Publications:

• Sirevaag, A. (2009), Turbulent exchange coefficients for the ice/ocean interface in case of rapid melting, Geophys. Res. Lett., 36, L04606, doi:10.1029/2008GL036587.
  
  In the marginal ice zones, drifting sea ice encounters large ocean heat fluxes and melting rates. However, as found from modelling studies and observations of ice melting, double diffusive effects at the ice/ocean interface limit the melting rates. In this paper, direct measurements of turbulent heat and salt fluxes from the marginal ice zone during rapid melting are presented. The strength of double diffusion is found to be significant and close to the range suggested from other studies. Calculated melting rates when double diffusive effects are present are compared to melting rates calculated from a traditional bulk parameterization of ocean heat flux for a range of temperatures and friction velocities often encountered within the marginal ice zones. This comparison shows that by ignoring double diffusive effects, melting rates are overestimated by several cm per day, which may have a significant impact on a predicted future ice cover.
  
  
• Fer, I., M.G. McPhee, and A. Sirevaag (2004). Conditional statistics of the Reynolds stress in the under-ice boundary layer. Geophys. Res. Lett., 31, L15311, doi: 10.1029/ 2004GL020475.
  
  Velocity fluctuations at 1 m and 5 m below pack-ice drifting at an average speed of 15 cm/s are analyzed to describe the conditional statistics of Reynolds stress in the under-ice boundary layer, under melting conditions. The fractional contributions to the Reynolds stress show that ejection and sweep events dominate over interaction events. The sweeps are found to be more intense close to the boundary where the third and higher order moments are most pronounced. Third order cumulant expansions are found to describe the conditional Reynolds stress statistics reasonably well. Existing models for the turbulent kinetic energy transport term using cumulant expansion methods capture the effect of observed increase in the friction velocity with depth.
  
  

Other:

• Sirevaag, A (2009). Small-scale dynamics of the under-ice boundary layer. PhD thesis in physical oceanography, University of Bergen
• Sirevaag, A (2003). Turbulence and Heat Exchange under Ice. Cand. Scient. thesis in physical oceanography, University of Bergen, Bergen