Micro-site specific growth deviations and climate sensitivity of a Fennoscandian pine tree-ring network
Abstract
The boreal forest represents an important archive for climate reconstructions over the past centuries to millennia. In this ecosystem tree growth is primarily controlled by summer temperatures and sub-fossil trees are preserved in shallow lakes, allowing a prolongation of living tree chronologies up to millennial scale. It is known that micro-environmental growth conditions of the underlying samples should be homogenous when compiling such chronologies. The influence of changing micro-site conditions on tree-ring width (TRW) chronologies was, however, not yet systematically investigated on a larger spatial scale. Here we present a comprehensive Pinus sylvestris tree-ring width network covering the entire Fennoscandia. At 20 locations, we sampled trees at locally moist and dry sites, resulting in 40 micro-site chronologies. Considering the networks' wide geographical range and the connected climatic gradients (latitudinal temperature gradients and longitudinal luv-lee effects of the Scandinavian Mountains) our study aims at: i) Evaluating larger scale inter-site relationships of the micro-site network, ii) analyzing micro-site specific growth performance and iii) micro-site specific climate sensitivity over space and time. Our findings will help to estimate the importance of considering potential micro-site effects within larger scale tree-ring networks that might eventually help to improve the development of climate reconstructions from this annually resolved archive.
- Publication:
-
EGU General Assembly Conference Abstracts
- Pub Date:
- April 2018
- Bibcode:
- 2018EGUGA..20.8483H