Stratification-induced variations in nutrient utilization in the Polar North Atlantic during past interglacials

- A thin mixed-layer and a strongly stratified upper-water characterized MIS 1.
- A thick mixed-layer prevailed during MIS 11 and reduced nitrate utilization.
- These contrasting results explain the weak expression of MIS 11 in the polar latitudes.
- Caution is needed when using older interglacials as near-future climate analogues.