The phrase "atmospheric concentration" is correct and usable in written English.
It can be used in contexts related to environmental science, climate change, or atmospheric studies to refer to the amount of a substance present in the atmosphere.
Example: "The atmospheric concentration of carbon dioxide has been steadily increasing over the past century."
Alternatives: "airborne concentration" or "ambient concentration".
The first kayak protests in Portland began as part of a joint action around the world--to signify the optimal atmospheric concentration of CO2 in the Earth's atmosphere, 350 parts per million.
Consequently, since the beginning of the Industrial Revolution, the atmospheric concentration of carbon dioxide has risen by 40%.
The initial proportion of 14C in organic matter depends upon the atmospheric concentration of 14C when the matter was living.
Burning oil and coal, by contrast, converts carbon that was trapped underground for millions of years into carbon dioxide, raising the atmospheric concentration.
The study simulated the effects of a steady rise in carbon dioxide levels until the equivalent atmospheric concentration topped 1,000ppm (parts per million).
IBM recognizes climate change is a serious concern that warrants meaningful action on a global basis to stabilize the atmospheric concentration of greenhouse gases.
The largest contribution to total radiative forcing is caused by the increase in the atmospheric concentration of CO since 1750 Human influence on the climate system is clear.
By some calculations, the tar sands contain the equivalent of about 200 parts per million CO2 – or roughly half the current atmospheric concentration.
Deforestation is one of the biggest sources of carbon dioxide emissions, which this week were found to have reached the highest atmospheric concentration in recorded human history.
Between 1950 and the first six months of 2014, the atmospheric concentration of the main greenhouse gas, carbon dioxide, increased by 100 parts per million".
This past Thursday, the daily average atmospheric concentration of carbon dioxide, as measured by the Mauna Loa observatory in Hawaii, passed four hundred parts per million.
