A data frame with 1001 observations on the following 10 variables.
- nhtemp
Northern hemisphere average temperature (C)
provided by the UK Met Office (known as HadCRUT2)
- wusa
Tree
ring proxy information from the Western USA.
- jasper
Tree
ring proxy information from Canada.
- westgreen
Ice core proxy
information from west Greenland
- chesapeake
Sea shell proxy
information from Chesapeake Bay
- tornetrask
Tree ring proxy
information from Sweden
- urals
Tree ring proxy information
from the Urals
- mongolia
Tree ring proxy information from
Mongolia
- tasman
Tree ring proxy information from Tasmania
- year
Year 1000-2000AD