Climate of the Past
Climate of the Past
CP
Articles | Volume 20, issue 6
Articles | Volume 20, issue 6
https://doi.org/10.5194/cp-20-1283-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-20-1283-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 6
Research article
 | 
12 Jun 2024
Research article |  | 12 Jun 2024

Eccentricity forcing on tropical ocean seasonality

Luc Beaufort and Anta-Clarisse Sarr

Data sets

Response to Sea Surface Temperature and Primary Productivity to change in Earth's Orbit Eccentricity - Simulations [Data Set] Anta Clarisse Sarr and Luc Beaufort https://doi.org/10.5281/zenodo.10951600

IPSL-CM5A2 source code used for "Evolution of ocean circulation in the North Atlantic Ocean during the Miocene: impact of the Greenland Ice Sheet and the Eastern Tethys Seaway'' Quentin Pillot https://doi.org/10.5281/zenodo.6772699

Morphometry, and mass accumulation rates of Indo-Pacific Pleistocene coccoliths and associated Climatic Simulations Luc Beaufort et al. https://doi.org/10.17882/84031

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Short summary
At present, under low eccentricity, the tropical ocean experiences a limited seasonality. Based on eight climate simulations of sea surface temperature and primary production, we show that, during high-eccentricity times, significant seasons existed in the tropics due to annual changes in the Earth–Sun distance. Those tropical seasons are slowly shifting in the calendar year to be distinct from classical seasons. Their past dynamics should have influenced phenomena like ENSO and monsoons.
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