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The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP)
ABSTRACT Radiocarbon (14C) ages cannot provide absolutely dated chronologies for archaeological or paleoenvironmental studies directly but must be converted to calendar age equivalents using a…
Timing and climate forcing of volcanic eruptions for the past 2,500 years
It is shown that large eruptions in the tropics and high latitudes were primary drivers of interannual-to-decadal temperature variability in the Northern Hemisphere during the past 2,500 years and cooling was proportional to the magnitude of volcanic forcing.
Summer temperature variations in the European Alps, A.D. 755-2004
Abstract Annually resolved summer temperatures for the European Alps are described. The reconstruction covers the a.d. 755–2004 period and is based on 180 recent and historic larch [Larix decidua…
2500 Years of European Climate Variability and Human Susceptibility
Reconstruction of tree ring–based reconstructions of central European summer precipitation and temperature variability over the past 2500 years may provide a basis for counteracting the recent political and fiscal reluctance to mitigate projected climate change.
Cooling and societal change during the Late Antique Little Ice Age from 536 to around 660 AD
Societal upheaval occurred across Eurasia in the sixth and seventh centuries. Tree-ring reconstructions suggest a period of pronounced cooling during this time associated with several volcanic…
Long‐term drought severity variations in Morocco
- J. Esper, D. Frank, U. Büntgen, A. Verstege, J. Luterbacher, E. Xoplaki
- Environmental Science, Geography
- 1 September 2007
Cedrus atlantica ring width data are used to reconstruct long‐term changes in the Palmer Drought Severity Index (PDSI) over the past 953 years in Morocco, NW Africa. The reconstruction captures the…
Ensemble reconstruction constraints on the global carbon cycle sensitivity to climate
The coupling of a probabilistic approach with an ensemble of proxy-based temperature reconstructions and pre-industrial CO2 data from three ice cores provides robust constraints for γ on the policy-relevant multi-decadal to centennial timescales, and quantification of γ is not only improved, but also likelihoods can be assigned, thereby providing a benchmark for future model simulations.
Continental-scale temperature variability during the past two millennia
Past global climate changes had strong regional expression. To elucidate their spatio-temporal pattern, we reconstructed past temperatures for seven continental-scale regions during the past one to…
Orbital forcing of tree-ring data
Based on an analysis of maximum latewood density data from northern Scandinavia, along with published dendrochronological records, this study finds evidence that previous tree-ring-reliant…
Old World megadroughts and pluvials during the Common Era
Megadroughts reconstructed over north-central Europe in the 11th and mid-15th centuries reinforce other evidence from North America and Asia that droughts were more severe, extensive, and prolonged over Northern Hemisphere land areas before the 20th century, with an inadequate understanding of their causes.