Pleistocene terrestrial warming trend in East Asia linked to Antarctic ice sheets growth

How terrestrial mean annual temperature (MAT) evolved throughout the past 2 million years (Myr) remains elusive, limiting our understanding of the patterns, mechanisms, and impacts of past temperature changes. Here we report a ~2-Myr terrestrial MAT record based on fossil microbial lipids preserved in the Heqing paleolake, East Asia. The increased amplitude and periodicity shift of glacial-interglacial changes in our record align with those in sea surface temperature (SST) records. However, its long-term warming trend (1.0 °C/Myr, 95% CI = 0.4–1.7 °C/Myr) during 1.8–0.6 Myr ago diverges from the contemporaneous SST cooling. We propose that the Pleistocene warming in East Asia primarily resulted from regionally enhanced heat input and greenhouse effect of rising water vapor driven by Antarctic ice sheets (AIS) growth, highlighting the important climatic effect of AIS evolution. Such long-term warming across the Mid-Pleistocene Transition might have been beneficial for archaic humans’ flourishing in Eurasia. The authors quantify terrestrial temperature evolution over the past 2 million years by fossil lipids preserved in an ancient lake in East Asia. They showed a long-term warming trend that diverges from the contemporaneous global sea surface cooling.

• Publication year

  2025

• Venue

  Nature Communications

• Publication date

  2025-09-10

• Fields of study

  Geology, Medicine, Environmental Science

• Identifiers
  DOI 10.1038/s41467-025-63331-3PMID 40931091PMCID 12423306
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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