The seasonal teleconnections of the Indian Ocean Dipole to the North Atlantic region ...

• Main Authors: Hempel, Tim, Weisheimer, Antje, Palmer, Tim
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Indian; North Atlantic
• Online Access: https://dx.doi.org/10.57757/iugg23-0442; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016002

<!--!introduction!--> The Indian Ocean Dipole (IOD) is a major source of seasonal climate variability. This dipole has strong impacts on the Indian Ocean region and through teleconnections can influence the seasonal climate of remote regions. The strong IOD of 2019/2020 influenced the state and predictability of the Northern Hemisphere extratropics. Thus, a good understanding of the mechanism of this teleconnection is desirable. In this contribution we investigate the special teleconnection of the winter 2019/2020. In model experiments with the OpenIFS from ECMWF we show that the NAO in the winter 2019/2020 is influenced by the IOD. We use hindcast ensembles of the DJF season 2019/2020 to analyse this teleconnection. In model experiments, the Sea Surface Temperature (SST) boundary conditions are perturbed. With these experiments we identify the relative importance of individual ocean regions to the state of the NAO in the winter of 2019/2020. We contrast the experiments to the operational ECMWF System5 ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...