Abrupt change of Antarctic moisture origin at the end of Termination II
Copyright policy )Abrupt change of Antarctic moisture origin at the end of Termination II
The deuterium excess of polar ice cores documents past changes in evaporation conditions and moisture origin. New data obtained from the European Project for Ice Coring in Antarctica Dome C East Antarctic ice core provide new insights on the sequence of events involved in Termination II, the transition between the penultimate glacial and interglacial periods. This termination is marked by a north–south seesaw behavior, with first a slow methane concentration rise associated with a strong Antarctic temperature warming and a slow deuterium excess rise. This first step is followed by an abrupt north Atlantic warming, an abrupt resumption of the East Asian summer monsoon, a sharp methane rise, and a CO2overshoot, which coincide within dating uncertainties with the end of Antarctic optimum. Here, we show that this second phase is marked by a very sharp Dome C centennial deuterium excess rise, revealing abrupt reorganization of atmospheric circulation in the southern Indian Ocean sector.
deuterium excess; water stable isotopes; deglaciations; bipolar seesaw; site temperature; source temperature; polar ice cores, Time Factors, 550, Paleoclimate, [SDU.STU.GM] Sciences of the Universe [physics]/Earth Sciences/Geomorphology, Glaciology, Climate, Greenland, atmospheric moisture, Westerlies, deuterium exce, Atlantic Ocean, Indian Ocean, deuterium, water stable isotope, seasonal variation, termination II, bipolar seesaw, methane, polar ice cores, article, Temperature, interglacial, climate change, priority journal, Seasons, Methane, Environmental Monitoring, warming, [SDU.STU.GM] Sciences of the Universe/Earth Sciences/Geomorphology, Climate Change, Antarctic Regions, site temperature, deglaciation, Meteorology and Climatology, paleoclimate, [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology, source temperature, [ SDU.STU.GM ] Sciences of the Universe [physics]/Earth Sciences/Geomorphology, Last interglacial, Ice, 500, carbon dioxide, Carbon Dioxide, Deuterium, Antarctica
deuterium excess; water stable isotopes; deglaciations; bipolar seesaw; site temperature; source temperature; polar ice cores, Time Factors, 550, Paleoclimate, [SDU.STU.GM] Sciences of the Universe [physics]/Earth Sciences/Geomorphology, Glaciology, Climate, Greenland, atmospheric moisture, Westerlies, deuterium exce, Atlantic Ocean, Indian Ocean, deuterium, water stable isotope, seasonal variation, termination II, bipolar seesaw, methane, polar ice cores, article, Temperature, interglacial, climate change, priority journal, Seasons, Methane, Environmental Monitoring, warming, [SDU.STU.GM] Sciences of the Universe/Earth Sciences/Geomorphology, Climate Change, Antarctic Regions, site temperature, deglaciation, Meteorology and Climatology, paleoclimate, [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology, source temperature, [ SDU.STU.GM ] Sciences of the Universe [physics]/Earth Sciences/Geomorphology, Last interglacial, Ice, 500, carbon dioxide, Carbon Dioxide, Deuterium, Antarctica
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