Modeling Net Ecosystem Carbon Exchange of Alpine Grasslands with a Satellite-Driven Model
Yan, W; Hu, ZM; Zhao, YP; Zhang, XZ; Fan, YZ; Shi, PL; He, YT; Yu, GR; Li, YN
2015
Source PublicationPLOS ONE
ISSN1932-6203
Volume10Issue:4Pages:-
AbstractEstimate of net ecosystem carbon exchange (NEE) between the atmosphere and terrestrial ecosystems, the balance of gross primary productivity (GPP) and ecosystem respiration (Reco) has significant importance for studying the regional and global carbon cycles. Using models driven by satellite data and climatic data is a promising approach to estimate NEE at regional scales. For this purpose, we proposed a semi-empirical model to estimate NEE in this study. In our model, the component GPP was estimated with a light response curve of a rectangular hyperbola. The component Reco was estimated with an exponential function of soil temperature. To test the feasibility of applying our model at regional scales, the temporal variations in the model parameters derived from NEE observations in an alpine grassland ecosystem on Tibetan Plateau were investigated. The results indicated that all the inverted parameters exhibit apparent seasonality, which is in accordance with air temperature and canopy phenology. In addition, all the parameters have significant correlations with the remote sensed vegetation indexes or environment temperature. With parameters estimated with these correlations, the model illustrated fair accuracy both in the validation years and at another alpine grassland ecosystem on Tibetan Plateau. Our results also indicated that the model prediction was less accurate in drought years, implying that soil moisture is an important factor affecting the model performance. Incorporating soil water content into the model would be a critical step for the improvement of the model.
SubtypeJournal
Subject AreaScience & Technology - Other Topics
WOS Subject ExtendedMultidisciplinary Sciences
WOS KeywordGROSS PRIMARY PRODUCTION ; USE EFFICIENCY MODEL ; FLUX DATA ; TEMPERATURE-DEPENDENCE ; VEGETATION INDEXES ; FOREST ECOSYSTEMS ; INTEGRATING MODIS ; SOIL RESPIRATION ; DIOXIDE EXCHANGE ; TIBETAN PLATEAU
Indexed BySCI
Language英语
WOS IDWOS:000352477800134
PublisherPUBLIC LIBRARY SCIENCE
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44429
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
Yan, W,Hu, ZM,Zhao, YP,et al. Modeling Net Ecosystem Carbon Exchange of Alpine Grasslands with a Satellite-Driven Model[J]. PLOS ONE,2015,10(4):-.
APA Yan, W.,Hu, ZM.,Zhao, YP.,Zhang, XZ.,Fan, YZ.,...&Li, YN.(2015).Modeling Net Ecosystem Carbon Exchange of Alpine Grasslands with a Satellite-Driven Model.PLOS ONE,10(4),-.
MLA Yan, W,et al."Modeling Net Ecosystem Carbon Exchange of Alpine Grasslands with a Satellite-Driven Model".PLOS ONE 10.4(2015):-.
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