A5086893844- Tree-ring climate responses
- Plant Water Relations and Carbon Dynamics
- Geology and Paleoclimatology Research
- Climate variability and models
- Forest ecology and management
- Ecology and Vegetation Dynamics Studies
- Archaeology and ancient environmental studies
- Horticultural and Viticultural Research
- Cryospheric studies and observations
- Climate change and permafrost
- Isotope Analysis in Ecology
- Hydrology and Drought Analysis
- Urban Heat Island Mitigation
- Species Distribution and Climate Change
- Fire effects on ecosystems
- Landslides and related hazards
- Botany and Plant Ecology Studies
- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Yersinia bacterium, plague, ectoparasites research
- Urban Green Space and Health
- Tree Root and Stability Studies
- Forest Insect Ecology and Management
- Pleistocene-Era Hominins and Archaeology
- Meteorological Phenomena and Simulations
Johannes Gutenberg University Mainz
2016-2025
Czech Academy of Sciences, Global Change Research Institute
2021-2025
Czech Academy of Sciences
2023
Czech University of Life Sciences Prague
2023
Justus-Liebig-Universität Gießen
2022
ARC Centre of Excellence for Core to Crust Fluid Systems
2021
Macquarie University
2021
University of Arizona
2019-2020
Institut de l'Information Scientifique et Technique
2019-2020
University of Bern
2008-2020
Preserving multicentennial climate variability in long tree-ring records is critically important for reconstructing the full range of temperature over past 1000 years. This allows putative “Medieval Warm Period” (MWP) to be described and compared with 20th-century warming modeling attribution studies. We demonstrate that carefully selected chronologies from 14 sites Northern Hemisphere (NH) extratropics can preserve such coherent large-scale, trends if proper methods analysis are used. In...
Variability of central European temperature and precipitation shows correlations with some major historical changes.
The Medieval Climate Anomaly (MCA) was the most recent pre-industrial era warm interval of European climate, yet its driving mechanisms remain uncertain. We present here a 947-year-long multidecadal North Atlantic Oscillation (NAO) reconstruction and find persistent positive NAO during MCA. Supplementary reconstructions based on climate model results proxy data indicate clear shift to weaker conditions into Little Ice Age (LIA). Globally distributed suggest that this is one aspect global...
Climate model projections suggest widespread drying in the Mediterranean Basin and wetting Fennoscandia coming decades largely as a consequence of greenhouse gas forcing climate. To place these other "Old World" climate into historical perspective based on more complete estimates natural hydroclimatic variability, we have developed World Drought Atlas" (OWDA), set year-to-year maps tree-ring reconstructed summer wetness dryness over Europe during Common Era. The OWDA matches accounts severe...
Abstract Annually resolved summer temperatures for the European Alps are described. The reconstruction covers a.d. 755–2004 period and is based on 180 recent historic larch [Larix decidua Mill.] density series. regional curve standardization method was applied to preserve interannual multicentennial variations in this high-elevation proxy dataset. Instrumental measurements from high- (low-) elevation grid boxes back 1818 (1760) reveal strongest growth response current-year June–September...
The spatial context is critical when assessing present-day climate anomalies, attributing them to potential forcings and making statements regarding their frequency severity in a long-term perspective. Recent international initiatives have expanded the number of high-quality proxy-records developed new statistical reconstruction methods. These advances allow more rigorous regional past temperature reconstructions and, turn, possibility evaluating models on policy-relevant, spatio-temporal...
High-resolution temperature and precipitation variations their seasonal extremes since 1500 are presented for the European Alps (43.25–48.25°N 4.25–16.25°E). The spatial resolution of gridded reconstruction is given by 0.5° × monthly (seasonal) grids reconstructed back to 1659 (1500–1658). reconstructions based on a combination long instrumental station data documentary proxy evidence applying principal component regression analysis. Annual, winter summer Alpine temperatures indicate...
Cedrus atlantica ring width data are used to reconstruct long‐term changes in the Palmer Drought Severity Index (PDSI) over past 953 years Morocco, NW Africa. The reconstruction captures dry conditions since 1980s well and places this extreme period within a millennium‐long context. PDSI values were above average for most of 1450–1980 period, which let recent drought appear exceptional. However, our results also indicate that pluvial episode millennium was preceded by generally drier back...
The 2007 European larch (Larix decidua Mill.) growing season was monitored along two elevational transects in the Lötschental valley Swiss Alps. Phenological observations and weekly microcore sampling of 28 trees were conducted between April October at seven study sites regularly spaced from 1350 to 2150 m a.s.l. on northwest- southeast-facing slopes. developmental stages nearly 75,000 individual cells assessed 1200 thin sections used investigate links trees’ thermal regimes growth phases...
Considerable evidence exists that current global temperatures are higher than at any time during the past millennium. However, long-term impacts of rising and associated shifts in hydrological cycle on productivity ecosystems remain poorly understood for mid to high northern latitudes. Here, we quantify species-specific spatiotemporal variability terrestrial aboveground biomass stem growth across Canada's boreal forests from 1950 present. We use 873 newly developed tree-ring chronologies...
Abstract The growth of past, present, and future forests was, is will be affected by climate variability. This multifaceted relationship has been assessed in several regional studies, but spatially resolved, large-scale analyses are largely missing so far. Here we estimate recent changes 5800 beech trees ( Fagus sylvatica L.) from 324 sites, representing the full geographic climatic range species. Future trends were predicted considering state-of-the-art scenarios. validated models indicate...
Abstract Annually resolved and millennium‐long reconstructions of large‐scale temperature variability are primarily composed tree ring width (TRW) chronologies. Changes in width, however, have recently been shown to bias the ratio between low‐ high‐frequency signals. To overcome limitations capturing full spectrum past variability, we present a network 15 maximum latewood density (MXD) chronologies distributed across Northern Hemisphere extratropics. Independent subsets continental‐scale...
Ranking among the largest volcanic eruptions of Common Era (CE), 'Millennium Eruption' Changbaishan produced a widely-dispersed tephra layer (known as B-Tm ash), which represents an important tie point for palaeoenvironmental studies in East Asia. Hitherto, there has been no consensus on its age, with estimates spanning at least tenth century CE. Here, we identify cosmogenic radiocarbon signal 775 CE subfossil larch engulfed and killed by pyroclastic currents emplaced during initial...
Asian summer monsoon (ASM) variability and its long-term ecological societal impacts extending back to Neolithic times are poorly understood due a lack of high-resolution climate proxy data. Here, we present precisely dated well-calibrated tree-ring stable isotope chronology from the Tibetan Plateau with 1- 5-y resolution that reflects high- low-frequency ASM 4680 BCE 2011 CE. Superimposed on persistent drying trend since mid-Holocene, rapid decrease in moisture availability between ∼2000...