搜索结果: 1-12 共查到“大气科学 Eddy covariance”相关记录12条 . 查询时间(0.031 秒)
Eddy covariance VOC emission and deposition fluxes above grassland using PTR-TOF
VOC grassland PTR-TOF
2011/2/24
Eddy covariance (EC) is the preferable technique for flux measurements since it is the only direct flux determination method. It requires a continuum of high time resolution measurements (e.g. 5–20 Hz...
Constraining the concentration of the hydroxyl radical in a stratocumulus-topped marine boundary layer from sea-to-air eddy covariance flux measurements of dimethylsulfide
hydroxyl radical stratocumulus-topped marine boundary layer sea-to-air eddy covariance flux measurements
2009/12/31
The hydroxyl radical (OH) is an important oxidant in the troposphere due to its high reactivity and relative abundance. Measuring the concentration of OH in situ, however, is technically challenging. ...
Eddy covariance methane measurements at a Ponderosa pine plantation in CaliforniaEddy covariance methane measurements at a Ponderosa pine plantation in California
Eddy covariance methane measurements Ponderosa pine plantation California
2009/11/19
Long term methane flux measurements have been mostly performed with plant or soil enclosure techniques on specific components of an ecosystem. New fast response methane analyzers make it possible to u...
Eddy covariance flux measurements of pollutant gases in urban Mexico City
Eddy covariance flux measurements pollutant gases urban Mexico City
2009/10/9
Eddy covariance (EC) flux measurements of the atmosphere/surface exchange of gases over an urban area are a direct way to improve and evaluate emissions inventories, and, in turn, to better understand...
Mixing ratios and eddy covariance flux measurements of volatile organic compounds from an urban canopy
Mixing ratios eddy covariance flux measurements volatile organic urban canopy
2009/3/31
Mixing ratios and fluxes of six selected volatile organic compounds (VOCs) were measured above the city of Manchester (UK) during the summer of 2006. A proton transfer reaction-mass spectrometer was u...
Eddy covariance fluxes of acyl peroxy nitrates (PAN, PPN and MPAN) above a Ponderosa pine forest
Eddy covariance fluxes acyl peroxy nitrates PAN PPN MPAN Ponderosa pine forest
2009/3/12
During the Biosphere Effects on AeRosols and Photochemistry EXperiment 2007 (BEARPEX-2007), we observed eddy covariance (EC) fluxes of speciated acyl peroxy nitrates (APNs), including peroxyacetyl nit...
Virtual disjunct eddy covariance measurements of organic compound fluxes from a subalpine forest using proton transfer reaction mass spectrometry
Virtual disjunct eddy covariance subalpine forest proton transfer reaction mass spectrometry
2009/3/12
A `virtual' disjunct eddy covariance (vDEC) device was tested with field measurements of biogenic VOC fluxes at a subalpine forest site in the Rocky Mountains of the USA. A PTR-MS instrument was used ...
Eddy covariance flux measurements of biogenic VOCs during ECHO 2003 using proton transfer reaction mass spectrometry
Eddy covariance flux measurements biogenic VOCs proton transfer reaction mass spectrometry
2009/2/6
Within the framework of the AFO 2000 project ECHO, two PTR-MS instruments were operated in combination with sonic anemometers to determine biogenic VOC fluxes from a mixed deciduous forest site in Nor...
Eddy covariance measurements and parameterisation of traffic related particle emissions in an urban environment
Eddy covariance measurement traffic related particle emissions urban environment
2009/1/4
Urban aerosol sources are important due to the health effects of particles and their potential impact on climate. Our aim has been to quantify and parameterise the urban aerosol source number flux F (...
Size-segregated fluxes of mineral dust from a desert area of northern China by eddy covariance
fluxes mineral dust desert area northern China eddy covariance
2008/12/11
Mineral dust emission accounts for a substantial portion of particles present in the troposphere. It is emitted mostly from desert areas, mainly through intense storm episodes. The aim of this work w...
Eddy covariance measurements of sea spray particles over the Atlantic Ocean
Eddy covariance sea spray atlantic ocean
2008/10/28
Most estimates of sea spray aerosol source functions have used indirect means to infer the rate of production as a function of wind speed. Only recently has the technology become available to make hi...
A compact and stable eddy covariance set-up for methane measurements using off-axis integrated cavity output spectroscopy
compact stable eddy covariance set-up methane measurements off-axis spectroscopy
2008/10/27
A Fast Methane Analyzer (FMA) is assessed for its applicability in a closed path eddy covariance field set-up in a peat meadow. The FMA uses off-axis integrated cavity output spectroscopy combined wit...