I'm doing an "artist showcase" mixset series for 2015, each month introducing a relatively unknown musicial/project. Not always ambient-oriented, but this month you should definitely check out Halftribe. This guy creates some truly soothing soundscapes, I've been following him for a few years now and I have been consistently impressed by his music. Most of it, you can download for free on his soundcloud profile (look him up), he regularly uploads fresh, unsigned material.
So, without any more pep talk, go on and enjoy 60 minutes of Halftribe, mixed by me:
click here to see it on mixcloud