Climate of the Past
Climate of the Past
CP
Articles | Volume 22, issue 6
Articles | Volume 22, issue 6
https://doi.org/10.5194/cp-22-1223-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-22-1223-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 6
Research article
 | 
22 Jun 2026
Research article |  | 22 Jun 2026

The Marine Isotopic Stage 7: a relic of the “41 ka world”? Perspectives from a global-scale sea-surface temperature synthesis

Etienne Legrain, Nathan Stevenard, Emilie Capron, Frédéric Parrenin, and Natalia Vazquez Riveiros

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Short summary
To better understand climate drivers during a warm period ~200,000 years ago, we reconstructed global surface temperature using 132 marine records placed on a common timeline. We found strong hemispheric differences and showed that the warmest phase occurred despite lower CO2 levels. In addition, we suggest that extreme orbital forcing temporarily shifted the climate into the older 41,000-year rhythm, resulting in a hybrid warm period shaped by both 100,000-year and 41,000-year climate dynamics.
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