Airborne surveys of the atmospheric boundary layer above the marginal ice zone on the Newfoundland shelf |
| |
| Authors: | Peter C Smith J Ian MacPherson |
| |
| Institution: | 1. Physical and Chemical Sciences, Department of Fisheries and Oceans , Bedford Institute of Oceanography , Dartmouth, N.S., Canada;2. Institute for Aerospace Research , National Research Council , Ottawa, Ontario, Canada |
| |
| Abstract: | Abstract Airborne measurements in the atmospheric boundary layer (ABL) above the marginal ice zone (MIZ) on the Newfoundland Shelf reveal strong lateral variations in mean wind, temperature and the vertical fluxes of heat and momentum under conditions of cold, off‐ice wind. Flux measurements in (and near) the surface layer indicate that the neutral 10‐m drag coefficient depends on ice concentration, ranging from 2 × 10‐3 at 10% coverage to 5 × 10‐3 at 90%. Furthermore, cross‐ice‐edge transects consistently show increasing wind speed, temperature and heat flux in the off‐ice direction, but the momentum flux may either increase or decrease, depending on the relative importance of surface buoyancy flux and roughness. For the conditions encountered in this experiment, it appears surface wave maturity does not have a significant influence on the drag coefficient in fetch‐limited regimes near the ice edge. |
| |
| Keywords: | |
|
|
