Filters








17 Hits in 8.7 sec

Comparative Analysis on the Estimation of Diurnal Solar-Induced Chlorophyll Fluorescence Dynamics for a Subtropical Evergreen Coniferous Forest

Jinghua Chen, Shaoqiang Wang, Bin Chen, Yue Li, Muhammad Amir, Li Ma, Kai Zhu, Fengting Yang, Xiaobo Wang, Yuanyuan Liu, Pengyuan Wang, Junbang Wang (+2 others)
2021 Remote Sensing  
In our study, we clarified the diurnal variations of leaf and canopy chlorophyll fluorescence for a subtropical evergreen coniferous forest and evaluated the performance of the canopy chlorophyll concentration  ...  Solar-induced chlorophyll fluorescence (SIF) is considered as a prospective indicator of vegetation photosynthetic activity and the ecosystem carbon cycle.  ...  Acknowledgments: The authors are grateful to the State Key Laboratory of Resources and Environmental Information System for the use of their facilities.  ... 
doi:10.3390/rs13163143 fatcat:aijxgtnlanbyjaeskga72pfor4

Evaluating Multi-Angle Photochemical Reflectance Index and Solar-Induced Fluorescence for the Estimation of Gross Primary Production in Maize

Jinghua Chen, Qian Zhang, Bin Chen, Yongguang Zhang, Li Ma, Zhaohui Li, Xiaokang Zhang, Yunfei Wu, Shaoqiang Wang, Robert A. Mickler
2020 Remote Sensing  
Over the last two decades, solar-induced fluorescence (SIF) observations from remote sensing have been used to evaluate the distribution of GPP over a range of spatial and temporal scales.  ...  The PRI-based LUE model when compared to SIF, demonstrated a higher ability to capture the diurnal dynamics of GPP (the coefficient of determination (R2) = 0.71) than the seasonal changes (R2 = 0.44),  ...  evergreen coniferous forest.  ... 
doi:10.3390/rs12172812 fatcat:zitamejd55bizp5lh63rv2z7lm

Satellite observations reveal seasonal redistribution of northern ecosystem productivity in response to interannual climate variability

Zachary Butterfield, Wolfgang Buermann, Gretchen Keppel-Aleks
2020 Remote Sensing of Environment  
for productivity including solar-induced chlorophyll fluorescence (SIF) and the near-infrared reflectance of vegetation (NIR v ).  ...  In response to these inconsistencies, we applied a statistical method on regionally aggregated productivity data in four selected North American ecoregions and identified two dominant modes of IAV-seasonal  ...  We thank three anonymous reviewers for their constructive and detailed comments that strengthened the manuscript.  ... 
doi:10.1016/j.rse.2020.111755 fatcat:nokemtniqrgj5ail6qtzecwfz4

Terrestrial ecosystem model studies and their contributions to AsiaFlux

Akihiko ITO, Kazuhito ICHII
2021 Journal of Agricultural Meteorology  
A wide variety of models have been developed and used in studies of land-atmosphere interactions and the carbon cycle, with aims of data integration, sensitivity analysis, interpolation, and extrapolation  ...  This review summarizes the achievements of model studies conducted in Asia, a focal region in the changing Earth system, especially collaborative works with the regional flux measurement network, AsiaFlux  ...  Acknowledgements This study was supported by funds provided by a Japan Society for the Promotion of Science KAKENHI grant (no. 17H01867), the Environmental Research Fund (JPMEERF20172010) of the Ministry  ... 
doi:10.2480/agrmet.d-20-00024 fatcat:wbytwszntrhnlf2ooovyhsvpcm

Estimating global gross primary productivity using chlorophyll fluorescence and a data assimilation system with the BETHY-SCOPE model

Alexander J. Norton, Peter J. Rayner, Ernest N. Koffi, Marko Scholze, Jeremy D. Silver, Ying-Ping Wang
2019 Biogeosciences  
</strong> This paper presents the assimilation of solar-induced chlorophyll fluorescence (SIF) into a terrestrial biosphere model to estimate the gross uptake of carbon through photosynthesis (GPP).  ...  the global distribution of productivity relative to independent estimates, but a large difference in magnitude.  ...  Recent remote sensing measurements of solar-induced chlorophyll fluorescence (SIF) (Frankenberg et al., 2011b; Joiner et al., 2011) offer a novel insight into the spatiotemporal patterns of GPP (e.g.  ... 
doi:10.5194/bg-16-3069-2019 fatcat:xpxuold4uffvnkur2bsuzxrlmm

Remote sensing of ecosystem services: An opportunity for spatially explicit assessment

Xiaoming Feng, Bojie Fu, Xiaojun Yang, Yihe Lü
2010 Chinese Geographical Science  
Thus, remote sensing can be useful for quantitative assessment of ecosystem services.  ...  Ecosystem service is an emerging concept that grows to be a hot research area in ecology. Spatially explicit ecosystem service values are important for ecosystem service management.  ...  Damm et al. (2010) shows for the first time that including sun induced fluorescence in the LUE model improves the prediction of diurnal courses of GPP.  ... 
doi:10.1007/s11769-010-0428-y fatcat:adhqrq2qjrg7hmqnlxiyez34om

Overview: Recent advances in the understanding of the northern Eurasian environments and of the urban air quality in China – a Pan-Eurasian Experiment (PEEX) programme perspective

Hanna K. Lappalainen, Tuukka Petäjä, Timo Vihma, Jouni Räisänen, Alexander Baklanov, Sergey Chalov, Igor Esau, Ekaterina Ezhova, Matti Leppäranta, Dmitry Pozdnyakov, Jukka Pumpanen, Meinrat O. Andreae (+61 others)
2022 Atmospheric Chemistry and Physics  
The Pan-Eurasian Experiment (PEEX) Science Plan, released in 2015, addressed a need for a holistic system understanding and outlined the most urgent research needs for the rapidly changing Arctic-boreal  ...  hindering a comprehensive system analysis.  ...  We thank the following funding agencies and projects: Academy of Finland contract nos. 280700, 294600,  ... 
doi:10.5194/acp-22-4413-2022 fatcat:jj4qjncypjetrknxa4quv2kt5m

A Multi-Scale Assessment of Solar-Induced Chlorophyll Fluorescence and Its Relation to Northern Hemisphere Forest Productivity

Zachary Butterfield, University, My
2021
Remote sensing represents one method to observe vegetation properties and processes, and solar-induced chlorophyll fluorescence (SIF), a light signal originating from leaves, has been shown to be proportional  ...  for robust studies of IAV at scales comparable to [...]  ...  for productivity including solar-induced chlorophyll fluorescence (SIF) and the near-infrared reflectance of vegetation (NIRv) .  ... 
doi:10.7302/1438 fatcat:wxaooq5fyzdelony77od4l4iyy

A bacterial bioreporter panel to assay the cytotoxicity of atmospheric particulate matter

Nivi Kessler, James J. Schauer, Sharon Yagur-Kroll, Sahar Melamed, Ofir Tirosh, Shimshon Belkin, Yigal Erel
2012 Atmospheric Environment  
Bioavailability analysis of the samples suggests that chromium was related to the toxic responses induced by two of the CFA samples.  ...  The analysis was performed on a total of 56898 single particle mass spectra allowing the extraction of 10 factors, their temporal trends and size distributions, named CNO-COOH (cyanide, oxidised organic  ...  For each tree type, a regression model was fitted to explain the variation in LA, LDW, SLA, RCC and chlorophyll fluorescence parameters by leaf SIRM.  ... 
doi:10.1016/j.atmosenv.2012.09.048 fatcat:io4k5yahovcgvgzpnrxd6mynym

A starting guide to root ecology: strengthening ecological concepts and standardising root classification, sampling, processing and trait measurements

Grégoire T Freschet, Loïc Pagès, Colleen M Iversen, Louise H Comas, Boris Rewald, Catherine Roumet, Jitka Klimešová, Marcin Zadworny, Hendrik Poorter, Johannes A Postma, Thomas S Adams, Agnieszka Bagniewska-Zadworna (+28 others)
2021 New Phytologist  
In the context of a recent massive increase in research on plant root functions and their impact on the environment, root ecologists currently face many important challenges to keep on generating cutting-edge  ...  multiple aspects of root study and create favourable conditions for the inception of comprehensive experiments on the role of roots in plant and ecosystem functioning.  ...  Acknowledgements We thank the many anonymous reviewers on this manuscript, as well as Philipp Grande, Richard van Logtestijn and Joana Bergmann for commenting on specific aspects of this manuscript.  ... 
doi:10.1111/nph.17572 pmid:34608637 pmcid:PMC8518129 fatcat:pa3bniqtjram5ckck3vt5zwotu

Temporal dynamics and leaf trait variability in Neotropical dry forests

Michael S Hesketh
2014
In chapter two, I present a review of the use of remote sensing analysis for the evaluation of Neotropical dry forests.  ...  this variability must play a central role in the establishment of monitoring techniques for dry forests.  ...  Retrieval of leaf area index for a coniferous forest by inverting a forest reflectance model.  ... 
doi:10.7939/r33j3973r fatcat:oxampocfgjetlpznvydpxxqate

EFFECTS OF N FERTILIZATION ON FOREST TREES AND ECOSYSTEMS: WATER USE, WUE, GROWTH Coordinatore Dottorato Relatore

Presentata, Dott Ssa, Qiran Zhang, Giovanni Dinelli, Federico Magnani
unpublished
A Al lm ma a M Ma at te er r S St tu ud di io or ru um m-U Un ni iv ve er rs si it tà à d di i B Bo ol lo og gn na a DOTTORATO DI RICERCA IN Scienze e Tecnologie Agrarie, Ambientali e Alimentari Ciclo  ...  N % : leaf N concentration; N a : leaf N content; SLA: specific leaf area; A max : maximum assimilation rate; g s : stomatal conductance; ITE: intrinsic water-use efficiency; Estimate ITE: estimated intrinsic  ...  at P < 0.05 and NS indicates the values do not differ significantly according to the least significant difference test (P > 0.05).  ... 
fatcat:xho2esnvondu7goxl4st25l5l4

Monitoring Seasonal and Secondary Succession Processes in Deciduous Forests using Near-Surface Optical Remote Sensing and Wireless Sensor Networks

Cassidy J Rankine
2016
The goal of this thesis is to address the need for improved monitoring of forest ecosystem dynamics in the context of anthropogenic global change by proposing the use of near-surface optical remote sensing  ...  forest canopy photosynthetic dynamics.  ...  ACKNOWLEDGEMENTS This chapter was submitted to the scientific journal Remote Sensing of Environment (IF 6.39 2014) in July 2015 and is under peer review at the time of this thesis completion.  ... 
doi:10.7939/r32z12v30 fatcat:7nsnwictz5e4hlh5ardzzmbrme

Modeling the impacts of recent climate change on ecosystem productivity across North America

Zelalem A Mekonnen
2015
In this study, a comprehensive mathematical process model, ecosys, was used to estimate the impacts of climate change and major droughts of the last three decades (1979 -2010) on ecosystem productivity  ...  The impacts of these changes on land-atmosphere carbon exchange over a wide range of biomes are spatially heterogeneous and uncertain.  ...  In recent developments, solar-induced chlorophyll fluorescence (SFI), has been used to measured carbon uptake (Frankenberg et al., 2014; Guanter et al., 2014) and can potentially be used to test modeled  ... 
doi:10.7939/r3v11vt6b fatcat:ylzxnss3j5avjm6xoqmr3zedbi

Proceedings of the 10th International Conference on Ecological Informatics: translating ecological data into knowledge and decisions in a rapidly changing world: ICEI 2018

International Conference On Ecological Informatics, Thüringer Universitäts- Und Landesbibliothek Jena, Jitendra Gaikwad
2018
The Conference Proceedings are an impressive display of the current scope of Ecological Informatics.  ...  learning and process modelling, • decision-informing solutions for biodiversity conservation and sustainable ecosystem management in light of global changes.  ...  reduce competition in a subtropical forest?  ... 
doi:10.22032/dbt.37846 fatcat:abpbnzmatncp7piugi3udxzcxu
« Previous Showing results 1 — 15 out of 17 results