Pfynwald VPDrought experiment soil parameters
Datasets
Dataset content Continuous soil measurements (10-min resolution) from the Pfynwald long-term irrigation experiment, covering five treatments: **control, irrigation, irrigation+VPD, roof, roof+VPD**. Measurements were taken at multiple plots and at three depths (-0.1, -0.8, -1.2 m below soil surface). Sensors include TEROS-21 (matric potential), TEROS-12 (volumetric water content), TEROS-21 (soil temperature), and TEROS-12 (electrical conductivity). Processing steps **1. Raw retrieval** from the LWF database (`ada.v_messvar`, project `Pfynwald irrigation`), 10-min cadence. **2. Range filtering** to remove physically implausible values: - SWP: drop values ≥ 0 kPa or ≤ −8000 kPa - VWC: drop values ≤ 0 or - 0.8 m³/m³ - TEM: drop values - 40 °C or - −20 °C **3. Duplicate aggregation** within the same 10-min timestamp by mean (median for SWP). **4. Temperature correction (SWP_TC)**: matric potential is temperature-corrected using the TEROS-21 manufacturer equation referenced to T_ref = 20 °C: - Convert SWP (kPa) to head h = |SWP|·10.197, then pF = log10(h) - ΔpF = (919.890694·ΔT − 6.945352·ΔT²)·exp(−150.754657 / (pF + 9.153084)) - SWP_TC = −10^(pF + ΔpF) / 10.197 **5