As everyone else has said, this is really excellent work. And very appropriate indeed for the Luminous Landscape Forum. I am not quite sure why you are bothering to show them to us, get yourself a website and a gallery and start selling prints!
However, there is a little something to criticise in this last landscape. The top of the frame is somewhat weak, as there is very little sky and it is too light to define the top edge of the print properly. Hence this edge of the picture looks unfinished. You could get around it to some extent by using a darker matt than usual when it was framed, or by using a thin box rule set out by 3mm from the edge, as I sometimes do where the sky is just too light.
Very good pictures!