Data from a modelling study to investigate North Atlantic sea surface temperature at the Eocene-Oligocene Transition

David Hutchinson, Agatha de Boer

This dataset accompanies a study that investigates the evolution of North Atlantic sea surface temperature (SST) across the Eocene-Oligocene Transition (EOT) about 34 million years ago. The associated study is foremost a paleoclimate SST proxy study, but has a modelling component that investigates the impact of atmospheric carbon dioxide concentration and Arctic paleogeography on the circulation and SST at the time.

The modelling component consists of four simulations with an EOT paleogeography. The sensitivity experiments have respectively the following defining characteristics: (1) Open Arctic-Atlantic connection with 800 ppm CO₂ concentration, (2) Closed Arctic-Atlantic connection with 800 ppm CO₂ concentration, (3) Open Arctic-Atlantic connection with 400 ppm CO₂ concentration, (4) Closed Arctic-Atlantic connection with 400 ppm CO₂ concentration.

Citation

David Hutchinson, Agatha de Boer (2022) Data from a modelling study to investigate North Atlantic sea surface temperature at the Eocene-Oligocene Transition. Dataset version 1. Bolin Centre Database. https://doi.org/10.17043/hutchinson-2022-eocene-oligocene-1

References

Śliwińska KK, Coxall HK, Hutchinson DK, Liebrand D, Schouten S, de Boer AM (2022) Sea surface temperature evolution of the North Atlantic Ocean across the Eocene-Oligocene Transition. Clim Past Discuss. [preprint]. https://doi.org/10.5194/cp-2021-184

Data description

The data correspond to the four simulations presented in the study by Śliwińska et al. (2022) and are provided in netCDF (.nc) files.

The dataset contains the following subfolders:

• MOC_indices: Meridional overturning circulation indices, as shown in Figure 5a,b.
• N_Atlantic_SST: Time series of N. Atlantic SST evolution as shown in Figure 5c.
• SST_annual: Annual mean SST shown in Figure 6 and Figure 7.
• SST_month: Monthly mean SST, used to calculate summer SST shown in Figure S4.
• streamfunction: Barotropic streamfunction, as shown in Figure 8
• model_proxy_points: Pointwise version of the nearest model data points to each proxy location.

The data files in each subfolder are named using the following suffixes, corresponding to the four simulation experiments:

• arc_cl_400: Arctic Closed, 400 ppm CO₂
• arc_cl_800: Arctic Closed, 800 ppm CO₂
• arc_op_400: Arctic Open, 400 ppm CO₂
• arc_op_800: Arctic Open, 800 ppm CO₂

The data for the pointwise version of the nearest model data points are presented in one comma-separated values (.csv) file.

Total file size (compressed): ~7.7 MB.