Close relationship between spectral vegetation indices and V-cmax in deciduous and mixed forests
Zhou, YL; Ju, WM; Sun, XM; Hu, ZM; Han, SJ; Black, TA; Jassal, RS; Wu, XC
2014
Source PublicationTELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY
ISSN0280-6509
Volume66Pages:-
AbstractSeasonal variations of photosynthetic capacity parameters, notably the maximum carboxylation rate, V-cmax, play an important role in accurate estimation of CO2 assimilation in gas-exchange models. Satellite-derived normalised difference vegetation index (NDVI), enhanced vegetation index (EVI) and model-data fusion can provide means to predict seasonal variation in V-cmax. In this study, V-cmax was obtained from a process-based model inversion, based on an ensemble Kalman filter (EnKF), and gross primary productivity, and sensible and latent heat fluxes measured using eddy covariance technique at two deciduous broadleaf forest sites and a mixed forest site. Optimised V-cmax showed considerable seasonal and inter-annual variations in both mixed and deciduous forest ecosystems. There was noticeable seasonal hysteresis in V-cmax in relation to EVI and NDVI from 8 d composites of satellite data during the growing period. When the growing period was phenologically divided into two phases (increasing VIs and decreasing VIs phases), significant seasonal correlations were found between V-cmax and VIs, mostly showing R-2>0.95. V-cmax varied exponentially with increasing VIs during the first phase (increasing VIs), but second and third-order polynomials provided the best fits of V-cmax to VIs in the second phase (decreasing VIs). The relationships between NDVI and EVI with V-cmax were different. Further efforts are needed to investigate V-cmax-VIs relationships at more ecosystem sites to the use of satellite-based VIs for estimating V-cmax.
SubtypeJournal
KeywordV-cmax spectral vegetation indices ensemble Kalman filter BEPS model
Subject AreaMeteorology & Atmospheric Sciences
WOS Subject ExtendedMeteorology & Atmospheric Sciences
WOS KeywordENSEMBLE KALMAN FILTER ; TERRESTRIAL CHLOROPHYLL INDEX ; GROSS PRIMARY PRODUCTION ; NET ECOSYSTEM EXCHANGE ; GAP FILLING STRATEGIES ; BOREAL ASPEN FOREST ; PHOTOSYNTHETIC CAPACITY ; EDDY COVARIANCE ; WATER FLUXES ; TEMPERATURE-DEPENDENCE
Indexed BySCI
Language英语
WOS IDWOS:000334587800001
PublisherCO-ACTION PUBLISHING
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44597
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Zhou, YL,Ju, WM,Sun, XM,et al. Close relationship between spectral vegetation indices and V-cmax in deciduous and mixed forests[J]. TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY,2014,66:-.
APA Zhou, YL.,Ju, WM.,Sun, XM.,Hu, ZM.,Han, SJ.,...&Wu, XC.(2014).Close relationship between spectral vegetation indices and V-cmax in deciduous and mixed forests.TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY,66,-.
MLA Zhou, YL,et al."Close relationship between spectral vegetation indices and V-cmax in deciduous and mixed forests".TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY 66(2014):-.
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