SunnyFl Posted January 23, 2009 Report Share Posted January 23, 2009 Maybe I'm just trying to be optimistic (and in no way trying to start a climate change debate--I really have no idea whether it's happening or not), but who's to say this actually *wasn't* an 80's-style freeze, and maybe due to climate change the temperatures just weren't as low? USDA climate zones are based on average yearly minimums, and in big freeze events that only happen every decade or 2, a place that is legitimately 10a (like St. Pete) could hit 24 or so, and still keep its distinction, because that sort of event is just so rare... I think you've hit the nail on the head. Go back to this past November, when we were getting January-type temps, and I think it was Ray who pointed out that this was the same pattern as in '89, the year of the December killer-freeze. The last two nights were similar to the type of freeze event that was so bad in the 80's - with hard freezes down the peninsula. But this time, St. Pete fared much better. The cause could be climate change... OR it simply could be the Urban Heat Island effect. Remember that St. Pete is far more built up now than it was in the '80s, with more air traffic from the St. Pete/Clw airport and far more overnight traffic than in the 80's. These elements are proven to increase temperatures, even without climate change. So, if you're correct - that this may have been an "80's-style freeze," then our zone really has gone from 9b to 10a, and we're able to plant tropicals that, in the 80's, would have been impossible. Back then, we routinely lost roebs, hibiscuses and bougies.... now we're hoping we don't lose veitchias, adonidias, and bottles. Okay - I just went outside to check, didn't really seem that cold, in spite of ice on the windshield. The bottle, spindle & lutescenses seem okay (hope so), but we'll know for sure by tomorrow. Glauca & morrissii are fine, but that's to be expected. St. Pete Zone - a wacked-out place between 9b & 10 Elevation = 44' - not that it does any good Link to comment Share on other sites More sharing options...
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