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Potential gross primary productivity of terrestrial vegetation from 1982-1990
1995
Geophysical Research Letters
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., unstressed) gross primary productivity of terrestrial vegetation from 1982 to 1990. ...
The evolution of monthly gross primary productivity anomahes was similar to atmospheric CO2 growth rate during 1982-1990. ...
standard deviation ' mean) of gross primary production from 1982-1990. ...
doi:10.1029/95gl02562
fatcat:xk47aks2pvedvb3iviiony5hzy
Prospects for improving savanna biophysical models by using multiple-constraints model-data assimilation methods
2005
Australian Journal of Botany
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Retrieval of model parameters and initial conditions by the assimilation scheme, using only one data type, led to poor representation of modelled plant-canopy production and ecosystem respiration fluxes ...
Application of these techniques will not only help fill knowledge gaps in the carbon and water dynamics of savannas but will result in better information for decision support systems to solve natural-resource ...
Acknowledgments The authors thank Ying Ping Wang ...
doi:10.1071/bt04139
fatcat:zozcq6mr7jfmhgjxw2m5nbhxdq
Global Validation of a Process-Based Model on Vegetation Gross Primary Production Using Eddy Covariance Observations
2014
PLoS ONE
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Gross Primary Production (GPP) is the largest flux in the global carbon cycle. However, large uncertainties in current global estimations persist. ...
Global mean GPP estimated by the IBIS model was 107.5061.37 Pg C year 21 (mean value 6 standard deviation) across the vegetated area for the period 2000-2006, consistent with the results of the EC-LUE ...
Acknowledgments This work used eddy covariance data acquired by the FLUXNET community; in particular, by the following networks: AmeriFlux (U.S. ...
doi:10.1371/journal.pone.0110407
pmid:25375227
pmcid:PMC4222824
fatcat:gpm3tbwjerfufgfyun5z5zblia
First assessment of the plant phenology index (PPI) for estimating gross primary productivity in African semi-arid ecosystems
[article]
2019
arXiv
pre-print
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We developed a PPI-based model estimating gross primary productivity (GPP) that accounts for canopy water stress, and compared it against three other Earth observation-based GPP models: the temperature ...
The results of this study show that a PPI-based GPP model is a promising tool for the estimation of GPP in the semi-arid ecosystems of Africa. ...
The authors would like to thank the reviewers for their time in providing detailed and constructive comments that improved the quality of the manuscript. ...
arXiv:1902.08058v1
fatcat:jt67qo3t3rfgtfbk3iiu7vohte
Optimum temperature for photosynthesis: from leaf- to ecosystem-scale
2020
Science Bulletin
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Acknowledgments This work was supported by the National Natural Science Foundation of China (41701089) and the Youth Innovation Promotion Association, Chinese Academy of Sciences, China (2019074). ...
This work used eddy covariance measurement datasets of half-hourly gross primary productivity along with half-hourly air temperature observations, satellite-derived proxies of gross primary productivity ...
Here, the daytime air temperature is represented by daily maximum air temperature, and the gross primary productivity is represented by dailyaccumulated gross primary productivity. ...
doi:10.1016/j.scib.2020.01.006
fatcat:qllvdfklxjdkbcdokzsgki34i4
Simultaneous assimilation of satellite and eddy covariance data for improving terrestrial water and carbon simulations at a semi-arid woodland site in Botswana
2012
Biogeosciences Discussions
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The mean uncertainty reduction (relative to the prior) over all parameters is 14.9 % for the simultaneous assimilation of LHF and FAPAR, 8.5 % for assimilating LHF only, and 6.1 % for assimilating FAPAR ...
Here, we use the Carbon Cycle Data Assimilation System (CCDAS) to investigate the key parameters controlling ecological and hydrological activities for a semi-arid savanna woodland site in Maun, Botswana ...
This study was supported by the Postdoctoral Fellowships for Research Abroad, Japan Society for the Promotion of Science, the Ministry of Education, Science, Culture, Sports and Technology of Japan, and ...
doi:10.5194/bgd-9-3615-2012
fatcat:tttxui3h7zaklmjw7dqsocfemi
Seasonal variation of carbon fluxes in a sparse savanna in semi arid Sudan
2008
Carbon Balance and Management
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This causes large variability in net ecosystem exchange and in vegetation productivity, the subsistence basis for a major part of the rural population in Sahel. ...
of the carbon budget of this grass land/sparse savanna site in semi arid Sudan. ...
Acknowledgements Economic support was provided by the Swedish Science Council (ref. no. 2004-3888) and by EU through the CARBOAFRICA project. ...
doi:10.1186/1750-0680-3-7
pmid:19046418
pmcid:PMC2632635
fatcat:y6hfuxs3e5fxdo4a2fvl746cbe
MODIS vegetation products as proxies of photosynthetic potential along a gradient of meteorologically and biologically driven ecosystem productivity
2016
Biogeosciences
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satellite products, including VIs, gross primary productivity (GPP<sub>MOD</sub>), leaf area index (LAI<sub>MOD</sub>), and fraction of photosynthetic active radiation (fPAR<sub>MOD</sub>). ...
</strong> A direct relationship between gross ecosystem productivity (GEP) estimated by the eddy covariance (EC) method and Moderate Resolution Imaging Spectroradiometer (MODIS) vegetation indices (VIs ...
We show our respect and acknowledge the people, the traditional custodians of the land, of elders past and present of the Arrernte nation at Alice Springs, the Wiradjuri people at Tumbarumba, the Meru ...
doi:10.5194/bg-13-5587-2016
fatcat:4wjo5ip5urdjjjsfueytxt7cgy
A continuous measure of gross primary production for the conterminous United States derived from MODIS and AmeriFlux data
2010
Remote Sensing of Environment
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Our GPP estimates provide a spatially and temporally continuous measure of gross primary production for the U.S. that is a highly constrained by eddy covariance flux data. ...
With these estimates, we then examined the patterns, magnitude, and interannual variability of GPP. We estimated a gross carbon uptake between 6.91 and 7.33 Pg C yr − 1 for the conterminous U.S. ...
Acknowledgements This research was partly supported by the National Science Foundation (NSF) Carbon and Water Program (EAR-0630319). We ...
doi:10.1016/j.rse.2009.10.013
fatcat:duxinq4ccnarzbxuslay6o6rq4
Variability and recent trends in the African terrestrial carbon balance
2009
Biogeosciences
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The land use flux alone is estimated to be a source of 0.13 Pg C yr −1 caused by deforestation. ...
Overall, we found that the African net terrestrial carbon balance (Net Biome Productivity, NBP) increased from a net CO 2 source to the atmosphere of 0.14 Pg C yr −1 in the 1980s to a net sink of 0.15 ...
Piao was supported by the Foundation for the Author of National Excellent Doctoral Dissertation of PR China (FANEDD-200737). Edited by: J. ...
doi:10.5194/bg-6-1935-2009
fatcat:pjljf2srb5cmhlihiyyusyjw2m
Simultaneous assimilation of satellite and eddy covariance data for improving terrestrial water and carbon simulations at a semi-arid woodland site in Botswana
2013
Biogeosciences
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The mean uncertainty reduction (relative to the prior) over all parameters is 14.9% for the simultaneous assimilation of LHF and FAPAR, 8.5% for assimilating LHF only, and 6.1% for assimilating FAPAR only ...
Here, we use the Carbon Cycle Data Assimilation System (CCDAS) to investigate the key parameters controlling ecological and hydrological activities for a semi-arid savanna woodland site in Maun, Botswana ...
This study was supported by the Postdoctoral Fellowships for Research Abroad, Japan Society for the Promotion of Science, the Ministry of Education, Science, Culture, Sports and Technology of Japan, and ...
doi:10.5194/bg-10-789-2013
fatcat:zps7wqbbkvdyhfvg4w7rgbg77a
Estimation of gross primary production over the terrestrial ecosystems in China
2013
Ecological Modelling
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However, a high proportion of sparsely vegetated area in China resulted in the overall low GPP. ...
The inter-annual variability in GPP was significantly influenced by air temperature (R 2 = 0.66, P < 0.05), precipitation (R 2 = 0.71, P < 0.05), and normalized difference vegetation index (NDVI) (R 2 ...
We also acknowledge the Coordinated Observations and Integrated Research over Arid and Semi-arid China (COIRAS) (lead by Key Laboratory of Regional Climate-Environment Research for the Temperate East Asia ...
doi:10.1016/j.ecolmodel.2013.03.024
fatcat:fr5gstwdc5c4hc7geqmomtsabm
Evaluation of satellite based indices for gross primary production estimates in a sparse savanna in the Sudan
2009
Biogeosciences
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One of the more frequently applied methods for integrating controls on primary production through satellite data is the Light Use Efficiency (LUE) approach. ...
Results show a strong correlation between vegetation indices and gross primary production (GPP), demonstrating the significance of vegetation indices for deriving information on primary production with ...
We appreciate the assistance from the Agricultural Research Corporation (ARC) personnel in El Obeid and the assistance from the people of Demokeya during fieldwork. ...
doi:10.5194/bg-6-129-2009
fatcat:fxk3e2d6wra5zmhfwlatyf3aly
Joint control of terrestrial gross primary productivity by plant phenology and physiology
2015
Proceedings of the National Academy of Sciences of the United States of America
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Terrestrial gross primary productivity (GPP) varies greatly over time and space. ...
The variability in carbon sequestration is partially caused by variation in terrestrial gross primary productivity (GPP) (2), which is the cumulative rate over time of gross plant Significance Terrestrial ...
We thank the anonymous reviewers and Steven Running for their constructive comments and suggestions, and Lianhong Gu and Ying-Ping Wang for their help in data analyses. ...
doi:10.1073/pnas.1413090112
pmid:25730847
pmcid:PMC4352779
fatcat:24txdk34qvb4fl6glc5lxj7yey
Variability and recent trends in the African carbon balance
2008
Biogeosciences Discussions
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The main spatial pattern of interannual variability in NBP and in gross carbon fluxes is related with ENSO, with dryer conditions prevailing over 15 savannas during El Niño and wetter conditions over forests ...
Overall, we found 5 that the African net carbon balance (Net Biome Productivity, NBP) increased from a net carbon source of −0.14 Pg C yr −1 in the 1980s to a net carbon sink of 0.15 Pg C yr −1 in the ...
Mougin for their very ...
doi:10.5194/bgd-5-3497-2008
fatcat:tohnruy2ybgr5bpqzcdijnexca
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