Zobrazeno 1 - 10
of 35
pro vyhledávání: '"M. W. Shephard"'
Autor:
K. E. Cady-Pereira, X. Guo, R. Wang, A. B. Leytem, C. Calkins, E. Berry, K. Sun, M. Müller, A. Wisthaler, V. H. Payne, M. W. Shephard, M. A. Zondlo, V. Kantchev
Publikováno v:
Atmospheric Measurement Techniques, Vol 17, Pp 15-36 (2024)
Ammonia is a significant precursor of PM2.5 particles and thus contributes to poor air quality in many regions. Furthermore, ammonia concentrations are rising due to the increase of large-scale, intensive agricultural activities, which are often acco
Externí odkaz:
https://doaj.org/article/454780ad7aa54a0d84c604ada7d373bb
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 4927-4946 (2023)
The Earth Cloud, Aerosol and Radiation Explorer (EarthCARE) satellite consists of active and passive sensors whose observations will be acted on by an array of retrieval algorithms. EarthCARE's retrieval algorithms have undergone pre-launch verificat
Externí odkaz:
https://doaj.org/article/4402a2b65528415087537fe5acc1ce84
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 4271-4288 (2023)
The EarthCARE satellite mission's objective is to retrieve profiles of aerosol and water cloud physical properties from measurements made by its cloud-profiling radar, backscattering lidar, and passive multi-spectral imager. These retrievals, togethe
Externí odkaz:
https://doaj.org/article/44219c56840e44428cbbc88f42aa7072
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 2319-2331 (2023)
The narrow cross section of cloud and aerosol properties retrieved by L2 algorithms that operate on data from EarthCARE's nadir-pointing sensors is broadened across-track by an algorithm that is described and demonstrated here. This scene constructio
Externí odkaz:
https://doaj.org/article/d38ac9c56c79410db5fc07ff53358d08
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 6595-6624 (2022)
An ensemble-variational inversion system is developed for the estimation of ammonia emissions using ammonia retrievals from the Cross-track Infrared Sounder (CrIS) for use in the Global Environmental Multiscale – Modelling Air quality and Chemistry
Externí odkaz:
https://doaj.org/article/52e55e8f2f764627b58e5de8e580866f
Autor:
S. van der Graaf, E. Dammers, A. Segers, R. Kranenburg, M. Schaap, M. W. Shephard, J. W. Erisman
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 951-972 (2022)
Atmospheric levels of ammonia (NH3) have substantially increased during the last century, posing a hazard to both human health and environmental quality. The atmospheric budget of NH3, however, is still highly uncertain due to an overall lack of obse
Externí odkaz:
https://doaj.org/article/de22971bf9b543438394e148722a299a
Autor:
N. Evangeliou, Y. Balkanski, S. Eckhardt, A. Cozic, M. Van Damme, P.-F. Coheur, L. Clarisse, M. W. Shephard, K. E. Cady-Pereira, D. Hauglustaine
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 4431-4451 (2021)
In recent years, ammonia emissions have been continuously increasing, being almost 4 times higher than in the 20th century. Although an important species, as its use as a fertilizer sustains human living, ammonia has major consequences for both human
Externí odkaz:
https://doaj.org/article/337d9d4cdeea42c990fe6f2b5c9a6542
Autor:
M. W. Shephard, E. Dammers, K. E. Cady-Pereira, S. K. Kharol, J. Thompson, Y. Gainariu-Matz, J. Zhang, C. A. McLinden, A. Kovachik, M. Moran, S. Bittman, C. E. Sioris, D. Griffin, M. J. Alvarado, C. Lonsdale, V. Savic-Jovcic, Q. Zheng
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 2277-2302 (2020)
Despite its clear importance, the monitoring of atmospheric ammonia, including its sources, sinks, and links to the greater nitrogen cycle, remains limited. Satellite data are helping to fill the gap in monitoring from sporadic conventional ground- a
Externí odkaz:
https://doaj.org/article/bc9d29c76b494b29b4256c2e743262bd
Autor:
C. Viatte, T. Wang, M. Van Damme, E. Dammers, F. Meleux, L. Clarisse, M. W. Shephard, S. Whitburn, P. F. Coheur, K. E. Cady-Pereira, C. Clerbaux
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 577-596 (2020)
The Paris megacity experiences frequent particulate matter (i.e.PM2.5, particulate matter with a diameter less than 2.5 µm) pollution episodes in spring (March–April). At this time of the year, large numbers of the particles consist of ammonium
Externí odkaz:
https://doaj.org/article/65dd2575e8554229ab96f9ad0522eadf
Autor:
E. Dammers, C. A. McLinden, D. Griffin, M. W. Shephard, S. Van Der Graaf, E. Lutsch, M. Schaap, Y. Gainairu-Matz, V. Fioletov, M. Van Damme, S. Whitburn, L. Clarisse, K. Cady-Pereira, C. Clerbaux, P. F. Coheur, J. W. Erisman
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 12261-12293 (2019)
Ammonia (NH3) is an essential reactive nitrogen species in the biosphere and through its use in agriculture in the form of fertilizer (important for sustaining humankind). The current emission levels, however, are up to 4 times higher than in the pre
Externí odkaz:
https://doaj.org/article/a41ba1e472e743c48e7ebc5664b75909