The temperature sensitivity along elevational gradients is more stable in maximum latewood density than tree-ring width

0557708 - ÚVGZ 2023 RIV IT eng J - Článek v odborném periodiku
Hartl, C. - Schneider, L. - Riechelmann, D. F. C. - Kuhl, E. - Kochbeck, M. - Klippel, L. - Büntgen, Ulf - Esper, Jan
The temperature sensitivity along elevational gradients is more stable in maximum latewood density than tree-ring width.
Dendrochronologia. Roč. 73, JUN (2022), č. článku 125958. ISSN 1125-7865. E-ISSN 1612-0051
Grant CEP: GA MŠMT(CZ) EF16_019/0000797
Výzkumná infrastruktura: CzeCOS III - 90123
Institucionální podpora: RVO:86652079
Klíčová slova: climate-change * norway spruce * growth * reconstructions * outbreaks * weather * Abiotic site factors * European Alps * Climate sensitivity * Dendroecology * Dendroclimatology * European larch
Obor OECD: Forestry
Impakt faktor: 3, rok: 2022
Způsob publikování: Open access
https://www.sciencedirect.com/science/article/pii/S1125786522000388?via%3Dihub

Tree ring-based temperature reconstructions are preferably derived from maximum latewood density (MXD) compared to tree-ring width (TRW). Although temperature signals in MXD are less dependent on site ecology, systematic analyses of the effects of elevation and slope aspect on ring formation are still lacking. Here, we assess the climate sensitivity of MXD and TRW chronologies from six larch (Larix decidua Mill.) sites across the Simplon valley in the southwestern Swiss Alps, representing elevations from 1400 to 2150 m asl on both north-and south facing slopes. We find decreasing temperature signals with decreasing elevation in MXD and TRW, though correlation coefficients are generally higher for MXD and on the warmer and dryer south exposed slopes. While the greatest temperature signals are found for MJJA at highest elevations with r = 0.71 for MXD and r = 0.57 for TRW (both p < 0.05 and for the 1928-2009 common period), MXD still correlates significantly positive at the lowest elevation site that is ~750 m below the treeline. Our findings indicate the suitability of MXD over TRW for temperature reconstructions when using historical wood sources of unknown origin.
Trvalý link: http://hdl.handle.net/11104/0331622