The expression of climate in the Weddell Sea region in comparison to the rest of Antarctica for events in the last glacial period

The Skytrain Ice Rise ice core adds to the handful of climate records from Antarctica that cover the whole of the last glacial period (here, we consider ~100-10 ka bp). By our count 7 records have been published covering the entire period and a further 6 cover a substantial part of it. Using the synchroneity of signals across the continent (for example in components of dust and in methane) we can tie the records together temporally. The precision of such ties is good enough to allow comparison of the timing and shape of particular events across the continent.

Many of the differences between sites will derive from local changes of elevation that certainly occur at ice rise sites. We first will discuss the glacial water isotope record from Skytrain Ice Rise (in comparison to other sites) in this context.  This will supplement the work we have already done on the Holocene and the last interglacial period using the Skytrain Ice Rise core.

However we primarily focus on a number of events such as the Antarctic Cold Reversal and some of the large Antarctic Isotopic Maxima (eg AIM 12).  We will present records from the different sectors of Antarctica. We will investigate whether any sectors of Antarctica led in such events, and determine the relative amplitude of such events around the continent. This information will offer diagnostic tests to ideas about the causes and process of millennial scale variability across the glacial period.