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| 土壤湿度估计的理想同化试验研究 | |
| 引用本文： | 唐亚平,张凯,李忠娴,万志强,李岚,张伟. 土壤湿度估计的理想同化试验研究[J]. 安徽农业科学, 2011, 39(2): 1089-1092,1212 |
| 作者姓名： | 唐亚平 张凯 李忠娴 万志强 李岚 张伟 |
| 作者单位： | 唐亚平,李岚(辽宁省气象科技服务中心,辽宁沈阳,110016;南京大学大气科学学院,江苏南京,210039);张凯,万志强,张伟(辽宁省气象科技服务中心,辽宁沈阳,110016);李忠娴(辽宁省防雷技术服务中心,辽宁沈阳,110016) |
| 摘 要： | 通过使用集合Kalman滤波,建立基于不同离散化方法的同化土壤湿度的理想试验。通过设置不同的初始状态,以集合预报的形式建立了openloop和模拟的理想＂真值＂,并将来自不同离散化方法得到的理想＂真值＂集合生成多模型集合预报的理想＂真值＂。分别使用单个的离散化方法同化来自各自理想＂真值＂和多模型集合预报的理想＂真值＂,来检验通过同化表层土壤湿度后对整个湿度廓线的改进能力。结果表明,由于不同的离散化方法建立的土壤层之间的相关性不同,不同的离散化方法通过同化表层土壤湿度后土壤湿度廓线均有改进,但是改进的效率不同;当使用多模型的集合预报时,能够更有效地吸收观测,比任何单个模型的同化效果都要好。 |
| 关 键 词： | 土壤湿度 集合Kalman滤波 数值离散化 |
Study of Soil Moisture Estimation by Ideal Assimilation Experiments |
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| Affiliation: | TANG Ya-ping et al (Liaoning Meteorological Services Center of Science and Technology,Shenyang,Liaoning 110016) |
| Abstract: | Soil moisture profiles were estimated by assimilating surface soil moisture with different schemes with EnSRF.The ideal "true" soil moisture profile were produced with different initial condition,and "multi-true" were also produced by using multi-schemes.The soil moisture estimation was evaluated by assimilating surface soil moisture profile of ideal "true" and "multi-true" with single schemes and multi-schemes.The results showed that because the correlations set up with different schemes were different,the soil moisture profile were different with different schemes after assimilating their ideal "true" and "multi-true",and the soil moisture were all greatly improved by assimilating surface soil moisture of "true".It also showed that the soil moisture profiles were more reliable with multi-schemes than that with single schemes. |
| Keywords: | Soil moisture EnKF Numerical discretization schemes |
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