De Anima astutely points out that FT and HT are at cross purposes with respect to forestry burnoffs and cloud seeding. There is a growing body of evidence that industrial air pollution causes rainfall suppression (see Rosenfeld, Science 297, 2000 and Givati and Rosenfeld, J. Applied Meterology, 43, 2004). Supression of rainfall of between 15% and 25% by pollution has been observed for both California and Israel with a measured reduction of up to 220mm annually. It is possible that forestry burnoffs and associated airborne particulate matter could be causing a similar reduction in rainfall in Tasmania. It would be interesting to see if there was any correlation between hectares burnt and rainfall decline over the Autumn period.
Posted by Dr Andrew Wadsley on 31/03/08 at 12:17 PM
ON this one lets hope the Hydro wins out, it is easier to put up with the rain than the smoke and creosote.
If it rains enough the wood will just have to rot naturally into the ground. Unlike the special species timber on coupe EP074D that was piled up and burnt. On that coupe there was over 900 tonnes per hectare of special species and craft wood burnt. See Timberworkers for Forests Website for the report.
The Hydro used to be the baddies in the old days but just once let them win this battle
Posted by Pete Godfrey on 01/04/08 at 03:42 PM
Doc Andrew,
can’t say where i came across it but i was always under the impression that deforestation always caused a decrease in rainfall, i think we were taught that at school which is a long ,long, time ago for me, something to do with whatever it is they emit into the air causes rain.
Must be something in it ! as wherever there is a shortage of trees , bush ,forest or whatever, there seems also to be very little rain.
d.d.
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