Circumpolar Current: Speed & Depth Through the Ages

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The Antarctic Circumpolar Current (ACC) extends from the sea surface to depths of 2000-4000 meters and can reach widths of up to 2000 kilometers. Its speed has varied significantly over geological time, particularly during the Last Glacial Maximum (LGM), which occurred between 24,000 and 15,000 years ago, when all ocean currents, including the ACC, experienced severe disruptions. The specific reasons for these changes in speed and flow patterns during this period are complex and may not align with common expectations.
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How fast does the circumpolar current move and how much has its speed changed over the ages? Also, how deep is the current?
 
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You mean the Antarctic circumpolar current?

The ACC extends from the sea surface to depths of 2000-4000 m and can be as wide as 2000 km

We know that all ocean currents were severely disrupted during the "Last Glacial Maximum" (LGM) somewhere between 24,000 and 15,000 years ago, including the http://www.awi-bremerhaven.de/Publications/Mac2000a_abstract.html , however the explanation for that may be surprising.
 
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