R EPORTS Indian Ocean Climate and an Absolute Chronology over Dansgaard/Oeschger Events 9 to 13

• Main Authors: Stephen J. Burns, Dominik Fleitmann, Albert Matter, Abdulkarim A. Al-subbary
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Greenland; Indian; Dansgaard-Oeschger events; Greenland ice cores
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.211.1496; http://www.geo.umass.edu/climate/papers/burnsetalscience2003.pdf

Oxygen-isotope ratios of a stalagmite from Socotra Island in the Indian Ocean provide a record of changes in monsoon precipitation and climate for the time period from 42 to 55 thousand years before the present. The pattern of precipitation bears a striking resemblance to the oxygen-isotope record from Greenland ice cores, with increased tropical precipitation associated with warm periods in the high northern latitudes. The largest change, at the onset of interstadial 12, occurred very rapidly, in about 25 years. The chronology of the events found in our record requires a reevaluation of previously published time scales for climate events during this period. The climate of the last glacial period is marked by large, rapid variations in climate termed Dansgaard/Oeschger (D/O) events. First identified in the oxygen-isotope values of ice cores from Greenland (1, 2, 3) and interpreted as indicating large temperature variations, correlative