قارن الطرق

	قياس التنفس في التربة	طريقة التغاير الدوامي (Eddy Covariance)
المجال	علم المحاصيل	علم الأرصاد الجوية
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	Mid-20th century (chamber methods formalised ~1950s–1970s; automated systems ~1990s)	1951
صاحب الطريقة	Multiple contributors	Swinbank
النوع	Field measurement technique	Micrometeorological flux measurement
المصدر التأسيسي	Hanson, P. J., Edwards, N. T., Garten, C. T., & Andrews, J. A. (2000). Separating root and soil microbial contributions to soil respiration: A review of methods and observations. Biogeochemistry, 48(1), 115–146.	Baldocchi, D. (2003). Assessing the eddy covariance technique for evaluating carbon dioxide fluxes of ecosystems: past, present and future. Global Change Biology, 9(4), 479-492.
الأسماء البديلة	soil CO2 efflux measurement, soil carbon flux measurement, belowground respiration measurement, soil surface CO2 flux measurement	Eddy covariance, EC flux, Eddy correlation, Direct flux measurement
ذات صلة	1	3
الملخص	Soil respiration measurement quantifies the rate at which CO2 is released from the soil surface to the atmosphere, integrating contributions from root respiration and microbial decomposition of organic matter. It is a fundamental technique in agronomy, ecology, and climate science, providing insight into belowground carbon cycling, soil biological activity, and ecosystem carbon balance. Measurements are typically made using static or dynamic chambers placed on the soil surface.	The eddy covariance method is a direct, micrometeorological technique that measures turbulent fluxes of momentum, heat, water vapor, and CO2 by computing the covariance between high-frequency fluctuations of wind velocity and scalar properties (temperature, humidity, concentration). It is the gold standard for measuring ecosystem-atmosphere exchanges and validating model parameterizations.