GLOBAL CORRELATION OF EVENTS SURROUNDING TERMINATION II USING U-TH DATED STALAGMITE RECORDS FROM HULU AND DONGGE CAVES, CHINA
Based upon our correlations, we demonstrate that most of the marine oxygen isotope termination, along with the rise in atmospheric CO2, CH4, and Antarctic temperature, occurs within the WMI, suggesting that the initial phase of deglaciation proceeded while the monsoon was still weak and presumably Greenland was still cold. A similar sequence of events is also seen at Termination I. During the first deglacial phase (initial sea level, CO2, CH4, and Antarctic temperature rise), much of the northern hemisphere was dry, which may have starved the ice sheets of moisture. This effect, combined with CO2 rise and glacial isostatic processes, may have contributed to sea level to rise prior to the monsoon terminations and high northern latitude warming. The second deglacial phase (final CH4 rise, abrupt monsoon strengthening, and Greenland temperature rise) then took place after northern hemisphere insolation began to rise. We conclude that some combination of northern and southern insolation conditions is necessary for forcing glacial terminations, and that this process is much more complex than originally envisioned by Milankovitch.