2024
DOI: 10.1029/2024gl110342
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Rootzone Soil Moisture Dynamics Using Terrestrial Water‐Energy Coupling

Vinit Sehgal,
Binayak P. Mohanty,
Rolf H. Reichle

Abstract: A lack of high‐density rootzone soil moisture (θRZ) observations limits the estimation of continental‐scale, space‐time contiguous θRZ dynamics. We derive a proxy of daily θRZ dynamics — active rootzone degree of saturation (SRZ) — by recursive low‐pass (LP) filtering of surface soil moisture (θS) within a terrestrial water‐energy coupling (WEC) framework. We estimate the LP filter parameters and WEC thresholds for the piecewise‐linear coupling between SRZ and evaporative fraction (EF) at remote sensing and fi… Show more

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