| NUMERICAL SIMULATION OF FRONTOGENESIS FORCED BY DUST RADIATIVE HEATING |
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| 作者姓名： | (申绍华 (陈受钧 |
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| 作者单位： | National Research Center for Marine Environment Forecast Beijing 100081，Department of Geophysics，Peking University，Beijing 100871 |
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| 基金项目： | Sponsored by Doctoral Programme Foundation of Higher Education Institution,project No.9200125. |
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| 摘 要： | In this paper,the frontogenesis forced by dust radiative heating and the radiative effects of an isolated duststorrn ona frontal circulation system are examined by means of two-and three-dimensional numerical models.Results indicatethat as a duststorm breaks out, frontogenesis is caused in by dust radiative heating in the lower atmosphere.A markedisentropic potential temperature layer is formed in the middle troposphere.The low-level convergence occurs along thedirection of the front movement.Atnight,dust radiative cooling results in frontolysis in the lower atmosphere.An obvious vertical circulation is forced by radiative heating of an isolated duststorm along the direction of the pre-vailing wind.It is stronger at day,weaker and reverse at night.The response of the horizontal wind field to dust radiativeforcing is different at different levels.
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NUMERICAL SIMULATION OF FRONTOGENESIS FORCED BY DUST RADIATIVE HEATING |
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| Shen ShaohuaNational Research Center for Marine Environment Forecast,Beijing and Chen Shoujun.NUMERICAL SIMULATION OF FRONTOGENESIS FORCED BY DUST RADIATIVE HEATING[J].Acta Meteorologica Sinica,1994(2). |
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| Authors: | Shen ShaohuaNational Research Center for Marine Environment Forecast Beijing and Chen Shoujun |
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| Affiliation: | Shen ShaohuaNational Research Center for Marine Environment Forecast,Beijing 100081 and Chen ShoujunDepartment of Geophysics,Peking University,Beijing 100871 |
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| Abstract: | In this paper,the frontogenesis forced by dust radiative heating and the radiative effects of an isolated duststorrn on a frontal circulation system are examined by means of two-and three-dimensional numerical models.Results indicate that as a duststorm breaks out, frontogenesis is caused in by dust radiative heating in the lower atmosphere.A marked isentropic potential temperature layer is formed in the middle troposphere.The low-level convergence occurs along the direction of the front movement.Atnight,dust radiative cooling results in frontolysis in the lower atmosphere. An obvious vertical circulation is forced by radiative heating of an isolated duststorm along the direction of the pre- vailing wind.It is stronger at day,weaker and reverse at night.The response of the horizontal wind field to dust radiative forcing is different at different levels. |
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| Keywords: | duststorm radiation frontogenesis numerical simulation |
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