A5016013354- Tree-ring climate responses
- Plant Water Relations and Carbon Dynamics
- Geology and Paleoclimatology Research
- Forest ecology and management
- Archaeology and ancient environmental studies
- Pleistocene-Era Hominins and Archaeology
- Ecology and Vegetation Dynamics Studies
- Climate change and permafrost
- Cultural Heritage Materials Analysis
- Species Distribution and Climate Change
- Climate variability and models
- Geomagnetism and Paleomagnetism Studies
- Landslides and related hazards
- Astro and Planetary Science
- Forest Ecology and Biodiversity Studies
- Plant and animal studies
- Genetic and phenotypic traits in livestock
- Mycorrhizal Fungi and Plant Interactions
- Remote Sensing and Land Use
- Omental and Epiploic Conditions
- Ancient and Medieval Archaeology Studies
- Tree Root and Stability Studies
- Lichen and fungal ecology
- Geological formations and processes
- Mediterranean and Iberian flora and fauna
Swiss Federal Institute for Forest, Snow and Landscape Research
2015-2025
University of Bern
2012-2025
Oeschger Centre for Climate Change Research
2012-2025
University of Helsinki
2023
University of Cambridge
2020
University of Arizona
2017
Institut de l'Information Scientifique et Technique
2017
New York University Press
2017
Weizmann Institute of Science
2017
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...
Quantitative wood anatomy (QWA), which involves measuring cell anatomical characteristics commonly on dated tree rings, is becoming increasingly important within plant sciences and ecology. This approach particularly valuable for studies that require processing a large number of samples, such as those aimed at millennial-long climatic reconstructions. However, the field faces significant challenges, including absence publicly available comprehensive protocol efficiently uniformly producing...
The long-term history of Zeiraphera diniana Gn. (the larch budmoth, LBM) outbreaks was reconstructed from tree rings host subalpine in the European Alps. This record derived 47 513 maximum latewood density measurements, and highlights impact contemporary climate change on ecological disturbance regimes. With over 1000 generations represented, this is longest annually resolved herbivore population dynamics, our analysis demonstrates that remarkably regular LBM fluctuations persisted past 1173...
Abstract X‐ray microdensitometry on annually resolved tree‐ring samples has gained an exceptional position in last‐millennium paleoclimatology through the maximum latewood density (MXD) parameter, but also increasingly other parameters. For 50 years, based measurement techniques have been de facto standard. However, studies report offsets mean levels for MXD measurements derived from different laboratories, indicating challenges of accuracy and precision. Moreover, reflected visible...
Summary The effects of climate change on Arctic ecosystems can range between various spatiotemporal scales and may include shifts in population distribution, community composition, plant phenology, primary productivity species biodiversity. growth rates age structure tundra vegetation as well its response to temperature variation, however, remain poorly understood because high‐resolution data are limited space time. Anatomical morphological stem characteristics were recorded assess the...
The most frequently and successfully used tree-ring parameters for the study of temperature variations are ring width maximum latewood density (MXD). MXD is preferred over due to a more prominent association with temperature. In this we explore dendroclimate potential dendroanatomy based on first truly well replicated dataset. Twenty-nine mature living Pinus sylvestris trees were sampled in North-eastern Finland at cool moist boreal forest zone, close latitudinal tree line, where width,...
Abstract The Sun sporadically produces eruptive events leading to intense fluxes of solar energetic particles (SEPs) that dramatically disrupt the near-Earth radiation environment. Such have been directly studied for last decades but little is known about occurrence and magnitude rare, extreme SEP events. Presently, a few produced measurable signals in cosmogenic radionuclides such as 14 C, 10 Be 36 Cl found. Analyzing annual C concentrations tree-rings from Switzerland, Germany, Ireland,...
Dendroecological research uses information stored in tree rings to understand how single trees and even entire forest ecosystems responded environmental changes finally reconstruct such changes. This is done by analyzing growth variations back time correlating various plant-specific parameters (for example) temperature records. Integrating wood anatomical these analyses would strengthen reconstructions, down intra-annual resolution. We therefore present a protocol on sample, prepare, analyze...
The sudden interruption of recurring larch budmoth (LBM; Zeiraphera diniana or griseana Gn.) outbreaks across the European Alps after 1982 was surprising, because populations had regularly oscillated every 8-9 years for past 1200 more. Although ecophysiological evidence limited and underlying processes remained uncertain, climate change has been indicated as a possible driver this disruption. An unexpected, recent return LBM population peaks in 2017 2018 provides insight into insect's...
ABSTRACT Advances in accelerator mass spectrometry have resulted an unprecedented amount of new high-precision radiocarbon ( 14 C) -dates, some which will redefine the international C calibration curves (IntCal and SHCal). Often these datasets are unaccompanied by detailed quality insurances place at laboratory, questioning whether structure is real, a result laboratory variation or measurement-scatter. A handful intercomparison studies attempt to elucidate offsets but may fail identify...
Tree rings dominate millennium-long temperature reconstructions and many records originate from Scandinavia, an area for which the relative roles of external forcing internal variation on climatic changes are, however, not yet fully understood. Here we compile 1,179 series maximum latewood density measurements 25 conifer sites in northern establish a suite 36 subset chronologies, analyse their climate signal. A new reconstruction 1483–2006 period correlates at 0.80 with June–August...
Supplementing broader-scale dendroecological approaches with high-resolution wood anatomical analyses constitutes a useful technique to assess spatiotemporal patterns of climate-induced growth responses in circumpolar tundra vegetation. A systematic evaluation dendrochronological and features arctic dwarf shrubs is, however, still missing. Here, we report on nearly thousand samples from ten major shrub species that were collected at 30 plot-sites around 70°N 22°W coastal East Greenland....
Abstract Annually resolved and absolutely dated tree-ring chronologies are the most important proxy archives to reconstruct climate variability over centuries millennia. However, suitability of reflect “true” spectral properties past changes in temperature hydroclimate has recently been debated. At issue is accurate quantification differences between early nineteenth-century cooling recent warming. In this regard, central Europe (CEU) offers unique opportunity compare evidence from...
The TreeNet research and monitoring network has been continuously collecting data from point dendrometers air soil microclimate using an automated system since 2011. goal of is to generate high temporal resolution datasets tree growth water dynamics for provide near real-time indicators forest performance drought stress a wide audience. This paper explains the key working steps installation sensors in field acquisition, transmission, processing, online visualization. Moreover, we discuss...
The longest absolute tree-ring chronology is extended by the Swiss Late Glacial back to about 14 000 BP (years before 1950) with an uncertainty of only 8 years (2-sig, Reinig 2020). Recently published chronologies from Southern France (Bard et al. 2023) extend throughout Older Dryas further 350 BP. However, accurate placement mid-resolution (1yr ever 3yr) French radiocarbon so far not available and purely base on low-resolution measurements.By performing stable isotope (δ18O...
Abstract Tree rings are crucial for reconstructing past climates, with maximum latewood density (MXD) as a key metric. However, wood integrity is critical accurate MXD‐based reconstructions, raising concerns when using potentially degraded relict wood. Quantitative anatomy (QWA) provides morphometric alternative. We compared X‐ray and QWA‐derived measurements from recent five‐millennia‐old Siberia's Yamal region. measured bulk holo‐cellulose‐to‐wood ratio employed spectroscopic analyses to...
Despite an increasing demand for Burgundy truffles (Tuber aestivum), gaps remain in our understanding of the fungus' overall lifecycle and ecology. Here, we compile evidence from three independent surveys Hungary Switzerland. First, measured weight maturity 2,656 T. aestivum fruit bodies a three-day harvest August 2014 highly productive orchard Hungary. All specimens ranging between 2 755 g were almost evenly distributed through five maturation classes. Then, another 4,795 harvested on four...