what Tim says, you won't be seeing CO2 increases in tree rings unless you're in dendro-chronology and have decades of growth records from a range of habitats to compare with .... milder wetter years make for wider rings, as well as selective logging opening up an area so the trees left get more UV

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics