Articles | Volume 21, issue 5
https://doi.org/10.5194/os-21-2149-2025
https://doi.org/10.5194/os-21-2149-2025
Research article
 | 
01 Oct 2025
Research article |  | 01 Oct 2025

Assessment of ocean bottom pressure variations in CMIP6 HighResMIP simulations

Le Liu, Michael Schindelegger, Lara Börger, Judith Foth, and Junyang Gou

Data sets

Monthly ocean bottom pressure anomalies 1980-2014 and 2030-2049 from CMIP6 HighResMIP models Le Liu et al. https://doi.org/10.5281/zenodo.14886818

SeDA-OBP: Global ocean bottom pressure anomaly fields with a spatial resolution of 0.25 degrees from self-supervised data assimilation Junyang Gou et al. https://doi.org/10.3929/ethz-b-000686843

EC-Earth-Consortium EC-Earth3P model output prepared for CMIP6 HighResMIP EC-Earth Consortium (EC-Earth) https://doi.org/10.22033/ESGF/CMIP6.2322

ECCO Ocean Bottom Pressure - Monthly Mean 0.5 Degree (Version 4 Release 4 B) ECCO Consortium et al. https://doi.org/10.5067/ECG5M-OBP4B

ECMWF ECMWF-IFS-LR model output prepared for CMIP6 HighResMIP Christopher David Roberts et al. https://doi.org/10.22033/ESGF/CMIP6.2463

MOHC HadGEM3-GC31-MM model output prepared for CMIP6 HighResMIP highres-future Malcolm Roberts https://doi.org/10.22033/ESGF/CMIP6.5989

CSR GRACE and GRACE-FO RL06 Mascon Solutions v02 Himanshu Save https://doi.org/10.15781/cgq9-nh24

CMCC CMCC-CM2-VHR4 model output prepared for CMIP6 HighResMIP Enrico Scoccimarro et al. https://doi.org/10.22033/ESGF/CMIP6.1367

CNRM-CERFACS CNRM-CM6-1 model output prepared for CMIP6 CMIP Aurore Voldoire https://doi.org/10.22033/ESGF/CMIP6.1375

JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height CRI Filtered RL06.3Mv04 D. N. Wiese et al. https://doi.org/10.5067/TEMSC-3JC634

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Short summary
As seawater is moved about by the different types of ocean flow, the pressure at the ocean bottom changes with time and location. We show that such bottom pressure variations are represented reasonably well by high-resolution climate models and that in some regions, like the Arctic Ocean, the intensity of the pressure fluctuations will likely increase under global warming. These insights are useful for the design of future satellite missions that will track mass variations in the Earth system.
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