Terrestrial Biosphere-Atmosphere FluxesFluxes of trace gases, water and energy - the 'breathing of the biosphere' - are controlled by a large number of interacting physical, chemical, biological and ecological processes. In this interdisciplinary book, the authors provide the tools to understand and quantitatively analyse fluxes of energy, organic compounds such as terpenes, and trace gases including carbon dioxide, water vapour and methane. It first introduces the fundamental principles affecting the supply and demand for trace gas exchange at the leaf and soil scales: thermodynamics, diffusion, turbulence and physiology. It then builds on these principles to model the exchange of water, carbon dioxide, terpenes and stable isotopes at the ecosystem scale. Detailed mathematical derivations of commonly used relations in biosphere-atmosphere interactions are provided for reference in appendices. An accessible introduction for graduate students and a key resource for researchers in related fields, such as atmospheric science, hydrology, meteorology, climate science, biogeochemistry and ecosystem ecology. |
Contents
1 | |
Thermodynamics work and energy | 15 |
Chemical reactions enzyme catalysts and stable isotopes | 38 |
Control over metabolic fluxes | 64 |
Modeling the metabolic CO₂ flux | 89 |
Diffusion and continuity | 111 |
Boundary layer and stomatal control over leaf fluxes | 136 |
Leaf structure and function | 173 |
Vertical structure and mixing of the atmosphere | 280 |
Wind and turbulence | 296 |
Observations of turbulent fluxes | 327 |
Modeling of fluxes at the canopy and landscape scales | 352 |
Soil fluxes of CO2 CH4 and NOx | 373 |
Fluxes of biogenic volatile compounds between plants and the atmosphere | 395 |
Stable isotope variants as tracers for studying biosphereatmosphere exchange | 415 |
434 | |
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Common terms and phrases
albedo assimilation rate atmospheric CO2 biomass boundary layer BVOCs capping inversion carbon carboxylation chemical chemical potential chloroplast CO₂ CO2 assimilation rate CO2 concentration CO2 mole fraction coefficient components compounds constant constituent convective decrease defined derived diffusive flux dry air ecosystems electron emission enzyme equation equilibrium exchange feedback Figure flow fluid flux density force forest free energy function global guard cells increase interactions isoprene isotope latent heat leaf area leaf area index leaf surface leaves mass mesophyll metabolic mixed layer mol¯¹ mole fraction molecular molecules observed occur oxidation parcel photon photon flux photorespiration photosynthetic plant pores potential PPFD processes production radiation ratio reactant reaction Redrawn reflects relation represents respiration Rubisco RuBP scalar scale sensible heat shear soil solar specific stomatal stomatal conductance substrate temperature thermodynamic transfer transport turbulent variables velocity vertical water vapor wind speed xylem