Indication of Extreme Weather Events on the Wood Anatomy of Oak Trees (Quercus Robur L.) From the Central European Russia

Abstract

Cases of the development of narrow latewood were studied in the tree rings of oaks from the flood plain forests (south part of Tver region). Data were divided into four grades according to the tree age in the year of narrow latewood formation: less then 50, from 50 to 100, from 100 to 150 and more then 150 years. Analysis of fraction of trees with narrow latewood was conducted separately for all trees as well as for different age classes. Climatic factors, which affect the fraction of trees with narrow latewood were specified with Generalized Linear Model (GLM). The best model fit connected the fraction of trees with narrow latewood (age class from 50 to 100 years) to hydrological conditions of previous summer and temperature of previous autumn, winter and spring as well as a magnitude of spring flood. High fraction of trees with narrow latewood (more then 0.6) indicates years with combinations of extreme weather events in winter and spring.

Keywords

• Quercus robur L.
• dendrochronology
• climate
• extreme weather events
• Quercus robur L.
• Central European Russia