Výsledky vyhledávání - "Christine A. Ennis"

Akademický článek

Global Ozone (GO3) Project and AQTreks: Use of evolving technologies by students and citizen scientists to monitor air pollutants

Autor: Jessa A. Ellenburg, Craig J. Williford, Shannon L. Rodriguez, Peter C. Andersen, Andrew A. Turnipseed, Christine A. Ennis, Kali A. Basman, Jessica M. Hatz, Jason C. Prince, Drew H. Meyers, David J. Kopala, Michael J. Samon, Kodi J. Jaspers, Boden J. Lanham, Brian J. Carpenter, John W. Birks

Publikováno v: Atmospheric Environment: X, Vol 4, Iss , Pp - (2019)

Over the past decade, new and emerging technologies in air pollution instrumentation have made it possible to involve students and citizen scientists in air pollution monitoring. Similarly, advances in data communication and transmission have made it

Externí odkaz: https://doaj.org/article/e9290f88267a4410a89422b72b9ed13a

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Portable calibrator for NO based on the photolysis of N2O and a combined NO2∕NO∕O3 source for field calibrations of air pollution monitors

Autor: Peter C. Andersen, Andrew A. Turnipseed, Stanley Strunk, John W. Birks, Christine A. Ennis, Craig J. Williford, Brian J. Carpenter

Publikováno v: Atmospheric Measurement Techniques. 13:1001-1018

A highly portable calibration source of nitric oxide (NO) based on the photolysis of nitrous oxide ( N2O ) supplied by 8 or 16 g disposable cartridges is demonstrated to serve as an accurate and reliable transfer standard for the calibration of NO mo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d9e64abfdbcd8bfb26537964c75e9448
https://doi.org/10.5194/amt-13-1001-2020

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Use of a heated graphite scrubber as a means of reducing interferences in UV-absorbance measurements of atmospheric ozone

Autor: Andrew A. Turnipseed, Christine A. Ennis, John W. Birks, Craig J. Williford, Peter C. Andersen

Publikováno v: Atmospheric Measurement Techniques, Vol 10, Pp 2253-2269 (2017)

A new solid-phase scrubber for use in conventional ozone (O3) photometers was investigated as a means of reducing interferences from other UV-absorbing species and water vapor. It was found that when heated to 100–130 °C, a tubular graphite scrubb

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7627afe138993bd0d9e5856f04835694
http://www.atmos-meas-tech.net/10/2253/2017/amt-10-2253-2017.pdf

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Portable Calibrator for NO Based on Photolysis of N2O and a Combined NO2/NO/O3 Source for Field Calibrations of Air Pollution Monitors

Autor: John W. Birks, Andrew A. Turnipseed, Peter C. Andersen, Craig J. Williford, Stanley Strunk, Brian Carpenter, Christine A. Ennis

A highly portable calibration source of nitric oxide (NO) based on photolysis of nitrous oxide (N2O) supplied by 8- or 16-g disposable cartridges is demonstrated to serve as an accurate and reliable transfer standard for the calibration of NO monitor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4b18c6b048341de4a16230d04f0ed238
https://doi.org/10.5194/amt-2019-399

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Portable Ozone Calibration Source Independent of Changes in Temperature, Pressure and Humidity for Research and Regulatory Applications

Autor: Stanley Strunk, Andrew A. Turnipseed, Christine A. Ennis, Craig J. Williford, John W. Birks, Peter C. Andersen

Publikováno v: Atmospheric Measurement Techniques, Vol 11, Pp 4797-4807 (2018)

A highly portable ozone (O3) calibration source that can serve as a U.S. EPA level 4 transfer standard for the calibration of ozone analyzers is described and evaluated with respect to analytical figures of merit and effects of ambient pressure and h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ae8926ca52c9997f838f91c1392bc1d
https://doi.org/10.5194/amt-2018-110

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Folded Tubular Photometer for atmospheric measurements of NO2 and NO

Autor: Erick Mattson, Christine A. Ennis, Craig J. Williford, John W. Birks, Peter C. Andersen, Stanley Strunk, Andrew A. Turnipseed

We describe and characterize a modular folded tubular photometer for making direct measurements of the concentrations of nitrogen dioxide (NO2) and specify how this method could be extended to measure other pollutants such as sulfur dioxide (SO2), oz

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::96d72fc13b7358c968e4b8cbcab45929
https://doi.org/10.5194/amt-2018-24

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Global Ozone (GO3) Project and AQTreks: Use of evolving technologies by students and citizen scientists to monitor air pollutants

Autor: Kali A. Basman, Brian J. Carpenter, John W. Birks, Christine A. Ennis, Boden J. Lanham, Andrew A. Turnipseed, Peter C. Andersen, Jason C. Prince, Michael J. Samon, David J. Kopala, Jessa A. Ellenburg, Kodi J. Jaspers, Craig J. Williford, Shannon L. Rodriguez, Drew H. Meyers, Jessica M. Hatz

Publikováno v: Atmospheric Environment: X, Vol 4, Iss, Pp-(2019)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5730e967a4c30f30bd0c04d383462c2f
https://doi.org/10.1016/j.aeaoa.2019.100048

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A branch chamber system and techniques for simultaneous pollutant exposure experiments and gaseous flux determinations

Autor: Allan L. Lazrus, Gregory L. Kok, Christine A. Ennis, Russell K. Monson, Patrick R. Zimmerman

Publikováno v: Tellus B; Vol 42, No 2 (1990)

We describe an experimental system and techniques for use in simultaneous pollutant exposure experiments and gaseous flux determinations. The system uses flexible Teflon bag-like chambers to enclose entire individual branches of young trees. Five gas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb88e81aaf827e330eeff81f6758a60c
https://doi.org/10.1034/j.1600-0889.1990.t01-2-00003.x

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Flux determinations and physiological response in the exposure of red spruce to gaseous hydrogen peroxide, ozone, and sulphur dioxide

Autor: Allan L. Lazrus, Christine A. Ennis, Russell K. Monson, Patrick R. Zimmerman

Publikováno v: Tellus B; Vol 42, No 2 (1990)

We report on the 3-week exposure of a branch of a forest-grown red spruce (Picea rubens) sapling to the combination of gaseous hydrogen peroxide, ozone, and sulphur dioxide. The exposure was conducted continuously using concentrations of H 2 O 2 , O

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::87b7332636d1f86f77f2c7f23059a1eb
https://doi.org/10.1034/j.1600-0889.1990.00004.x

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George C. Reid (1929–2011)

Autor: Christine A. Ennis, Fred C. Fehsenfeld, Karen H. Rosenlof, Paul J. Crutzen

Publikováno v: Eos, Transactions American Geophysical Union. 92:307-307

[1] George Colvin Reid, a pioneering solar and climate scientist, passed away at his home in Boulder, Colo., on 6 May 2011 after a brief battle with pancreatic cancer. George was 81. His legacy includes an impressive and prolific scientific career th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5f4e4d66b28ae1452de1d90f0ab8927a
https://doi.org/10.1029/2011eo370003

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