| 基于光合有效辐射瞬时值估算日均值的方法 |
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| 引用本文： | 张璟,谢亚楠,汪鸣泉,王茂华.基于光合有效辐射瞬时值估算日均值的方法[J].干旱区研究,2019,36(1):220-227. |
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| 作者姓名： | 张璟 谢亚楠 汪鸣泉 王茂华 |
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| 作者单位： | 上海大学,上海先进通信与数据科学研究院,特种光纤与光接入网重点实验室,上海200000;中国科学院上海高等研究院,碳数据与碳评估中心,上海200000;上海大学,上海先进通信与数据科学研究院,特种光纤与光接入网重点实验室,上海200000;中国科学院上海高等研究院,碳数据与碳评估中心,上海200000 |
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| 基金项目： | 国家重点研发计划;国家重点研发计划;国家自然科学基金;中国科学院青年创新促进会项目 |
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| 摘 要： | 光合有效辐射是太阳辐射的一部分,是植被进行光合作用和陆地生态系统碳循环的核心因素,对估算植被生产力具有重要影响。本文基于SURFRAD多年观测数据,建立了一个线性回归模型,由上午、下午瞬时光合有效辐射值估算日均值。该模型模拟效果较好,单个观测站的均方误差低于9 W·m^-2,判定系数不低于0.96,并适用于不同经纬度、气候条件和海拔高度下的区域,总的均方误差为8.863 1 W·m^-2,判定系数R2为0.977,表明该模型和方法有较好的可行性和可靠性。
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| 关 键 词： | 光合有效辐射 瞬时值 日均值 线性回归模型 方法研究 |
Estimation of Daily Value from PAR Instantaneous Value |
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| 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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| Authors: | ZHANG Jing XIE Ya-nan WANG Ming-quan WANG Mao-hua |
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| Institution: | (Key laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai Institute of Advanced Communication and Data Science,Shanghai University,Shanghai 200000,China;Shanghai Carbon Data Research Center, Shanghai Advanced Research Institute, Chinese Academy of Sciences,Shanghai 200000, China) |
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| 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. |
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| Keywords: | photosynthetically active radiation instantaneous value daily value linear regression model meth-od research |
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