38 research outputs found
Chronology and possible links between climatic and cultural change during the first millennium BC in southern Siberia and Central Asia
Chronology and possible links between climatic and cultural change during the first millennium BC in southern Siberia and Central Asia
Reply to S Riehl and K Pustovoytov (Journal of Archaeological Science 33 (2006) 143-144)
We appreciate the interest of Simone Riehl and Konstantin Pustovoytov (hereafter R&P) in our publication and here we answer their critical remarks and questions. R&P criticise two aspects: (1) our interpretation of the pollen record from Kutuzhekovo Lake and (2) the information we derived from the St. Petersburg radiocarbon database. We discuss the questions and we show that these do not really affect our earlier conclusions.
Chronology and possible links between climatic and cultural change during the first millennium BC in southern Siberia and Central Asia
Tracking the Atlantic Multidecadal Oscillation through the last 8,000 years
Understanding the internal ocean variability and its influence on climate is imperative for society. A key aspect concerns the enigmatic Atlantic Multidecadal Oscillation (AMO), a feature defined by a 60- to 90-year variability in North Atlantic sea-surface temperatures. The nature and origin of the AMO is uncertain, and it remains unknown whether it represents a persistent periodic driver in the climate system, or merely a transient feature. Here, we show that distinct, âź55- to 70-year oscillations characterized the North Atlantic ocean-atmosphere variability over the past 8,000 years. We test and reject the hypothesis that this climate oscillation was directly forced by periodic changes in solar activity. We therefore conjecture that a quasi-persistent âź55- to 70-year AMO, linked to internal ocean-atmosphere variability, existed during large parts of the Holocene. Our analyses further suggest that the coupling from the AMO to regional climate conditions was modulated by orbitally induced shifts in large-scale ocean-atmosphere circulation