Table 1.
Dating for events V1 to V7 relative to depth and dating scales applied to the Greenland and Antarctic records (Fig. 1). Ages in brackets are based on linear interpolation between volcanic age markers on the WDC timescale, or based on extrapolation of the 14-year time transfer suggested by (7). *There was no archived ice left across the V2 event in GRIP at this depth. Blanks indicate ‘not present’. Exact tephra depths in GISP2, GRIP, and NGRIP are provided in Table S3 (Supplementary Material). Source attributions are banded as follows: NHhigh = 60° to 90°N, NHext = 30° to 60°N, tropical = 30°S to 30°N, and SHext = 30° to 90°S
| V1 | V2 | V3 | V4 | V5 | V6 | V7 | Refs. | |
|---|---|---|---|---|---|---|---|---|
| GISP2 depth (m) | 778.82 | 774.52 | – | 766.88 | 762.94 | _ | 759.07 | (31) |
| GRIP depth (m) | 740.56 | 736.47* | 733.55 | 729.51 | 725.47 | – | – | (32) |
| NGRIP1 depth (m) | 644.86 | 641.02 | 638.17 | 634.7 | 630.99 | – | 627.67 | (27) |
| WDC depth (m) | 850.73 | 845.08 | 841.38 | – | – | 828.56 | – | (34,35) |
| EDML depth (m) | 272.3 | 270.72 | 269.61 | – | – | 265.78 | – | (36) |
| Age (BCE)Meese | 1695 | 1670 | – | 1624 | 1600 | – | 1577 | (48) |
| Age (BCE)GICC05 | 1667 | 1641 | 1624 | 1599 | 1574 | – | 1552 | (47,60) |
| Age (BCE)WD2014 | 1656 | 1629 | 1612 | (1584) | (1562) | 1551 | (1538) | (34) |
| Age (BCE)IntCal13 | 1647 | 1622 | 1605 | 1580 | 1555 | NaN | 1532 | (49) |
| Age (BCE)MB19 | 1653 | 1627 | (1610) | (1586) | (1561) | – | (1538) | (7) |
| Age (BCE) | 1654 | 1628 | 1611 | 1586 | 1561 | 1551 | 1538 | This study |
| Source attribution | Tropical/ NHext | Aniakchak NHext | Tropical/ NHext/SHext | NHhigh | NHext | SHext | NHext |