Results 11 to 20 of about 3,482,440 (295)

Mapping the net ecosystem exchange of CO2 of global terrestrial systems

International Journal of Applied Earth Observations and Geoinformation, 2023
Net ecosystem exchange of CO2 (NEE) is a useful tool to analyze the carbon balance of different areas. Since it is impossible to measure NEE in-situ at a regional or global scale, this study has conducted a NEE estimation model to map the NEE of global ...
Yi Lian, Haixiao Li, Qianqian Renyang, Le Liu, Jiankang Dong, Xiaoning Liu, Zihan Qu, Lien-Chieh Lee, Lei Chen, Dongliang Wang, Hu Zhang   +10 more
doaj   +2 more sources

Net ecosystem carbon exchange of a dry temperate eucalypt forest [PDF]

Biogeosciences, 2017
Forest ecosystems play a crucial role in the global carbon cycle by sequestering a considerable fraction of anthropogenic CO2, thereby contributing to climate change mitigation. However, there is a gap in our understanding about the carbon dynamics of
N. Hinko-Najera, P. Isaac, J. Beringer, E. van Gorsel, C. Ewenz, I. McHugh, J.-F. Exbrayat, S. J. Livesley, S. K. Arndt   +8 more
doaj   +6 more sources

Uncertainty analysis of gross primary production partitioned from net ecosystem exchange measurements [PDF]

Biogeosciences, 2016
Gross primary production (GPP) can be separated from flux tower measurements of net ecosystem exchange (NEE) of CO2. This is used increasingly to validate process-based simulators and remote-sensing-derived estimates of simulated GPP at various time ...
R. Raj, N. A. S. Hamm, C. V. D. Tol, A. Stein   +3 more
doaj   +2 more sources

On the separation of net ecosystem exchange into assimilation and ecosystem respiration: review and improved algorithm

Global Change Biology, 2005
This paper discusses the advantages and disadvantages of the different methods that separate net ecosystem exchange (NEE) into its major components, gross ecosystem carbon uptake (GEP) and ecosystem respiration (Reco).
Ourcival Jean-Marc, Janous Dalibor, Grunwald Thomas, Knohl Alexander, Sanz Maria, Seufert Gunther, Granier Andre, Falge Eva, Lohila Annalea, Rambal Serge, Aubinet Marc, Rotenberg Eyal, Matteucci Giorgio, Papale Dario, Gilmanov Tagir, Miglietta Franco, Havrankova Katka, Yakir Dan, Valentini Riccardo, Vesala Timo, Baldocchi Dennis, Bernhofer Christian, Vaccari Francesco, Berbigier Paul, Pumpanen Jukka, Ilvesniemi Hannu, Loustau Denis, Tenhunen John, Reichstein Markus, Meyers Tilden, Laurila Tuomas, Buchmann Nina   +31 more
core   +8 more sources

Hysteresis response of daytime net ecosystem exchange during drought [PDF]

Biogeosciences, 2010
Continuous measurements of net ecosystem CO₂ exchange (NEE) using the eddy-covariance method were made over an agricultural ecosystem in the southeastern US.
N. Pingintha, M. Y. Leclerc, J. P. Beasley Jr., D. Durden, G. Zhang, C. Senthong, D. Rowland   +6 more
doaj   +4 more sources

Explainable machine learning for modeling of net ecosystem exchange in boreal forests [PDF]

Biogeosciences, 2023
There is a growing interest in applying machine learning methods to predict net ecosystem exchange (NEE) based on site information and climatic variables.
E. Ezhova, T. Laanti, A. Lintunen, P. Kolari, T. Nieminen, I. Mammarella, K. Heljanko, K. Heljanko, M. Kulmala   +8 more
doaj   +7 more sources

Sensitivity of net ecosystem exchange and heterotrophic respiration to parameterization uncertainty [PDF]

Journal of Geophysical Research: Atmospheres, 2013
We examine the uncertainty in net ecosystem exchange due to the model treatment of heterotrophic respiration in a variety of hydroclimatic conditions using a land surface model.
Pitman, AJ ; https://orcid.org/, Wang, Y, Exbrayat, JF, Exbrayat, J, Wang, YP ; https://orcid.org/, Pitman, Andrew, Abramowitz, G ; https://orcid.org/, Abramowitz, Gabriel   +7 more
core   +4 more sources

Grazing decreases net ecosystem carbon exchange by decreasing shrub and semi‐shrub biomass in a desert steppe [PDF]

Ecology and Evolution
Livestock grazing can strongly determine how grasslands function and their role in the carbon cycle. However, how ecosystem carbon exchange responds to grazing and the underlying mechanisms remain unclear.
Xin Ju, Bingying Wang, Lianhai Wu, Xiaojia Zhang, Qian Wu, Guodong Han   +5 more
doaj   +2 more sources

The impact of chamber transparency on estimation of peatland net ecosystem exchange [PDF]

ITM Web of Conferences, 2018
The purpose of this work was to quantify the variation of chamber transparency over the period of one month of measurements and its impact on estimates of peatland net ecosystem exchange.
Stróżecki Marcin, Rastogi Anshu, Juszczak Radosław   +2 more
doaj   +2 more sources

Upscaling Net Ecosystem Exchange Over Heterogeneous Landscapes With Machine Learning [PDF]

Journal of Geophysical Research: Biogeosciences, 2021
AbstractThis paper discusses different feature selection methods and CO2 flux data sets with a varying quality‐quantity balance for the application of a Random Forest model to predict daily CO2 fluxes at 250 m spatial resolution for the Rur catchment area in western Germany between 2010 and 2018.
Reitz, O., Graf, A., Schmidt, M., Ketzler, G., Leuchner, M., Graf, A.; 2 Agrosphere Institute, Forschungszentrum Jülich Jülich Germany, Schmidt, M.; 2 Agrosphere Institute, Forschungszentrum Jülich Jülich Germany, Ketzler, G.; 1 Department of Geography, RWTH Aachen University Aachen Germany, Leuchner, M.; 1 Department of Geography, RWTH Aachen University Aachen Germany   +8 more
openaire   +4 more sources