UVic earth system climate model data generated under MIS3 boundary conditions ...

• Main Authors: Saini, Himadri, Meissner, Katrin J., Kvale, Karin, Menviel, Laurie
• Format: Dataset
• Language: English
• Published: Dryad 2023
• Subjects: FOS Earth and related environmental sciences; Heinrich stadiums; Atlantic Meridional Overturning Circulation; Marine ecosystems; iron fertilisation; Antarctic; Southern Ocean; Antarc*; ice core
• Online Access: https://dx.doi.org/10.5061/dryad.k3j9kd5dt; https://datadryad.org/stash/dataset/doi:10.5061/dryad.k3j9kd5dt

The modelling dataset presented here corresponds to the study entitled "Transient response of Southern Ocean ecosystems during Heinrich stadials". Antarctic ice core records suggest that atmospheric CO2 increased by 15 to 20 ppm during Heinrich stadials (HS). These periods of abrupt CO2 increase are associated with a significant weakening of the Atlantic meridional overturning circulation (AMOC), and a warming at high southern latitudes. As such, modelling studies have explored the link between changes in AMOC, high southern latitude climate and atmospheric CO2. While proxy records suggest that the aeolian iron input to the Southern Ocean decreased significantly during HS, the potential impact on CO2 of reduced iron input combined with oceanic circulation changes has not been studied in detail. Here, we quantify the respective and combined impacts of reduced iron fertilisation and AMOC weakening on CO2 by performing numerical experiments with an Earth system model under boundary conditions representing ... : The data is generated through modelling simulations using the University of Victoria Earth system climate model. ...