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Identifying multiple spatiotemporal patterns: A refined view on terrestrial photosynthetic activity

Miguel D. Mahecha, Lina M. Fürst, Nadine Gobron, Holger Lange
2010 Pattern Recognition Letters  
The approach is exemplified using global remote sensing estimates of photosynthetic activity. A wide range of partly well interpretable gradients is retrieved.  ...  Second, these characteristic temporal patterns induce multiple geographical gradients.  ...  LMF and MDM thank the Max Planck Society for supporting the Max Planck research group on ''Biogeochemical Model-Data Integration".  ... 
doi:10.1016/j.patrec.2010.06.021 fatcat:m66v7hqr2rg2vnyqixni3na7gi

AMOUNT OR PATTERN? GRASSLAND RESPONSES TO THE HETEROGENEITY AND AVAILABILITY OF TWO KEY RESOURCES

Fernando T. Maestre, James F. Reynolds
2007 Ecology  
Patterns of resource availability and heterogeneity shape the composition, productivity, and dynamics of plant assemblages in a wide variety of terrestrial ecosystems.  ...  Our study demonstrates that considering the interactions between resource availability and heterogeneity allows for a refinement of predictions that can detectably reduce the error associated with extrapolating  ...  Quero, and Anne Rosenbarger for their help in the laboratory, Adria´n Escudero for his help with GLM analyses, and two anonymous reviewers for comments on a previous version of the manuscript. F. T.  ... 
doi:10.1890/06-0421 pmid:17479767 fatcat:gdjrwortdremdap3hkczi43txq

A tree-ring perspective on the terrestrial carbon cycle

Flurin Babst, M. Ross Alexander, Paul Szejner, Olivier Bouriaud, Stefan Klesse, John Roden, Philippe Ciais, Benjamin Poulter, David Frank, David J. P. Moore, Valerie Trouet
2014 Oecologia  
A tree-ring perspective on the terrestrial carbon cycle." Oecologia 176(2): 307-322. http://dx. Abstract  ...  Oxygen isotope variation is viewed as a measure of evaporative flux as it depends on stomatal conductance, but less directly on photosynthetic rates. this dual approach has successfully been used to interpret  ...  A tree-ring perspective on the terrestrial carbon cycle Introduction Forest growth is one of the key processes that need to be assessed at a global scale to understand and quantify the Tree-ring records  ... 
doi:10.1007/s00442-014-3031-6 pmid:25119160 fatcat:vfenzq2j4zffnku7ncykktuvcu

Process-based analysis of terrestrial carbon flux predictability

István Dunkl, Aaron Spring, Pierre Friedlingstein, Victor Brovkin
2021 Earth System Dynamics  
Despite efforts to decrease the discrepancy between simulated and observed terrestrial carbon fluxes, the uncertainty in trends and patterns of the land carbon fluxes remains high.  ...  Our results reveal the crucial regions and ecosystem processes to be considered when initializing a carbon prediction system.  ...  Conclusions In this study, we take a closer look at spatiotemporal patterns of terrestrial CFpred and identify the climatic and environmental sources of predictability and the feedback mechanisms prolonging  ... 
doi:10.5194/esd-12-1413-2021 fatcat:ru4j4i6hf5azzlqkf3t54kz2ta

A double peak in the seasonality of California's photosynthesis as observed from space

Alexander J. Turner, Philipp Köhler, Troy S. Magney, Christian Frankenberg, Inez Fung, Ronald C. Cohen
2020 Biogeosciences  
We further decompose the spatiotemporal patterns in the SIF data based on land cover.  ...  The EOF analysis further indicates that two spatiotemporal patterns explain 84 % of the variability in the SIF data.  ...  The downscaling method further refines the high-resolution spatial patterns by bringing in a priori information on the subgrid vegetation patterns.  ... 
doi:10.5194/bg-17-405-2020 fatcat:blckdq5gcjccpabyp327ybjuse

How is water-use efficiency of terrestrial ecosystems distributed and changing on Earth?

Xuguang Tang, Hengpeng Li, Ankur R. Desai, Zoltan Nagy, Juhua Luo, Thomas E. Kolb, Albert Olioso, Xibao Xu, Li Yao, Werner Kutsch, Kim Pilegaard, Barbara Köstner (+1 others)
2014 Scientific Reports  
One peak is located at 206 , 306N and the other extends a little farther north than 516N.  ...  Finally, long-term spatiotemporal trend analysis using satellite-based remote sensing data reveals that land-cover and land-use change in recent years has led to a decline in global WUE.  ...  A large number of technicians, graduate and doctoral students are acknowledged for help in site management, data collection and elaboration. We also thank the group of Prof.  ... 
doi:10.1038/srep07483 pmid:25500908 pmcid:PMC4265788 fatcat:6mklj2e67bcvbptplexs64pv3m

Ecogeographically and Non-Ecogeographically Forecasting Discontinuous Canopied Simulium damnosum s.l. Habitats by Interpolating Metrizable Sub-Mixel Mean Solar Exoatmospheric Quantum Scalar Irradiance where θi is a Zenith Angle and Diatomically Etiolated Xanthophylls with Azimutually Isotropic Sources of Chloroplastic Carotenoid Zeaxanthins Spectrally Extracted from a Decomposed RapidEye™ Red Edge Normalized Difference Vegetation Index Reference Targeted Biosignature: A Case Study in Burkina Faso and Uganda

Benjamin G. Jacob, Robert J.Novak
2015 Journal of Remote Sensing & GIS  
Rather than relying on a single method of vector control (e.g chemical spraying), IVM stresses the importance of first understanding the local vector ecology and local patterns of disease transmission,  ...  Multiple, deterministic approaches based on diverse representations of light interactions with canopy plant leaves have been developed in ArcGIS [2].  ...  every day (e.g., moderate-resolution imaging spectrometer) or, modeled irradiances computed for nadir view on active sensors or, on a sun-synchronous orbit such as Cloud-Aerosol Lidar, Infrared Pathfinder  ... 
doi:10.4172/2469-4134.1000152 fatcat:gpqnvnehhvfchajg3rx5i6hije

The riverine ecosystem synthesis: biocomplexity in river networks across space and time

James H. Thorp, Martin C. Thoms, Michael D. Delong
2006 Rivers Research and Applications: an international journal devoted to river research and management  
Rather than posing a completely new model, we arrange a conceptual marriage of eco-geomorphology (ecological aspects of fluvial geomorphology) with a terrestrial landscape model describing hierarchical  ...  A lucid and widely accepted understanding of how most ecosystems are naturally regulated has eluded terrestrial and aquatic ecologists.  ...  Our manuscript benefitted from comments by Bernhard Statzner, Wolfgang Junk, and others at a workshop on river ecology (Kerner von Marilaun Workshop on Long Term Ecological Research) in Austria during  ... 
doi:10.1002/rra.901 fatcat:cifxh3scwvb7dnqt3zlatljtju

Greenness indices from digital cameras predict the timing and seasonal dynamics of canopy-scale photosynthesis

Michael Toomey, Mark A. Friedl, Steve Frolking, Koen Hufkens, Stephen Klosterman, Oliver Sonnentag, Dennis D. Baldocchi, Carl J. Bernacchi, Sebastien C. Biraud, Gil Bohrer, Edward Brzostek, Sean P. Burns (+12 others)
2015 Ecological Applications  
577 dynamics on the carbon cycle of terrestrial ecosystems.  ...  This 384 pattern was not observed at the Wind River site, which was photosynthetically active throughout 385 almost the whole year (Appendix B).  ... 
doi:10.1890/14-0005.1 pmid:26255360 fatcat:xc2heclysfgg3hwaqk7pmhdslq

Assessing Non-Photosynthetic Cropland Biomass from Spaceborne Hyperspectral Imagery

Katja Berger, Tobias Hank, Andrej Halabuk, Juan Pablo Rivera-Caicedo, Matthias Wocher, Matej Mojses, Katarina Gerhátová, Giulia Tagliabue, Miguel Morata Dolz, Ana Belen Pascual Venteo, Jochem Verrelst
2021 Remote Sensing  
Non-photosynthetic vegetation (NPV) biomass has been identified as a priority variable for upcoming spaceborne imaging spectroscopy missions, calling for a quantitative estimation of lignocellulosic plant  ...  To demonstrate mapping capability, the NPV-GPR model was tested on a PRISMA hyperspectral image acquired over agricultural areas in the North of Munich, Germany.  ...  , www.cost.eu (accessed on 22 September 2021)).  ... 
doi:10.3390/rs13224711 pmid:36082004 pmcid:PMC7613388 fatcat:b4mt7ijufbfkphs5oa3whqacxe

Evaluating the role of land cover and climate uncertainties in computing gross primary production in Hawaiian Island ecosystems

Heather L. Kimball, Paul C. Selmants, Alvaro Moreno, Steve W. Running, Christian P. Giardina, Benjamin Poulter
2017 PLoS ONE  
Our sensitivity analyses within a heterogeneous tropical landscape suggest that refined global land cover and climate data sets may contribute to an enhanced MOD17 product at a variety of spatial scales  ...  Gross primary production (GPP) is the Earth's largest carbon flux into the terrestrial biosphere and plays a critical role in regulating atmospheric chemistry and global climate.  ...  To calculate absorbed photosynthetically active radiation (APAR), the MOD17 PSN algorithm multiplies fAPAR by estimates of incident photosynthetically active radiation (PAR) from NASA GMAO (version 5.9.1  ... 
doi:10.1371/journal.pone.0184466 pmid:28886187 pmcid:PMC5590934 fatcat:s4ooebh5lbh53lrqzbk4q754q4

Development of an open-source regional data assimilation system in PEcAn v. 1.7.2: application to carbon cycle reanalysis across the contiguous US using SIPNET

H. Dokoohaki, B. D. Morrison, A. Raiho, S. P. Serbin, K. Zarada, L. Dramko, M. Dietze
2022 Geoscientific Model Development  
In this study, we introduce a new terrestrial carbon cycle data assimilation system, built on the PEcAn model–data eco-informatics system, and its application for the development of a proof-of-concept  ...  The ability to monitor, understand, and predict the dynamics of the terrestrial carbon cycle requires the capacity to robustly and coherently synthesize multiple streams of information that each provide  ...  The PEcAn project is supported by the NSF (ABI no. 1062547, ABI no. 1458021, DIBBS no. 1261582), NASA Terrestrial Ecosystems, the Energy Biosciences Institute, and an Amazon AWS education grant.  ... 
doi:10.5194/gmd-15-3233-2022 doaj:f3d2bfffd6c2479187002f5b624f4717 fatcat:4eneospd2fblhbabrerzequ6dq

Recent trends and remaining challenges for optical remote sensing of Arctic tundra vegetation: A review and outlook

Alison Beamish, Martha K. Raynolds, Howard Epstein, Gerald V. Frost, Matthew J. Macander, Helena Bergstedt, Annett Bartsch, Stefan Kruse, Victoria Miles, Cemal Melih Tanis, Birgit Heim, Matthias Fuchs (+4 others)
2020 Remote Sensing of Environment  
A B S T R A C T A systematic review and inventory of recent research relating to optical remote sensing of Arctic vegetation was conducted, and thematic and geographical trends were summarized.  ...  The second are issues of upscaling and extrapolation related to sensor physics and the comparability of data from multiple spatial, spectral, and temporal resolutions.  ...  This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 689443 via project iCUPE (Integrative and Comprehensive Understanding on  ... 
doi:10.1016/j.rse.2020.111872 fatcat:gpprd3is7ff33fhtuh4go7nu44

Increasing the spatial and temporal impact of ecological research: A roadmap for integrating a novel terrestrial process into an Earth system model

Emily Kyker‐Snowman, Danica L. Lombardozzi, Gordon B. Bonan, Susan J. Cheng, Jeffrey S. Dukes, Serita D. Frey, Elin M. Jacobs, Risa McNellis, Joshua M. Rady, Nicholas G. Smith, R. Quinn Thomas, William W. Wieder (+1 others)
2021 Global Change Biology  
First, we highlight the multiple ways that ecological observations and modeling iteratively strengthen one another, dispelling the illusion that the ecologist's role ends with initial provision of data  ...  Despite this mutualism, meaningfully integrating the two remains a persistent challenge, in part because of logistical obstacles in translating processes into mathematical formulas and identifying ways  ...  All of these activities rely on conducting simulations across multiple study sites and at global scales, which is a valuable precursor to considering incorporating MIMICS into an ESM. models) to achieve  ... 
doi:10.1111/gcb.15894 pmid:34543495 pmcid:PMC9293342 fatcat:7q3uqp653vfhrahi6p7wmgchjy

Widespread decline of Congo rainforest greenness in the past decade

Liming Zhou, Yuhong Tian, Ranga B. Myneni, Philippe Ciais, Sassan Saatchi, Yi Y. Liu, Shilong Piao, Haishan Chen, Eric F. Vermote, Conghe Song, Taehee Hwang
2014 Nature  
We use (1) rainfall, terrestrial water storage (TWS), aerosol optical thickness (AOT), cloud optical thickness (COT), photosynthetically active radiation (PAR) and land surface temperature (LST) as climate  ...  It is also consistent with increases in photosynthetically active radiation and land surface temperature.  ... 
doi:10.1038/nature13265 pmid:24759324 fatcat:plqmgwsalfaefk3753irikk2gi
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