Volume 12, issue Volumes and issues. Matthes, S. Knox, C. Sturtevant, O. Sonnentag, J. Verfaillie, and D. Short summary. This research used a long-term data set of near-surface canopy hyperspectral reflectance collected over 5 years to test the ability of these measurements to predict ecosystem carbon flux at a pasture and rice paddy in the California Delta, USA. We determined that each reflectance sampling event best captured the integrated prior week of carbon dioxide uptake, providing an important benchmark for understanding the lagged correlation between ecosystem carbon uptake and biochemical reflectance.
We assessed the importance of aerobic CH4 oxidation in Alaskan lakes. We conducted field measurement of dissolved CH4 and O2 together with determination of the CH4 oxidation rate. We found that during winter, CH4 oxidation was limited by O2 concentration and during summer, by CH4 concentration.
In addition to seasonal variations, the type of permafrost on which the lakes were located was identified as a key factor, indicating that landscape processes play an important role in lake CH4 cycling. P release capacity of soil amended with RP varied between 6. Tagesson, R. Fensholt, S. Huber, S. Horion, I. Guiro, A. Ehammer, and J. Relationships between ecosystem properties of semi-arid savanna and reflected solar radiance between 35 and nm were investigated.
Normalised combinations of reflectance for the near infrared, shortwave infrared, and to nm were strongly affected by solar and viewing angle effects. Ecosystem properties of savannas were strongly correlated with reflectance at nm, and normalised combinations of reflectance were strong predictors of the savanna ecosystem properties. In this study, we highlight the role of soil physical conditions and gas transfer mechanisms and dynamics in the decomposition and storage of soil organic carbon in subsoil layers.
To illustrate it, we measured the time series of soil temperature, moisture and CO2 concentration and calculated CO2 fluxes along 1 m depth soil profiles during 6 months throughout two contrasted soil profiles along a hillslope in the central loess belt of Belgium. This study combines a 1-year monitoring of precipitation, ombrotrophic peatland water level and pore water concentration changes with bog discharge and DOC, iron, As and Pb stream concentrations.
