What question did this study set out to answer?

The primary aim is to evaluate the performance of the MIROC6-iso model in simulating isotopic variations related to climate interactions.

February 2, 2026Open Access

Improved response of δ18Osw in the Pacific Ocean to atmosphere-ocean interaction and ENSO using the isotope-enabled Fully Coupled Model MIROC6-iso

Key Points

The primary aim is to evaluate the performance of the MIROC6-iso model in simulating isotopic variations related to climate interactions.
Introduced a fully coupled isotopic version of MIROC6 (MIROC6-iso).
Assessed isotopic variations in precipitation, water vapor, and ocean water with observational data.
Evaluated relationships of δ¹⁸O with temperature and salinity.
MIROC6-iso accurately reproduces spatial isotopic variations in key oceanic and atmospheric elements.
The model effectively demonstrates the connections between δ¹⁸O and environmental variables like temperature and salinity.

Abstract

This study introduces the fully coupled isotopic version of the Model for Interdisciplinary Research on Climate version 6 (MIROC6-iso). MIROC6-iso exhibits good performance in reproducing spatial isotopic variations in precipitation, water vapor, and ocean water, and the relationships of δ¹⁸O with temperature and salinity against observations. This study shows that MIROC6-iso is useful to reconstruct past climate changes and examine the recent changes in the water cycle. We plan to extend this work by adding more datasets (such as pre-industrial and mid-Holocene simulations) and including additional variables.If you’d like any of the data or the source code, please feel free to email the authors. we’d be happy to share.

Improved response of δ18Osw in the Pacific Ocean to atmosphere-ocean interaction and ENSO using the isotope-enabled Fully Coupled Model MIROC6-iso

Key Points

Abstract

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