Zobrazeno 1 - 10
of 50
pro vyhledávání: '"John D. Ray"'
Autor:
John D. Ray
Publikováno v:
The Scientific World Journal, Vol 1, Pp 483-497 (2001)
The National Park Service (NPS) has tested and used passive ozone samplers for several years to get baseline values for parks and to determine the spatial variability within parks. Experience has shown that the Ogawa passive samplers can provide ±10
Externí odkaz:
https://doaj.org/article/ed20e554f75d4d4c89bfc7615114d7d8
Publikováno v:
Atmospheric Environment. 87:95-107
Surface ozone concentrations are high throughout Joshua Tree National Park (JOTR), as demonstrated by direct monitoring at multiple sites within JOTR. Multiple years of data from continuous ozone monitors and passive samplers indicate that the highes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e182c085a50f383dbec56ad590226b69
https://doi.org/10.1016/j.atmosenv.2013.12.043
https://doi.org/10.1016/j.atmosenv.2013.12.043
Autor:
Susan Schilling, Andrzej Bytnerowicz, Ricardo Cisneros, Donald Schweizer, Joel D. Burley, Deanna Dulen, Christopher Beck, John D. Ray, Bianca Auble, Haiganoush K. Preisler
Publikováno v:
Atmospheric Environment. 65:129-141
Surface ozone (O3) was measured at the Devils Postpile National Monument (DEPO), eastern Sierra Nevada Mountains, California, during the 2007 (low-fire) and 2008 (high-fire) summer seasons. While mean and median values of O3 concentrations for the 20
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b588f801fd5d8e71cd352e5a6e1c634
https://doi.org/10.1016/j.atmosenv.2012.10.024
https://doi.org/10.1016/j.atmosenv.2012.10.024
Autor:
Anne M. Thompson, S. J. Oltmans, John D. Ray, Heini Wernli, L. Patrick, Paul C. Novelli, Jonathan Davies, Beverly J. Johnson, Colm Sweeney, Allen S. Lefohn, Brent N. Holben, Anne Jefferson, Stephen A. Montzka, Tom Dann, J. M. Harris, Melvyn A. Shapiro, David W. Tarasick
Publikováno v:
Atmospheric Environment. 44:4497-4509
During April 2008, as part of the International Polar Year (IPY), a number of ground-based and aircraft campaigns were carried out in the North American Arctic region (e.g., ARCTAS, ARCPAC). The widespread presence during this period of biomass burni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ccfab4db76edfdaea95f5ff425305427
https://doi.org/10.1016/j.atmosenv.2010.07.004
https://doi.org/10.1016/j.atmosenv.2010.07.004
Publikováno v:
Journal of the Air & Waste Management Association. 59:936-942
As part of the National Park Service's Temporary Winter Use Plans Environmental Assessment, the University of Denver has been collecting in-use tailpipe emissions data from snowcoaches and snowmobiles in Yellowstone National Park. During the winter o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06daae6b56c8fcb62251d9fbe00125f9
https://doi.org/10.3155/1047-3289.59.8.936
https://doi.org/10.3155/1047-3289.59.8.936
Autor:
John D. Ray, Joel D. Burley
Publikováno v:
Atmospheric Environment. 41:6048-6062
During the summers of 2003 and 2005, surface ozone concentrations were measured with portable ozone monitors at multiple locations in and around Yosemite National Park. The goal of these measurements was to obtain a comprehensive survey of ozone with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40aede4f08ee66a9b345b785e4c00304
https://doi.org/10.1016/j.atmosenv.2007.03.021
https://doi.org/10.1016/j.atmosenv.2007.03.021
Autor:
Daniel A. Jaffe, John D. Ray
Publikováno v:
Atmospheric Environment. 41:5452-5463
We evaluated O3 data for the period 1987–2004 from 11 rural and remote sites in the north and western US, including two sites in Alaska. All sites show a seasonal cycle with a spring or spring-summer maximum. By deseasonalizing the data, we are bet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ff88daa41a08fd6f9d765ff19f8b9e1
https://doi.org/10.1016/j.atmosenv.2007.02.034
https://doi.org/10.1016/j.atmosenv.2007.02.034
Publikováno v:
Atmospheric Environment. 39:315-327
We present in this study both measurement-based and modeling analyses for elucidation of source attribution, influence areas, and process budget of reactive nitrogen oxides at two rural southeast United States sites (Great Smoky Mountains national pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7dfcc1cf30bfd65c6c340122434825a4
https://doi.org/10.1016/j.atmosenv.2004.09.035
https://doi.org/10.1016/j.atmosenv.2004.09.035
Publikováno v:
Atmospheric Environment. 38:4969-4974
In airsheds that contain high volatile organic compounds (VOCs) and low NOx (=NO+NO2) concentrations, ozone (O3) production may be significantly suppressed by NOx reactions that lead to the formation of organic nitrates. O3 and its precursors (VOCs a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0b26f687683c06db3d69028dd6e461f
https://doi.org/10.1016/j.atmosenv.2004.05.054
https://doi.org/10.1016/j.atmosenv.2004.05.054
Autor:
H. Christopher Frey, John D. Ray, Brent G. Schuchmann, Brandon M. Graver, Gary A. Bishop, Gurdas S. Sandhu, Jiangchuan Hu
Publikováno v:
Environmental sciencetechnology. 48(14)
As input to a winter use plan, activity, fuel use, and tailpipe exhaust emissions of over snow vehicles (OSV), including five snow coaches and one snowmobile, were measured on a designated route in Yellowstone National Park (YNP). Engine load was qua
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b41ac109c3c28235d5ea06d29d1078da
https://pubmed.ncbi.nlm.nih.gov/24945058
https://pubmed.ncbi.nlm.nih.gov/24945058