Recent developments in both the policy arena and the climate impacts r
esearch community point to a growing interest in human adaptation to c
limatic variability and change. The importance of adaptation In the cl
imate change question is affirmed in the Intergovernmental Panel on Cl
imate Change (IPCC) Technical Guidelines for Assessing impacts and Ada
ptations and the IPCC's more recent Second Assessment Report. Yet, the
nature and processes of human adaptation to climate are poorly unders
tood and rarely investigated directly. Most often, human responses of
one form or another are simply assumed in impacts research. Analyses t
hat do address adaptation use a variety of interpretations and perspec
tives resulting in an incomplete, and at inconsistent, understanding o
f adaptation to environmental variations. This paper reviews and synth
esizes perspectives from an eclectic body or scholarship to develop a
framework for characterizing and understanding human adaptation to cli
matic variability and change. The framework recognizes the characteris
tics of climatic events, the ecological properties of systems which me
diate effects, and the distinctions which are possible among different
types of adaptation. A classification scheme is proposed for differen
tiating adaptation strategies.