A tree ring-based hydroclimate reconstruction for eastern Europe reveals large-scale teleconnection patterns

• Published in: Climate dynamics Vol. 59; no. 9-10; pp. 2979 - 2994
• Main Authors: Roibu, Cătălin-Constantin, Nagavciuc, Viorica, Ionita, Monica, Popa, Ionel, Horodnic, Sergiu-Andrei, Mursa, Andrei, Büntgen, Ulf
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2022; Springer; Springer Nature B.V
• Subjects: Alliances; Atlantic Ocean; Atmospheric circulation; Atmospheric circulation patterns; Beech; Biodiversity; Chronology; climate; Climate change; Climatology; Drought; dynamics; Earth and Environmental Science; Earth Sciences; Eastern European region; Environmental aspects; Evapotranspiration; Evapotranspiration-precipitation relationships; Fagus sylvatica; Forests; Geographical distribution; Geophysics/Geodesy; growth rings; High pressure; Hydroclimate; Low pressure; Moldova; Northern European region; Northern Hemisphere; Oceanography; Oceans; paleoclimatology; Precipitation; Precipitation (Meteorology); Pressure; R&D; Research & development; Romania; Sea surface; Sea surface temperature; Surface temperature; Teleconnection patterns; Teleconnections; Teleconnections (Climatology); Tree rings; Trees; Ukraine; Romania; United States > US; Eastern Europe; Europe; Atlantic Ocean; Moldova; Northern European region; Eastern European region; Ukraine; Climate reconstructions; Tree rings; Dendroclimatology; Eastern Europe; Beech; Drought extremes; Teleconnection patterns
• ISSN: 0930-7575; 1432-0894
• DOI: 10.1007/s00382-022-06255-8

We present a new beech ( Fagus sylvatica L.) tree-ring width composite chronology from five natural low-elevation forests in eastern Romania, which represent the species’ continental distribution limit. Our regional beech chronology reflects April–June hydroclimate variability in form of the Standardized Precipitation Evapotranspiration Index over large parts of Romania, Ukraine, and the Republic of Moldova, for which high-resolution paleoclimatic evidence is broadly missing. Most of the reconstructed hydroclimatic extremes back to 1768 CE are confirmed by documentary evidences, and a robust association is found with large-scale atmospheric circulation patterns in the Northern Hemisphere and sea surface temperatures over the North Atlantic. Reconstructed pluvials coincide with a high-pressure system over the North Atlantic Ocean and north-western Europe, and with a low-pressure system over south-western, central and eastern Europe, whereas historical droughts coincide with a high-pressure system over Europe and a low-pressure system over the central part of the Atlantic Ocean. Our study demonstrates the potential to produce well-replicated, multi-centennial beech chronologies for eastern Europe to reconstruct regional hydroclimate variation and better understand the causes and consequences of large-scale teleconnection patterns.