 |
|
|
|
|
|
|
|
|
|
|
|
| q |
Climate changes over the last 1000 years have been
|
|
|
|
smaller than those over tectonic, orbital, and
glacial-age
|
|
|
millennial time scales, never exceeding 1°C on a global
|
|
|
basis.
|
|
|
| q |
Climate changes over the last several thousand years
have
|
|
|
been highly variable in pattern from region to region.
|
|
|
| q |
Over much of this interval, records of climate are based
|
|
|
on geochemical and geological indicators stored in
|
|
|
annually layered archives: mountain glaciers, tree
rings,
|
|
|
and corals.
|
|
|
| q |
Also available are historical observations recorded by
|
|
|
humans.
|
|
