Supplementary Data for: Worldwide consequences of a mid-Holocene cold event in the Nordic Seas

SupplementaryTable1.xlsx lists all the samples used to calculate the regional reservoir correction.

SupplementaryTable2.xlsx lists all information on the individual radiocarbon dates of all the cores used in the study: LabID, Depth [cm], 14C age ± error, Calibrated age (95% confidence range and mean), and Dated species. Please note that the age-depth relationships have been modeled using a Bayesian approach so the Calibrated ages might differ from the ages that would be yielded by the calibration of individual radiocarbon ages.

SupplementaryTable3.xlsx contains all the data used in the study:

OCE2017-GR02:
- Depth [cm] 
- Age [ka BP] (this study)
- N. pachyderma [%] (Telesiński et al. 2022)
- summer sSST 100m [°C] (this study)

MSM5-5-723:
- Depth [cm]
- Age [ka BP] (this study)
- N. pachyderma [%] (Werner et al. 2015)
- summer sSST 100m [°C] (this study)
- P_BIP₂₅ (Werner et al. 2015)
- Planktic foraminifera fragmentation [%] (Werner et al. 2003)

JM10-330GC:
- Depth [cm]
- Age [ka BP] (this study)
- N. pachyderma [%] (Consolaro et al. 2018)
- summer sSST 100m [°C] (this study)
- Planktic foraminifera [ind./g] (Consolaro et al. 2018)

MSM5-5-712:
- Depth [cm]
- Age [ka BP] (this study)
- N. pachyderma [%] (Werner et al. 2013)
- summer sSST 100m [°C] (this study)
- IRD flux [#/cm**2/kyr] (Werner et al. 2013, recalculated to the new age model)
- P_BIP₂₅ (Müller et al. 2012)

M23258:
- Depth [cm]
- Age [ka BP] (this study)
- N. pachyderma [%] (Sarnthein et al. 2003)
- summer sSST 100m [°C] (this study)
- annual SST [°C] (Martrat et al. 2003)

M17730-4
- Depth [cm]
- Age [ka BP] (this study)
- N. pachyderma [%] (Telesiński et al. 2015)
- summer sSST 100m [°C] (this study)
- Planktic foraminifera [ind./g] (Telesiński et al. 2015)

MD95-2011
- Depth [cm]
- Age [ka BP] (this study)
- N. pachyderma [%] (Risebrobakken et al. 2003)
- summer sSST 100m [°C] (this study)
- Planktic foraminifera [ind./g] (Risebrobakken et al. 2003)

MD99-2284
- Depth [cm]
- Age [ka BP] (this study)
- N. pachyderma [%] (Bakke et al. 2009, Eldevik et al. 2014)
- summer sSST 100m [°C] (this study)

JM09-020
- Depth [cm]
- Age [ka BP] (this study)
- annual SST [°C] (Łącka et al. 2019)

SupplementaryFigure1.pdf shows Age-depth relationships of cores used in the study as modeled using a Bayesian approach with the Bacon software (Blaauw and Christen, 2011). Dark shading indicates the more likely ages for a given depth, the grey dashed line indicates the 95% confidence range, and the red dashed line indicates the best-fit (mean) age model.

SupplementaryFigure2.pdf shows Sea-ice concentration in (A) 6.83-6.85 ka BP and (B) 7.63-7.65 ka BP in the TraCE-21ka. Subsurface (92 m) temperature in (C) 6.81-6.83 ka BP and (D) 7.63-7.65 ka BP in the TraCE-21ka.