| 宁夏南部地表辐射和热量平衡的遥感研究 |
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| 引用本文： | 郭建茂,陆维松,闵文彬,刘文泉,王连喜.宁夏南部地表辐射和热量平衡的遥感研究[J].应用气象学报,2007,18(5):702-708. |
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| 作者姓名： | 郭建茂 陆维松 闵文彬 刘文泉 王连喜 |
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| 作者单位： | 1.南京信息工程大学应用气象系, 南京 210044 |
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| 基金项目： | 国家自然科学基金;中国气象局开放实验室基金;科技部科研院所社会公益研究专项基金 |
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| 摘 要： | 为了研究和揭示宁夏南部地气能量传输过程及特点并进一步评估退耕还林还草的生态效应, 利用Landsat-7 ETM+卫星遥感资料所求取的地表特征参数, 将地表分成水体、裸地、半裸地、草地、林地5类地表覆盖类型, 结合常规气象观测资料, 分别计算得出宁夏南部地表辐射和热量平衡各量的区域分布, 并给出各量的分布图和直方图, 分类别讨论了地表辐射和热量平衡各量分布特征, 使得对宁夏南部区域地表辐射和热量平衡区域分布有一个直观、综合的了解和认识。研究表明, 植被分布对地表辐射和热量平衡各量影响很大。
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| 关 键 词： | 地表热量平衡 地表辐射平衡 区域分布 遥感 宁夏南部 |
| 收稿时间： | 2006-04-07 |
| 修稿时间： | 2007-01-15 |
Regional Distribution of Surface Heat and Radiation Balance Components over South Ningxia Using Remote Sensing Technique |
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| Guo Jianmao Lu Weisong Min Wenbin Liu Wenquan Wang Lianxi.Regional Distribution of Surface Heat and Radiation Balance Components over South Ningxia Using Remote Sensing Technique[J].Quarterly Journal of Applied Meteorology,2007,18(5):702-708. |
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| Authors: | Guo Jianmao Lu Weisong Min Wenbin Liu Wenquan Wang Lianxi |
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| Affiliation: | 1.Department of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 2100442.Institute of Plateau Meteorology, CMA, Chengdu 6100713.Chinese Academy of Meteorologial Sciences, Beijing 1000814.Key Laboratory of Meteorological Disaster Preventing and Mitigation of Ningxia Hui Autonomous Region, Yinchuan 750002 |
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| Abstract: | The regional land surface heat and radiation balance components are very important and not easy to deal with.To study the components of surface radiation balance and heat balance over inhomogeneous landscape,the utilization of satellite remote sensing is indispensable.In this study,a parameterization method based on Landsat-7 ETM data and 20 weather stations data is described to obtain the regional distributions of the components of surface radiation balance and surface heat balance over the south Ningxia area.The south Ningxia area is divided into five surface types: water surface,naked surface,half-naked surface area,grass area and forest area.The regional distributions of the components of surface radiation balance and surface heat balance are calculated and discussed according to each type.Further more,each distribution map and straight-bar figure of the components of surface radiation balance and surface heat balance is given.The results indicate that all the regional distributions are characterized by their terrain nature and the regional distributions are obvious.The figures of the mountains and rivers are very clear,it is because there is a great deal of vegetation over the mountains and rivers edge.It is seen that the derived regional distributions of surface radiation balance and surface heat balance components for the whole mesoscale area are in good accordance with the land surface status.The surface absorbed shortwave radiation is high over Liupan Mountain and Guanmen Mountain,and Yueliang Mountain and the rivers edge is high too,the minimum is in the naked area.In clear day,the surface absorbed shortwave radiation is mainly determined by surface reflectivity.The regional distribution of net radiation is similar to the surface absorbed shortwave distribution.The maximum latent heat flux is at Liupan Mountain which is second by Guanmen Mountain,Yueliang Mountain,rivers edge and other irrigated areas,the low latent heat flux areas are over naked areas.The regional distributions of surface sensible heat flux are opposite to latent heat flux.Soil heat flux is a small quantity in the heat balance function. |
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| Keywords: | components of surface radiation balance components of surface heat balance regional distribution remote sensing south Ningxia area |
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