Actually MAN existed prior to and during the last glacial period.
There are very basic reasons for climate study, farmers and agriculturist use them to determine the zones and variants within the precipitation rates.
Engineers also use them for construction and other projects.
Though the change is slow... longer term planning has a need for study.
Originally, a lot of the global data was collected during WWII for increased accuracy in longer term weather prediction. But satellites now collect much of the data, as ground stations have been show to attributing local factors.
For us locally, it is more accuracy than the older Farmer's Almanacs... which I think currently employ some of that data in their forecasting.
Should summers become wetter and cooler... it will change how some local businesses will operate over the next several decades should they survive.
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