气候变化领域集成服务门户(CCPortal): Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes

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DOI	10.5194/cp-15-827-2019
	Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes
	Mikšovský J.; Brázdil R.; Trnka M.; Pišoft P.
发表日期	2019
ISSN	18149324
起始页码	827
结束页码	847
卷号	15 期号:2
英文摘要	While a considerable number of records document the temporal variability of droughts for central Europe, the understanding of its underlying causes remains limited. In this contribution, time series of three drought indices (Standardized Precipitation Index - SPI; Standardized Precipitation Evapotranspiration Index - SPEI; Palmer Drought Severity Index - PDSI) are analyzed with regard to mid- to long-term drought variability in the Czech Lands and its potential links to external forcings and internal climate variability modes over the 1501-2006 period. Employing instrumental and proxy-based data characterizing the external climate forcings (solar and volcanic activity, greenhouse gases) in parallel with series representing the activity of selected climate variability modes (El Niño-Southern Oscillation - ENSO; Atlantic Multidecadal Oscillation - AMO; Pacific Decadal Oscillation - PDO; North Atlantic Oscillation - NAO), regression and wavelet analyses were deployed to identify and quantify the temporal variability patterns of drought indices and similarity between individual signals. Aside from a strong connection to the NAO, temperatures in the AMO and (particularly) PDO regions were disclosed as one of the possible drivers of inter-decadal variability in the Czech drought regime. Colder and wetter episodes were found to coincide with increased volcanic activity, especially in summer, while no clear signature of solar activity was found. In addition to identification of the links themselves, their temporal stability and structure of their shared periodicities were investigated. The oscillations at periods of approximately 60-100 years were found to be potentially relevant in establishing the teleconnections affecting the long-term variability of central European droughts. © Author(s) 2019.
语种	英语
scopus关键词	Atlantic Multidecadal Oscillation; climate forcing; climate oscillation; climate variation; drought; El Nino-Southern Oscillation; evapotranspiration; index method; instrumentation; long-term change; North Atlantic Oscillation; Pacific Decadal Oscillation; solar activity; temporal variation; time series analysis; Czech Republic
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146822
作者单位	Department of Atmospheric Physics, Charles University, Prague, Czech Republic; Institute of Geography, Masaryk University, Brno, Czech Republic; Institute of Agrosystems and Bioclimatology, Mendel University, Brno, Czech Republic; Global Change Research Institute, Czech Academy of Sciences, Brno, Czech Republic
推荐引用方式 GB/T 7714	Mikšovský J.,Brázdil R.,Trnka M.,et al. Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes[J],2019,15(2).
APA	Mikšovský J.,Brázdil R.,Trnka M.,&Pišoft P..(2019).Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes.Climate of the Past,15(2).
MLA	Mikšovský J.,et al."Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes".Climate of the Past 15.2(2019).