Zobrazeno 1 - 10
of 1 602
pro vyhledávání: '"Gettelman, A."'
The sensitivity of cloud feedbacks to atmospheric model parameters is evaluated using a CAM6 perturbed parameter ensemble (PPE). The CAM6 PPE perturbs 45 parameters across 262 simulations, 206 of which are used here. The spread in total cloud feedbac
Externí odkaz:
http://arxiv.org/abs/2310.08665
Autor:
J. Mülmenstädt, E. Gryspeerdt, S. Dipu, J. Quaas, A. S. Ackerman, A. M. Fridlind, F. Tornow, S. E. Bauer, A. Gettelman, Y. Ming, Y. Zheng, P.-L. Ma, H. Wang, K. Zhang, M. W. Christensen, A. C. Varble, L. R. Leung, X. Liu, D. Neubauer, D. G. Partridge, P. Stier, T. Takemura
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 7331-7345 (2024)
General circulation models' (GCMs) estimates of the liquid water path adjustment to anthropogenic aerosol emissions differ in sign from other lines of evidence. This reduces confidence in estimates of the effective radiative forcing of the climate by
Externí odkaz:
https://doaj.org/article/55bdcc9ea1de4f44826ec77776bf8ff1
Autor:
P. M. Forster, C. Smith, T. Walsh, W. F. Lamb, R. Lamboll, B. Hall, M. Hauser, A. Ribes, D. Rosen, N. P. Gillett, M. D. Palmer, J. Rogelj, K. von Schuckmann, B. Trewin, M. Allen, R. Andrew, R. A. Betts, A. Borger, T. Boyer, J. A. Broersma, C. Buontempo, S. Burgess, C. Cagnazzo, L. Cheng, P. Friedlingstein, A. Gettelman, J. Gütschow, M. Ishii, S. Jenkins, X. Lan, C. Morice, J. Mühle, C. Kadow, J. Kennedy, R. E. Killick, P. B. Krummel, J. C. Minx, G. Myhre, V. Naik, G. P. Peters, A. Pirani, J. Pongratz, C.-F. Schleussner, S. I. Seneviratne, S. Szopa, P. Thorne, M. V. M. Kovilakam, E. Majamäki, J.-P. Jalkanen, M. van Marle, R. M. Hoesly, R. Rohde, D. Schumacher, G. van der Werf, R. Vose, K. Zickfeld, X. Zhang, V. Masson-Delmotte, P. Zhai
Publikováno v:
Earth System Science Data, Vol 16, Pp 2625-2658 (2024)
Intergovernmental Panel on Climate Change (IPCC) assessments are the trusted source of scientific evidence for climate negotiations taking place under the United Nations Framework Convention on Climate Change (UNFCCC). Evidence-based decision-making
Externí odkaz:
https://doaj.org/article/ef7ee21c7458401c81ff5b10b2209055
Autor:
A. Gettelman, M. W. Christensen, M. S. Diamond, E. Gryspeerdt, P. Manshausen, P. Stier, D. Watson‐Parris, M. Yang, M. Yoshioka, T. Yuan
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 15, Pp n/a-n/a (2024)
Abstract Ships brighten low marine clouds from emissions of sulfur and aerosols, resulting in visible “ship tracks”. In 2020, new shipping regulations mandated an ∼80% reduction in the allowed fuel sulfur content. Recent observations indicate t
Externí odkaz:
https://doaj.org/article/2bedffd775dd451dabfd9666f0f7090e
Publikováno v:
Journal of Advances in Modeling Earth Systems, Vol 16, Iss 6, Pp n/a-n/a (2024)
Abstract A single column model with parameterized large‐scale (LS) dynamics is used to better understand the response of steady‐state tropical precipitation to relative sea surface temperature under various representations of radiation, convectio
Externí odkaz:
https://doaj.org/article/1c22ce40e040422b9b859c96c13b2ab4
Autor:
Ci Song, Daniel T. McCoy, Trude Eidhammer, Andrew Gettelman, Isabel L. McCoy, Duncan Watson‐Parris, Casey J. Wall, Gregory Elsaesser, Robert Wood
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 11, Pp n/a-n/a (2024)
Abstract Aerosol‐cloud interactions (ACI) in warm clouds are the primary source of uncertainty in effective radiative forcing (ERF) during the historical period and, by extension, inferred climate sensitivity. The ERF due to ACI (ERFaci) is compose
Externí odkaz:
https://doaj.org/article/34278c1c20584837b725878243dd7fc9
Autor:
A. Gettelman
Publikováno v:
Geoscientific Model Development, Vol 16, Pp 4937-4956 (2023)
Earth system models (ESMs) must represent processes below the grid scale of a model using representations (parameterizations) of physical and chemical processes. As a tutorial exercise to understand diagnostics and parameterization, this work present
Externí odkaz:
https://doaj.org/article/7ada6c22e8c14f14819f4318b87607a8
Autor:
K. Sakaguchi, L. R. Leung, C. M. Zarzycki, J. Jang, S. McGinnis, B. E. Harrop, W. C. Skamarock, A. Gettelman, C. Zhao, W. J. Gutowski, S. Leak, L. Mearns
Publikováno v:
Geoscientific Model Development, Vol 16, Pp 3029-3081 (2023)
Comprehensive assessment of climate datasets is important for communicating model projections and associated uncertainties to stakeholders. Uncertainties can arise not only from assumptions and biases within the model but also from external factors s
Externí odkaz:
https://doaj.org/article/a3d3194d059f4240b68a5866133d299b
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Autor:
A. Gettelman, H. Morrison, T. Eidhammer, K. Thayer-Calder, J. Sun, R. Forbes, Z. McGraw, J. Zhu, T. Storelvmo, J. Dennis
Publikováno v:
Geoscientific Model Development, Vol 16, Pp 1735-1754 (2023)
Cloud microphysics is critical for weather and climate prediction. In this work, we document updates and corrections to the cloud microphysical scheme used in the Community Earth System Model (CESM) and other models. These updates include a new nomen
Externí odkaz:
https://doaj.org/article/c0aba8d98bda454d8d669c7ea601b721