Fig. 7. Phase diagrams (A) without, and (B,C) with regional splitting. (A) prin1 and prin2, (B1) prin2west and prin3west, (B2) prin1west and prin4west, (B3) prin2west and prin4west, (C1) prin1east and prin4east and (C2) prin2east and prin4east. Bubble size is directly proportional to the NUUK ATA. Years indicated by two digits. '…west' and '…east' indicate regional splitting.