Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 8
Articles | Volume 26, issue 8
https://doi.org/10.5194/acp-26-5861-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-5861-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 8
Research article
 | 
30 Apr 2026
Research article |  | 30 Apr 2026

A dipole pattern of orbital-scale precipitation oxygen isotope variation in North African monsoon region and the driving mechanism

Chengwei Ji, Qin Wen, Zhengyu Liu, Jian Liu, Deliang Chen, Liang Ning, Mi Yan, and Qiuzhen Yin

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Short summary
Geologist commonly use speleothem δ18Oc records to reconstruct past North African monsoon variability based on “amount effect” relationship between δ18Oc and monsoon rainfall. However, the interpretation of these records has been challenged in recent years. Here, we use isotope-enabled climate model to simulate climate change during the past 150,000 years. We find that changes in δ18Op across North African region are caused by multiple atmospheric processes, rather than by “amount effect”.
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