the approximate percent of nitrogen in the earth atmosphere is 70 %.
the approximate percent of nitrogen in the earth atmosphere is 70 %.
the approximate percent of nitrogen in the earth atmosphere is?
70 %
atmosphere of earth









































the atmosphere of earth is the layer of gases, commonly known as air, that surrounds the planet earth and is retained by earth's gravity. the atmosphere of earth protects life on earth by creating pressure allowing for liquid water to exist on the earth's surface, absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night (the diurnal temperature variation).









































by volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases.
atmosphere of earth
the hydroxyl oh radical is one of the main chemical species controlling the oxidizing capacity of the global earth atmosphere. this oxidizing reactive species has a major impact on the concentrations and distribution of greenhouse gases and pollutants in the earth atmosphere. it is the most widespread oxidizer in the troposphere, the lowest part of the atmosphere. understanding oh variability is important to evaluating human impacts on the atmosphere and climate. the oh species has a lifetime in the earth atmosphere of less than one second. understanding the role of oh in the oxidation process of methane (ch) present in the atmosphere to first carbon monoxide (co) and then carbon dioxide (co) is important for assessing the residence time of this greenhouse gas, the overall carbon budget of the troposphere, and its influence on the process of global warming. the lifetime of oh radicals in the earth atmosphere is very short, therefore oh concentrations in the air are very low and very sensitive techniques are required for its direct detection. global average hydroxyl radical concentrations have been measured indirectly by analyzing methyl chloroform (chccl) present in the air. the results obtained by montzka "et al." (2011) shows that the interannual variability in oh estimated from chccl measurements is small, indicating that global oh is generally well buffered against perturbations. this small variability is consistent with measurements of methane and other trace gases primarily oxidized by oh, as well as global photochemical model calculations.
hydroxyl radical