| The concentration and distribution of dimethyl sulfide in the marine atmospheric boundary layer near the equator |
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| 作者姓名： | Li Xingsheng Li Zhe F. Parungo C. Nagamoto |
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| 作者单位： | Li Xingsheng; Li Zhe; F. Parungo and C. Nagamoto ( Chinese Academy of Meteorological Science，State Meteorological Administration，Beijing，China)(NOAA/ERL，Air Resources Laboratory，Boulder，CO 80303，U. S. A.) |
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| 摘 要： | Ｔｈｅｃｏｎｃｅｎｔｒａｔｉｏｎａｎｄｄｉｓｔｒｉｂｕｔｉｏｎｏｆｄｉｍｅｔｈｙｌｓｕｌｆｉｄｅｉｎｔｈｅｍａｒｉｎｅａｔｍｏｓｐｈｅｒｉｃｂｏｕｎｄａｒｙｌａｙｅｒｎｅａｒｔｈｅｅｑｕａｔｏｒ￥ＬｉＸｉｎｇｓｈｅｎｇ；ＬｉＺｈｅ；Ｆ．Ｐａｒｕｎｇｏ...
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| 关 键 词： | Dimethyl sulfide marine atmospheric boundary layer equator |
| 收稿时间： | 1994/8/20 0:00:00 |
| 修稿时间： | 1995/5/18 0:00:00 |
The concentration and distribution of dimethyl sulfide in the marine atmospheric boundary layer near the equator |
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| Li Xingsheng,Li Zhe,F. Parungo,C. Nagamoto.The concentration and distribution of dimethyl sulfide in the marine atmospheric boundary layer near the equator[J].Acta Oceanologica Sinica,1995,14(3):355-369. |
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| Authors: | Li Xingsheng Li Zhe F Parungo and C Nagamoto |
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| Institution: | 1.Chinese Academy of Meteorological Science, State Meteorological Administration, Beijing, China2.NOAA/ERL, Air Resources Laboratory, Boulder, CO 80303, U. S. A |
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| Abstract: | A one-dimensional photochemical model with parameterized vertical eddy diffusion is used to simulate the dimethyl sulfide (DMS) in the marine atmospheric boundary layer near the equator. The boundary condition of theDMS flux over sea surface is assigned from gas exchange models that deped on sea surface wind speed and DMS concentration in surface water. Photolysis rates at various altitudes are calculated as a function of Solar zenith angle, andthe radiation calculation includes ozone absorption,surface reflection and molecular scattering.The simulated results of the DMS diurnal cycle are in good agreement with the observations. Sensitivity tests ofthe model indicate that the concentration of the DMS in the marine surface layer appears to be affected by a combination of chemical processes and meteorological conditions. In addition, photochemical processes are rather important.The reaction of the DMS with OH radical, the heterogeneous conversion of SO2 and the deposition of NSS-SO andthe methanesulfonic acid (MSA) are critical factors of controlling the DMS, SO2, NSS-SO and the MSA concentrations and distributions in the atmosphere.The DMS concentration in air is directly proportional to surface windspeed, but it is inversely proportional to boundary layer height in the convective boundary layer. The distributions ofthe DMS concentrations in air are strongly influenced by atmospheric stratification in stable conditions. |
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| Keywords: | Dimethyl sulfide marine atmospheric boundary layer equator |
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