研究目的
Investigating how the spatial scale mismatch between in situ and SMOS soil moisture evolves through timescales.
研究成果
The spatial representativeness of in situ stations tends to increase with the timescale, controlled by geophysical components such as precipitation heterogeneity, dry-down decays, and seasonal factors.
研究不足
The study is limited by the spatial and temporal resolution of the satellite and in situ measurements, and the representativeness of in situ stations may vary with location and time.
1：Experimental Design and Method Selection:
The study uses wavelet transforms to decompose soil moisture time series into different timescales and assesses spatial representativeness using wavelet-based correlations (WCor).
2：Sample Selection and Data Sources:
In situ measurements from the Little Washita permanent network, SMOS satellite data, AMSR2 data, and ECMWF model data are used.
3：List of Experimental Equipment and Materials:
SMOS sensor, AMSR2 radiometer, and ECMWF model.
4：Experimental Procedures and Operational Workflow:
Decomposition of time series into timescales using wavelet transforms, calculation of wavelet correlations between in situ and satellite/model data.
5：Data Analysis Methods:
Analysis of wavelet correlation scores to assess representativeness across timescales.
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