The Northern Hemisphere has much more land for vegetation to grow on compared to the Southern Hemisphere. Carbon dioxide (CO2) builds up slowly during the northern winter, when trees and plants are dormant. Then in May everything begins to grow, and CO2 is taken out of the atmosphere, so the levels start coming down. In October and November vegetation stops growing, and in its dormant state it stops absorbing CO2, so the carbon in the atmosphere increases. These levels go up and down like this every year.
The readings for 1958, 1959 and 1960 show this:
1960: May: 320.5 ppm: October: 314.5 ppm
1959: May: 320.0 ppm: October: 313.5 ppm
1958: May: 318.0 ppm: October: 313.0 ppm
Ppm means parts per million, so 320 ppm is the same as 0.032 percent (per hundred).
The recent readings for May are:
2011: 394.35 ppm
2010: 393.22 ppm
2009: 390.18 ppm
See the graph at the link below.
Increasing concentration of carbon dioxide in the atmosphere is considered a factor that increase the global warming.
Any increase in atmospheric carbon dioxide contributes to global climate change.
Carbon dioxide is the gas that is primarily responsible for global warming. Carbon monoxide, on the other hand, is not a significant greenhouse gas and does not have as large of an impact on the Earth's climate.
An increase in the atmospheric levels of carbon dioxide is the biggest contributor to global warming.
Carbon dioxide has been charged and convicted of causing global warming.
China has recently overtaken the US in annualcarbon dioxide emissions, but the US still has the highest historical levels. Carbon dioxide is a greenhouse gas responsible for global warming and climate change.
Carbon dioxide.
Carbon dioxide is known as a greenhouse gas which cause global warming.
Increasing concentration of carbon dioxide in the atmosphere is considered a factor that increase the global warming.
Any increase in atmospheric carbon dioxide contributes to global climate change.
Carbon dioxide is the gas that is primarily responsible for global warming. Carbon monoxide, on the other hand, is not a significant greenhouse gas and does not have as large of an impact on the Earth's climate.
An increase in the atmospheric levels of carbon dioxide is the biggest contributor to global warming.
Carbon dioxide (CO) = 1 Carbon dioxide (CO2) = 1. In the atmosphere.
Carbon dioxide can interfere with ozone.. It depletes the ozone by causing global warming.
Carbon dioxide is the most important greenhouse gas and contribute to global warming.
Carbon dioxide causes global warming. It then causes ozone depletion.
Carbon dioxide is the main greenhouse gas. It also causes global warming.