The radiation from sunlight is the primary and only source of energy of the planet Earth. In the evolution of Earth, a portion of energy have been stored as fossil fuels, and it can be said that a large amount of carbon has been sealed in storage. The atmosphere has also played an important role in the evolution of life on Earth. The contents of the atmospheric layers have also been changing with the progression of Earth's history. Recently, with industrialization and the mining and use of fossil fuels, the atmospheric layers have reacted with large transformations. The effects of these transformations are diverse, with the most apparent being an increase of global temperature, the changing of climate types, and the abundance of uncanny climate phenomenons.
The gases in the atmosphere which can absorb long wave radiation are called greenhouse gases, and when they increase in density they lower the earth's emissivity to outer space, reducing the amount of heat that is dispersed to space. This accumulated energy causes increased temperatures in the lower layers of the atmosphere and the surface of the planet. Common greenhouse gases include: CO2, CH4, N2O, hydro fluorocarbons (HFCs), per fluorocarbons (PFCs), sulfur hexafluoride (SF6), steam (H2O), ozone (O3), and others.
Since the 1750s, the density of carbon dioxide, methane, and nitrogen oxides in the atmosphere have risen due to human activity. By analyzing the figures retrieved from ice core samples dating back to a few thousand years, it is highly evident that the current density levels higher than they were prior to industrialization. Of these, carbon dioxide levels from risen from 280 ppm before industrialization to 379 ppm in 2005, methane levels have risen from 715 ppb to 1774 ppb in 2005, while nitrous oxide density has risen from 270 ppb to 319 ppb in 2005.
The global increase of carbon dioxide is mainly due to the burning of fossil fuels and changes in the way land is utilized. Total combustion of fossil fuels (hydrocarbons) produce carbon dioxide (CH4) and other gases which cause the greenhouse effect and trap radiation in the atmosphere, creating the global trend of rising temperatures. Gases that produce the greenhouse effect are diverse, including CH4, N2O and man-made gases such as hydro fluorocarbons (HFCs), per fluorocarbons (PFCs), sulfur hexafluoride (SF6), steam (H2O), ozone (O3), and others. The six gases mentioned above (CO2, CH4, N2O, HFCs, PFCs, SF6) are targeted gases for regulation in the Kyoto Protocol. These are also the gases that are inventoried, confirmed for each industry, and the limiting factors in the purchasing quota of carbon.
The detection of greenhouse gas density in the environment include their density and trend in order to explore the changes in the global atmosphere and the environmental changes they signify. Also, the emission of greenhouse gases must also be checked to estimate emission and absorption levels by monitoring the emission sources and emission outlets of greenhouse gases.
Currently, this administration only monitors and detects the density of carbon dioxide in the atmosphere. Carbon dioxide monitoring instruments are currently installed in average environmental atmosphere monitoring stations such as Shanhua station, Henchun station, Yang Ming station, Yilan station, Songshan station, Dali station, and Lulin Mountain's atmospheric background station, who continuously monitor carbon dioxide levels in the atmosphere for 24 hours.