and instrumental periods are discussed. |
| Databáze: | OpenAIRE |
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