Accurate evapotranspiration (ET) measurements are fundamental for improving the understanding of water-energy related processes and for validating model simulations. However, ET is inherently difficult to measure unambiguously. The surface renewal (SR) method, which describes the turbulence exchange process from a new perspective, has been successfully applied within affordable costs from crops to tall forest canopies. However, the SR method, with its significant practical potential, remains uncommon in measuring ET, likely because a semiempirical calibration coefficient (α) is needed. Therefore, this study evaluates the performance of the SR method without any calibration, and compares ET measurements between the SR and Bowen ratio (BR) methods to test which method is more robust. The results from a two-year experiment at an arid vineyard show the following factors: 1) Daily ET estimates by the SR method (ET_SR) without calibration (α = 1) agree well with those from the BR method (ET_BR), with determination coefficient (R²), mean absolute error (MAE), root mean square error (RMSE), and mean absolute percent error (MAPE) values of 0.83, 0.41 mm/d, 0.57 mm/d, and 22.22 %, respectively; 2) Compared to ET_BR, ET_SR values calibrated using a α of 1.2 (ET_SR_∣α=1.2) contained the least error in terms of MAE (0.38 mm/d) and MAPE (19.64 %), followed by ET_SR_∣α=1.3 and ET_SR_∣α=1.1 without a significant difference; 3) ET_BR measurements were affected by abnormal BR value rejection criteria with wider rejection ranges associated with more significant differences between the ET_BR and ET_SR measurements; and 4) 61 % of BR values calculated from the SR-based fluxes were distributed in the range of −1 ∼ 1, whereas a maximum of 43 % were in the same range based on BR measurements under various abnormal BR rejection criteria. For the studied grapevine canopies, the uncalibrated SR method is more robust than the BR method, and it is easy, economic, and accurate for practical application.

准确的蒸发蒸腾 (ET) 测量对于提高对水能相关过程的理解和验证模型模拟至关重要。然而，ET 本质上难以明确测量。从新的角度描述湍流交换过程的表面更新 (SR) 方法已成功应用于从农作物到高大森林树冠的可负担成本。然而，具有显着实际潜力的 SR 方法在测量 ET 中仍然不常见，可能是因为需要半经验校准系数 (α)。因此，本研究在没有任何校准的情况下评估了 SR 方法的性能，并比较了 SR 和鲍文比 (BR) 方法之间的 ET 测量值，以测试哪种方法更稳健。² )、平均绝对误差 (MAE)、均方根误差 (RMSE) 和平均绝对百分比误差 (MAPE) 值分别为 0.83、0.41 mm/d、0.57 mm/d 和 22.22%；2) 与 ET_BR 相比，使用α为 1.2 (ET_SR _{∣ α =1.2} ) 校准的 ET_SR 值在 MAE (0.38 mm/d) 和 MAPE (19.64 %) 方面的误差最小，其次是 ET_SR _{∣ α =1.3}和ET_SR _{∣ α =1.1}没有显着差异；3) ET_BR 测量受到异常 BR 值拒绝标准的影响，拒绝范围越宽，ET_BR 和 ET_SR 测量之间的差异越显着；4) 从基于 SR 的通量计算的 61% 的 BR 值分布在 -1 ∼ 1 的范围内，而在各种异常 BR 拒绝标准下基于 BR 测量值，最大 43% 处于相同范围内。对于所研究的葡萄树冠，未校准的SR方法比BR方法更稳健，并且在实际应用中简单、经济、准确。