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Sea ice, high-latitude convection, and equable climates D. S. Abbot1

Summary: Sea ice, high-latitude convection, and equable climates
D. S. Abbot1
and Eli Tziperman1,2
Received 8 October 2007; accepted 27 November 2007; published 9 February 2008.
[1] It is argued that deep atmospheric convection might
occur during winter in ice-free high-latitude oceans, and that
the surface radiative warming effects of the clouds and
water vapor associated with this winter convection could
keep high-latitude oceans ice-free through polar night. In
such an ice-free high-latitude ocean the annual-mean SST
would be much higher and the seasonal cycle would be
dramatically reduced - making potential implications for
equable climates manifest. The constraints that atmospheric
heat transport, ocean heat transport, and CO2 concentration
place on this mechanism are established. These ideas are
investigated using the NCAR column model, which has
state-of-the-art atmospheric physics parameterizations, high
vertical resolution, a full seasonal cycle, a thermodynamic
sea ice model, and a mixed layer ocean. Citation: Abbot,
D. S., and E. Tziperman (2008), Sea ice, high-latitude convection,


Source: Abbot, Dorian Schuyler - Department of Geophysical Sciences, University of Chicago
Tziperman, Eli - Departments of Earth and Planetary Sciences & School of Engineering and Applied Sciences, Harvard University


Collections: Environmental Sciences and Ecology; Geosciences