East–West Reverse Coupling Between Spring Soil Moisture and Summer Precipitation and Its Possible Responsibility for Wet Bias in GCMs Over Tibetan Plateau

The impact of soil moisture (SM) and precipitation coupling (SM-P-C) on the subsequent climate at daily to seasonal scales over Tibetan Plateau (TP) is a critical issue. In this study, spring SM summer (SSM-SP-C) were investigated using multi-reanalysis validated with 13 global models (GCMs) in Coupled Model Intercomparison Project Phase 5, its relationship wet bias GCMs was explored. results reveal that SSM-SP-C shows an east–west reversal, positive eastern central TP negative western TP. surface sensible heat has significantly effects strength TP, while TP; whereas, reverse concurrent SM-P-C trend from summer, but significant spatial differences. ensemble mean underestimates can't reproduce associated model's failure capturing SSM-SP-C. This study highlights impacts alpine cold region provides potential way for reducing biases by improving parameterizations GCMs.