It looks like Alonso's possibility of moving to Mercedes has hit the rocks as Rosberg it is believed has signed a new deal.
http://www.bbc.com/sport/0/formula1/
Meanwhile Ferrari are saying that Alonso has long term commitments to them.
http://www.grandprix.com/ns/ns28094.html
I suspect that Alonso wants to get into a winning car and is getting frustrated with his current situation.