· This sensor, based on the chemiluminescence principle, is used to measure the ozone flux over the ocean by direct eddy correlation (EC). The study area of the Gulf of Mexico represents an interesting data set for both ocean and land footprints. This poster presents the technique used to do ozone flux measurements, and the recent progress made ...
This sensor, based on the chemiluminescence principle, combined with other turbulence instrumentation, is used to measure the airsea flux of ozone by direct eddy correlation. This instrument has been previously deployed on 200607 cruises in the Gulf of Mexico (TexAQS / GOMECC) and in the Eastern Pacific Ocean (Stratus). Here, we present the measurement technique and recent progress made in ...
· Comparison of EC ozone flux determination with FG method and literature ... A novel ozone sensor for direct eddy flux measurements. Journal of Atmospheric Chemistry, 14 (1992), pp. 7384. View Record in Scopus Google Scholar. Hammerle et al., 2008. A. Hammerle, A. Haslwanter, U. Tappeiner, A. Cernusca, G. Wohlfahrt. Leaf area controls on energy partitioning of a temperate …
· A FAST RESPONSE SENSOR FOR OZONE EDDYCORRELATION FLUX MEASUREMENTS* J. A. EASTMAN and D. H. STEDMAN Department of Atmospheric and Oceanic Science, University of Michigan, Ann Arbor, Michigan 48109, (First received 12 July 1976 and in final form 10 May 1977) Abstracthe measurement of fluxes of gaseous pollutants to the ground may be made using eddy …
· A small, lightweight ( kg) and fastresponse ozone sensor for direct eddy flux measurements has been built. The basis for detection is the chemiluminescence of an organic dye adsorbed on dry silica gel in the reaction with ozone. The chemiluminescence is monitored with a cheap and small bluesensitive photomultiplier. At a flow rate of 100 l min1 the ozone sensor has a 90% …
· Sensitivity measurements for different sensors indicated that, within an ozone concentration range of 10–1500 ppb, the sensitivity of coumarin 47–based sensors remained constant, while that of rodamin B–based sensors increased from 10 to 80 ppb, subsequently remaining constant. For sensors using coumarin 30 an increase in sensitivity was detected in the 10–60ppb range. Thus, …
Simultaneous surface layer ozone flux measurements by eddy flux and profile methods are reported with supporting micrometeorological data. The results show a close correspondence between the eddy …
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Simultaneous surface layer ozone flux measurements by eddy flux and profile methods are reported with supporting micrometeorological data. The results show a close correspondence between the eddy diffusivities of ozone and sensible heat rather than momentum eddy diffusivity. Ozone deposition velocities are computed both from the eddy flux and profile fluxes of ozone. As with eddy diffusivities ...
· Ozone (O3) fluxes above a temperate mountain grassland were measured by means of the eddy covariance (EC) method using a slowresponse O3analyser. The resultant flux loss was corrected for by a series of transfer functions which model the various sources of high and, in …
Sources of uncertainty in eddy covariance ozone flux measurements made by dry chemiluminescence fast response analysers. Atmospheric Measurement Techniques 2010, 3 (1) , 163176.
This has been demonstrated in an EC study utilizing a closed path H 2 O sensor for EC flux measurements (through an 18 m long, cm inlet, pumped at 18 slpm, comparable to the inlet used in this study) which showed complete attenuation above Hz and overall attenuation of ∼80 % of the H 2 O (latent heat) flux (Yang et al., 2016). However, without a direct measure of water vapor ...
· Online eddy correlation measurements of the vertical turbulent ozone flux to the desert were performed with a novel fastresponse ozone sensor. The fairly small ozone fluxes were corrected for effects of microturbulent density fluctuations caused by the concomitant fluxes of heat and water vapour in the air volume (Webb correction). While ozone fluxes to the desert ecosystem are below 2 …
A fast and precise chemiluminescence ozone detector for eddy flux and airborne application. Atmospheric Measurement Techniques Discussions 2011 , 4 (5) , 65396575.
A small, lightweight ( kg) and fastresponse ozone sensor for direct eddy flux measurements has been built. The basis for detection is the chemiluminescence of an organic dye adsorbed on dry ...
A fastresponse chemiluminescent ozone sensor was mounted in an aircraft instrumented for air motion and temperature measurements. Measurements of the vertical flux of ozone by the eddy correlation technique were obtained after correcting for time delay and pressure sensitivity in the ozone
Measuring eddy covariance fluxes of ozone with a slowresponse analyser Georg Wohlfahrta,*, Lukas Ho¨rtnagla, Albin Hammerlea, Martin Grausb, Armin Hanselb aInstitut fu ¨rOkologie, Universitat Innsbruck, Sternwartestr. 15, 6020 Innsbruck, Austria b Institut fu ¨r Ionenphysik und Angewandte Physik, Universitat Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
Response Sensor Suitable for Eddy Covariance Measurements Gordon A. Novak, Michael P. Vermeuel, Timothy H. Bertram 5 Department of Chemistry, University of Wisconsin – Madison, Madison, WI, USA Correspondence to: Timothy H. Bertram () Abstract. We report on the development, characterization, and field deployment of a fast time response sensor for measuring ozone …
A FAST RESPONSE SENSOR FOR OZONE EDDYCORRELATION FLUX MEASUREMENTS* J. A. EASTMAN and D. H. STEDMAN Department of Atmospheric and Oceanic Science, University of Michigan, Ann Arbor, Michigan 48109, (First received 12 July 1976 and infinalform 10 May 1977) AhmetThe measurement of fluxes of gaseous polhttants to the ground may be made using eddy …
· Thus, a trace gas flux can be directly measured by eddy covariance provided the instrumentation is sufficiently fastresponse (∼10–20 Hz) to capture the dominant range of eddy sizes contributing to the flux. 3. The Easter Bush longterm flux measurement site. Ozone flux measurements using the gradient and eddy covariance technique were made at a grassland site …
A FAST RESPONSE SENSOR FOR OZONE EDDYCORRELATION FLUX MEASUREMENTS* J. A. EASTMAN and D. H. STEDMAN Department of Atmospheric and Oceanic Science, University of Michigan, Ann Arbor, Michigan 48109, (First received 12 July 1976 and infinalform 10 May 1977) AhmetThe measurement of fluxes of gaseous polhttants to the ground may be made using eddy …
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