Comparison of extrapolation and interpolation methods for estimating daily photo synthetically active radiation (PAR): A case study of the Poyang Lake national nature reserve, China
Measurements of photosynthetically active radiation (PAR), which are indispensable for simulating plant growth and productivity, are generally very scarce. This study aimed to compare two extrapolation and one interpolation methods for estimating daily PAR reaching the earth surface within the Poyan...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Informa UK Limited
2010
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| Acceso en línea: | https://hdl.handle.net/10568/3184 |
| _version_ | 1855541935283896320 |
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| author | Wu, Guofeng Leeuw, Jan de Skidmore, Andrew K. Liu, Yaolin Prins, H.H.T. |
| author_browse | Leeuw, Jan de Liu, Yaolin Prins, H.H.T. Skidmore, Andrew K. Wu, Guofeng |
| author_facet | Wu, Guofeng Leeuw, Jan de Skidmore, Andrew K. Liu, Yaolin Prins, H.H.T. |
| author_sort | Wu, Guofeng |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Measurements of photosynthetically active radiation (PAR), which are indispensable for simulating plant growth and productivity, are generally very scarce. This study aimed to compare two extrapolation and one interpolation methods for estimating daily PAR reaching the earth surface within the Poyang Lake national nature reserve, China. The daily global solar radiation records at Nanchang meteorological station and daily sunshine duration measurements at nine meteorological stations around Poyang Lake were obtained to achieve the objective. Two extrapolation methods of PARs using recorded and estimated global solar radiation at Nanchang station and three stations (Yongxiu, Xingzi and Duchang) near the nature reserve were carried out, respectively, and a spatial interpolation method combining triangulated irregular network (TIN) and inverse distance weighting (IDW) was implemented to estimate daily PAR. The performance evaluation of the three methods using the PARs measured at Dahuchi Conservation Station (day number of measurement = 105 days) revealed that: (1) the spatial interpolation method achieved the best PAR estimation (R 2 = 0.89, s.e. = 0.99, F = 830.02, P < 0.001); (2) the extrapolation method from Nanchang station obtained an unbiased result (R 2 = 0.88, s.e. = 0.99, F = 745.29, P < 0.001); however, (3) the extrapolation methods from Yongxiu, Xingzi and Duchang stations were not suitable for this specific site for their biased estimations. Considering the assumptions and principles supporting the extrapolation and interpolation methods, the authors conclude that the spatial interpolation method produces more reliable results than the extrapolation methods and holds the greatest potential in all tested methods, and more PAR measurements should be recorded to evaluate the seasonal, yearly and spatial stabilities of these models for their application to the whole nature reserve of Poyang Lake. |
| format | Journal Article |
| id | CGSpace3184 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2010 |
| publishDateRange | 2010 |
| publishDateSort | 2010 |
| publisher | Informa UK Limited |
| publisherStr | Informa UK Limited |
| record_format | dspace |
| spelling | CGSpace31842023-10-02T10:23:55Z Comparison of extrapolation and interpolation methods for estimating daily photo synthetically active radiation (PAR): A case study of the Poyang Lake national nature reserve, China Wu, Guofeng Leeuw, Jan de Skidmore, Andrew K. Liu, Yaolin Prins, H.H.T. Measurements of photosynthetically active radiation (PAR), which are indispensable for simulating plant growth and productivity, are generally very scarce. This study aimed to compare two extrapolation and one interpolation methods for estimating daily PAR reaching the earth surface within the Poyang Lake national nature reserve, China. The daily global solar radiation records at Nanchang meteorological station and daily sunshine duration measurements at nine meteorological stations around Poyang Lake were obtained to achieve the objective. Two extrapolation methods of PARs using recorded and estimated global solar radiation at Nanchang station and three stations (Yongxiu, Xingzi and Duchang) near the nature reserve were carried out, respectively, and a spatial interpolation method combining triangulated irregular network (TIN) and inverse distance weighting (IDW) was implemented to estimate daily PAR. The performance evaluation of the three methods using the PARs measured at Dahuchi Conservation Station (day number of measurement = 105 days) revealed that: (1) the spatial interpolation method achieved the best PAR estimation (R 2 = 0.89, s.e. = 0.99, F = 830.02, P < 0.001); (2) the extrapolation method from Nanchang station obtained an unbiased result (R 2 = 0.88, s.e. = 0.99, F = 745.29, P < 0.001); however, (3) the extrapolation methods from Yongxiu, Xingzi and Duchang stations were not suitable for this specific site for their biased estimations. Considering the assumptions and principles supporting the extrapolation and interpolation methods, the authors conclude that the spatial interpolation method produces more reliable results than the extrapolation methods and holds the greatest potential in all tested methods, and more PAR measurements should be recorded to evaluate the seasonal, yearly and spatial stabilities of these models for their application to the whole nature reserve of Poyang Lake. 2010-01 2011-02-14T09:33:22Z 2011-02-14T09:33:22Z Journal Article https://hdl.handle.net/10568/3184 en Open Access Informa UK Limited Wu, Guofeng, Leeuw, J. de, Skidmore, A.K., Liu, Yaolin and Prins, H.H.T. 2010. Comparison of extrapolation and interpolation methods for estimating daily photosynthetically active radiation (PAR): A case study of the Poyang Lake national nature reserve, China. Geo-Spatial Information Science 13(4):235-242. |
| spellingShingle | Wu, Guofeng Leeuw, Jan de Skidmore, Andrew K. Liu, Yaolin Prins, H.H.T. Comparison of extrapolation and interpolation methods for estimating daily photo synthetically active radiation (PAR): A case study of the Poyang Lake national nature reserve, China |
| title | Comparison of extrapolation and interpolation methods for estimating daily photo synthetically active radiation (PAR): A case study of the Poyang Lake national nature reserve, China |
| title_full | Comparison of extrapolation and interpolation methods for estimating daily photo synthetically active radiation (PAR): A case study of the Poyang Lake national nature reserve, China |
| title_fullStr | Comparison of extrapolation and interpolation methods for estimating daily photo synthetically active radiation (PAR): A case study of the Poyang Lake national nature reserve, China |
| title_full_unstemmed | Comparison of extrapolation and interpolation methods for estimating daily photo synthetically active radiation (PAR): A case study of the Poyang Lake national nature reserve, China |
| title_short | Comparison of extrapolation and interpolation methods for estimating daily photo synthetically active radiation (PAR): A case study of the Poyang Lake national nature reserve, China |
| title_sort | comparison of extrapolation and interpolation methods for estimating daily photo synthetically active radiation par a case study of the poyang lake national nature reserve china |
| url | https://hdl.handle.net/10568/3184 |
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