gas fluxes
Quantifying wind and pressure effects on trace gas fluxes across the soil-atmosphere interface
... Empirical and modelling studies have shown that, through their effect on advection, soil–atmosphere pressure differ- entials can alter the direction and magnitude of gas fluxes substantially ( ± ≤ 1000 %) ...
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The Effects of Forest Thinning Practices and Altered Nutrient Supply on Soil Trace Gas Fluxes in Colorado
... We used a one-way analysis of variance to determine the effect of treatments (broadcast chipping, thinning only & control) on three environmental variables; litter mass, soil C & soil N. If a significant (p ≤ ...
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Quantification of Greenhouse Gas Fluxes and Derivation of Maize Cropping Calendar in Croplands under Rainfall Variability in Kenya
... The DeNitrification-DeComposition (DNDC) model version 9.5 was used in this study (Li et al., 1992). The DNDC model is a process-based model of carbon (C) and nitrogen (N) biogeochemistry in agricultural ecosystems. The ...
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Modeling impacts of changes in temperature and water table on C gas fluxes in an Alaskan peatland
... C gas fl uxes is not consistent between the DNDC and peatland DOS-TEM simulations, perhaps associated with the differences in both model formulations and scenario setting, the two sets of model simulations arrive ...
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Automatic high frequency measurements of full soil greenhouse gas fluxes in a tropical forest
... A cleaning frequency of once a week was necessary and suf- ficient to remove falling leaves and branches from the auto- matic chamber system, prevent leaks, and generate a continu- ous dataset of soil GHG fluxes ...
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Greenhouse Gas Fluxes from Created Wetlands: How Management Techniques Impact Emissions and Implications for Climate Change
... Wetlands are one of the most valuable ecosystems, providing services such as carbon sequestration and nitrogen removal. Studies suggest that created wetlands may not function the same as natural wetlands and management ...
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Evaluating effects of land management on greenhouse gas fluxes and carbon balances in boreo-temperate lowland peatland systems
... Lowland peats differ in many respects from the blan- ket mires of the uplands. Whereas blanket peat forms under conditions of high rainfall and low temperatures, lowland fens and raised bogs can form under drier and ...
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The FluxEngine air–sea gas flux toolbox: simplified interface and extensions for in situ analyses and multiple sparingly soluble gases
... air–sea gas fluxes is critical if we are to monitor the oceans and assess the impact that these gases are having on Earth’s climate and ...air–sea gas fluxes from model, in situ, and Earth ...
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Residue Placement and Rate, Crop Species, and Nitrogen Fertilization Effects on Soil Greenhouse Gas Emissions
... GHG fluxes at the field scale often mask differ- ences among treatments ...GHG fluxes in the field due to soil heterogeneity and differ- ences in chamber size and methods of measurement ...measuring ...
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Eddy covariance for quantifying trace gas fluxes from soils
... Besides data-driven approaches, combining the EC tech- nique with modeling approaches to reliably estimate the con- tribution of heterogeneously distributed sources and sinks of specific trace gases to the net flux can ...
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Integration of the DAYCENT Biogeochemical Model within a Multi-Model Framework
... Muth and Bryden (2012a) developed an integrated modeling framework for determining sustainable agricultural residue removal that overcame several of the computational limitations of previous modeling approaches. The ...
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Investigation of Temperature and Flow Fields in an Alternative Design of Industrial Cracking Furnaces Using CFD
... flue gas temperature profiles and heat fluxes towards the reactor tubes, as well as on the predicted species concentration profiles and flame structure under normal firing conditions of the same industrial ...
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The Interstellar Medium in High redshift Submillimeter Galaxies as Probed by Infrared Spectroscopy*
... emitting gas will be situated in the PDRs along with the [C II ]158, and thus be co-spatial on all but the smallest scales, making them unlikely to be strongly systematically affected by differential ...
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Biotic pump of atmospheric moisture as driver of the hydrological cycle on land
... transpiration fluxes via stomata opening/closure, regulation of the vertical temper- ature gradient below the canopy, facilitation of precipitation by biogenic aerosols, and other unknown processes, of which some ...
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The effects of gas-phase and in-depth radiation absorption on ignition and steady burning rate of PMMA
... there is significant absorption of radiation by gaseous MMA in the plume above the degrading sample and the role of gas-phase absorption in ignition and steady burning rate is unclear. Measurements of quasi-steady ...
31
Metabolic pathway analysis for in silico design of efficient autotrophic production of advanced biofuels
... As summarized in Table 1, there existed 1068 paths supporting isobutanol synthesis equivalent to a 12% of all available pathways (P-frac = 12%), and 1392 paths sup- porting hexadecanol synthesis which was a 15% of all ...
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Turbulent flux modelling with a simple 2 layer soil model and extrapolated surface temperature applied at Nam Co Lake basin on the Tibetan Plateau
... A different way of looking at the model performance is cross correlation of the modelled surface fluxes against EC mea- surements and SEWAB (Fig. 8). These measures give an insight into the reasons for the delayed ...
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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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Measuring turbulent CO2 fluxes with a closed-path gas analyzer in a marine environment
... are made of Teflon (inner diameter of 3.175 mm) and steel (inner diameter of 4.0 mm). The steel-tube sample line is equipped with a virtual impactor (see Appendix A), to pro- tect the instrument from possible exposure to ...
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New calibration procedures for airborne turbulence measurements and accuracy of the methane fluxes during the AirMeth campaigns
... methane fluxes in the ...turbulent fluxes of methane and carbon dioxide using cavity ring-down spectroscopy trace gas analy- sers together with established turbulence equipment achieve a relative ...
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