Remarkably high blue ring occurrence in Estonian Scots pines in 1976 reveals wood anatomical evidence of extreme autumnal cooling

Greaves, C.; Crivellaro, A.; Piermattei, A.; Krusic, P. J.; Oppenheimer, C.; Potapov, A.; Hordo, M.; Metslaid, S.; Kask, R.; Kangur, A.; Büntgen, Ulf

doi:https://dx.doi.org/10.1007/s00468-022-02366-1

Number of the records: 1

Remarkably high blue ring occurrence in Estonian Scots pines in 1976 reveals wood anatomical evidence of extreme autumnal cooling

1.

SYSNO ASEP	0572173
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Remarkably high blue ring occurrence in Estonian Scots pines in 1976 reveals wood anatomical evidence of extreme autumnal cooling
Author(s)	Greaves, C. (GB) Crivellaro, A. (GB) Piermattei, A. (GB) Krusic, P. J. (SE) Oppenheimer, C. (GB) Potapov, A. (EE) Hordo, M. (EE) Metslaid, S. (EE) Kask, R. (EE) Kangur, A. (EE) Büntgen, Ulf (UEK-B)_{RID, ORCID, SAI}
Source Title	Trees: structure and function. - : Springer - ISSN 0931-1890 Roč. 37, č. 2 (2023), s. 511-522
Number of pages	12 s.
Language	eng - English
Country	DE - Germany
Keywords	Climate change ; Dendrochronology ; Europe ; Lignification ; Pinus sylvestris ; Temperature reconstruction ; Wood anatomy
Subject RIV	EH - Ecology, Behaviour
OECD category	Forestry
R&D Projects	EF16_019/0000797 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Research Infrastructure	CzeCOS IV - 90248 - Ústav výzkumu globální změny AV ČR, v. v. i.
Method of publishing	Open access
Institutional support	UEK-B - RVO:86652079
UT WOS	000886451400001
EID SCOPUS	85142213582
DOI	10.1007/s00468-022-02366-1
Annotation	Key message An exceptionally high number of blue rings were formed within and between Scots pine trees from Estonia in 1976: a year that is well known for its outstanding summer heatwave over Western Europe, but its extreme autumnal cooling over Eastern Europe has so far been neglected in scientific literature. 'Blue rings' (BRs) are visual indicators of less lignified cell walls typically formed towards the end of a tree's growing season. Though BRs have been associated with ephemeral surface cooling, often following large volcanic eruptions, the intensity of cold spells necessary to produce BRs, as well as the consistency of their formation within and between trees still remains uncertain. Here, we report an exceptionally high BR occurrence within and between Scots pine (Pinus sylvestris L.) trees at two sites in Estonia, including the first published whole-stem analysis for BRs. Daily meteorological measurements from a nearby station allowed us to investigate the role temperature has played in BR formation since the beginning of the twentieth century. The single year in which BRs were consistently formed within and amongst most trees was 1976. While the summer of 1976 is well known for an exceptional heatwave in Northwest Europe, mean September and October temperatures were remarkably low over Eastern Europe, and 3.8 degrees C below the 1961-1990 mean at our sites. Our findings contribute to a better eco-physiological interpretation of BRs, and further demonstrate their ability to reveal ephemeral cooling not captured by dendrochronological ring width and latewood density measurements.
Workplace	Global Change Research Institute
Contact	Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268
Year of Publishing	2024
Electronic address	https://link.springer.com/article/10.1007/s00468-022-02366-1

Number of the records: 1