Wu, Genghong, Kaiyu Guan, Chongya Jiang, Bin Peng, Hyungsuk Kimm, Min Chen, Xi Yang, et al. 2020. “Radiance-Based NIRv As a Proxy for GPP of Corn and Soybean”. Environmental Research Letters 15 (3): 034009.
Publications
2020
Shugart, HH, Adrianna Foster, Bin Wang, Dan Druckenbrod, Jianyong Ma, Manuel Lerdau, Sassan Saatchi, Xi Yang, and Xiaodong Yan. 2020. “Gap Models across Micro-to Mega-Scales of Time and Space: Examples of Tansleyâs Ecosystem Concept”. Forest Ecosystems 7 (1): 1–18.
Wang, Cong, Kaiyu Guan, Bin Peng, Min Chen, Chongya Jiang, Yelu Zeng, Genghong Wu, et al. 2020. “Satellite Footprint Data from OCO-2 and TROPOMI Reveal Significant Spatio-Temporal and Inter-Vegetation Type Variabilities of Solar-Induced Fluorescence Yield in the US Midwest”. Remote Sensing of Environment 241: 111728.
Helm, Levi, Hanyu Shi, Manuel Lerdau, and Xi Yang. 2020. “Solar-Induced Chlorophyll Fluorescence and Short-Term Photosynthetic Response to Drought”. Ecological Applications 30 (5).
Zhang, Zhaoying, Yongguang Zhang, Albert Porcar-Castell, Joanna Joiner, Luis Guanter, Xi Yang, Mirco Migliavacca, et al. 2020. “Reduction of Structural Impacts and Distinction of Photosynthetic Pathways in a Global Estimation of GPP from Space-Borne Solar-Induced Chlorophyll Fluorescence”. Remote Sensing of Environment 240: 111722.
Miao, Guofang, Kaiyu Guan, Andrew Suyker, Xi Yang, Timothy Arkebauer, Elizabeth Walter-Shea, Hyungsuk Kimm, et al. 2020. “Varying Contributions of Drivers to the Relationship Between Canopy Photosynthesis and Far-Red Sun-Induced Fluorescence for Two Maize Sites at Different Temporal Scales”. Journal of Geophysical Research: Biogeosciences.
Li, Zhaohui, Qian Zhang, Ji Li, Xi Yang, Yunfei Wu, Zhaoying Zhang, Songhan Wang, Hezhou Wang, and Yongguang Zhang. 2020. “Solar-Induced Chlorophyll Fluorescence and Its Link to Canopy Photosynthesis in Maize from Continuous Ground Measurements”. Remote Sensing of Environment 236: 111420. https://doi.org/https://doi.org/10.1016/j.rse.2019.111420.
Remote sensing of solar-induced chlorophyll fluorescence (SIF) provides great potential for estimating gross primary production (GPP) of terrestrial ecosystems. A strong relationship between SIF and GPP has been observed at the seasonal scale from both ground-based and satellite observations. However, variations of SIF due to changes in plant growth stages appear to influence the SIF-GPP relationship. It remains unclear how this relationship is affected by plant growth-related changes, especially for C4 plants such as maize. In this study, continuous in situ measurements for canopy far-red SIF retrieval and GPP calculation were made in maize during the growing season of 2017. Diurnal and seasonal variations of canopy SIF and its yield (SIFyield) were analyzed over different growth stages of maize to understand how they affect the relationship with GPP. The results show that the relationship between SIF and GPP varies with the growth stages of maize during the growing season, indicating that canopy structure has a strong impact on the seasonal variations of canopy SIF and its relation to GPP. Furthermore, we found that SIFyield is significantly correlated with canopy photosynthetic light use efficiency (LUE) at the canopy level throughout the season. However, it is almost uncorrelated with LUE after adjusting for the effects of canopy structure with the structural vegetation index MTVI2. This finding highlights the importance of canopy structure in the relationship between SIFyield and LUE, complicating the use of canopy SIF for tracking vegetation physiological activity. Overall, our observation-based findings show that canopy structure affects the SIF-GPP relationship, strengthening our understanding of the mechanistic link between SIF and photosynthesis.
Yi, Koong, Jacob Smith, Andrew Jablonski, Elizabeth Tatham, Todd Scanlon, Manuel Lerdau, Kimberly Novick, and Xi Yang. 2020. “High Heterogeneity in Canopy Temperature Among Co-Occurring Tree Species in a Temperate Forest”. Journal of Geophysical Research: Biogeosciences, e2020JG005892.
Shan, Nan, Yongguang Zhang, Jing M Chen, Weimin Ju, Mirco Migliavacca, Josep Pe\~nuelas, Xi Yang, Zhaoying Zhang, Jacob A Nelson, and Yves Goulas. 2020. “A Model for Estimating Transpiration from Remotely Sensed Solar-Induced Chlorophyll Fluorescence”. Remote Sensing of Environment 252: 112134.
Carter, Kelsey R, Tana E Wood, Sasha C Reed, Elsa C Schwartz, Madeline B Reinsel, Xi Yang, and Molly A Cavaleri. 2020. “Photosynthetic and Respiratory Acclimation of Understory Shrubs in Response to in Situ Experimental Warming of a Wet Tropical Forest”. Frontiers in Forests and Global Change 3: 765-85.