IGSNRR OpenIR
Evaluation and comparison of light use efficiency models for their sensitivity to the diffuse PAR fraction and aerosol loading in China
Li, Xin1,2; Liang, Hongyu3; Cheng, Weiming1
2021-03-01
Source PublicationINTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
ISSN1569-8432
Volume95Pages:16
Corresponding AuthorLiang, Hongyu(allenhongyu.liang@connect.polyu.hk)
AbstractThe diffuse photosynthetically active radiation (PAR(dif)) is highly related to the gross primary productivity (GPP) of vegetation and can enhance the photosynthetic rate of shaded leaves. The PAR(dif) is mainly influenced by aerosols on clear sky days. To explore the impacts of the PAR(dif) fraction and aerosol loading on the accuracy of GPP estimations, we evaluated and compared the sensitivity of one-leaf and two-leaf light use efficiency (LUE) models (MOD17 and TL-LUE models) to the PAR(dif) fraction and aerosol optical depth (AOD) using satellite data and measurements at ChinaFLUX sites in China from 2003 to 2010. The estimated GPP from two models (GPP_MOD and GPP_TL) showed systematic underestimations when compared with the measured GPP at ChinaFLUX sites (GPP_FLUX). In addition, the underestimation of the GPP estimated by the two models was larger in months with high PAR(dif) fractions than in months with low PAR(dif) fractions at most sites. The TL-LUE model exhibited better performance than the MOD17 model with reduced underestimation and root-mean-square error (RMSE) values when the PAR(dif) fraction was greater than 0.7 or 0.8. When the PAR(dif) fraction was low, the TL-LUE model reduced the overestimation or increased the underestimations of GPP compared with the MOD17 model depending on the site. Both MOD17 and TL-LUE exhibited higher underestimations of GPP at high AOD values than at low AOD values at most sites. The TL-LUE model exhibited an overall better performance than MOD17 under high AOD. The overestimation also occurred for low AOD, which was consistent with that for low PARdif fractions. Therefore, the two LUE models showed dynamic performance with variations in the PAR(dif) fraction and AOD, which should be considered in the application and further improvement of GPP models.
KeywordPAR(dif) fraction Aerosol optical depth (AOD) Gross primary productivity (GPP) Sensitivity
DOI10.1016/j.jag.2020.102269
WOS KeywordGROSS PRIMARY PRODUCTION ; PRIMARY PRODUCTIVITY ; RADIATION ; PARAMETERIZATION ; IMPACTS
Indexed BySCI
Language英语
Funding ProjectChina Postdoctoral Science Foundation[2019M650830] ; Jiangsu Surveying and GIS Science Foundation[JSCHKY201912]
Funding OrganizationChina Postdoctoral Science Foundation ; Jiangsu Surveying and GIS Science Foundation
WOS Research AreaRemote Sensing
WOS SubjectRemote Sensing
WOS IDWOS:000601163600002
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/137836
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLiang, Hongyu
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100049, Peoples R China
2.Image Sky Int Co Ltd, Guangzhou, Peoples R China
3.Hong Kong Polytech Univ, Dept Land Surveying & Geoinformat, Hong Kong 999077, Peoples R China
Recommended Citation
GB/T 7714
Li, Xin,Liang, Hongyu,Cheng, Weiming. Evaluation and comparison of light use efficiency models for their sensitivity to the diffuse PAR fraction and aerosol loading in China[J]. INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,2021,95:16.
APA Li, Xin,Liang, Hongyu,&Cheng, Weiming.(2021).Evaluation and comparison of light use efficiency models for their sensitivity to the diffuse PAR fraction and aerosol loading in China.INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,95,16.
MLA Li, Xin,et al."Evaluation and comparison of light use efficiency models for their sensitivity to the diffuse PAR fraction and aerosol loading in China".INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION 95(2021):16.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, Xin]'s Articles
[Liang, Hongyu]'s Articles
[Cheng, Weiming]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, Xin]'s Articles
[Liang, Hongyu]'s Articles
[Cheng, Weiming]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, Xin]'s Articles
[Liang, Hongyu]'s Articles
[Cheng, Weiming]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.