Re-Examination of Errors and Exclusion Range, and Gap-Filling for Surface Flux Estimation Using the Bowen Ratio Method

抄録

 This paper presents a method for estimating turbulent fluxes using the Bowen ratio method. We propose a data exclusion criterion for the Bowen ratio method, defining an exclusion range for the Bowen ratios (B) as B₋ < B < B₊. To determine B₋ and B₊, we evaluated the flux difference between the Bowen ratio method and the eddy covariance method and suggested B₋ = −2.0 and B₊ = −0.6. We also propose an interpolation method to handle missing data based on the exclusion criteria by interpolating B/(1 + B) or 1/(1 + B). By implementing these approaches, we establish a comprehensive and practical framework for estimating turbulent fluxes with the Bowen ratio method. We expect that these results will enhance the accuracy and reliability of flux estimates in various environmental and climate studies.