The phrase "atmosphere ratio" is correct and usable in written English.
It can be used in contexts related to environmental science, physics, or discussions about atmospheric conditions and their measurements.
Example: "The atmosphere ratio of carbon dioxide to oxygen is crucial for understanding climate change."
Alternatives: "air composition ratio" or "gas mixture ratio".
For seawater in equilibrium with the atmosphere, the ratio of oxygen and argon concentrations is approximately 20 45.
As photosynthesis in the Cyanobacteria of Precambrian times (before 542 million years ago) oxygenated the atmosphere, the ratio of carbon dioxide to oxygen fell drastically, and Rubisco began to function more and more as an oxygenase.
Finally, two LaFeO3 − xNx multilayers have been synthesized with two initial atmospheres (Ar/O2 ratio are 21/7 and 21/1 sccm) where nitrogen is introduced step by step.
In addition, in the upper atmosphere of Venus D/H ratio is 1.5 higher than in the bulk atmosphere.
The effects of isooctane injection timing, active-thermal atmosphere intensity, overall equivalence ratio, and premixed ratio on combustion characteristics and emissions are investigated.
LSGM targets with La0.76Sr0.24Ga0.63Mg0.37O3−δ composition and a deposition atmosphere with Ar/O2 ratios ranging from 10/0 to 5/5 were used throughout the study.
Ti Zr N coatings were formed by the method of vacuum arc deposition using combined Ti and Zr plasma flows in a N2 atmosphere at different ratios of arc currents of Ti and Zr cathodes.
Deposition was carried out in a mixed argon/nitrogen atmosphere with Ar N2 ratios of 4, 1.5 and 1, and a total gas flow of 25 sccm for all cases.
Tv is approximately related to T as follows: T_{text{v}} approx left( {1 + 0.61frac{{m_{text{e}} }}{{m_{text{d}} }}} right), (5 where me and md are the weights of the water vapor and the dry atmosphere, respectively, and this ratio is called the water vapor mixing ratio.
The vapour pressure would be 17 mb (0.02 standard atmosphere) and the mixing ratio about 11 parts per thousand (11 grams of water per kilogram of air by weight).
