Marooned in Real Time by Vernor Vinge has a fair bit about long term climate change in it. If you haven't read it I would recommend it, Vinge is very inventive.
http://en.wikipedia.org/wiki/Marooned_in_RealtimeIn the story, a device exists which can create a "bobble", a spherical stasis field in which time stands still, allowing one-way time travel into the future. These frictionless, perfectly reflective spheres are also used as weapons, as shields against other weapons, for storage, for space travel (combined with nuclear pulse propulsion), and other purposes.
People whose bobbles open up after a certain date in the 23rd century find the Earth completely devoid of human life. All living humans have disappeared, with only ambiguous archaeological clues for the reasons, and only those who were inside bobbles during the event survive into the future. The "low-techs" — those who were bobbled soon after the original invention of bobbles — have roughly late-20th-century technology. The "high-techs" — those who were bobbled later in time (in the period of accelerating technological progress leading up to the singularity) — have vastly superior technology, including cybernetic enhancements, faster and thought-controlled bobblers, personal automaton extensions of self, space ships, medical technology to allow immortality, and individual arsenals comparable to entire countries of the 20th century. Indeed, those who were bobbled at slightly different times leading up to the singularity, have vastly different technology levels.
The protagonist is Wil Brierson, a detective who also was the protagonist of the preceding novella "The Ungoverned". Some time after the events in "The Ungoverned", Brierson was forcibly bobbled 10,000 years into the future to prevent his testimony in a case, effectively murdering him. As a punishment, the law enforcement of his time period bobbled criminals for a slightly longer amount of time than their victims, with a message explaining the crime and allowing future law enforcement to provide more specific punishment (or revenge), after the true fate of the victim can be determined. However, in this unpopulated world, every human is valuable, and the high-techs give the criminals new false identities to protect them and welcome them into their small society.
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