Examples are presented of inter-hemispheric comparison of instrumental clim
ate and paleoclimate proxy records from the Americas for different temporal
scales. Despite a certain symmetry of seasonal precipitation patterns alon
g the PEP 1 transect, decadal variability of winter precipitation shows dif
ferent characteristics in terms of amplitude and frequency in both the last
100 and last 1000 years. Such differences in variability are also seen in
a comparison of time series of different El Nino/Southern Oscillation proxy
records from North and South America, however, these differences do not ap
pear to affect the spatial correlation with Pacific sea surface temperature
patterns. Local and regional differences in response to climate change are
even more pronounced for records with lower temporal resolution, and inter
-hemispheric synchroneity may or may not be indicative of the same forcing.
This aspect is illustrated in an inter-hemispheric comparison of the last
1000 years of glacier variability, and of the full- and lateglacial lake le
vel history. (C) 1999 Elsevier Science Ltd. All rights reserved.