CO2 fluxes
Bowen Ratio Energy Balance Measurement of Carbon Dioxide (CO2) Fluxes of No Till and Conventional Tillage Agriculture in Lesotho
... Bowen Ratio Energy Balance Measurement of Carbon Dioxide CO2 Fluxes of No-Till and Conventional Tillage Agriculture in Lesotho Deb O’Dell1*, Thomas J.. Smith1, Wendy Bruns1, August Basso[r] ...
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Partitioning biotic and abiotic components of soil CO2 fluxes using subsurface CO2 dynamics and stable carbon isotopes, Taylor Valley, Antarctica
... Present estimates of soil respiration rates and C turnover times are based on surface carbon dioxide (CO 2 ) fl uxes and soil organic C content. However, the assumption that surface CO 2 [r] ...
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Estimates and Variability of the Air Sea CO2 Fluxes in the Gulf of Guinea during the 2005 2007 Period
... During F4 and F8 cruises, the fluxes reached −0.25 ± 0.79 mmol·m −2 ·d −1 and −0.16 ± 1.27 mmol·m −2 ·d −1 (resp. 1.28 ± 1.32 mmol·m −2 ·d −1 and 1.71 ± 2.09 mmol·m −2 ·d −1 ) in the north (resp. in the south). ...
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Source partitioning of H2O and CO2 fluxes based on high frequency eddy covariance data: a comparison between study sites
... Figure 2. Source partitioning results for (a) H 2 O and (b) CO 2 fluxes in half-hourly time steps for the Loobos study site (forest) in the Netherlands. The figure shows 4 days of the considered time period and ...
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Assessing biotic contributions to CO2 fluxes in northern China using the Vegetation, Photosynthesis and Respiration Model (VPRM CHINA) and observations from 2005 to 2009
... The dominant IGBP ecosystem types represented in the domain are effectively constant over the 5-year study pe- riod. Together, water and the major photosynthesizing land classes constitute 98 % of the domain (Fig. 1). We ...
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Water-air CO2 fluxes in the Tagus estuary plume (Portugal) during two distinct winter episodes
... Hourly values for wind, air temperature, relative humidity, barometric pressure and downward longwave and shortwave radiation, were used to calculate air-sea heat and momen- tum fluxes using bulk formulae. The ...
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On the role of climate modes in modulating the air–sea CO2 fluxes in eastern boundary upwelling systems
... large modes of climate variability in the two Atlantic EBUSs. However, Cropper et al. (2014) found that the North Atlantic Oscillation (NAO) plays a major role in modulating inter- annual variability of coastal upwelling ...
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Quantifying the contribution of land use to N2O, NO and CO2 fluxes in a montane forest ecosystem of Kenya
... Reviewer #1: The authors use a core incubation method at different soil moisture levels to determine emissions of N2O, NO and CO2 from soils across several intact and disturbed land use types in montane Kenya. ...
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The seasonal cycle of pCO2 and CO2 fluxes in the Southern Ocean: diagnosing anomalies in CMIP5 Earth system models
... main uncertain. For example, CMIP5 model differences in the magnitude and meridional location of the peak of wind speeds in the Southern Ocean (Bracegirdle et al., 2013) and MLD differences (Meijers, 2014; Sallée et al., ...
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Seasonal and diurnal variations in moisture, heat and CO2 fluxes over a typical steppe prairie in Inner Mongolia, China
... Desai, A. R., Noormets, A. N., Bolstad, P. V., Chen, J., Cook, B. D., Davis, K. J., Euskirchen, E. S., Gough, C. M., Martin, J. G., Ricciuto, D. M., Schmid, H. P., Tang, J. W., and Wang, W.: Influence of vegetation and ...
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Measuring turbulent CO2 fluxes with a closed-path gas analyzer in a marine environment
... Abstract. In this study, we introduce new observations of sea–air fluxes of carbon dioxide using the eddy covariance method. The measurements took place at the Utö Atmo- spheric and Marine Research Station on the ...
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Temperature response of ex situ greenhouse gas emissions from tropical peatlands: interactions between forest type and peat moisture conditions
... the greatest change in emissions high CO2 fluxes from mesic and flooded oxic.. treatments and high CH4 fluxes from the two flooded treatments; Fig.[r] ...
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Fluxes of Gaseous Elemental Mercury at a Mediterranean Coastal Grassland
... GEM fluxes based on the aerodynamic gradient method. The observed GEM fluxes were enlarged and positive during daytime, while during nighttime GEM fluxes were smaller and towards the surface for the ...
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Enhanced transfer of organic matter to higher trophic levels caused by ocean acidification and its implications for export production: a mass balance approach
... fer of carbon, nitrogen, and phosphorus from primary producers to higher trophic levels, during times of regenerated primary production. (2) A prolonged retention of all three ele- ments in the pelagic food web that ...
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Net primary production and carbon cycling in coast redwood forests of central California
... The monthly patterns of NPP at the three coast red- wood sites revealed seasonal differences in production rates that accounted for the range of predicted annual NPP (Figure 3). Maximum monthly NPP fluxes and the ...
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Cushion bogs are stronger carbon dioxide net sinks than moss dominated bogs as revealed by eddy covariance measurements on Tierra del Fuego, Argentina
... moss-dominated communities are therefore in principle able to use higher PAR levels in cool periods more effectively than the cushion plant-dominated communities. Taking into account the low amount of available radiation ...
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The Effects of Forest Thinning Practices and Altered Nutrient Supply on Soil Trace Gas Fluxes in Colorado
... Nitrous oxide fluxes were not significantly affected by any nutrient amendment. This result was somewhat surprising, as these plots had received monthly N additions for two full growing seasons, which we would ...
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Effects of elevated carbon dioxide on stomatal characteristics and carbon isotope ratio of Arabidopsis thaliana ecotypes originating from an altitudinal gradient
... the fluxes of CO2 and water vapour. These fluxes may be optimized by short-term variations in stomatal aperture and longer-term changes in stomatal density (SD) and size (S) (Franks and Beerling ...
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Can land degradation drive differences in the C exchange of two similar semiarid ecosystems?
... Abstract. Currently, drylands occupy more than one-third of the global terrestrial surface and are recognized as areas vul- nerable to land degradation. The concept of land degradation stems from the loss of an ...
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An airborne regional carbon balance for Central Amazonia
... 2.3 Trajectory analysis and possible advective effects To assess the validity of the Eulerian assumptions, and to ac- count for any possible advective fluxes, we employed a con- vective sigma-z kinematic ...
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