Sentences with phrase «measured against tree»

exactly... i recall seeing a graph produced from ice core samples in which the CO2 content of thousands of years past was measured against tree ring data... what it showed was CO2 levels rising 300 years after rapid vegetative growth (natural warming) and incidently the PPM of CO2 measured higher than current levels.

Not exact matches

It's possible to compare this new generational chronology directly against the climate record, which researchers can also measure on a finer scale by examining changes to tree rings, lake sediments and other materials.

Tree rings in Cathedral to be dated and measured against English template from Midlands dated from 882 to 1810

The models have used measured data and reconstructed temperatures from proxies (tree rings, ice cores, boreholes, sediments, etc.) and been calibrated against at least the last few thousand years of data, and they all predict that the temperatures will continue to rise.

That Massachusetts law against cutting your neighbor's trees is silent on how to measure the damages should such cutting occur.