Table 1 Observational data and calibrated radiocarbon ages.

ReferenceSite
name
LatitudeLongitudeMaterialMarker
depth (m)
Raw 14C
age
(years)
Raw
age
error
ΔRΔR
error
Calendar
year
(before
present)
1σ−
years
1σ+
years
Calibration
curve
Jakobsson
et al. (4)
4PC-172.8175.7Mollusc124.0710,2003025020010,900230510Marine13
Keigwin
et al. (5)
JPC0267.4165.6Elphidium
excavatum
53.45510,90014025020011,950350490Marine13
Hill and
Driscoll (6)
VBC03*70.7165.4Marine
bivalve
(Portlandia)
60.4211,50076525020012,5901120910Marine13
JPC1070.8165.5Marine
bivalve
59.210,2005525020010,910240250Marine13
Elias et al. (12)85-6970165.7Screened
peat
44.9511,000600012,8709080Intcal13
Dyke and Savelle (8)Bowhead whale bone10,210703205010,850140130Marine13
Dyke et al. (9)Macoma
balthica
11,4001003205012,60090110Marine13
England and Furze (7)Cyrtodaria
kurriana
12,3801103205013,520140130Marine13
England and Furze (7)C. kurriana12,170253205013,3206060Marine13
England and Furze (7)C. kurriana11,800703205012,960110121Marine13

*Portlandia arctica raw 14C age reflects correction (800 ± 700 years subtracted from published raw 14C age).