In the Earth's atmosphere, there are specific wavelengths of infrared radiation that are absorbed by greenhouse gases such as water vapor (H2O) and carbon dioxide (CO2). These gases can absorb and re-emit certain wavelengths of infrared radiation, leading to the greenhouse effect and contributing to the Earth's temperature regulation.
Water vapor and carbon dioxide are particularly effective in absorbing certain infrared wavelengths, including those in the 15 micron (μm) range. However, it's important to note that not all infrared radiation in the 15 micron range is absorbed by H2O and CO2 molecules.
The absorption spectrum of these gases is not limited to a single, narrow wavelength but rather encompasses a range of wavelengths. So, while a portion of the 15 micron long-wave surface emissions can indeed be absorbed by H2O and CO2 molecules, not all of them are necessarily absorbed.
Furthermore, other factors can influence the behavior of infrared radiation in the atmosphere, such as the concentration of greenhouse gases, the atmospheric temperature profile, and the presence of other molecules and aerosols. These factors can affect the overall absorption and transmission of radiation in the atmosphere.
In summary, while water vapor and carbon dioxide can absorb certain wavelengths of infrared radiation, it is not accurate to say that all available 15 micron long-wave surface emissions are entirely absorbed by these molecules. The behavior of infrared radiation in the atmosphere is complex and influenced by various factors.