Tree ring sizes don't reflect "warm v cold", rainfall is extremely important - warm-wet years will show greater growth than warm-dry
and cold-wet - cold-wet may fit somewhere into the pattern
but also there are matters like
length of the growing season .... so we cannot make simplistic judgments from dendrochronology. Also worth noting that rings show changes in *weather* rather than *climate* .....
However, there are much better indicators of anthropogenic climate change (glacial CO2 changes, for instance) which suggests that humans have accelerated climate warming
irrespective of natural changes which, as I get tired of repeating,
no one denies!
Pleased to see that you are taking appropriate action whatever the underlying cause. If only other people would take the same precautionary principle -
if you might be contributing to the problem then
stop it unless you can prove that you're not! So many people are taking the attitude that 'well it's not proven' to just do nothing and carry on with their polluting ways ....
Well done
Quote:
Originally Posted by nikki cooper  I think it is essentially a natural occuring process myself. When we look at the rings in old, old trees we can see naturally occuring changes in climate over thousands of years. Colder and hotter climatic evidence is present as the trees grow more during hotter episodes than cold (not to state the obvious) and the rings are bigger during these times. However, i do believe that we have a duty to look after this beautiful Earth. Many species have become extinct through human intervention and turning the earth into a vast rubbish dump is not what i have planned for my descendants to see. Hence i recycle and 'do my bit'. I feel its just negligence otherwise. |