Spring-summer hydroclimate reconstruction of the past millennium for the Czech Republic using oak standard chronology

Project identification: GA13-04291S

Investor: Czech Science Foundation

Programme / Project type: Standard projects

Project period
2013-2017

Applicant: Prof. RNDr. Petr Dobrovolný, CSc. (Department of Geography, Faculty of Science, Masaryk University, Brno)

Cooperating organizations:
Global Change Research Institute CAS
Mendel University in Brno

Abstract:
Climate variability in the pre-instrumental period can be estimated from different kinds of proxy data. Whereas most proxy reconstructions aimed to temperature, several recent studies proved that tree ring width (TRW) oak (Quercus sp.) chronologies can be moisture/drought sensitive. Standard Czech oak chronology reaching back to 352 AD will be substantially completed especially in periods with low number of replications. Additional sampling of recent, historical and subfossil woods will be done with respect to different geography and altitude. Simultaneously a set of hydro-climatic target parameters such as precipitation and drought indices will be prepared from long and homogeneous instrumental series. Consecutively TRW will be calibrated to hydroclimate parameters. A novel ensemble methodological approach will be applied for dendroclimatic reconstruction allowing exploration of complex interplay between TRW proxy and a set of target parameters. Moreover, this approach will allow better understanding uncertainty sources in proxy-target relations and defining uncertainty estimates.