The relationship between Be-10 and geomagnetic field strength records in central North Atlantic sediments during the last 80 ka

A profile of leached Be-10/Be-9 has been measured in an 80 ka sediment core from the northeast Atlantic Ocean. This profile shows a significant inverse correlation with the palaeomagnetic intensity profile inferred from NRM/ARM measurements in the same core, particularly between similar to 40 and 50 ka, where a rapid decrease in field intensity is accompanied by a rapid increase in Be-10/Be-9. The extent to which this increase in Be-10/Be-9 at similar to 40 ka is associated with a Be-10 ''peak'' seen in polar ice cores at about the same time, remains speculative.