Depth-dependent soil heat amplification outpace than near-surface air down to ~40 cm depth.
Stronger soil heat amplification is driven by hypersensitive soil moisture-temperature coupling regime.
Both soil heat amplification and its depth dependence are projected to persist in the future.
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Annual temperature distributions across soil and atmosphere during 1981–2020 based on ERA5-Land
Upper-bound rise of annual temperature distributions and its vertical heterogeneity in soil and atmosphere during 1981–2020
Upper-tail widening of soil temperature distributions and its depth dependence during 1981–2020
Long-term trends and contributions in drivers behind heat amplification
Conceptual diagram illustrating vertical heterogeneity of heat extreme amplification in atmosphere and soil
Detection and attribution of soil heat amplification and its depth dependence during 1981–2020
Projected soil heat amplification and its depth dependence