Irka Hajdas

Research topics

• Geology and Paleoclimatology Research · 4 papers
• Archaeology and ancient environmental studies · 2 papers
• Geological and Geochemical Analysis · 1 paper
• Pacific and Southeast Asian Studies · 1 paper
• Isotope Analysis in Ecology · 1 paper
• Marine and environmental studies · 1 paper

Frequent co-authors

• Bernd Kromer · 3 papers
• Paula J. Reimer · 2 papers
• Édouard Bard · 2 papers
• Alex Bayliss · 2 papers
• Paul G. Blackwell · 2 papers
• Christopher Bronk Ramsey · 2 papers
• Richard Lawrence Edwards · 2 papers
• Michael Friedrich · 2 papers

Papers

1. The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP)Radiocarbon · 2020 · 8,034 citations

   ABSTRACT Radiocarbon ( 14 C) ages cannot provide absolutely dated chronologies for archaeological or paleoenvironmental studies directly but must be converted to calendar age equivalents using a calibration curve compensating for fluctuations in atmospheric 14 C concentration. Although calibration curves…

2. IntCal09 and Marine09 Radiocarbon Age Calibration Curves, 0–50,000 Years cal BPRadiocarbon · 2009 · 4,348 citations

   The IntCal04 and Marine04 radiocarbon calibration curves have been updated from 12 cal kBP (cal kBP is here defined as thousands of calibrated years before AD 1950), and extended to 50 cal kBP, utilizing newly available data sets that meet…

3. Persistent Solar Influence on North Atlantic Climate During the HoloceneScience · 2001 · 3,525 citations

   Surface winds and surface ocean hydrography in the subpolar North Atlantic appear to have been influenced by variations in solar output through the entire Holocene. The evidence comes from a close correlation between inferred changes in production rates of the…

4. A Pervasive Millennial-Scale Cycle in North Atlantic Holocene and Glacial ClimatesScience · 1997 · 3,432 citations

   Evidence from North Atlantic deep sea cores reveals that abrupt shifts punctuated what is conventionally thought to have been a relatively stable Holocene climate. During each of these episodes, cool, ice-bearing waters from north of Iceland were advected as far…