Fig. 4: Simulated impacts of larger withered grass stem (WGS) area on snow cover and surface energy budget.

a Box plots of simulated snow cover fraction (%) from December to May and its anomalies induced by heavier TPWSC and larger WGS. b–h are same as (a) but for snow depth (mm), snowmelt (mm), ground temperature (°C), soil moisture (liquid water; mm3 mm−3) at depth 0–1.38 m, surface net longwave radiation (NLR; W m−2), surface sensible heat (SH; W m−2) and surface latent heat (LH; W m−2), respectively. Anomalies of soil moisture, NLR, SH and LH are amplified by 10. The statistics in the box plots from the upper to lower bound represent the value of Q3 + 1.5 × (Q3–Q1), third quartile (Q3), mean (dot), median (horizontal solid line), first quartile (Q1), and Q1–1.5 × (Q3–Q1) successively. The value of Q3–Q1 denotes the interquartile range.