Articles | Volume 16, issue 3
https://doi.org/10.5194/acp-16-1545-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-16-1545-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
10 Feb 2016
Research article |
| 10 Feb 2016
Observations of surface momentum exchange over the marginal ice zone and recommendations for its parametrisation
A. D. Elvidge
CORRESPONDING AUTHOR
School of Environmental Sciences, University of East Anglia, Norwich,
UK
present address: Atmospheric Processes and Parametrisations, Met Office, Fitzroy Road,
Exeter, UK
I. A. Renfrew
School of Environmental Sciences, University of East Anglia, Norwich,
UK
A. I. Weiss
British Antarctic Survey, Cambridge, UK
I. M. Brooks
School of Earth and Environment, University of Leeds, Leeds, UK
T. A. Lachlan-Cope
British Antarctic Survey, Cambridge, UK
J. C. King
British Antarctic Survey, Cambridge, UK
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Neil P. Hindley, Corwin J. Wright, Alan M. Gadian, Lars Hoffmann, John K. Hughes, David R. Jackson, John C. King, Nicholas J. Mitchell, Tracy Moffat-Griffin, Andrew C. Moss, Simon B. Vosper, and Andrew N. Ross
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Summer clouds have a significant impact on the radiation budget of the Antarctic surface and thus on ice-shelf melting. However, these are poorly represented in climate models due to errors in their microphysical structure, including the number of ice crystals that they contain. We show that breakup from ice particle collisions can substantially magnify the ice crystal number concentration with significant implications for surface radiation. This process is currently missing in climate models.
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Short summary
Rare aircraft observations of surface momentum flux over the Arctic marginal ice zone provide the best means yet to constrain model representation of MIZ surface roughness. The sensitivity of surface roughness to ice concentration over the Arctic MIZ is presented; these results do not support the values used in many models. However, a leading parameterization scheme (that of Lüpkes et al., 2012) is found to provide a good representation of form drag, after some parameter alterations.
Rare aircraft observations of surface momentum flux over the Arctic marginal ice zone provide...
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