| MODIS反照率产品在模拟北京气温中的应用 |
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| 引用本文： | 李雨鸿,申双和,赵小艳.MODIS反照率产品在模拟北京气温中的应用[J].气象科学,2012,32(6):622-628. |
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| 作者姓名： | 李雨鸿 申双和 赵小艳 |
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| 作者单位： | 南京信息工程大学应用气象学院,南京,210044 |
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| 基金项目： | 2007年城市气象科学研究基金(UMRF 200703);江苏省自然科学基金资助项目(BK2006227) |
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| 摘 要： | 地表反照率是制约地表能量收支平衡的基本因子,其变化会影响气温和降水等气象要素,进而影响区域乃至全球的气候。文中使用WRF模式,设计两组反照率敏感试验,探讨地表反照率参数对近地面2处气温模拟精度的影响。结果表明:(1)当北京地区地表反照率增大(减小)0.05时,气温相应降低(升高)0.1～0.5 K,气温变化从城区到郊区有一个明显的降幅,感热通量和潜热通量也相应减小(增大),且变幅主要为0～13 W/m2;(2)将控制试验和MODIS反照率敏感试验模拟结果与实况对比分析发现,两种试验的模拟结果偏低,但应用卫星反照率产品后,气温升高约0.2～0.7 K,更接近实际,即应用MODIS反照率产品替换WRF模式中原有反照率能进一步提高气温的模拟精度。
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| 关 键 词： | MODIS反照率产品 气温 地表反照率 WRF模式 |
| 收稿时间： | 2011/4/27 0:00:00 |
| 修稿时间： | 2011/7/25 0:00:00 |
Application of MODIS albedo data in the simulation of air temperature over Beijing |
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| LI Yuhong,SHEN Shuanghe and ZHAO Xiaoyan.Application of MODIS albedo data in the simulation of air temperature over Beijing[J].Scientia Meteorologica Sinica,2012,32(6):622-628. |
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| Authors: | LI Yuhong SHEN Shuanghe and ZHAO Xiaoyan |
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| Institution: | School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044,China;School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044,China;School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044,China |
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| Abstract: | The variation of land surface albedo (LSA), as an important parameter controlling surface energy balance, has great impact on air temperature and precipitation and further on regional and global climate. In order to investigate influence of LSA on accuracy of air temperature simulation, three numerical experiment schemes: control experiment, sensitive experiment and sensitive experiment of MODIS product (ME), were designed in this paper. Results show that: (1) if LSA is increased (decreased) by 0.05, air temperature change amplitude decreases from urban to rural, the air temperature will be decreased (increased) by 0.1-0.5 K, and sensible and latent heat fluxes will be decreased (increased) by 0-13 W/m2; (2) simulated temperature is lower than observed, but applying MODIS LSA product for ME can increase temperature by 0.2-0.7 K, so it is a reasonable way to improve the accuracy of air temperature simulation. |
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| Keywords: | MODIS albedo product Air temperature Land surface albedo WRF model |
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