This is a past event
Please join us for a seminar given by Max Torbenson, a visiting PhD student from the University of Arkansas, who will be speaking on ‘Asynchrony between Holocene chronologies? Evidence from Northern Irish bogs'.
Abstract
The two most important time keepers for the Holocene are the Greenland Ice Core Chronology (GICC05) and the radiocarbon calibration curve (IntCal). Greenland ice core data form the backbone in long-term temperature reconstructions for the Northern Hemisphere. Radiocarbon dating is used extensively to date other paleoclimate proxies and is often the only method of age estimation available for terrestrial records. Recently, a number of studies have suggested a temporal offset between GICC05 and IntCal. Tree-ring dated subfossil pines from bogs in Northern Ireland record a substantial recruitment episode around 8160 BP, interpreted as a hydroclimatic response to the 8.2 ka event. The timing of pine establishment is significantly more recent than the GICC05 age range for the 8.2 ka event, and suggests a minimum of 39 yr asynchrony between the chronologies at the time of the event.