A5085026085- Tree-ring climate responses
- Plant Water Relations and Carbon Dynamics
- Geology and Paleoclimatology Research
- Climate variability and models
- Hydrology and Drought Analysis
- Hydrology and Sediment Transport Processes
- Maritime and Coastal Archaeology
- Archaeology and ancient environmental studies
- Cultural Heritage Materials Analysis
- Ecology and Vegetation Dynamics Studies
- Yersinia bacterium, plague, ectoparasites research
- Forest ecology and management
- Ancient and Medieval Archaeology Studies
German Meteorological Service
2021-2024
Johannes Gutenberg University Mainz
2017-2022
Justus-Liebig-Universität Gießen
2020-2022
Climate reconstructions for the Common Era are compromised by paucity of annually-resolved and absolutely-dated proxy records prior to medieval times. Where based on combinations different climate archive types (of varying spatiotemporal resolution, dating uncertainty, record length predictive skill), it is challenging estimate past amplitude ranges, disentangle relative roles natural anthropogenic forcing, or probe deeper interrelationships between variability human history. Here, we...
The jet stream is an important dynamic driver of climate variability in the Northern Hemisphere mid-latitudes
We present a June–July drought reconstruction based on the standardized precipitation index ( SPI ) for Balkan Peninsula over period 730–2015 CE . The is developed using composite Pinus heldreichii tree‐ring width chronology, from high‐elevation network of eight sites in Pindus Mountains northwest Greece, composed living trees and relict wood. dataset includes ring series Europe's currently oldest known tree, dendrochronologically dated to be more than 1075 years old. spatial coverage...
Proxy evidence is necessary to place current temperature and hydroclimatic changes in a long‐term context assess the full range of natural anthropogenic climate forcings. Here, we present first millennium‐length reconstruction late summer (August–September) variability for Mediterranean region. We compiled 132 maximum latewood density (MXD) tree‐ring series living relict Pinus heldreichii trees from network four high‐elevation sites Pindus Mountains Greece. Forty reach back into millennium...
Abstract. The new PAGES2k global compilation of temperature-sensitive proxies offers an unprecedented opportunity to study regional trends associated with orbitally driven changes in solar irradiance over the past 2 millennia. Here, we analyze pre-industrial long-term from 1 1800 CE across dataset and find that, contrast gradual cooling apparent ice core, marine, lake sediment data, tree rings do not exhibit same decline. To understand why tree-ring lack any evidence a significant cooling,...
Abstract The spatiotemporal variability of precipitation is vital importance to Mediterranean ecology and economy, but pre‐instrumental changes are not well understood. Here, we present a millennial‐length June–July reconstruction derived from network 22 Pinus heldreichii high‐elevation sites in the Pindus Mountains northwestern Greece. Tree‐ring width chronologies these cohere exceptionally over past several hundred years ( r 1467–2015 = 0.64) revealing coherence at inter‐annual centennial...
A steep decline in the quality and quantity of available climate proxy records before medieval times challenges any comparison reconstructed temperature hydroclimate trends extremes between first second half Common Era. Understanding physical causes, ecological responses societal consequences past climatic changes, however, demands highly-resolved, spatially-explicit, seasonally-defined absolutely-dated archives over entire period question. Continuous efforts to improve existing...
Europe experienced severe heat waves during the last decade, which impacted ecological and societal systems are likely to increase under projected global warming. A better understanding of pre-industrial warm-season changes is needed contextualize these recent trends extremes. Here, we introduce a network 352 living relict larch trees (
Abstract. The 692 proxy records of the new PAGES 2k compilation offer an unprecedented opportunity to study regional global temperature trends associated with orbitally-driven changes in solar irradiance over past two millennia. Here, we analyse significance long-term from 1–1800 CE compilation’s tree-ring, ice core, marine and lake sediment find, unlike ice-cores, glacier dynamics, sediments, no suggestion a pre-industrial cooling trend tree-ring records. To understand why proxies lack...
Fig. S1.Temporal distribution and resolution of the tree-ring (green), lake sediment (red), marine (orange) glacier ice (blue) proxy records from PAGES 2k 2.0.0 database.(Dashed) lines indicate ranging between subannual 145 years.
<p>The Mediterranean has been identified as particularly vulnerable to climate change, yet a high-resolution temperature reconstruction extending back into the Medieval Warm Period is still lacking. Here we present such record from high-elevation site on Mt. Smolikas in northern Greece, where some of Europe’s oldest trees provide evidence warm season variability 730 CE. The derived 192 annually resolved, latewood density series ancient living and relict Pinus...
<p><strong>A recent increase in mid-latitude extreme weather events has been linked to anomalies the position, strength, and waviness of Northern Hemisphere polar jet stream. The latitudinal position North Atlantic Jet (NAJ) particular drives climatic extremes over Europe, </strong>by controlling location storm track by influencing occurrence duration atmospheric blocking. <strong>To put NAJ trends a historical perspective investigate...
<p>Climate extremes over the mid-latitudes are driven by a combination of thermodynamical and dynamical factors. In Europe, primary driver summer climate is position jet stream Europe-North Atlantic (EU) region. certain configurations, EU creates dipole between northwestern southeastern Europe that can result in contrasting extreme weather conditions two regions. To study long-term variability configuration, as well its potential impact on past human systems, we have...
<p><strong>The jet stream configuration over the Atlantic Ocean and European </strong><strong>continent</strong><strong> substantially affects climatic extremes in Western Eurasia by transporting heat vorticity</strong><strong>. </strong><strong>However, how Europe-Atlantic varies it climate on long time-scales are still unclear. We compiled a network of...