Article
Ecology
Alexander J. Turner, Philipp Kohler, Troy S. Magney, Christian Frankenberg, Inez Fung, Ronald C. Cohen
Summary: A study developed a parsimonious relationship between TROPOMI's SIF and GPP in the US, using a Gaussian mixture model. The research found that extreme precipitation events cause regional GPP anomalies, but overall, there is less than 4% variation in CONUS GPP between 2018 and 2019.
Article
Environmental Sciences
Hao Jiang, Zhigang Liu, Jin Wang, Peiqi Yang, Runfei Zhang, Xiuping Zhang, Pu Zheng
Summary: This study explores the feasibility of estimating non-photochemical quenching (NPQ) using remote sensing technology, considering the two components of NPQ. The experimental results show that fF captures NPQ variations well under high illumination, while IRECI and NIRv are sensitive to the non-qE component variation under low illumination. Coupling fF with either IRECI or NIRv improves the accuracy of NPQ estimation. These findings contribute to the further development of remote sensing methods for NPQ estimation at the canopy scale in the future.
Article
Plant Sciences
Van Lam Nguyen, Lachlan Palmer, James Stangoulis
Summary: This study characterized the agronomic traits, gas exchange, and chlorophyll traits of two wheat genotypes that differ in phosphorus use efficiency (PUE). The results showed that the genotype with higher PUE exhibited better agronomic traits and photosynthetic capacity. These findings are important for screening for crop varieties with high PUE.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Agronomy
Maria Laskari, George Menexes, Ilias Kalfas, Ioannis Gatzolis, Christos Dordas
Summary: Water availability has a significant impact on the morphological and physiological characteristics of maize as well as the environmental cost. Climate change has led to water stress even in previously well-supplied areas. However, farmers can still maintain or improve crop yield by effectively managing water resources in limited supply.
Article
Agronomy
Youbo Wei, Sicheng Liu, Dongliang Xiong, Zhuang Xiong, Zuolin Zhang, Fei Wang, Jianliang Huang
Summary: Manipulating the photoprotective mechanism is an effective way to enhance crop photosynthetic productivity. This study investigated the variation and genetic basis of NPQ(T) in rice and identified significant associated signals and candidate genes. The findings provide a comprehensive understanding of the genetic architecture of NPQ(T) and could be used for genetic improvement of rice photoprotection.
Article
Plant Sciences
Cong Wang, Qiuli Gu, Lianjia Zhao, Chunyan Li, Jintao Ren, Jianxin Zhang
Summary: This study used chlorophyll fluorescence to evaluate the effects of high temperature and high light on soybean inverted leaves. The results showed that inverted leaves exhibited lower photosynthetic performance and activity of photosystem II under these stresses.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Environmental Sciences
Jingyi Jiang, Alexis Comar, Marie Weiss, Frederic Baret
Summary: Many plant species exhibit distinct optical properties between the upper and lower leaf faces. The FASPECT model, an evolution of the PROSPECT model, accurately simulates these differences by incorporating additional parameters to describe the differences in leaf optical properties between the two faces.
REMOTE SENSING OF ENVIRONMENT
(2021)
Article
Plant Sciences
Erik P. Hamerlynck, Rory C. O'Connor
Summary: Soil-water availability affects the ecophysiology of reproductive structures in crested wheatgrass and squirreltail wild rye. Watering can increase photosynthetic efficiency, particularly in seed heads. The photosynthetic characteristics of seed heads may contribute to the differential ability of these species to establish from seed.
Article
Plant Sciences
Aida Shomali, Sasan Aliniaeifard, Mohammad Mohammadian, Mahmoud Lotfi, Hazem M. Kalaji
Summary: High light intensity has a significant impact on the photosynthetic apparatus of tomatoes. Different genotypes show varying responses, with tolerant genotypes exhibiting reduced photoinhibitory quenching compared to sensitive genotypes. Quantum yield components also shift under high light, favoring the quantum yield of non-photochemical quenching and basal energy loss, while reducing the quantum yield of photosystem II. These findings provide insights into the mechanisms of high light tolerance in tomatoes and can aid in the development of resilient crops for variable light conditions.
PHYSIOLOGIA PLANTARUM
(2023)
Article
Biochemistry & Molecular Biology
Jakub Oliwa, Andrzej Skoczowski, Grzegorz Rut, Andrzej Kornas
Summary: The aim of this experiment was to study the response of Platycerium bifurcatum's photosynthesis to a 6-week water deficit. The results showed that after a decrease in leaf hydration by 10-15%, disturbances in the photosynthetic process occurred, especially in the initial photochemical reactions, leading to a rapid decrease in plant vitality and significant fluctuations in chlorophyll a fluorescence parameters. The relative size of PSI antenna structures compared to PSII also decreased in the following weeks of water deficit. Changes in the functioning of photosynthesis light phase and the pigment composition of leaves were related to the resistance of elkhorn fern to long-term water deficit.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Plant Sciences
Kaori Kohzuma, Maro Tamaki, Kouki Hikosaka
Summary: A method using NPQ(T) to correct PRI for assessing plant responses to drought stress was proposed. Results suggest that PRI is an excellent indicator of environmental stress and recovery in plants, serving as a high-throughput stress detection tool in agriculture.
JOURNAL OF PLANT RESEARCH
(2021)
Article
Biotechnology & Applied Microbiology
Mariana Carneiro, Graziella Chini Zittelli, Bernardo Cicchi, Eleftherios Touloupakis, Cecilia Faraloni, Ines B. Maia, Hugo Pereira, Tamara Santos, Francisco X. Malcata, Ana Otero, Joao Varela, Giuseppe Torzillo
Summary: In the study, in situ chlorophyll a fluorescence measurements were used to monitor changes in photochemical variables of Nannochloropsis oceanica cultures under nitrogen-deplete and nitrogen-replete conditions. Changes in lipid content and de-epoxidation state of xanthophyll cycle pigments were the first biochemical variables triggered by the change in nutrient status, showing a good correlation with the in situ effective quantum yield of PSII (Delta F'/F-m').
BIOTECHNOLOGY AND BIOENGINEERING
(2021)
Article
Chemistry, Analytical
Kamila Haule, Wlodzimierz Freda
Summary: The study combined two models to examine the influence of dispersed oil on the visibility of seawater, finding that in clear waters, the absolute values of remote sensing reflectance increased 2-6 times after simulated dispersed oil pollution, while band ratios routinely applied in bio-optical models decreased by up to 80%.
Article
Agronomy
Paulina A. Rajewicz, Chao Zhang, Jon Atherton, Shari Van Wittenberghe, Anu Riikonen, Troy Magney, Beatriz Fernandez-Marin, Jose Ignacio Garcia Plazaola, Albert Porcar-Castell
Summary: Chlorophyll fluorescence can be used as a proxy for photosynthesis in boreal forests. This study measured the spectral chlorophyll fluorescence in leaves of three dominant evergreen species in the boreal ecosystem and analyzed the correlations with other traits to understand the spatial and temporal variation in chlorophyll fluorescence. The findings suggest that the diversity of species and light environments within an ecosystem generate baseline variation in leaf spectral chlorophyll fluorescence and contrasting seasonal photosynthetic acclimation patterns.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Plant Sciences
Julin Ma, Meng Sun, Lingling Qiu, Yinfeng Xie, Yingli Ma, Wenchao Liang
Summary: This study focused on the physiological regulation and mechanism of exogenous 5-aminolevulinic acid (5-ALA) in the late growth of P. heterophylla. The results showed that an appropriate concentration of 5-ALA can significantly increase the yield of root and biomass, stimulate antioxidation activities, enhance photosynthetic activity, and change the chlorophyll fluorescence parameters and kinetic parameters. Moreover, there were significant correlations between the yield of root, biomass allocation, and antioxidant enzyme activities.
Article
Plant Sciences
Twinkle Solanki, Pedro J. Aphalo, Santa Neimane, Saara M. Hartikainen, Marta Pieriste, Alexey Shapiguzov, Albert Porcar-Castell, Jon Atherton, Anu Heikkila, Thomas Matthew Robson
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2019)
Article
Environmental Sciences
Caroline J. Nichol, Guillaume Drolet, Albert Porcar-Castell, Tom Wade, Neus Sabater, Elizabeth M. Middleton, Chris MacLellan, Janne Levula, Ivan Mammarella, Timo Vesala, Jon Atherton
Article
Environmental Sciences
Paulina A. Rajewicz, Jon Atherton, Luis Alonso, Albert Porcar-Castell
Article
Ecology
Aud H. Halbritter, Hans J. De Boeck, Amy E. Eycott, Sabine Reinsch, David A. Robinson, Sara Vicca, Bernd Berauer, Casper T. Christiansen, Marc Estiarte, Jose M. Grunzweig, Ragnhild Gya, Karin Hansen, Anke Jentsch, Hanna Lee, Sune Linder, John Marshall, Josep Penuelas, Inger Kappel Schmidt, Ellen Stuart-Haentjens, Peter Wilfahrt, Vigdis Vandvik, Nelson Abrantes, Maria Almagro, Inge H. J. Althuizen, Isabel C. Barrio, Mariska te Beest, Claus Beier, Ilka Beil, Z. Carter Berry, Tone Birkemoe, Jarle W. Bjerke, Benjamin Blonder, Gesche Blume-Werry, Gil Bohrer, Isabel Campos, Lucas A. Cernusak, Bogdan H. Chojnicki, Bernhard J. Cosby, Lee T. Dickman, Ika Djukic, Iolanda Filella, Lucia Fuchslueger, Albert Gargallo-Garriga, Mark A. K. Gillespie, Gregory R. Goldsmith, Christopher Gough, Fletcher W. Halliday, Stein Joar Hegland, Guenter Hoch, Petr Holub, Francesca Jaroszynska, Daniel M. Johnson, Scott B. Jones, Paul Kardol, Jan J. Keizer, Karel Klem, Heidi S. Konestabo, Juergen Kreyling, Gyorgy Kroel-Dulay, Simon M. Landhausser, Klaus S. Larsen, Niki Leblans, Inma Lebron, Marco M. Lehmann, Jonas J. Lembrechts, Armando Lenz, Anja Linstaedter, Joan Llusia, Marc Macias-Fauria, Andrey Malyshev, Pille Mand, Miles Marshall, Ashley M. Matheny, Nate McDowell, Ina C. Meier, Frederick C. Meinzer, Sean T. Michaletz, Megan L. Miller, Lena Muffler, Michal Oravec, Ivika Ostonen, Albert Porcar-Castell, Catherine Preece, Iain C. Prentice, Dajana Radujkovic, Virve Ravolainen, Relena Ribbons, Jan C. Ruppert, Lawren Sack, Jordi Sardans, Andreas Schindlbacher, Christine Scoffoni, Bjarni D. Sigurdsson, Simon Smart, Stuart W. Smith, Fiona Soper, James D. M. Speed, Anne Sverdrup-Thygeson, Markus A. K. Sydenham, Arezoo Taghizadeh-Toosi, Richard J. Telford, Katja Tielboerger, Joachim P. Topper, Otmar Urban, Martine van der Ploeg, Leandro Van Langenhove, Kristyna Vecerova, Arne Ven, Erik Verbruggen, Unni Vik, Robert Weigel, Thomas Wohlgemuth, Lauren K. Wood, Julie Zinnert, Kamal Zurba
METHODS IN ECOLOGY AND EVOLUTION
(2020)
Article
Environmental Sciences
Zhaoying Zhang, Yongguang Zhang, Albert Porcar-Castell, Joanna Joiner, Luis Guanter, Xi Yang, Mirco Migliavacca, Weimin Ju, Zhigang Sun, Shiping Chen, David Martini, Qian Zhang, Zhaohui Li, James Cleverly, Hezhou Wang, Yves Goulas
REMOTE SENSING OF ENVIRONMENT
(2020)
Article
Agronomy
Songhan Wang, Yongguang Zhang, Weimin Ju, Albert Porcar-Castell, Shanshan Ye, Zhaoying Zhang, Christian Bruemmer, Marek Urbaniak, Ivan Mammarella, Radoslaw Juszczak, K. Folkert Boersma
AGRICULTURAL AND FOREST METEOROLOGY
(2020)
Article
Agronomy
Zhaoying Zhang, Yongguang Zhang, Qian Zhang, Jing M. Chen, Albert Porcar-Castell, Luis Guanter, Yunfei Wu, Xiaokang Zhang, Hezhou Wang, Dawei Ding, Zhongyang Li
AGRICULTURAL AND FOREST METEOROLOGY
(2020)
Article
Biochemistry & Molecular Biology
Shari Van Wittenberghe, Valero Laparra, Jose Ignacio Garcia-Plazaola, Beatriz Fernandez-Marin, Albert Porcar-Castell, Jose Moreno
Summary: Carotenoids play a versatile role in regulating energy flow in plants, particularly through the operation of xanthophyll cycles. This study observed quick antenna adjustments during a dark-to-high-light induction by analyzing absorbance changes and Chla fluorescence in leaves. The results showed complex kinetic behaviors in the 500-600 nm region, indicating a rapid redistribution and relaxation of excitation energy, with implications for the role of antheraxanthin and zeaxanthin.
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
(2021)
Article
Plant Sciences
Vicent Agusti Ribas Costa, Maxime Durand, T. Matthew Robson, Albert Porcar-Castell, Ilkka Korpela, Jon Atherton
Summary: This study presents a method using an uncrewed aircraft system (UAS) spherical photographic approach to obtain structural traits throughout the depth of tree canopies. The results show that this method can explain a high percentage of the variation in plant area index (PAI) and has good agreement with airborne laser scanning data in certain canopy types. The new method provides an affordable and safe way to estimate the vertical dimension of previously inaccessible canopy structural traits.
Article
Plant Sciences
David Martini, Karolina Sakowska, Georg Wohlfahrt, Javier Pacheco-Labrador, Christiaan van der Tol, Albert Porcar-Castell, Troy S. Magney, Arnaud Carrara, Roberto Colombo, Tarek S. El-Madany, Rosario Gonzalez-Cascon, Maria Pilar Martin, Tommaso Julitta, Gerardo Moreno, Uwe Rascher, Markus Reichstein, Micol Rossini, Mirco Migliavacca
Summary: The study investigated the impact of the 2018 European heatwave on the GPP-SIF relationship in evergreen broadleaved trees, revealing an inversion of the photosynthesis-fluorescence relationship due to extreme heat stress and changes in energy dissipation pathways.
Article
Agronomy
Paulina A. Rajewicz, Chao Zhang, Jon Atherton, Shari Van Wittenberghe, Anu Riikonen, Troy Magney, Beatriz Fernandez-Marin, Jose Ignacio Garcia Plazaola, Albert Porcar-Castell
Summary: Chlorophyll fluorescence can be used as a proxy for photosynthesis in boreal forests. This study measured the spectral chlorophyll fluorescence in leaves of three dominant evergreen species in the boreal ecosystem and analyzed the correlations with other traits to understand the spatial and temporal variation in chlorophyll fluorescence. The findings suggest that the diversity of species and light environments within an ecosystem generate baseline variation in leaf spectral chlorophyll fluorescence and contrasting seasonal photosynthetic acclimation patterns.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Environmental Sciences
Jaakko Oivukkamaki, Jon Atherton, Shan Xu, Anu Riikonen, Chao Zhang, Teemu Hakala, Eija Honkavaara, Albert Porcar-Castell
Summary: The potential of chlorophyll fluorescence and photoprotection-based indices for the detection of a wide range of nutrient contents in vegetation was investigated. Leaf-level observations showed that the relationships between these indices and foliar nutrient contents were influenced by leaf chlorophyll contents and leaf morphology. Canopy-level observations further revealed that spectral indices were also influenced by canopy structure, affecting their capacity to detect foliar nutrient contents.
Article
Plant Sciences
Albert Porcar-Castell, Zbynek Malenovsky, Troy Magney, Shari Van Wittenberghe, Beatriz Fernandez-Marin, Fabienne Maignan, Yongguang Zhang, Kadmiel Maseyk, Jon Atherton, Loren P. Albert, Thomas Matthew Robson, Feng Zhao, Jose-Ignacio Garcia-Plazaola, Ingo Ensminger, Paulina A. Rajewicz, Steffen Grebe, Mikko Tikkanen, James R. Kellner, Janne A. Ihalainen, Uwe Rascher, Barry Logan
Summary: Remote sensing methods can detect solar-induced chlorophyll a fluorescence. To fully utilize this signal, intensive cross-disciplinary work is required to harmonize biophysical and ecophysiological studies.
Proceedings Paper
Computer Science, Artificial Intelligence
Feng Zhao, Jiahao Yuan, Yanbo Huang, Troy S. Magney, Albert Porcar-Castell
IGARSS 2020 - 2020 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM
(2020)
Proceedings Paper
Computer Science, Artificial Intelligence
Shan Xu, Martha A. Zaidan, Eija Honkavaara, Teemu Hakala, Niko Viljanen, Albert Porcar-Castell, Zhigang Liu, Jon Atherton
IGARSS 2020 - 2020 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM
(2020)
Article
Environmental Sciences
Ruonan Chen, Liangyun Liu, Xinjie Liu, Zhunqiao Liu, Lianhong Gu, Uwe Rascher
Summary: This study presents methods to accurately estimate sub-daily GPP from SIF in evergreen needleleaf forests and demonstrates that the interactions among light, canopy structure, and leaf physiology regulate the SIF-GPP relationship at the canopy scale.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Daniel L. Goldberg, Madankui Tao, Gaige Hunter Kerr, Siqi Ma, Daniel Q. Tong, Arlene M. Fiore, Angela F. Dickens, Zachariah E. Adelman, Susan C. Anenberg
Summary: A novel method is applied in this study to directly use satellite data to evaluate the spatial patterns of urban NOx emissions inventories. The results show that the 108 spatial surrogates used by NEMO are generally appropriate, but there may be underestimation in areas with dense intermodal facilities and overestimation in wealthy communities.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Zhuoyue Hu, Xiaoyan Li, Liyuan Li, Xiaofeng Su, Lin Yang, Yong Zhang, Xingjian Hu, Chun Lin, Yujun Tang, Jian Hao, Xiaojin Sun, Fansheng Chen
Summary: This paper proposes a whisk-broom imaging method using a long-linear-array detector and high-precision scanning mirror to achieve high-resolution and wide-swath thermal infrared data. The method has been implemented in the SDGs satellite and has shown promising test results.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Dandan Wang, Leiqiu Hu, James A. Voogt, Yunhao Chen, Ji Zhou, Gaijing Chang, Jinling Quan, Wenfeng Zhan, Zhizhong Kang
Summary: This study evaluates different schemes for determining model coefficients to quantify and correct the anisotropic impact from remote sensing LST for urban applications. The schemes have consistent results and accurately estimate parameter values, facilitating the broadening of parametric models.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Jamie Tolan, Hung - Yang, Benjamin Nosarzewski, Guillaume Couairon, Huy V. Vo, John Brandt, Justine Spore, Sayantan Majumdar, Daniel Haziza, Janaki Vamaraju, Theo Moutakanni, Piotr Bojanowski, Tracy Johns, Brian White, Tobias Tiecke, Camille Couprie
Summary: Vegetation structure mapping is crucial for understanding the global carbon cycle and monitoring nature-based approaches to climate adaptation and mitigation. This study presents the first high-resolution canopy height maps for California and Sao Paulo, achieved through the use of very high resolution satellite imagery and aerial lidar data. The maps provide valuable tools for forest structure assessment and land use monitoring.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Regina Eckert, Steffen Mauceri, David R. Thompson, Jay E. Fahlen, Philip G. Brodrick
Summary: In this paper, a mathematical framework is proposed to improve the retrieval of surface reflectance and atmospheric parameters by leveraging the expected spatial smoothness of the atmosphere. Experimental results show that this framework can reduce the surface reflectance retrieval error and surface-related biases.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Chongya Jiang, Kaiyu Guan, Yizhi Huang, Maxwell Jong
Summary: This study presents the Field Rover method, which uses vehicle-mounted cameras to collect ground truth data on crop harvesting status. The machine learning approach and remote sensing technology are employed to upscale the results to a regional scale. The accuracy of the remote sensing method in predicting crop harvesting dates is validated through comparison with satellite data.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Oksana V. Lunina, Anton A. Gladkov, Alexey V. Bochalgin
Summary: In this study, an unmanned aerial vehicle (UAV) was used to detect and map surface discontinuities with displacements of a few centimeters, indicating the presence of initial geological deformations. The study found that sediments of alluvial fans are susceptible to various tectonic and exogenous deformational processes, and the interpretation of ultra-high resolution UAV images can help recognize low-amplitude brittle deformations at an early stage. UAV surveys are critical for discerning neotectonic activity and its related hazards over short observation periods.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Feng Zhao, Weiwei Ma, Jun Zhao, Yiqing Guo, Mateen Tariq, Juan Li
Summary: This study presents a data-driven approach to reconstruct the terrestrial SIF spectrum using measurements from the TROPOMI instrument on Sentinel-5 precursor mission. The reconstructed SIF spectrum shows improved spatiotemporal distributions and demonstrates consistency with other datasets, indicating its potential for better understanding of the ecosystem function.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Stephen Stehman, John E. Wagner
Summary: This article investigates optimal sample allocation in stratified random sampling for estimation of accuracy and proportion of area in applications where the target class is rare. The study finds that precision of estimated accuracy has a stronger impact on sample allocation than estimation of proportion of area, and the trade-offs among these estimates become more pronounced as the target class becomes rarer. The results provide quantitative evidence to guide sample allocation decisions in specific applications.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Jingyao Zheng, Tianjie Zhao, Haishen Lu, Defu Zou, Nemesio Rodriguez-Fernandez, Arnaud Mialon, Philippe Richaume, Jianshe Xiao, Jun Ma, Lei Fan, Peilin Song, Yonghua Zhu, Rui Li, Panpan Yao, Qingqing Yang, Shaojie Du, Zhen Wang, Zhiqing Peng, Yuyang Xiong, Zanpin Xing, Lin Zhao, Yann Kerr, Jiancheng Shi
Summary: Soil moisture and freeze/thaw (F/T) play a crucial role in water and heat exchanges at the land-atmosphere interface. This study reports the establishment of a wireless sensor network for soil moisture and temperature over the permafrost region of Tibetan Plateau. Satellite-based surface soil moisture (SSM) and F/T products were evaluated using ground-based measurements. The results show the reliability of L-band passive microwave SSM and F/T products, while existing F/T products display earlier freezing and later thawing, leading to unsatisfactory accuracy.
REMOTE SENSING OF ENVIRONMENT
(2024)