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Casey WallAssistant professor

Denna sida på svenska

Contact

Name and title: Casey Wall Assistant professor

casey.wall@misu.su.se

08-16 43 28

Orcid

0000-0001-7682-5576

Workplace: Department of Meteorology

Visiting address

Svante Arrhenius väg 16 C

Postal address

Meteorologiska institutionen (MISU)

106 91 Stockholm

Research groups

Dynamic Meteorology

How and why the atmosphere moves is studied within dynamic meteorology. The atmosphere is never still and its movement can be described by partial differential equations which describe how changes in speed, density, pressure and temperature occur. We study these movements from the smallest scale of turbulence to planetary waves.

Figure of atmospheric processes. From Albert A.M. Holtslag,2003: Atmospheric turbulence

Clouds, airborne particles and gases

A continued change in the atmospheric content of greenhouse gases and particles is estimated to result in future warming well above 1.5°C, compared with pre-industrial levels. It is uncertain how much heating is masked by the cooling effect of the particles, especially the effect of the particles on the distribution and properties of the clouds.

Clouds. Photo: Marianne Lagerklint/MISU/Stockholm University

About me

I work as an assistant professor at the Department of Meteorology at Stockholm University. My main research interests are clouds, aerosol particles, atmospheric circulation, and climate. Aerosol-cloud-climate interactions are a major source of uncertainty in the scientific understanding of climate change.

Research Topics

Aerosol-Cloud Interactions: How do aerosol particles affect cloud physics and dynamics? What are the key mechanisms in shallow clouds and deep convective clouds?
Aerosol Forcing: How have anthropogenic aerosols changed clouds since the preindustrial era, and how large is the effective radiative forcing of climate change? Can the forcing uncertainty be reduced with evidence from the satellite record?
Cloud Feedbacks: How has global surface warming changed clouds, and what is the associated cloud radiative feedback? Which cloud-feedback mechanisms are most important?
Cloud-Circulation Interactions: How do clouds interact with the atmospheric circulation? How do these interactions affect regional and global climate?

Research

Peer-Reviewed Publications

Ceppi, P., T.A. Myers, P. Nowack, C.J. Wall, and M.D. Zelinka, 2024: Implications of a pervasive climate model bias for low-cloud feedback. Geophysical Research Letters, https://doi.org/10.1029/2024GL110525

Quaas, J., T. Andrews, N. Bellouin, K. Block, O. Boucher, P. Ceppi, G. Dagan, S. Doktorowski, H.M. Eichholz, P. Forster, T. Goren, E. Gryspeerdt, Ø. Hodnebrog, H. Jia, R. Kramer, C. Lange, A.C. Maycock, J. Mülmenstädt, G. Myhre, F.M. O’Connor, R. Pincus, B.H. Samset, F. Senf, K.P. Shine, C. Smith, C.W. Stjern, T. Takemura, V. Toll, and C.J. Wall, 2024: Adjustments to climate perturbations – mechanisms, implications, observational constraints. AGU Advances, http://dx.doi.org/10.1029/2023AV001144

Vishny, D.N., C.J. Wall, and N.J. Lutsko, N. J., 2024: Impact of atmospheric cloud radiative effects on annular mode persistence in idealized simulations. Geophysical Research Letters, https://doi.org/10.1029/2024GL109420

Song, C., D.T. McCoy, T. Eidhammer, A. Gettelman, I.L. McCoy, D. Watson-Parris, C.J. Wall, G. Elsaesser, and R. Wood, 2024: Buffering of aerosol-cloud adjustments by coupling between radiative susceptibility and precipitation efficiency, Geophysical Research Letters, https://doi.org/10.1029/2024GL108663

Sokol, A.B., C.J. Wall, and D.L. Hartmann, 2024: Anvil Cloud Thinning Implies Greater Climate Sensitivity, Nature Geoscience, https://doi.org/10.1038/s41561-024-01420-6

Andersen, H., J. Cermak, A. Douglas, T.A. Myers, P. Nowack, P. Stier, C.J. Wall, and S.W. Kemsley, 2023: Sensitivities of Cloud Radiative Effects to Large-Scale Meteorology and Aerosols from Global Observations, Atmospheric Chemistry and Physics, https://doi.org/10.5194/egusphere-2023-1283

Wall, C.J., T. Storelvmo, and A. Possner, 2023: Global Observations of Aerosol Indirect Effects from Marine Liquid Clouds, Atmospheric Chemistry and Physics, https://doi.org/10.5194/egusphere-2023-1436

Pincus, R., P.A. Hubanks, S.A. Platnick, K. Meyer, R.E. Holz, D. Botambekov, and C.J. Wall, 2023: Updated Observations of Clouds by MODIS for Global Model Assessment, Earth System Science Data, https://doi.org/ 10.5194/essd-15-2483-2023

Lutsko, N.J., M.T. Luongo, C.J. Wall, and T.A. Myers, 2022: Correlation Between Cloud Adjustments and Cloud Feedbacks Responsible for Larger Range of Climate Sensitivities in CMIP6, Journal of Geophysical Research: Atmospheres, https://doi.org/10.1029/2022JD037486

Wall, C.J., J.R. Norris, A. Possner, D.T. McCoy, I.L. McCoy, and N.J. Lutsko, 2022: Assessing Effective Radiative Forcing from Aerosol-Cloud Interactions over the Global Ocean, Proceedings of the National Academy of Sciences of the U.S.A., https://doi.org/10.1073/pnas.2210481119

Wall, C.J., N.J. Lutsko, and D. Vishny, 2022: Revisiting Cloud Radiative Heating and the Southern Annular Mode, Geophysical Research Letters, https://doi.org/10.1029/2022GL100463

Wall, C.J., T. Storelvmo, J.R. Norris, and I. Tan, 2022: Observational Constraints on Southern Ocean Cloud-Phase Feedback, Journal of Climate, https://doi.org/10.1175/JCLI-D-21-0812.1

Gasparini, B., A.B. Sokol, C.J. Wall, D.L. Hartmann, and P.N. Blossey, 2021: Diurnal Differences in Tropical Maritime Anvil Cloud Evolution, Journal of Climate, https://doi.org/10.1175/JCLI-D-21-0211.1

Gasparini, B., P.J. Rasch, D.L. Hartmann, C.J. Wall, and M. Dütsch, 2021: A Lagrangian Perspective on Tropical Anvil Cloud Lifecycle in Present and Future Climate, Journal of Geophysical Research: Atmospheres, https://doi.org/10.1029/2020JD033487

Wall, C.J., J.R. Norris, B. Gasparini, W.L. Smith, M.M. Thieman, and O. Sourdeval, 2020: Observational Evidence that Radiative Heating Modifies the Life Cycle of Tropical Anvil Clouds, Journal of Climate, https://doi.org/10.1175/JCLI-D-20-0204.1

Wall, C.J., D.L. Hartmann, and J.R. Norris, 2019: Is the Net Cloud Radiative Effect Constrained to be Uniform over the Tropical Warm Pools? Geophysical Research Letters, https://doi.org/10.1029/ 2019GL083642

Wall, C.J., and D.L. Hartmann, 2018: Balanced Cloud Radiative Effects across a Range of Dynamical Conditions over the Tropical West Pacific, Geophysical Research Letters, https://doi.org/10.1029/ 2018GL080046

Wall, C.J., D.L. Hartmann, M.M. Thieman, W.L. Smith, and P. Minnis, 2018: The Life Cycle of Anvil Clouds and the Top-of-Atmosphere Radiation Balance over the Tropical West Pacific, Journal of Climate, https://doi.org/10.1175/JCLI-D-18-0154.1

Wall, C.J., D.L. Hartmann, and P. Ma, 2017: Instantaneous Linkages between Clouds and Large-Scale Meteorology over the Southern Ocean in Observations and a Climate Model, Journal of Climate, https://doi.org/10.1175/JCLI-D-17-0156.1

Wall, C.J., T. Kohyama, and D.L. Hartmann, 2017: Low-Cloud, Boundary Layer, and Sea Ice Interactions over the Southern Ocean during Winter, Journal of Climate, https://doi.org/10.1175/JCLI-D-16-0483.1

Kay, J.E., C.J. Wall, V. Yettella, B. Medeiros, C. Hannay, P. Caldwell, and C. Bitz, 2016: Global Climate Impacts of Fixing the Southern Ocean Shortwave Radiation Bias in the Community Earth System Model (CESM), Journal of Climate, https://doi.org/10.1175/JCLI-D-15-0358.1

Wall, C.J., and D.L. Hartmann, 2015: On the Influence of Poleward Jet Shift on Shortwave Cloud Feedback in Global Climate Models, Journal of Advances in Modeling Earth Systems, https://doi.org/10.1002/ 2015MS000520

Research projects

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