Zobrazeno 1 - 10
of 776
pro vyhledávání: '"A. G. Howell"'
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 13849-13864 (2024)
Aerosol hygroscopicity plays a vital role in aerosol radiative forcing. One key parameter describing hygroscopicity is the scattering enhancement factor, f(RH), defined as the ratio of the scattering coefficient at humidified relative humidity (RH) t
Externí odkaz:
https://doaj.org/article/dd65d9bd6fde49ec9a743deef9fdffc6
Autor:
K. Pistone, E. M. Wilcox, P. Zuidema, M. Giordano, J. Podolske, S. E. LeBlanc, M. Kacenelenbogen, S. G. Howell, S. Freitag
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 7983-8005 (2024)
The springtime atmosphere over the southeast Atlantic Ocean (SEA) is subjected to a consistent layer of biomass burning (BB) smoke from widespread fires on the African continent. An elevated humidity signal is coincident with this layer, consistently
Externí odkaz:
https://doaj.org/article/148b0df5a85643809ff131042b5d04ad
Autor:
C. Howes, P. E. Saide, H. Coe, A. Dobracki, S. Freitag, J. M. Haywood, S. G. Howell, S. Gupta, J. Uin, M. Kacarab, C. Kuang, L. R. Leung, A. Nenes, G. M. McFarquhar, J. Podolske, J. Redemann, A. J. Sedlacek, K. L. Thornhill, J. P. S. Wong, R. Wood, H. Wu, Y. Zhang, J. Zhang, P. Zuidema
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 13911-13940 (2023)
A large part of the uncertainty in climate projections comes from uncertain aerosol properties and aerosol–cloud interactions as well as the difficulty in remotely sensing them. The southeastern Atlantic functions as a natural laboratory to study b
Externí odkaz:
https://doaj.org/article/f1e5411481b04f4793d422cdd65e015b
Publikováno v:
Journal of Avian Biology, Vol 2024, Iss 3-4, Pp n/a-n/a (2024)
Externí odkaz:
https://doaj.org/article/5e6640d4343a4682acb933667a2baa16
Autor:
A. Dobracki, P. Zuidema, S. G. Howell, P. Saide, S. Freitag, A. C. Aiken, S. P. Burton, A. J. Sedlacek III, J. Redemann, R. Wood
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 4775-4799 (2023)
Aerosol over the remote southeastern Atlantic is some of the most sunlight-absorbing aerosol on the planet: the in situ free-tropospheric single-scattering albedo at the 530 nm wavelength (SSA530 nm) ranges from 0.83 to 0.89 within ORACLES (ObseRvati
Externí odkaz:
https://doaj.org/article/6725e926c90b47fea29c391a749aba6c
Autor:
L. Zhang, M. Segal-Rozenhaimer, H. Che, C. Dang, A. J. Sedlacek III, E. R. Lewis, A. Dobracki, J. P. S. Wong, P. Formenti, S. G. Howell, A. Nenes
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 9199-9213 (2022)
Biomass burning emissions often contain brown carbon (BrC), which represents a large family of light-absorbing organics that are chemically complex, thus making it difficult to estimate their absorption of incoming solar radiation, resulting in large
Externí odkaz:
https://doaj.org/article/68255d04437a4eb9bcbce1c4541c19a2
Autor:
S. J. Doherty, P. E. Saide, P. Zuidema, Y. Shinozuka, G. A. Ferrada, H. Gordon, M. Mallet, K. Meyer, D. Painemal, S. G. Howell, S. Freitag, A. Dobracki, J. R. Podolske, S. P. Burton, R. A. Ferrare, C. Howes, P. Nabat, G. R. Carmichael, A. da Silva, K. Pistone, I. Chang, L. Gao, R. Wood, J. Redemann
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 1-46 (2022)
Biomass burning smoke is advected over the southeastern Atlantic Ocean between July and October of each year. This smoke plume overlies and mixes into a region of persistent low marine clouds. Model calculations of climate forcing by this plume vary
Externí odkaz:
https://doaj.org/article/41dfa1521de44b3e8c8c8e93020d96ee
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 7381-7404 (2021)
The ultra-high-sensitivity aerosol spectrometer (UHSAS) differs from most other optical particle spectrometers by using a high-power infrared (IR) laser to detect small particles and reduce the sizing ambiguity due to the non-monotonicity of scatteri
Externí odkaz:
https://doaj.org/article/1454b371c65d43b6aa5a2a3926ae7a5e
Autor:
R. M. Miller, G. M. McFarquhar, R. M. Rauber, J. R. O'Brien, S. Gupta, M. Segal-Rozenhaimer, A. N. Dobracki, A. J. Sedlacek, S. P. Burton, S. G. Howell, S. Freitag, C. Dang
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 14815-14831 (2021)
During the 3 years of the ObseRvations of Aerosols above CLouds and their intEractionS (ORACLES) campaign, the NASA Orion P-3 was equipped with a 2D stereo (2D-S) probe that imaged particles with maximum dimension (D) ranging from 10 < D < 1280 µm.
Externí odkaz:
https://doaj.org/article/5f307640dc2648daa35f764c8b6269be
Autor:
Lachlan G. Howell, Blake M. Allan, Don A. Driscoll, Daniel Ierodiaconou, Todd A. Doran, Michael A. Weston
Publikováno v:
Drones, Vol 7, Iss 8, p 497 (2023)
Remotely piloted aircraft systems (RPAS, or ‘drones’ hereafter) have potential for surveying waterbird species and habitats, but there is a risk that the disturbance from drones could compromise count accuracy and bird welfare. We examined the re
Externí odkaz:
https://doaj.org/article/7c23830a29dc41d193d0d2315e3ddcea