Results 41 to 50 of about 327,544 (281)

Does increased spatial replication above heterogeneous agroforestry improve the representativeness of eddy covariance measurements? [PDF]

Biogeosciences
Spatial heterogeneity in terrestrial ecosystems compromises the accuracy of eddy covariance measurements. Examples of heterogeneous ecosystems are temperate agroforestry systems, which have been poorly studied by eddy covariance.
J. Á. Callejas-Rodelas, J. Á. Callejas-Rodelas, A. Knohl, A. Knohl, I. Mammarella, T. Vesala, T. Vesala, O. Peltola, C. Markwitz   +8 more
doaj   +1 more source

Lag time determination in DEC measurements with PTR-MS [PDF]

Atmospheric Measurement Techniques, 2010
The disjunct eddy covariance (DEC) method has emerged as a popular technique for micrometeorological flux measurements of volatile organic compounds (VOCs).
R. Taipale, T. M. Ruuskanen, J. Rinne
doaj   +1 more source

Daily Carbon Dioxide fluxes measured by an eddy-covariance station in a recently burnt Mediterranean pine stand in Central Portugal

, 2020
An eddy-covariance system was installed in a young Maritime Pine plantation in Central Portugal immediately after a wildfire that occurred on 13 August 2017, and has been monitoring CO2 fluxes from the 43th post-fire day onwards.
Foken, Thomas, Keizer, J Jacob, Oliveira, Bruna R F   +2 more
core   +1 more source

Concentrations and fluxes of biogenic volatile organic compounds above a Mediterranean macchia ecosystem in western Italy [PDF]

, 2009
Emission rates and concentrations of biogenic volatile organic compounds (BVOCs) were measured at a Mediterranean coastal site at Castelporziano, approximately 25 km south-west of Rome, between 7 May and 3 June 2007, as part of the ACCENT-VOCBAS field ...
Fares, S, Misztal, P, S. Fares, J. N. Cape, Cape, J. N, Fares, S., P. Misztal, Loreto, F, Rinne, J., Langford, B., Matteucci, G, Hewitt, C. N., Davison, B., Cape, J.N., Loreto, F., Cape, J. N., Taipale, Risto, B. Langford, Rinne, Janne, Hewitt, C. N, C. N. Hewitt, R. Taipale, Taipale, R., B. Davison, G. Matteucci, Hewitt, C.N., Langford, B, J. Rinne, Davison, B, Misztal, P., F. Loreto, Matteucci, G.   +31 more
core   +6 more sources

Improved processing methods for eddy covariance measurements in calculating sensible heat fluxes at glacier surfaces

Journal of Glaciology
Bulk aerodynamic methods have been shown to perform poorly in computing turbulent heat fluxes at glacier surfaces during shallow katabatic winds. Katabatic surface layers have different wind shear and flux profiles to the surface layers for which the ...
Cole Lord-May, Valentina Radić
doaj   +1 more source

High‐Latitude Eddy Covariance Temporal Network Design and Optimization

Journal of Geophysical Research: Biogeosciences, 2023
Abstract Ecosystems at high latitudes are changing rapidly in response to climate change. To understand changes in carbon fluxes across seasonal to multi‐decadal timescales, long‐term in situ measurements from eddy covariance networks are needed. However, there are large spatiotemporal gaps in
Martijn Pallandt, Martin Jung, Kyle A Arndt, Susan M. Natali, Brendan Rogers, Anna- Maria Virkkala, Mathias Göckede   +6 more
openaire   +2 more sources

Estimating scalar turbulent fluxes with slow-response sensors in the stable atmospheric boundary layer [PDF]

Atmospheric Chemistry and Physics
Conventional and recently developed approaches for estimating turbulent scalar fluxes under stable atmospheric conditions are evaluated, with a focus on gases for which fast sensors are not readily available.
M. Allouche, M. Allouche, V. I. Sevostianov, V. I. Sevostianov, E. Zahn, M. A. Zondlo, M. A. Zondlo, N. L. Dias, G. G. Katul, J. D. Fuentes, E. Bou-Zeid   +10 more
doaj   +1 more source

Modelling Amazonian forest eddy covariance data: a comparison of big leaf versus sun/shade models for the C-14 tower at Manaus I. Canopy photosynthesis [PDF]

Acta Amazonica, 2006
In this study, we concentrate on modelling gross primary productivity using two simple approaches to simulate canopy photosynthesis: "big leaf" and "sun/shade" models.
Lina Mercado, Jon Lloyd, Fiona Carswell, Yadvinder Malhi, Patrick Meir, Antonio Donato Nobre   +5 more
doaj   +1 more source

Eddy-Covariance Software TK3

, 2018
With the software package TK3 for the calculation of eddy-covariance data a programme version was developed, which is based on more than 25 years experiences.
Foken, Thomas (5254507), Mauder, Matthias (5254504)   +1 more
core   +1 more source

Longer growing seasons do not increase net carbon uptake in Northeastern Siberian tundra [PDF]

, 2011
With global warming, snowmelt is occurring earlier and growing seasons are becoming longer around the Arctic. It has been suggested that this would lead to more uptake of carbon due to a lengthening of the period in which plants photosynthesize.
Dolman, A.J., Parmentier, F.J.W., Suzdalov, D., Maximov, T.C., Molen, M.K., van der, Huissteden, J., van, Karsanaev, S., Kononov, A.V.   +7 more
core   +1 more source