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The impact of climate change as a driver of human migration is expected by many to dwarf all others. Still, certain frequently repeated forecasts of the number of people who stand to be displaced by climate change are not informed by a complete understanding of migration dynamics. Displacement is almost always the result of a complex mix of factors: a combination of exposure to natural hazards, poverty-related vulnerability, and resilience (through adaptation) determine which regions and societies are most like to suffer negative effects of climate change.
Beyond these "push" factors, family and community networks, historical ties, proximity, and ease of access all help determine where people go if they move. The most significant mechanisms of displacement are sea-level rise, higher temperatures, disruption of water cycles, and increasing severity of storms.
http://www.migrationpolicy.org/research/climate-ch...
