Buen día a todos !
Enclosed find the thermocline depths field. Only a little area SE Iceland (a warm eddy), locates the thermocline to 250-300 m. The rest of the domain shows upper thermoclines in front of the Silbo path. We could adjust the critic thermocline depth (up of the yoyo depth) when silbo flies in operational way out of the in shore iceland waters area.  We would avoid additional upper thermoclines that could affect its speed.

Fig 1. Thermocline depth field. N Atlantic. 24th june 11.

 

However, the most interesting remark is related the SSHa field.

Fig 2. SSHa field. N Atlantic. 24 jun 11.

The eddies are organized/ordered in scale and sign from the centroid to the border of this incredible liquid meccano. It changes the sign of the gears (eddies) alternatively, and increases the size (submeso->mesoscalar) from the centroid to the border again.
Fig 3.- Fractal liquid cold meccano.
Silbo will fly the Western sector of this incredible feature. He could take advantage of the Cold eddy (the Western side) located South him, or, otherword, the Eastern border of the warm eddy SW him.
I expect you enjoy it !!
un abrazo a todos !
Antonio G.Ramos