:
For 160,000 years the ratio of CO2 in our atmosphere had remained at a range between 170ppms and 280ppms. Only recently we have seen ppms rise above 280. Has an increase of 0.7 degrees since pre industrial times caused the level of ppms or are we yet to see in the near future where this ppm rise is taking us. Its not too difficult to find out.
(about 1 year ago)
youareanalarmist:
Some of you are ill informed alarmist. Vostek ice core samples show the Earth has cycled Temperature and CO2 over the last 420,000 years. Temperature deviation has ranged from +4 deg C to -9 deg C. The data shows the natural CO2 consentration is about 300 ppm. Compared to former geologic periods, concentrations of CO2 in our atmosphere are still very small and may not have a statistically measurable effect on global temperatures. Furthermore, the data suggests we are very due an iceage. If you don't take my word for it (you shouldn't take anyone's) look this up:
Sources : J.R. Petit, J. Jouzel et al. Climate and atmospheric history of the past 420 000 years from the Vostok ice core in Antarctica, Nature 399 (3rd June) pp 429-436, 1999.
Published in : Vital climate graphics, the impacts of climate change, UNEP and Grid Arendal, 2000.
(4 months ago)
World Total CO2
Emission vs. Yearl..