Results 281 to 290 of about 1,860,518 (333)

Assessing the eddy covariance technique for evaluating carbon dioxide exchange rates of ecosystems: past, present and future

Global Change Biology, 2003
D. Baldocchi
exaly   +2 more sources

Aquatic Eddy Covariance: The Method and Its Contributions to Defining Oxygen and Carbon Fluxes in Marine Environments.

Annual Review of Marine Science, 2021
Aquatic eddy covariance (AEC) is increasingly being used to study benthic oxygen (O2) flux dynamics, organic carbon cycling, and ecosystem health in marine and freshwater environments. Because it is a noninvasive technique, has a high temporal resolution
P. Berg, M. Huettel, R. Glud, C. Reimers, K. Attard   +4 more
semanticscholar   +1 more source

Gap‐filling approaches for eddy covariance methane fluxes: A comparison of three machine learning algorithms and a traditional method with principal component analysis

Global Change Biology, 2019
Methane flux (FCH4) measurements using the eddy covariance technique have increased over the past decade. FCH4 measurements commonly include data gaps, as is the case with CO2 and energy fluxes.
Yeonuk Kim, Mark S. Johnson, Sara H. Knox, T. A. Black, H. Dalmagro, Minseok Kang, Joon Kim, D. Baldocchi   +7 more
semanticscholar   +1 more source

Recurrence Analysis of Eddy Covariance Fluxes

2016
Measuring energy and matter fluxes between the atmosphere and vegetation using the Eddy Covariance (EC) technique is the state-of-the-art method to quantify carbon exchange between terrestrial ecosystems and their surrounding. The EC equipment is usually mounted onto a flux tower reaching higher than the local canopy.
Flach, M., Lange, H., Foken, T., Hauhs, M.   +3 more
openaire   +2 more sources

EClog: A handheld eddy covariance logging system

Computers and Electronics in Agriculture, 2006
A new eddy covariance logging (EClog) system has been developed based on a handheld computer. The logging program, written in C language, reads the digital data from the sonic anemometer and writes it to a CompactFlash card, at the same time showing instantaneous data, means and fluxes on the screen.
van der Molen, M.K., Zeeman, M.J., Lebis, J., Dolman, A.J.   +3 more
openaire   +2 more sources

Energy Imbalance and Evapotranspiration Hysteresis Under an Advective Environment: Evidence From Lysimeter, Eddy Covariance, and Energy Balance Modeling

Geophysical Research Letters, 2020
Surface energy imbalance problems have been underexplored especially under advective environments. Here, we present a novel analysis of surface energy fluxes from three distinct approaches—weighing lysimeter, eddy covariance (EC), and surface energy ...
R. Dhungel, R. Aiken, S. Evett, P. Colaizzi, G. Marek, J. Moorhead, R. Baumhardt, D. Brauer, S. Kutikoff, Xiaomao Lin   +9 more
semanticscholar   +1 more source

Disjunct Eddy Covariance Method

2011
The eddy covariance method (EC) requires that all frequencies of turbulent motions and trace gas variations contributing to the flux are resolved by the measurement system. In conventional EC systems this is achieved by using anemometers and gas analyzers with fast response time and high data sampling frequency in order to catch the high-frequency end ...
Janne Rinne, Christof Ammann
openaire   +1 more source

The Eddy Covariance Method

2011
The eddy covariance method for measuring exchanges of heat, mass, and momentum between a flat, horizontally homogeneous surface and the overlying atmosphere was proposed by Montgomery (1948), Swinbank (1951), and Obukhov 1951). Under these conditions, net transport between the surface and atmosphere is one-dimensional and the vertical flux density can ...
Thomas Foken, Marc Aubinet, Ray Leuning
openaire   +1 more source

Eddy Covariance Measurements over Lakes

2011
We give an overview on the status of eddy covariance measurements over lake surfaces with a focus on CO2 fluxes. Inland waters have a significant role in the sequestration, transport, and mineralization of organic carbon (Battin et~al. 2009; Tranvik et~al. 2009).
Timo Vesala, Werner Eugster, Anne Ojala
openaire   +1 more source

Aquatic Biogeochemical Eddy Covariance Fluxes in the Presence of Waves

Journal of Geophysical Research: Oceans, 2020
The eddy covariance (EC) technique is a powerful tool for measuring atmospheric exchange rates that was recently adapted by biogeochemists to measure aquatic oxygen fluxes.
M. Long
semanticscholar   +1 more source