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Natural variability of bio-optical properties in Case 1 waters: attenuation and reflectance within the visible and near-UV spectral domains, as observed in South Pacific and Mediterranean waters ArchiMer
Morel, A.; Claustre, H.; Antoine, D.; Gentili, B..
The optical properties of Case 1 waters have been empirically related to the chlorophyll concentration, [Chl], historically used as an index of the trophic state and of the abundance of the biological materials. The well-known natural variability around the mean statistical relationships is here examined by comparing the apparent optical properties (spectral downward irradiance attenuation and reflectance) as a function of [Chl] in two Case 1 environments, the Pacific and Mediterranean waters. These oceanic zones apparently represent two extremes of the possible bio-optical variability range around the mean. The systematic deviations, in both directions with respect to the average laws, mainly result from the differing contents in non-algal detrital...
Tipo: Text Palavras-chave: Light absorption; Algal biomass; Ocean color; Chlorophyll; Sea; Phytoplankton; Model; Coefficients; Algorithms.
Ano: 2007 URL: https://archimer.ifremer.fr/doc/00209/32012/30549.pdf
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การปรับค่าสัมประสิทธิ์เพื่อปรับปรุงความแม่นยำของแบบจำลอง CSM-CROPGRO-Peanut ในการเจริญเติบโตของรากถั่วลิสง Thai Agricultural
Nuntawoot Jongrungklang; Banyong Toomsan; Sanun Jogloy; Nimitr Vorasoot; Patcharin Songsri; Aran Patanothai.
Important input factors that affect root growth under field conditions have not been included in CSM-CROPGRO-Peanut model, resulting in poor simulation of some rooting traits. Hence, the objective of this study was to optimize root growth factors for obtaining the suitable value with particular genotypes and environments. Two root growth factors including 1) fraction partitioning to leaf (YLEAF) and 2) root growth factor in soil layers were adjusted. Root mean square error (RMSE) and index of agreement (d) that were the statistical agreement between observed data and simulated data were used for considering the best fit values of root growth factor. The statistical agreement between observed and simulated data of root dry weight and root length density...
Tipo: Collection Palavras-chave: Peanut; Root dry weight; Root length density; Statistical agreement; Growth model; Coefficients; Total dry matter; CSM-CROPGRO-Peanut model; ถั่วลิสง; น้ำหนักแห้งราก; ความหนาแน่นราก; ความสอดคล้องทางสถิต; แบบจำลองการเจริญเติบโต; น้ำหนักแห้งทั้งหมด; ค่าสัมประสิทธิ์; ความแม่นยำ; พันธุ์; สภาพแวดล้อม.
Ano: 2011 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5114
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