Zobrazeno 1 - 10
of 48
pro vyhledávání: '"L. N. Lamsal"'
Autor:
L. H. Yang, D. J. Jacob, N. K. Colombi, S. Zhai, K. H. Bates, V. Shah, E. Beaudry, R. M. Yantosca, H. Lin, J. F. Brewer, H. Chong, K. R. Travis, J. H. Crawford, L. N. Lamsal, J.-H. Koo, J. Kim
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 2465-2481 (2023)
Nitrogen oxides (NOx≡ NO + NO2) are of central importance for air quality, climate forcing, and nitrogen deposition to ecosystems. The Geostationary Environment Monitoring Spectrometer (GEMS) is now providing hourly NO2 satellite observations over
Externí odkaz:
https://doaj.org/article/78ec8ac36d044cfd9ff897908012878f
Autor:
V. Shah, D. J. Jacob, R. Dang, L. N. Lamsal, S. A. Strode, S. D. Steenrod, K. F. Boersma, S. D. Eastham, T. M. Fritz, C. Thompson, J. Peischl, I. Bourgeois, I. B. Pollack, B. A. Nault, R. C. Cohen, P. Campuzano-Jost, J. L. Jimenez, S. T. Andersen, L. J. Carpenter, T. Sherwen, M. J. Evans
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 1227-1257 (2023)
Satellite-based retrievals of tropospheric NO2 columns are widely used to infer NOx (≡ NO + NO2) emissions. These retrievals rely on model information for the vertical distribution of NO2. The free tropospheric background above 2 km is particularly
Externí odkaz:
https://doaj.org/article/5437956e29114505a9448b1abc87fa0e
Autor:
J. Li, Y. Wang, R. Zhang, C. Smeltzer, A. Weinheimer, J. Herman, K. F. Boersma, E. A. Celarier, R. W. Long, J. J. Szykman, R. Delgado, A. M. Thompson, T. N. Knepp, L. N. Lamsal, S. J. Janz, M. G. Kowalewski, X. Liu, C. R. Nowlan
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 11133-11160 (2021)
Nitrogen oxides (NOx = NO + NO2) play a crucial role in the formation of ozone and secondary inorganic and organic aerosols, thus affecting human health, global radiation budget, and climate. The diurnal and spatial variations in NO2 are functions of
Externí odkaz:
https://doaj.org/article/154a67bb97b04935a4536f5d60ccec55
Autor:
W. Tang, D. P. Edwards, L. K. Emmons, H. M. Worden, L. M. Judd, L. N. Lamsal, J. A. Al-Saadi, S. J. Janz, J. H. Crawford, M. N. Deeter, G. Pfister, R. R. Buchholz, B. Gaubert, C. R. Nowlan
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 4639-4655 (2021)
Sub-grid variability (SGV) in atmospheric trace gases within satellite pixels is a key issue in satellite design and interpretation and validation of retrieval products. However, characterizing this variability is challenging due to the lack of indep
Externí odkaz:
https://doaj.org/article/dc242038c5c54a23b58f3dfb5039a7af
Autor:
L. N. Lamsal, N. A. Krotkov, A. Vasilkov, S. Marchenko, W. Qin, E.-S. Yang, Z. Fasnacht, J. Joiner, S. Choi, D. Haffner, W. H. Swartz, B. Fisher, E. Bucsela
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 455-479 (2021)
We present a new and improved version (V4.0) of the NASA standard nitrogen dioxide (NO2) product from the Ozone Monitoring Instrument (OMI) on the Aura satellite. This version incorporates the most salient improvements for OMI NO2 products suggested
Externí odkaz:
https://doaj.org/article/c8f09354d45b4d1a8760bd133f007ddb
Autor:
S. Choi, L. N. Lamsal, M. Follette-Cook, J. Joiner, N. A. Krotkov, W. H. Swartz, K. E. Pickering, C. P. Loughner, W. Appel, G. Pfister, P. E. Saide, R. C. Cohen, A. J. Weinheimer, J. R. Herman
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 2523-2546 (2020)
NASA's Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ, conducted in 2011–2014) campaign in the United States and the joint NASA and National Institute of Environmenta
Externí odkaz:
https://doaj.org/article/8937e23eb4374a249d2a7dc8943e7f67
Autor:
R. F. Silvern, D. J. Jacob, L. J. Mickley, M. P. Sulprizio, K. R. Travis, E. A. Marais, R. C. Cohen, J. L. Laughner, S. Choi, J. Joiner, L. N. Lamsal
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 8863-8878 (2019)
The National Emission Inventory (NEI) of the US Environmental Protection Agency (EPA) reports a steady decrease in US NOx emissions over the 2005–2017 period at a rate of 0.1 Tg N a−1 (53 % decrease over the period), reflecting sustained
Externí odkaz:
https://doaj.org/article/0a9eb018cf1146e4b06b678167424d6a
Autor:
C. Adams, C. A. McLinden, M. W. Shephard, N. Dickson, E. Dammers, J. Chen, P. Makar, K. E. Cady-Pereira, N. Tam, S. K. Kharol, L. N. Lamsal, N. A. Krotkov
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 2577-2599 (2019)
In May 2016, the Horse River wildfire led to the evacuation of ∼ 88 000 people from Fort McMurray and surrounding areas and consumed ∼ 590 000 ha of land in Northern Alberta and Saskatchewan. Within the plume, satellite instruments meas
Externí odkaz:
https://doaj.org/article/1860600b82f5469798098e171d0b1828
Autor:
D. L. Goldberg, P. E. Saide, L. N. Lamsal, B. de Foy, Z. Lu, J.-H. Woo, Y. Kim, J. Kim, M. Gao, G. Carmichael, D. G. Streets
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 1801-1818 (2019)
In this work, we investigate the NOx emissions inventory in Seoul, South Korea, using a regional ozone monitoring instrument (OMI) NO2 product derived from the standard NASA product. We first develop a regional OMI NO2 product by recalculating the ai
Externí odkaz:
https://doaj.org/article/32b6b72c38d84e20a3dcfd9c30905ac8
Autor:
M. Zara, K. F. Boersma, I. De Smedt, A. Richter, E. Peters, J. H. G. M. van Geffen, S. Beirle, T. Wagner, M. Van Roozendael, S. Marchenko, L. N. Lamsal, H. J. Eskes
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 4033-4058 (2018)
Nitrogen dioxide (NO2) and formaldehyde (HCHO) column data from satellite instruments are used for air quality and climate studies. Both NO2 and HCHO have been identified as precursors to the ozone (O3) and aerosol essential climate variables, and
Externí odkaz:
https://doaj.org/article/fe918331a6da4057ab5592ac24759a8b