Fig. 7
From: A unified ensemble soil moisture dataset across the continental United States
Averaged wavelet power spectrum (y-axis) versus period in days (x-axis) for the daily soil moisture (SM) time series of the station soil measurements and 16 data products at the geographic center of the six primary KGCC zones: (a) Arid Desert, (b) Arid Steppe, (c) Temperate DrySum, (d) Temperate NoDry, (e) Cold DrySum, and (f) Cold NoDry. The four vertical gray lines from left to right correspond to periods of 1 month (30 days), 3 months (90 days), 6 months (180 days) and 1 year (365 days), respectively, starting from January 2016. Since the temporal resolutions of ML_CASM, ML_RSSSM, and ML_Zheng are 3 days, 10 days, and monthly, respectively (Table 1), we did not include these three datasets for the wavelet power spectrum analysis.
