Results 51 to 60 of about 327,544 (281)

The use of disjunct eddy sampling methods for the determination of ecosystem level fluxes of trace gases [PDF]

Atmospheric Chemistry and Physics, 2009
The concept of disjunct eddy sampling (DES) for use in measuring ecosystem-level micrometeorological fluxes is re-examined. The governing equations are discussed as well as other practical considerations and guidelines concerning this sampling method as ...
A. A. Turnipseed, S. N. Pressley, T. Karl, B. Lamb, E. Nemitz, E. Allwine, W. A. Cooper, S. Shertz, A. B. Guenther   +8 more
doaj  

Howland Forest, ME, USA: Multi-Gas Flux (CO₂, CH₄, N₂O) Social Cost Product Underscores Limited Carbon Proxies

Land, 2021
Forest carbon sequestration is a widely accepted natural climate solution. However, methods to determine net carbon offsets are based on commercial carbon proxies or CO2 eddy covariance research with limited methodological comparisons. Non-CO2 greenhouse
Bruno D. V. Marino, Nahuel Bautista, Brandt Rousseaux   +2 more
doaj   +1 more source

Carbon dioxide fluxes measured at eddy-covariance station EC-G

, 2014
Carbon dioxide fluxes measured at eddy-covariance station EC-
Biermann, Tobias, Kuzyakov, Yakov, Seeber, Elke, Leipold, Thomas, Xingliang Xu (8007905), Li, Maoshan, Tobias Biermann (8007893), Xu, Xingliang, Thomas Leipold (8007899), Foken, Thomas, Ma, Yaoming, Miehe, Georg, Yaoming Ma (381795), Thomas Foken (8007908), Georg Guggenberger (305432), Johannes Ingrisch (8007890), Maoshan Li (8007902), Guggenberger, Georg, Yakov Kuzyakov (8007911), Ingrisch, Johannes, Elke Seeber (8007896), Georg Miehe (6962339)   +21 more
core   +1 more source

Microscale Mapping of Fiber Strain and Damage in Composite Wrinkled Laminates Using Computed Tomography Assisted Wide‐Angle X‐Ray Scattering

Advanced Science, EarlyView.
This study combines full‐field tomography with diffraction mapping to quantify radial (ε002$\varepsilon _{002}$) and axial (ε100$\varepsilon _{100}$) lattice strain in wrinkled carbon‐fiber specimens for the first time. Radial microstrain gradients (−14.5 µεMPa$\varepsilon \mathrm{MPa}$−1) are found to signal damage‐prone zones ahead of failure, which ...
Hoang Minh Luong, James Trevarthen, Igor Dolbnya, Wadwan Singhapong, Nicholas Pilato, Richard Butler, Jiraphant Srisuriyachot, Alexander J. G. Lunt   +7 more
wiley   +1 more source

Some aspects of the energy balance closure problem [PDF]

Atmospheric Chemistry and Physics, 2006
After briefly discussing several reasons for the energy balance closure problem in the surface layer, the paper focuses on the influence of the low frequency part of the turbulence spectrum on the residual. Changes in the turbulent fluxes in this part of
T. Foken, F. Wimmer, M. Mauder, C. Thomas, C. Liebethal   +4 more
doaj  

Measuring the biosphere-atmosphere exchange of total reactive nitrogen by eddy covariance [PDF]

Biogeosciences, 2012
The (net) exchange of reactive nitrogen (N_r) with the atmosphere is an important driver for ecosystem productivity and greenhouse gas exchange.
C. Ammann, V. Wolff, O. Marx, C. Brümmer, A. Neftel   +4 more
doaj   +1 more source

Artificial intelligence and Eddy covariance: A review

Science of The Total Environment
The Eddy Covariance (EC) method allows for monitoring carbon, water, and energy fluxes between Earth's surface and atmosphere. Due to its varying interdependent data streams and abundance of data as a whole, EC is naturally suited to Artificial Intelligence (AI) approaches.
Lucarini, Arianna, Cascio, Mauro Lo, Marras, Serena, Sirca, Costantino, Spano, Donatella   +4 more
openaire   +3 more sources

A Global Methane Observation System to Reduce Uncertainty for Anthropogenic and Natural Sources and Sinks for Detecting and Attributing Climate Feedbacks

Advanced Science, EarlyView.
Conceptual illustration of a Global Ecosystem Methane Observing System (GEM‐OS) integrating satellites, aircraft, atmospheric networks, and ecosystem measurements to quantify methane emissions from anthropogenic and natural sources. The multi‐scale observing framework improves source attribution, reduces uncertainty in regional methane budgets, and ...
P. Ciais, S. Peng, J. Chang, F. Li, Q. Zhu, K. Yuan, G. Hugelius, H. Li, Y. Cai, F. Chevallier, K. Tibrewal, E. A. Kort, K. Arndt, J. Watts, B. Buma, N. Besic, P. I. Palmer, H. Cadillo‐Quiroz, E. Euskirchen, M. J. Gondwe, A. Hoyt, R. Jackson, S. Malone, D. Monteverde, S. Natali, M. Ramonet, C. Rey‐Sanchez, L. B. Sagang, E. A. G. Schuur, R. Vargas, R. Varner, Z. Zhang, B. Poulter   +32 more
wiley   +1 more source

Science to Commerce: A Commercial-Scale Protocol for Carbon Trading Applied to a 28-Year Record of Forest Carbon Monitoring at the Harvard Forest

Land, 2021
Forest carbon sequestration offset protocols have been employed for more than 20 years with limited success in slowing deforestation and increasing forest carbon trading volume. Direct measurement of forest carbon flux improves quantification for trading
Nahuel Bautista, Bruno D. V. Marino, J. William Munger   +2 more
doaj   +1 more source

Tolerance of eddy covariance flux measurement

Hydrological Research Letters, 2011
Eddy covariance (EC) flux measurement is the most-used technique for observation of the fluxes of sensible heat, latent heat, and carbon dioxide between the land surface and the atmospheric boundary layer. Despite the availability of plentiful EC data from numerous research projects, it is difficult to make meaningful comparisons of EC at different ...
Kim, Wonsik, Cho, Jaeil, Komori, Daisuke, Aoki, Masatoshi, Yokozawa, Masayuki, Kanae, Shinjiro, Oki, Taikan   +6 more
openaire   +2 more sources