Short CommunicationOpportunities and challenges of applications of satellite-derived sun-induced fluorescence at relatively high spatial resolution
Graphical abstract
The seasonal trajectories and relationships of GPP and OCO-2 SIF at an EC site in a mixed temperate forest (US-PFa) from 2014 to 2015.
Section snippets
Acknowledgments
This work was partially supported by the Fundamental Research Funds for the Central Universities in China (Grant No. 312231103). This work was also supported by the Chinese Arctic and Antarctic Administration, National Natural Science Foundation of China (Grant Nos. 41676176 and 41676182), the Chinese Polar Environment Comprehensive Investigation, Assessment Program. The study of US-PFa is funded by Department of Energy Office of Science, Ameriflux Network Management Project Support for UW
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Photochemical reflectance index (PRI) can be used to improve the relationship between gross primary productivity (GPP) and sun-induced chlorophyll fluorescence (SIF)
2020, Remote Sensing of EnvironmentCitation Excerpt :However, how the information from PRI can be used for estimating GPP in conjunction with SIF is yet to be demonstrated through data analysis. Many previous studies (Liu et al., 2017a; Liu et al., 2017b; Lu et al., 2018) developed relationships between GPP and observed SIF with consideration of the impact of canopy structure on SIF emission. A SIF signal observed from a vegetation canopy by a remote sensing sensor is only a portion of the total emitted SIF.
High-resolution satellite imagery applications in crop phenotyping: An overview
2020, Computers and Electronics in AgricultureCitation Excerpt :Moreover, such data can be integrated with optical bands to improve agricultural applications (Denize et al., 2018; Van Tricht et al., 2018). Another interesting development in near future is in the form of FLuorescence EXplorer (FLEX) mission (Lu et al., 2018; Quirós Vargas et al., 2019), that will allow steady-state chlorophyll fluorescence monitoring in crops. However, the spatial (300 m) and temporal resolution (27-day revisit time) may be low (Lu et al., 2018) for standard phenotyping applications.
Reduction of structural impacts and distinction of photosynthetic pathways in a global estimation of GPP from space-borne solar-induced chlorophyll fluorescence
2020, Remote Sensing of EnvironmentCitation Excerpt :It remains unclear which model is optimal at field and satellite levels, therefore, this study tested and compared three regression models (hyperbolic model, linear model with a non-zeros intercept, and linear model with a zero intercept). Generally, although nonlinear models provide a more accurate approximation to the relationship between SIF and GPP at the sub-daily or instantaneous scale (such as half-hour scale) (Damm et al., 2015; Gu et al., 2019), a linear model is frequently used to investigate the seasonal SIF-GPP relationship at the daily and longer temporal scales (Sun et al., 2017; Verma et al., 2017; Wood et al., 2017; Lu et al., 2018). In addition to EC flux tower GPP, three global GPP products are used for comparison purpose.