UC Berkeley postdoc presents low‑cost ET sensor that matched eddy covariance within 2–10% at wetlands
Carlos Juan of UC Berkeley described the variance‑bone‑ratio (VBR) sensor and pilot tests at three Delta wetlands, reporting annual VBR ET within 2–10% of eddy covariance at most sites while noting limits in advection and biomass‑accumulated sites.
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Carlos Juan, a postdoctoral researcher at UC Berkeley, told the DMEC that a variance‑bone‑ratio (VBR) approach can produce cost‑effective, near‑real‑time evapotranspiration (ET) estimates and could help fill local data gaps in the Delta. "From these testings, we saw a few limitations," he said, but across three wetlands the VBR totals "tracked surprisingly close" to eddy covariance, on the order of "within, I think, 2 to 10%."
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