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Akademický článek

Vertical structure of a springtime smoky and humid troposphere over the southeast Atlantic from aircraft and reanalysis

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

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Akademický článek

Retrieving UV–Vis spectral single-scattering albedo of absorbing aerosols above clouds from synergy of ORACLES airborne and A-train sensors

Autor: H. T. Jethva, O. Torres, R. A. Ferrare, S. P. Burton, A. L. Cook, D. B. Harper, C. A. Hostetler, J. Redemann, V. Kayetha, S. LeBlanc, K. Pistone, L. Mitchell, C. J. Flynn

Publikováno v: Atmospheric Measurement Techniques, Vol 17, Pp 2335-2366 (2024)

Inadequate knowledge about the complex microphysical and optical processes of the aerosol–cloud system severely restricts our ability to quantify the resultant impact on climate. Contrary to the negative radiative forcing (cooling) exerted by aeros

Externí odkaz: https://doaj.org/article/5dd386ab5cb441c79ce4b0a2100b5d15

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Akademický článek

On the differences in the vertical distribution of modeled aerosol optical depth over the southeastern Atlantic

Publikováno v: Atmospheric Chemistry and Physics, Vol 23, Pp 4283-4309 (2023)

The southeastern Atlantic is home to an expansive smoke aerosol plume overlying a large cloud deck for approximately a third of the year. The aerosol plume is mainly attributed to the extensive biomass burning activities that occur in southern Africa

Externí odkaz: https://doaj.org/article/d59a11d063204fe9ae28d439d9428458

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Akademický článek

Modeled and observed properties related to the direct aerosol radiative effect of biomass burning aerosol over the southeastern Atlantic

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

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Akademický článek

Biomass burning aerosol heating rates from the ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) 2016 and 2017 experiments

Autor: S. P. Cochrane, K. S. Schmidt, H. Chen, P. Pilewskie, S. Kittelman, J. Redemann, S. LeBlanc, K. Pistone, M. Segal Rozenhaimer, M. Kacenelenbogen, Y. Shinozuka, C. Flynn, R. Ferrare, S. Burton, C. Hostetler, M. Mallet, P. Zuidema

Publikováno v: Atmospheric Measurement Techniques, Vol 15, Pp 61-77 (2022)

Aerosol heating due to shortwave absorption has implications for local atmospheric stability and regional dynamics. The derivation of heating rate profiles from space-based observations is challenging because it requires the vertical profile of relev

Externí odkaz: https://doaj.org/article/2e93f714ea7645c29ddb01af927963ee

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Akademický článek

Airborne and ground-based measurements of aerosol optical depth of freshly emitted anthropogenic plumes in the Athabasca Oil Sands Region

Autor: K. Baibakov, S. LeBlanc, K. Ranjbar, N. T. O'Neill, M. Wolde, J. Redemann, K. Pistone, S.-M. Li, J. Liggio, K. Hayden, T. W. Chan, M. J. Wheeler, L. Nichman, C. Flynn, R. Johnson

Publikováno v: Atmospheric Chemistry and Physics, Vol 21, Pp 10671-10687 (2021)

In this work we report the airborne aerosol optical depth (AOD) from measurements within freshly emitted anthropogenic plumes arising from mining and processing operations in the Athabasca Oil Sands Region (AOSR) in the context of ground-based AERONE

Externí odkaz: https://doaj.org/article/add645b039c04dc186ab6cc11a85f199

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Akademický článek

Exploring the elevated water vapor signal associated with the free tropospheric biomass burning plume over the southeast Atlantic Ocean

Publikováno v: Atmospheric Chemistry and Physics, Vol 21, Pp 9643-9668 (2021)

In southern Africa, widespread agricultural fires produce substantial biomass burning (BB) emissions over the region. The seasonal smoke plumes associated with these emissions are then advected westward over the persistent stratocumulus cloud deck in

Externí odkaz: https://doaj.org/article/5d4749ebe3bb487d81f250fa7273ec48

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Akademický článek

Impact of the variability in vertical separation between biomass burning aerosols and marine stratocumulus on cloud microphysical properties over the Southeast Atlantic

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

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Akademický článek

An overview of the ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) project: aerosol–cloud–radiation interactions in the southeast Atlantic basin

Autor: J. Redemann, R. Wood, P. Zuidema, S. J. Doherty, B. Luna, S. E. LeBlanc, M. S. Diamond, Y. Shinozuka, I. Y. Chang, R. Ueyama, L. Pfister, J.-M. Ryoo, A. N. Dobracki, A. M. da Silva, K. M. Longo, M. S. Kacenelenbogen, C. J. Flynn, K. Pistone, N. M. Knox, S. J. Piketh, J. M. Haywood, P. Formenti, M. Mallet, P. Stier, A. S. Ackerman, S. E. Bauer, A. M. Fridlind, G. R. Carmichael, P. E. Saide, G. A. Ferrada, S. G. Howell, S. Freitag, B. Cairns, B. N. Holben, K. D. Knobelspiesse, S. Tanelli, T. S. L'Ecuyer, A. M. Dzambo, O. O. Sy, G. M. McFarquhar, M. R. Poellot, S. Gupta, J. R. O'Brien, A. Nenes, M. Kacarab, J. P. S. Wong, J. D. Small-Griswold, K. L. Thornhill, D. Noone, J. R. Podolske, K. S. Schmidt, P. Pilewskie, H. Chen, S. P. Cochrane, A. J. Sedlacek, T. J. Lang, E. Stith, M. Segal-Rozenhaimer, R. A. Ferrare, S. P. Burton, C. A. Hostetler, D. J. Diner, F. C. Seidel, S. E. Platnick, J. S. Myers, K. G. Meyer, D. A. Spangenberg, H. Maring, L. Gao

Publikováno v: Atmospheric Chemistry and Physics, Vol 21, Pp 1507-1563 (2021)

Southern Africa produces almost a third of the Earth's biomass burning (BB) aerosol particles, yet the fate of these particles and their influence on regional and global climate is poorly understood. ORACLES (ObseRvations of Aerosols above CLouds and

Externí odkaz: https://doaj.org/article/9a64d469bbfb4673930c0963016ac3b0

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Akademický článek

Empirically derived parameterizations of the direct aerosol radiative effect based on ORACLES aircraft observations

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

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