基于光合有效辐射瞬时值估算日均值的方法

doi:10.13866/j.azr.2019.01.25

Abstract

Abstract: Photosynthetically active radiation (PAR) commonly refers to solar radiation in the visible (400-700 nm) part of the electromagnetic spectrum.Despite its potential and critical application in terrestrial ecosystem modelling,surface PAR is not typically a routine observation at meteorological station.Remote sensing can be used to derive the spatiotemporally continuous instantaneous PAR,but the researches about daily PAR estimation are deficient,and their accuracy cannot be guaranteed.In this paper,a linear regression model was developed to calculate the daily PAR based on Surface Radiation Budget Network (SURFRAD) data through the instantaneous and theoretical PAR.The results indicated that the model was effective with root mean square errors (RMSE) about 8.863 1 W·m^-2,with coefficient of determination (R²) about 0.977 without the limitations of areas.

Key words: photosynthetically active radiation, instantaneous value, daily value, linear regression model, method research

ZHANG Jing, XIE Ya-nan, WANG Ming-quan, WANG Mao-hua. Estimation of Daily Value from PAR Instantaneous Value[J].Arid Zone Research, 2019, 36(1): 220-227.

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Estimation of Daily Value from PAR Instantaneous Value

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