Networks of eddy-covariance (EC) towers such as AmeriFlux, ICOS and NEON are vital for providing thenecessary distributed observations to address interactions at the soil-vegetation-atmosphere interface.NEON, close to full operation with 47 tower sites, will represent the largest single-provider EC ...
This is rarely a concern for EC towers placed in homogenous terrain as all source terrain is assumed to have uniform fluxes. However, in heterogeneous environments, or when EC measurements are conducted from tall towers or airborne platforms, which result in a very large footprint, a footprint...
work of eddy covariance towers (FLUXNET). We present a new model TRee Induction ALgorithm (TRIAL) that per- forms hierarchical stratification of the data set into units where particular multiple regressions for a target variable hold. We propose an ensemble approach (Evolving tRees with RandOm ...
We therefore conclude that corrections for systematic flux differences (e.g., caused by different environmental conditions at both EC towers) can help to apply the two-tower approach to more site pairs with less ideal conditions. 展开 关键词: Geology ...
A global network of long-term CO2 and water vapor flux measurements has existed since the late 1990s (Baldocchi et al., 2001) and flux towers are nowadays organized in continental-scale research infrastructures like the Integrated Carbon Observation System (ICOS) in Europe (Heiskanen et al., ...
system38. If SC was not provided or missing, two cases were implemented: for measurement heights lower than 3 m and short canopies, the SC term was considered to be 0; for taller towers/canopies, a discrete estimation based on the top measurement of CO2concentration was used to compute ...
Croplands are managed ecosystems with rapid development over the course of the growing season under nearly optimal growth conditions with respect to nutrient availability (fertilization), water availability (possible irrigation in dry conditions), compet
These three towers were in line in the SW to NE direction which was the dominant wind direction for the site. All the used gas analysers were of open-path type (LI-7500), two of the sonics were produced by Gill and the one in the central tower by Metek. The analysers were ...
By testing their results against eddy covariance measurements from 34 instrumented towers in North America and Europe, they found that this ratio was a robust scaling factor in comparison with the EF conservation method. It appears that all the upscaling methods cited above can be effectively used ...
Papale, D.et al. Effect of spatial sampling from European flux towers for estimating carbon and water fluxes with artificial neural networks: Sampling Effect on Fluxes Upscaling.J. Geophys. Res. Biogeosci.120, 1941–1957 (2015). ArticleGoogle Scholar ...