Fossil & Surface Pollen Data
The NOAA Paleoclimatology Program distributes the product of various collaborative efforts to collect and organize pollen records from around the globe. These data include the pollen counts and related information, as well as several different derived data sets. Data archived here were last updated in February 2005. Data contributed since March 2005 are available from the Neotoma Paleoecology Database.
Pollen-climate relationships for Ambrosia (Ragweed). [ Source: http://www.ncdc.noaa.gov/paleo/pollen/atlas/atlas.html ] Many other pollen types are available.