Zobrazeno 1 - 10
of 237
pro vyhledávání: '"A. Dobracki"'
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
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:
E. D. Lenhardt, L. Gao, J. Redemann, F. Xu, S. P. Burton, B. Cairns, I. Chang, R. A. Ferrare, C. A. Hostetler, P. E. Saide, C. Howes, Y. Shinozuka, S. Stamnes, M. Kacarab, A. Dobracki, J. Wong, S. Freitag, A. Nenes
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 2037-2054 (2023)
Accurately capturing cloud condensation nuclei (CCN) concentrations is key to understanding the aerosol–cloud interactions that continue to feature the highest uncertainty amongst numerous climate forcings. In situ CCN observations are sparse, and
Externí odkaz:
https://doaj.org/article/19342f11fe584daeaee5e535305c0179
Autor:
P. A. Barrett, S. J. Abel, H. Coe, I. Crawford, A. Dobracki, J. Haywood, S. Howell, A. Jones, J. Langridge, G. M. McFarquhar, G. J. Nott, H. Price, J. Redemann, Y. Shinozuka, K. Szpek, J. W. Taylor, R. Wood, H. Wu, P. Zuidema, S. Bauguitte, R. Bennett, K. Bower, H. Chen, S. Cochrane, M. Cotterell, N. Davies, D. Delene, C. Flynn, A. Freedman, S. Freitag, S. Gupta, D. Noone, T. B. Onasch, J. Podolske, M. R. Poellot, S. Schmidt, S. Springston, A. J. Sedlacek III, J. Trembath, A. Vance, M. A. Zawadowicz, J. Zhang
Publikováno v:
Atmospheric Measurement Techniques, Vol 15, Pp 6329-6371 (2022)
Data are presented from intercomparisons between two research aircraft, the FAAM BAe-146 and the NASA Lockheed P3, and between the BAe-146 and the surface-based DOE (Department of Energy) ARM (Atmospheric Radiation Measurement) Mobile Facility at Asc
Externí odkaz:
https://doaj.org/article/a689fff9cbc5453e84d5b28c57480fd5
Autor:
C. Dang, M. Segal-Rozenhaimer, H. Che, L. Zhang, P. Formenti, J. Taylor, A. Dobracki, S. Purdue, P.-S. Wong, A. Nenes, A. Sedlacek III, H. Coe, J. Redemann, P. Zuidema, S. Howell, J. Haywood
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 9389-9412 (2022)
This study characterizes single-particle aerosol composition from filters collected during the ObseRvations of Aerosols above CLouds and their intEractionS (ORACLES) and CLoud–Aerosol–Radiation Interaction and Forcing: Year 2017 (CLARIFY-2017) ca
Externí odkaz:
https://doaj.org/article/3e90d56bfb1941c08234b76942a8e875
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:
S. Gupta, G. M. McFarquhar, J. R. O'Brien, D. J. Delene, M. R. Poellot, A. Dobracki, J. R. Podolske, J. Redemann, S. E. LeBlanc, M. Segal-Rozenhaimer, K. Pistone
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 4615-4635 (2021)
Marine stratocumulus cloud properties over the Southeast Atlantic Ocean are impacted by contact between above-cloud biomass burning aerosols and cloud tops. Different vertical separations (0 to 2000 m) between the aerosol layer and cloud tops were ob
Externí odkaz:
https://doaj.org/article/c9f03028ee0b492e9507b6851a8234a5
Autor:
S. P. Cochrane, K. S. Schmidt, H. Chen, P. Pilewskie, S. Kittelman, J. Redemann, S. LeBlanc, K. Pistone, M. Kacenelenbogen, M. Segal Rozenhaimer, Y. Shinozuka, C. Flynn, A. Dobracki, P. Zuidema, S. Howell, S. Freitag, S. Doherty
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 567-593 (2021)
In this paper, we use observations from the NASA ORACLES (ObseRvations of CLouds above Aerosols and their intEractionS) aircraft campaign to develop a framework by way of two parameterizations that establishes regionally representative relationships
Externí odkaz:
https://doaj.org/article/57996c15d38b45c29070c46fb65c9e49