Sentences with phrase «eddy covariance»

Kato, T. & Tang, Y. Spatial variability and major controlling factors of CO2 sink strength in Asian terrestrial ecosystems: Evidence from eddy covariance data.

Measurements of GPP by eddy covariance methods is auto - correlated with other components of the carbon cycle and is restricted to specific locations.

Ecosystem - atmosphere CO2 exchange on short time - scales can be measured using micrometeorological techniques such as eddy covariance, which relies on rapidly responding sensors mounted on towers to resolve the net flux of CO2 between a patch of land and the atmosphere (Baldocchi et al., 1988).

Currently, the use of eddy covariance systems over lakes and reservoirs is relatively new and poses several challenges.

Although we did not explicitly address the temporal or spatial resolution of emission data from each system, it is notable that the few published acoustic and eddy covariance - based reservoir CH4 flux estimates are quite high compared to the median CH4 flux estimates from less temporally and / or spatially integrated measurement techniques (figure 1).

Aquatic GHG fluxes are measured using a variety of techniques (e.g., floating chambers, thin boundary methods, eddy covariance towers, acoustic methods, and funnels; supplemental figure S1) that provide varying degrees of spatial and temporal coverage and accuracy (St. Louis et al. 2000).

In the majority of cases, ebullition was measured with funnels or was lumped with diffusive flux via floating chamber measurements; however, in two studies, researchers estimated methane fluxes via eddy covariance (Eugster et al. 2011, Deshmukh et al. 2014), and in another two studies, researchers estimated ebullitive flux via acoustic methods (DelSontro et al. 2011, 2015).

Field intercomparison of four methane gas analyzers suitable for eddy covariance flux measurements

Workshop participants recommended that steps should be taken to define air - sea fluxes as ECVs or EOVs, particularly for those fluxes that can be measured directly and for which there is consensus about measurement methods (e.g., air - sea heat and momentum exchanges using the eddy covariance method).

The eddy covariance observations and the model simulations over Europe illustrate the fact that there is a larger correlation of flux changes with rainfall than with temperature changes.

did the analysis, M.R. did the eddy covariance data harmonization and interpretation, and N.V. did the modelling.

Ocean heat flux is a turbulent and complex system [7] which utilizes atmospheric measurement techniques such as eddy covariance to measure the rate of heat transfer expressed in the unit of joules or watts per second.

However, Helbig et al. [2017], using a set of nested paired eddy covariance flux towers in a boreal forest - wetland landscape, point to the increasing importance of warming temperatures on ecosystem respiration potentially overwhelming enhanced productivity occurring from land cover change under projected anthropogenic trends.

Celis et al., 2017 combined six years of eddy covariance flux tower data and soil respiration chambers and found that a moist tundra site was a source of carbon to the atmosphere, but much of the net source arises from the slow, but continuous emissions in winter.

In this specific site, the researchers are measuring the exchange of CO2 and CH4 between the ecosystem and the atmosphere using the first eddy covariance tower established in the state of Delaware since 2015.

If it's positive, it means that CO2 is being released into the atmosphere, and the way we quantify that is with the eddy covariance technique that measures the exchange of mass and energy between the atmosphere and the land - surface.»

The tower is part of the AmeriFlux network, a consortium of scientists using a network to work with the eddy covariance technique, measuring fluxes of CO2 and CH4 at multiple sites across the Americas.

Not exact matches

Our key tools are instrumentation that observe the atmosphere (eddy - covariance flux stations, lidar, sodar, ceilometers, scintillometers, infra - red cameras).

Lasslop, G., Reichstein, M., Detto, M., Richardson, A. D. & Baldocchi, D. D. Comment on Vickers et al: Self - correlation between assimilation and respiration resulting from flux partitioning of eddy - covariance CO2 fluxes.

Vickers, D., Thomas, C. K., Martin, J. G. & Law, B. Self - correlation between assimilation and respiration resulting from flux partitioning of eddy - covariance CO2 fluxes.