Estimating carbon fluxes from daily data
نویسندگان
چکیده
Daily CO2 flux estimates over Europe from continuous atmospheric measurements: 1, inverse methodology P. Peylin, P. J. Rayner, P. Bousquet, C. Carouge, F. Hourdin, P. Heinrich, P. Ciais, and AEROCARB contributors Laboratoire de Biogéochimie isotopique, CNRS-UPMC-INRA, Paris, France CSIRO Atmospheric Research, Aspendale, Victoria, Australia Laboratoire des Sciences du Climat et de l’Environnement, CEA, Gif-sur-Yvette, France Laboratoire de Météorologie Dynamique, CNRS, Paris, France Laboratoire DASE/LDG, CEA, Bruyeres-le-Chatel, France Experimentalists that contributed to the atmospheric measurements: A. Adolphsen, F. Apadula, R. Graul, L. Haszpra, M. Ramonet, R. Santaguida, M. Schmidt Received: 21 December 2004 – Accepted: 11 February 2005 – Published: 18 March 2005 Correspondence to: P. Peylin ([email protected]) © 2005 Author(s). This work is licensed under a Creative Commons License.
منابع مشابه
Impacts of urbanization on land–atmosphere carbon exchange within a metropolitan area in the USA
Urbanization can cause changes in carbon fluxes, which, in turn, impacts atmospheric carbon dioxide (CO2) concentrations and possibly global surface temperatures. Using the Atlanta, Georgia, region as a case study, this paper explores the impact of urban expansion from 1973 to 2002 on land–atmosphere carbon exchange. The major objectives were to estimate net ecosystem production (NEP) values fo...
متن کاملOn the relationship between ecosystem-scale hyperspectral reflectance and CO2 exchange in European mountain grasslands
In this paper we explore the skill of hyperspectral reflectance measurements and vegetation indices (VIs) derived from these in estimating carbon dioxide (CO2) fluxes of grasslands. Hyperspectral reflectance data, CO2 fluxes and biophysical parameters were measured at three grassland sites located in European mountain regions using standardized protocols. The relationships between CO2 fluxes, e...
متن کاملEstimation of Net Radiation Using Satellite Based Data Inputs
Daily net surface radiation fluxes are estimated for Indian land mass at spatial grid intervals of 0.1 degree. Two approaches are employed to obtain daily net radiation for four sample days viz., November 19, 2013, December 16, 2013, January 8, 2014 and March 20, 2014. Both the approaches compute net shortwave and net longwave fluxes, separately and sum them up to obtain net radiation. The firs...
متن کاملContrasting short- and long-timescale effects of vegetation dynamics on water and carbon fluxes in water-limited ecosystems
[1] While it is generally believed that the magnitude and composition of vegetation cover influence land-atmosphere water and carbon fluxes, observations indicate that in some cases, fluxes are insensitive to land cover contrasts. This seeming inconsistency may be resolved by contrasting fluxes over short and long timescales. To explore this potential contrast, we developed and tested a model d...
متن کاملAn analytical model for estimating canopy transpiration and carbon assimilation fluxes based on canopy light-use efficiency
We develop a simple, analytical model for canopy resistance to canopy–atmosphere gas exchange that is well suited for incorporation into regional-scale land-surface parameterizations. This model exploits the conservative nature of canopy light-use efficiency (LUE) in carbon assimilation that is observed within broad categories of plant species. The model paradigm assumes that under standard env...
متن کاملRelevance of Global Remote-sensing Fapar Products to Carbon Flux Estimates
This contribution gives an overview of the Medium Resolution Imaging Spectrometer (MERIS) global land product corresponding to the biophysical variable of the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR). This product can be used in largescale biosphere modeling for better estimating the carbon fluxes since they directly represent the amount of solar energy which serves as a...
متن کامل