Soil sampling and preparation for monitoring soil carbon
GOGO, Sébastien
Institut des Sciences de la Terre d'Orléans - UMR7327 [ISTO]
Biogéosystèmes Continentaux - UMR7327
< Leer menos
Institut des Sciences de la Terre d'Orléans - UMR7327 [ISTO]
Biogéosystèmes Continentaux - UMR7327
Idioma
en
Article de revue
Este ítem está publicado en
International Agrophysics. 2018, vol. 32, n° 32, p. 633-643
Sciendo/De Gruyter
Resumen en inglés
There is an urgent need for standardized monitoring of existing soil organic carbon stocks in order to accurately quantify potential negative or positive feedbacks with climate change on carbon fluxes. Given the uncertainty ...Leer más >
There is an urgent need for standardized monitoring of existing soil organic carbon stocks in order to accurately quantify potential negative or positive feedbacks with climate change on carbon fluxes. Given the uncertainty of flux measurements at the ecosystem scale, obtaining precise estimates of changes in soil organic carbon stocks is essential to provide an independent assessment of long-Term net ecosystem carbon exchange. Here we describe the standard procedure to monitor the soil organic carbon stocks within the footprint of an eddy covariance flux tower, as applied at ecosystem stations of the Integrated Carbon Observation System. The objectives are i) to ensure comparability between sites and to be able to draw general conclusions from the results obtained across many ecosystems and ii) to optimize the sampling design in order to be able to prove changes in time using a reduced number of samples. When sampling a given site at two periods, the objective is generally to assess if changes occurred in time. The changes that can be detected (i.e., demonstrated as statistically significant) depend on several parameters such as the number of samples, the spatial sampling design, and the inherent within-site soil variability. Depending on these parameters, one can define the 'minimum detectable change' which is the minimum value of changed that can be statistically proved. Using simulation studies, we address the trade-off between increasing the number of samples and getting lower minimum detectable changes of soil organic carbon stocks.< Leer menos
Palabras clave
sciences du sol
gaz à effet de serre
carbone organique du sol
Palabras clave en inglés
greenhouse gases
ICOS protocol
soil organic carbon stocks
sampling design
SOC measurements
soil sciences
Orígen
Importado de HalCentros de investigación