Paleoclimatology Paleoclimatology The Blytt-Sernander classification, or sequence, is a series of north European climatic periods or phases based on the study of Danish peat bogs by Axel Blytt (1876) and Rutger Sernander (1908). The classification was incorporated into a sequence of pollen zones later defined by Lennart von Post. ...more on Wikipedia about "Blytt-Sernander"
The Older Dryas was a somewhat variable cold, dry Blytt-Sernander period of North Europe, roughly equivalent to Pollen zone 1c. It is named after an indicator genus, Dryas, which flourished during the penultimate stadial of the Pleistocene. The Older Dryas period was preceded by the Bølling and followed by the Allerød periods. ...more on Wikipedia about "Older Dryas"
The Oldest Dryas is a climatic period, which occurred during the coldest stadial after the Weichselian glaciation in north Europe. In the Alps, the oldest Dryas corresponds to the Gschnitz stadial of the Wurm glaciation. The three “Dryas” periods (younger, older, oldest) are named for a marker species, Dryas octopetala, detected in core samples of glacial ice and peat bogs. The oldest Dryas corresponds to Pollen zone 1a. ...more on Wikipedia about "Oldest Dryas"
Oxygen isotope ratio cycles are cyclical variations in the ratio of the mass of oxygen with an atomic weight of 18 to the mass of oxygen with an atomic weight of 16 present in calcite of the oceanic floor as determined by core samples. The ratio is linked to water temperature of ancient oceans, which in turn reflects ancient climates. Cycles in the ratio mirror climate changes in geologic history. ...more on Wikipedia about "Oxygen isotope ratio cycle"
A paleoclimatologist is a person who studies climates of the past and past climate changes. ...more on Wikipedia about "Paleoclimatologist"
Paleoclimatology is the study of climate change taken on the scale of the entire history of the earth. ...more on Wikipedia about "Paleoclimatology"
Pollen zones are a system of subdividing late Pleistocene and early Holocene paleoclimate using the data from pollen cores. The sequence provides a global chronological structure to a wide variety of scientists, such as geologists, climatologisists, geographists and archaeologists, who study the physical and cultural environment of the last 15,000 years. ...more on Wikipedia about "Pollen zone"
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