Pre-instrumental summer precipitation variability in northwestern Greece from a high-elevation Pinus heldreichii network

0542486 - ÚVGZ 2022 RIV GB eng J - Článek v odborném periodiku
Esper, J. - Konter, O. - Klippel, L. - Krusic, P. J. - Büntgen, Ulf
Pre-instrumental summer precipitation variability in northwestern Greece from a high-elevation Pinus heldreichii network.
International Journal of Climatology. Roč. 41, č. 4 (2021), s. 2828-2839. ISSN 0899-8418. E-ISSN 1097-0088
Výzkumná infrastruktura: CzeCOS III - 90123
Institucionální podpora: RVO:86652079
Klíčová slova: may-june precipitation * tree-ring width * temperature reconstructions * drought reconstruction * climate reconstruction * northern-hemisphere * northeastern spain * large-scale * dendroclimatology * signals * climate reconstruction * Mediterranean * Pindus Mountains * pine * tree-rings * Valia Calda
Obor OECD: Climatic research
Impakt faktor: 3.651, rok: 2021
Způsob publikování: Open access
https://rmets.onlinelibrary.wiley.com/doi/10.1002/joc.6992

The spatiotemporal variability of precipitation is of vital importance to Mediterranean ecology and economy, but pre-instrumental changes are not well understood. Here, we present a millennial-length June-July precipitation reconstruction derived from a network of 22 Pinus heldreichii high-elevation sites in the Pindus Mountains of northwestern Greece. Tree-ring width chronologies from these sites cohere exceptionally well over the past several hundred years (r(1467-2015) = 0.64) revealing coherence at inter-annual to centennial timescales across the network. The network mean calibrates significantly against instrumental June-July precipitation over the past 40 years (r(1976-2015) = 0.71), even though no high-elevation observational record is available representing the moist conditions at the treeline above 1,900 m a.s.l. For the final reconstruction, the instrumental target data are adjusted to provide realistic estimates of high-elevation summer rainfall back to 729 CE. The reconstruction contains substantially more low-frequency variability than other high-resolution hydroclimate records from the eastern Mediterranean including extended dry periods from 1,350 to 1,379 CE (39 +/- 4.5 mm) and 913 to 942 (40 +/- 8.4 mm), and moist periods from 862 to 891 (86 +/- 11 mm) and 1,522 to 1,551 (80 +/- 3.5 mm), relative to the long-term mean of 61 mm. The most recent 30-year period from 1986 to 2015 is characterized by above average June-July precipitation (73 +/- 2 mm). Low-frequency changes in summer precipitation are likely related to variations in the position and persistence of storm tracks steering local depressions and causing extensive rainfall (or lack thereof) in high-elevation environments of the Pindus Mountains.
Trvalý link: http://hdl.handle.net/11104/0319888