by
UncleCurt
Dec 02, 2009
You cite grape grower records? What about Paleoclimatology is the study of past climate, for times prior to instrumental weather measurements. Paleoclimatologists use information from natural climate "proxies," such as tree rings, ice cores, corals, and ocean and lake sediments, that record variations in past climate. http://www.ncdc.noaa.gov/paleo/why-paleo.html