Zobrazeno 1 - 10
of 38
pro vyhledávání: '"L. C. Valin"'
Autor:
H. Simon, C. Hogrefe, A. Whitehill, K. M. Foley, J. Liljegren, N. Possiel, B. Wells, B. H. Henderson, L. C. Valin, G. Tonnesen, K. W. Appel, S. Koplitz
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 1855-1871 (2024)
Past work has shown that traffic patterns in the USA and resulting NOx emissions vary by day of week, with NOx emissions typically being higher on weekdays than weekends. This pattern of emissions leads to different levels of ozone on weekends versus
Externí odkaz:
https://doaj.org/article/8dbb5539221f49e49b3796b654e0118e
Autor:
M. Tzortziou, C. F. Kwong, D. Goldberg, L. Schiferl, R. Commane, N. Abuhassan, J. J. Szykman, L. C. Valin
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 2399-2417 (2022)
The COVID-19 pandemic created an extreme natural experiment in which sudden changes in human behavior and economic activity resulted in significant declines in nitrogen oxide (NOx) emissions, immediately after strict lockdowns were imposed. Here we e
Externí odkaz:
https://doaj.org/article/df0ce8866f2147d28f85253e5e1b62a6
Autor:
L. M. Judd, J. A. Al-Saadi, J. J. Szykman, L. C. Valin, S. J. Janz, M. G. Kowalewski, H. J. Eskes, J. P. Veefkind, A. Cede, M. Mueller, M. Gebetsberger, R. Swap, R. B. Pierce, C. R. Nowlan, G. G. Abad, A. Nehrir, D. Williams
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 6113-6140 (2020)
Airborne and ground-based Pandora spectrometer NO2 column measurements were collected during the 2018 Long Island Sound Tropospheric Ozone Study (LISTOS) in the New York City/Long Island Sound region, which coincided with early observations from the
Externí odkaz:
https://doaj.org/article/6b54466ffdda4e9d81210525abc85309
Autor:
L. M. Judd, J. A. Al-Saadi, S. J. Janz, M. G. Kowalewski, R. B. Pierce, J. J. Szykman, L. C. Valin, R. Swap, A. Cede, M. Mueller, M. Tiefengraber, N. Abuhassan, D. Williams
Publikováno v:
Atmospheric Measurement Techniques, Vol 12, Pp 6091-6111 (2019)
NASA deployed the GeoTASO airborne UV–visible spectrometer in May–June 2017 to produce high-resolution (approximately 250 m×250 m) gapless NO2 datasets over the western shore of Lake Michigan and over the Los Angeles Basin. The results collected
Externí odkaz:
https://doaj.org/article/dff7d5e293794cd295cd9ec09c9bb961
Autor:
S. E. Pusede, K. C. Duffey, A. A. Shusterman, A. Saleh, J. L. Laughner, P. J. Wooldridge, Q. Zhang, C. L. Parworth, H. Kim, S. L. Capps, L. C. Valin, C. D. Cappa, A. Fried, J. Walega, J. B. Nowak, A. J. Weinheimer, R. M. Hoff, T. A. Berkoff, A. J. Beyersdorf, J. Olson, J. H. Crawford, R. C. Cohen
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 2575-2596 (2016)
Nitrogen oxides (NOx) have fallen steadily across the US over the last 15 years. At the same time, NOx concentrations decrease on weekends relative to weekdays, largely without co-occurring changes in other gas-phase emissions, due to patterns of
Externí odkaz:
https://doaj.org/article/f7d7d1f200af4749ba619c2e8a69c8f8
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 1, Pp 1-9 (2014)
We examine spatial variations in the weekday–weekend pattern of NO2 over the Los Angeles metropolitan area using the Ozone Monitoring Instrument (OMI) and then compare the observations to calculations using the WRF-Chem model. We find that the spat
Externí odkaz:
https://doaj.org/article/b82566c7559540bdbbbf6493e721548d
Publikováno v:
Atmospheric Chemistry and Physics, Vol 12, Iss 24, Pp 12197-12209 (2012)
Observations of tropospheric NO2 vertical column densities over the United States (US) for 2005–2011 are evaluated using the OMI Berkeley High Resolution (BEHR) retrieval algorithm. We assess changes in NO2 on day-of-week and interannual timescales
Externí odkaz:
https://doaj.org/article/e8071915f6484c9e8f4621347c77bf83
Autor:
R. C. Hudman, N. E. Moore, A. K. Mebust, R. V. Martin, A. R. Russell, L. C. Valin, R. C. Cohen
Publikováno v:
Atmospheric Chemistry and Physics, Vol 12, Iss 16, Pp 7779-7795 (2012)
Soils have been identified as a major source (~15%) of global nitrogen oxide (NOx) emissions. Parameterizations of soil NOx emissions (SNOx) commonly used in the current generation of chemical transport models were designed to capture mean seasonal b
Externí odkaz:
https://doaj.org/article/d6fe16ea3069483bad56db7e4bc08b46
Publikováno v:
Atmospheric Chemistry and Physics, Vol 11, Iss 22, Pp 11647-11655 (2011)
Inference of NOx emissions (NO+NO2) from satellite observations of tropospheric NO2 column requires knowledge of NOx lifetime, usually provided by chemical transport models (CTMs). However, it is known that species subject to non-linear sources or si
Externí odkaz:
https://doaj.org/article/6786802d151a416e9cb55dd16f9cb641
Publikováno v:
Atmospheric Measurement Techniques, Vol 4, Iss 9, Pp 1929-1935 (2011)
We retrieve slant column NO2 from the super-zoom mode of the Ozone Monitoring Instrument (OMI) to explore its utility for understanding NOx emissions and variability. Slant column NO2 is operationally retrieved from OMI (Boersma et al., 2007; Bucsela
Externí odkaz:
https://doaj.org/article/57a8bd3fc2c24380a89aabb840502d0c