Absorption coefficient of water vapor across atmospheric troposphere layer
Absorption coefficient of water vapor proposed to be responsible for an increase in temperature in the troposphere layer with altitude less than 10 km is systematically presented in this work. Since global warming plays an important role in affecting the human life, a confirmative and detailed study...
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| Format: | Article |
| Language: | English |
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Elsevier
2019-01-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844018327415 |
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| author | Peng-Sheng Wei Hsuan-Han Chiu Yin-Chih Hsieh Da-Lun Yen Chieh Lee Yi-Cheng Tsai Te-Chuan Ting |
| author_facet | Peng-Sheng Wei Hsuan-Han Chiu Yin-Chih Hsieh Da-Lun Yen Chieh Lee Yi-Cheng Tsai Te-Chuan Ting |
| author_sort | Peng-Sheng Wei |
| collection | DOAJ |
| description | Absorption coefficient of water vapor proposed to be responsible for an increase in temperature in the troposphere layer with altitude less than 10 km is systematically presented in this work. Since global warming plays an important role in affecting the human life, a confirmative and detailed study of global warming is essentially need. Solar irradiation within short wavelength range can be extinguished from absorption and scattering by the atmosphere, and absorbed and reflected by the Earth's surface. Radiative within high wavelength range from the Earth's surface can be absorbed by atmospheric water vapor, carbon dioxide and other gases. The difference in solar irradiation and energy escaped to the space from the atmosphere results in the atmosphere acting as the glass of a greenhouse and increase atmospheric temperature. Extending the previous work [1] for predicting absorption coefficient of carbon dioxide through the troposphere, this work further determines absorption coefficients of water vapor in different wavelength bands centered at 71, 6.3, 2.7, 1.87 and 1.38 μm across the temperature, pressure and concentration-dependent troposphere layer. Solving one-dimensional unsteady heat conduction-radiation equation with the COMSOL computer code, the predicted temperature together with water vapor density for different optical path lengths can be used to interpret in details absorption coefficient or the ratio between band intensity and effective band width by using the exponential wide band model. The results show that absorption coefficients are strongly affected by water vapor concentration. For example, absorption coefficients in the band centered at 71 μm increases from 0.3 to 1.2 m−1 at the tropopause and 0.6 to 3.1 m−1 at the Earth's surface as mole fraction of water vapor increases from 0.005 to 0.02. The predicted absorption coefficients agree with experimental and theoretical results in the literature. A more detailed and realistic temperature profile through the troposphere with optical path length of 104 m is presented. |
| first_indexed | 2024-04-12T04:16:02Z |
| format | Article |
| id | doaj.art-b84b9ee1f59745aab175477b53fa95c3 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-12T04:16:02Z |
| publishDate | 2019-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-b84b9ee1f59745aab175477b53fa95c32022-12-22T03:48:24ZengElsevierHeliyon2405-84402019-01-0151e01145Absorption coefficient of water vapor across atmospheric troposphere layerPeng-Sheng Wei0Hsuan-Han Chiu1Yin-Chih Hsieh2Da-Lun Yen3Chieh Lee4Yi-Cheng Tsai5Te-Chuan Ting6Corresponding author.; Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan, ROCDepartment of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan, ROCDepartment of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan, ROCDepartment of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan, ROCDepartment of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan, ROCDepartment of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan, ROCDepartment of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan, ROCAbsorption coefficient of water vapor proposed to be responsible for an increase in temperature in the troposphere layer with altitude less than 10 km is systematically presented in this work. Since global warming plays an important role in affecting the human life, a confirmative and detailed study of global warming is essentially need. Solar irradiation within short wavelength range can be extinguished from absorption and scattering by the atmosphere, and absorbed and reflected by the Earth's surface. Radiative within high wavelength range from the Earth's surface can be absorbed by atmospheric water vapor, carbon dioxide and other gases. The difference in solar irradiation and energy escaped to the space from the atmosphere results in the atmosphere acting as the glass of a greenhouse and increase atmospheric temperature. Extending the previous work [1] for predicting absorption coefficient of carbon dioxide through the troposphere, this work further determines absorption coefficients of water vapor in different wavelength bands centered at 71, 6.3, 2.7, 1.87 and 1.38 μm across the temperature, pressure and concentration-dependent troposphere layer. Solving one-dimensional unsteady heat conduction-radiation equation with the COMSOL computer code, the predicted temperature together with water vapor density for different optical path lengths can be used to interpret in details absorption coefficient or the ratio between band intensity and effective band width by using the exponential wide band model. The results show that absorption coefficients are strongly affected by water vapor concentration. For example, absorption coefficients in the band centered at 71 μm increases from 0.3 to 1.2 m−1 at the tropopause and 0.6 to 3.1 m−1 at the Earth's surface as mole fraction of water vapor increases from 0.005 to 0.02. The predicted absorption coefficients agree with experimental and theoretical results in the literature. A more detailed and realistic temperature profile through the troposphere with optical path length of 104 m is presented.http://www.sciencedirect.com/science/article/pii/S2405844018327415Atmospheric scienceGeophysicsGeoscience |
| spellingShingle | Peng-Sheng Wei Hsuan-Han Chiu Yin-Chih Hsieh Da-Lun Yen Chieh Lee Yi-Cheng Tsai Te-Chuan Ting Absorption coefficient of water vapor across atmospheric troposphere layer Heliyon Atmospheric science Geophysics Geoscience |
| title | Absorption coefficient of water vapor across atmospheric troposphere layer |
| title_full | Absorption coefficient of water vapor across atmospheric troposphere layer |
| title_fullStr | Absorption coefficient of water vapor across atmospheric troposphere layer |
| title_full_unstemmed | Absorption coefficient of water vapor across atmospheric troposphere layer |
| title_short | Absorption coefficient of water vapor across atmospheric troposphere layer |
| title_sort | absorption coefficient of water vapor across atmospheric troposphere layer |
| topic | Atmospheric science Geophysics Geoscience |
| url | http://www.sciencedirect.com/science/article/pii/S2405844018327415 |
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