An Arctic perspective on dating Mid-Late Pleistocene environmental history

摘要: To better understand Pleistocene climatic changes in the Arctic, integrated palaeoenvironmental and palaeoclimatic signals from a variety of marine terrestrial geological records as well geochronologic age control are required, not least for correlation to extra-Arctic records. In this paper we discuss, an Arctic perspective, methods tools that commonly used date events. We review state art geochronology, with focus on factors affect possibility quality dating, support overview by examples application modern dating sequences. Event stratigraphy numerical ages important correlate fragmented establish regional stratigraphic schemes. Age is provided radiocarbon, luminescence or cosmogenic exposure ages. Ocean deep-sea sediment successions can be correlated over large distances based geochemical physical property proxies composition, patterns palaeomagnetic and, increasingly, biostratigraphic data. Many these reveal cyclical provide basis astronomical tuning. Recent advances technology, calibration modelling allow measuring smaller quantities material more precisely previously undatable (i.e. foraminifera C-14, single-grain luminescence). However, much there still limits resolution most methods. Consequently improving accuracy precision (analytical uncertainty) through technological understanding processes tasks future. Another challenge integrate records, which could aided targeting continental shelf lake exploring occur both settings, creating joint research networks promote collaboration between geologists modellers.