I am looking for a word to describe my feelings for a special place and time that cannot last. Specifically I seek a word to describe what I call a nostalgia for the future - the sentiment I would have if I live to see the loss of that which I find very special. In my case it is the beauty of the place and time in which I live: mountains, ocean, forests, birds and other wildlife, but I suspect many of us have this future nostalgic sense. Is there a word for this? If not, perhaps one can be invented.