Characteristics of near‐surface soil freeze–thaw status using high resolution <scp>CLM5.0</scp> simulations on the Tibetan Plateau

Soil freeze–thaw alternation is a natural characteristic of the Tibetan Plateau (TP), and plays an important role in surface energy balance eco-hydrological processes. The soil process on TP has changed significantly owing to global warming, affecting alpine ecosystem structure function. This study used high-resolution atmospheric forcing datasets drive Community Land Model version 5.0 (CLM5.0) simulate near-surface status between 1979 2020. simulated results were compared with situ observations, then spatiotemporal distribution freeze start-date (FSD), end-date (FED), duration (FD), thaw (TD) at depth 0.1 m analyzed. Nash–Sutcliffe efficiency coefficients (NSEs) FSD, FED, FD, TD simulations observations 0.77, 0.90, 0.98 0.92, correlation 0.97, 0.99, 0.99 0.98, respectively. spatial FSD was characterized by gradually increasing from northwest southeast while FED FD exhibited opposite characteristics. area-mean rate 1.1, −1.4, −2.5, 2.5 days decade−1, provides reference for analyzing predicting changes near under warming climate.