Notes towards an optimal sampling strategy in dendroclimatology

0495449 - ÚVGZ 2019 RIV IT eng J - Článek v odborném periodiku
Kirdyanov, A. V. - Piermattei, A. - Kolář, Tomáš - Rybníček, Michal - Krusic, P. J. - Nikolaev, A. N. - Reining, F. - Büntgen, Ulf
Notes towards an optimal sampling strategy in dendroclimatology.
Dendrochronologia. Roč. 52, oct (2018), s. 162-166. ISSN 1125-7865. E-ISSN 1612-0051
Grant CEP: GA ČR(CZ) GA17-22102S; GA ČR(CZ) GA18-17295S
Institucionální podpora: RVO:86652079
Klíčová slova: Sampling design * Disc samples * Increment cores * Climate signal * Northeastern Siberia * Locally absent rings
Obor OECD: Meteorology and atmospheric sciences
Impakt faktor: 2.281, rok: 2018

Though the extraction of increment cores is common practice in tree-ring research, there is no standard for the
number of samples per tree, or trees per site needed to accurately describe the common growth pattern of a
discrete population of trees over space and time. Tree-ring chronologies composed of living, subfossil and archaeological
material often combine an uneven distribution of increment cores and disc samples. The effects of
taking one or two cores per tree, or even the inclusion of multiple radii measurements from entire discs, on
chronology development and quality remain unreported. Here, we present four new larch (Larix cajanderi Mayr)
ring width chronologies from the same 20 trees in northeastern Siberia that have been independently developed
using different combinations of core and disc samples. Our experiment reveals: i) sawing is much faster than
coring, with the latter not always hitting the pith, ii) the disc-based chronology contains fewer locally absent
rings, extends further back in time and exhibits more growth coherency, iii) although the sampling design has
little impact on the overall chronology behaviour, lower frequency information is more robustly obtained from
the disc measurements that also tend to reflect a slightly stronger temperature signal. In quantifying the influence
of sampling strategy on the quality of tree-ring width chronologies, and their suitability for climate
reconstructions, this study provides useful insights for optimizing fieldwork campaigns, as well as for developing
composite chronologies from different wood sources.
Trvalý link: http://hdl.handle.net/11104/0288425