  Quality Control Of Carboeurope Flux Data - Part 1: Coupling Footprint Analyses With Flux Data Quality Assessment To Evaluate Sites In Forest Ecosystems; ; Aubinet, Marc  et alin Biogeosciences (2008), 5(2), Detailed reference viewed: 14 (2 ULg)CO2 balance of boreal, temperate, and tropical forests derived from a global database; ; et al in Global Change Biology (2007), 13(12), 2509-2537 Terrestrial ecosystems sequester 2.1 Pg of atmospheric carbon annually. A large amount of the terrestrial sink is realized by forests. However, considerable uncertainties remain regarding the fate of this ... [more ▼] Terrestrial ecosystems sequester 2.1 Pg of atmospheric carbon annually. A large amount of the terrestrial sink is realized by forests. However, considerable uncertainties remain regarding the fate of this carbon over both short and long timescales. Relevant data to address these uncertainties are being collected at many sites around the world, but syntheses of these data are still sparse. To facilitate future synthesis activities, we have assembled a comprehensive global database for forest ecosystems, which includes carbon budget variables (fluxes and stocks), ecosystem traits (e.g. leaf area index, age), as well as ancillary site information such as management regime, climate, and soil characteristics. This publicly available database can be used to quantify global, regional or biome-specific carbon budgets; to re-examine established relationships; to test emerging hypotheses about ecosystem functioning [e.g. a constant net ecosystem production (NEP) to gross primary production (GPP) ratio]; and as benchmarks for model evaluations. In this paper, we present the first analysis of this database. We discuss the climatic influences on GPP, net primary production (NPP) and NEP and present the CO2 balances for boreal, temperate, and tropical forest biomes based on micrometeorological, ecophysiological, and biometric flux and inventory estimates. Globally, GPP of forests benefited from higher temperatures and precipitation whereas NPP saturated above either a threshold of 1500 mm precipitation or a mean annual temperature of 10 degrees C. The global pattern in NEP was insensitive to climate and is hypothesized to be mainly determined by nonclimatic conditions such as successional stage, management, site history, and site disturbance. In all biomes, closing the CO2 balance required the introduction of substantial biome-specific closure terms. Nonclosure was taken as an indication that respiratory processes, advection, and non-CO2 carbon fluxes are not presently being adequately accounted for. [less ▲] Detailed reference viewed: 47 (4 ULg)Quality Analysis Applied On Eddy Covariance Measurements At Complex Forest Sites Using Footprint Modelling; ; et al in Theoretical and Applied Climatology (2005), 80(2-4), Detailed reference viewed: 12 (2 ULg)Methodology for data acquisition, storage and treatmentAubinet, Marc ; ; et alin Valentini, R. (Ed.) Fluxes of Carbon, Water and Energy of European Forests (2003) Detailed reference viewed: 14 (0 ULg)Diurnal Centroid Of Ecosystem Energy And Carbon Fluxes At Fluxnet Sites; ; et al in Journal of Geophysical Research. Atmospheres (2003), 108(D21), Detailed reference viewed: 18 (5 ULg)Energy Balance Closure At Fluxnet Sites; ; et al in Agricultural and Forest Meteorology (2002), 113(1-4), Detailed reference viewed: 10 (1 ULg)Carbon balance gradient in European forests: should we doubt 'surprising' results? A reply to Piovesan & Adams; ; et al in Journal of Vegetation Science (2001), 12(1), 145-150 This paper responds to the Forum contribution by Piovesan & Adams (2000) who criticized the results obtained by the EUROFLUX network on carbon fluxes of several European forests. The major point of ... [more ▼] This paper responds to the Forum contribution by Piovesan & Adams (2000) who criticized the results obtained by the EUROFLUX network on carbon fluxes of several European forests. The major point of criticism was that the data provided by EUROFLUX are inconsistent with current scientific understanding. It is argued that understanding the terrestrial global carbon cycle requires more than simply restating what was known previously, and that Piovesan & Adams have not been able to show any major conflicts between our findings and ecosystem or atmospheric-transport theories. [less ▲] Detailed reference viewed: 27 (1 ULg)Gap Filling Strategies For Long Term Energy Flux Data Sets; ; et al in Agricultural and Forest Meteorology (2001), 107(1), Detailed reference viewed: 10 (2 ULg)Productivity Overshadows Temperature In Determining Soil And Ecosystem Respiration Across European Forests; ; et al in Global Change Biology (2001), 7(3), Detailed reference viewed: 20 (1 ULg)Respiration As The Main Determinant Of Carbon Balance In European Forests; ; et al in Nature (2000), 404(6780), Detailed reference viewed: 30 (4 ULg)Estimates of the annual net carbon and water exchange of forests: the EUROFLUX methodology.Aubinet, Marc ; ; et alin Advances in Ecological Research (1999), 30 Detailed reference viewed: 493 (14 ULg) |
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