Publication Abstracts

Roach et al. 2018

Roach, L.A., M.M. Smith, and S.M. Dean, 2018: Quantifying growth of pancake sea ice floes using images from drifting buoys. J. Geophys. Res. Oceans, 123, no. 4, 2851-2866, doi:10.1002/2017JC013693.

New sea ice in the polar regions often begins as small pancake floes in autumn and winter that grow laterally and weld together into larger floes. However, conditions in polar oceans during freezeup are harsh, rendering in situ observations of small-scale sea ice growth processes difficult and infrequent. Here we apply image processing techniques to images obtained by drifting wave buoys (SWIFTs) deployed in the autumn Arctic Ocean to quantify these processes in situ for the first time. Small pancake ice floes were observed to form and grow gradually in freezing, low-wave conditions. We find that pancake floe diameters are limited by the wave field, such that floe diameter is proportional to wavelength and amplitude over time. Floe welding correlates well with sea ice concentration, and the observations can be used to estimate a key model parameter for floe size evolution. There is some agreement between observed lateral growth rates and those predicted using a theoretical model based on heat flux balance, but the model lateral growth rates are too conservative in these conditions. These results will be used to inform description of lateral floe growth and floe welding in new models that evolve sea ice floe size distribution.

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BibTeX Citation

  author={Roach, L. A. and Smith, M. M. and Dean, S. M.},
  title={Quantifying growth of pancake sea ice floes using images from drifting buoys},
  journal={Journal of Geophysical Research: Oceans},

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RIS Citation

ID  - ro01810z
AU  - Roach, L. A.
AU  - Smith, M. M.
AU  - Dean, S. M.
PY  - 2018
TI  - Quantifying growth of pancake sea ice floes using images from drifting buoys
JA  - J. Geophys. Res. Oceans
JO  - Journal of Geophysical Research: Oceans
VL  - 123
IS  - 4
SP  - 2851
EP  - 2866
DO  - 10.1002/2017JC013693
ER  -

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