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Yang Yuanhui, Shi Chunxiang. 2015: The Impact of Soil Moisture Initialization on the Direct Assimilation of Satellite Radiance Data. Chinese Journal of Atmospheric Sciences, 39(1): 37-46. DOI: 10.3878/j.issn.1006-9895.1406.13281
Citation: Yang Yuanhui, Shi Chunxiang. 2015: The Impact of Soil Moisture Initialization on the Direct Assimilation of Satellite Radiance Data. Chinese Journal of Atmospheric Sciences, 39(1): 37-46. DOI: 10.3878/j.issn.1006-9895.1406.13281

The Impact of Soil Moisture Initialization on the Direct Assimilation of Satellite Radiance Data

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  • Received Date: October 11, 2013
  • Revised Date: June 11, 2014
  • This study conducted direct assimilation experiments of microwave remote sensing data AMSU-A with the mesoscale numerical weather prediction model WRFV3.3.1 and its 3DVAR system. Our numerical simulation and assimilation experiment research focused on a heavy rainfall event that occurred at Jiangxi Province on June 19, 2010. We changed the soil moisture value in the initial field of the model and analyzed the impact of improved soil moisture accuracy on the model simulation and the directly assimilated emissivity data. Moreover, we adjusted the deviations in the observational data and the background conditions under different soil moisture conditions. The results show that:The output of the China Land Soil Moisture Data Assimilation System (CLSMDAS), after adjusting the soil moisture initial condition, simulates brightness temperature values that are much closer to actual observations. Much more observational data can be entered into the assimilation system after quality control and bias correction, so the improved soil moisture initial condition can be positively adjusted, especially in window channels such as band 3, with a frequency of 50.3 GHz. Soil moisture from the output of the CLSMDAS can better represent the trend of the rain belt, the drop zone of heavy rain, and the rain center and intensity. All these show us that more accurate initial soil moisture values can improve the results of satellite data assimilation, and thus increase the numerical model forecasting capability.
  • Cassardo C, Balsamo G P, Cacciamani C, et al. 2002. Impact of soil surface moisture initialization on rainfall in a limited area model: A case study of the 1995 South Ticino flash flood [J]. Hydrological Processes, 16 (6): 1301-1317.
    Chen F, Janjic Z, Mitchell K. 1997. Impact of atmospheric surface-layer parameterizations in the new land-surface scheme of the NCEP mesoscale ETA model [J]. Bound.-Layer Meteor., 85 (3): 391-421.
    Chen F, Mitchell K. 1999. Using GEWEX/ISLSCP forcing data to simulate global soil moisture fields and hydrological cycle for 1987-1988 [J]. J. Meteor. Soc. Japan, 77: 167-182.
    Chen F, Dudhia J. 2001. Coupling an advanced land-surface/hydrology model with the Penn State/NCAR MM5 modeling system. Part I: Model description and implementation [J]. Mon. Wea. Rev., 129: 569-585.
    董佩明, 薛纪善, 黄兵, 等. 2008. 数值天气预报中卫星资料同化应用现状和发展 [J]. 气象科技, 36 (1): 1-7. Dong Peiming, Xue Jishan, Huang Bing, et al. 2008. Application status and development of satellite data assimilation in numerical weather forecast [J]. Meteorological Science and Technology (in Chinese), 36 (1): 1-7.
    Joseph B K. 2004. Weather research and forecasting model: A technical overview [C]//84th AMS Annual Meeting, Seattle, U S A, Jan, 10-15.
    李安泰, 何宏让, 张云. 2012. WRF模式陆面参数扰动对一次西北暴雨影响的数值模拟 [J]. 高原气象, 31 (1): 65-75. Li Antai, He Hongrang, Zhang Yun. 2012. Numerical simulation of effect of WRF land surface parameter disturbance on a rainstorm in Northwest China [J]. Plateau Meteorology (in Chinese), 31 (1): 65-75.
    马红云, 郭品文, 宋洁. 2009. 耦合不同陆面方案的WRF模式对2007年7月江淮强降水过程的模拟 [J]. 大气科学, 33 (3): 557-567. Ma Hongyun, Guo Pinwen, Song Jie. 2009. Simulation of “2007.7” heavy rainfall case in the Changjiang-Huaihe Valley using the WRF model with different land surface schemes [J]. Chinese Journal of Atmospheric Sciences (in Chinese), 33 (3): 557-567.
    齐琳琳, 孙建华, 张小玲, 等. 2005. ATOVS资料在长江流域一次暴雨过程模拟中的应用 [J]. 大气科学, 29 (5): 780-794. Qi Linlin, Sun Jianhua, Zhang Xiaoling, et al. 2008. The ATOVS data assimilating experiments on the heavy rain over the Yangtze River basin [J]. Chinese Journal of Atmospheric Sciences (in Chinese), 29 (5): 780-794.
    Roads J Q, Chen S C, Kanamitsu M, et al. 1999. Surface water characteristics in NCEP global spectral model and reanalysis [J]. J. Geophys. Res., 104 (D16): 19307-19327.
    师春香, 谢正辉. 2008. 基于静止气象卫星观测的降水时间降尺度研究 [J]. 地理科学进展, 27 (4): 15-22. Shi Chunxiang, Xie Zhenghui. 2008. A time downscaling scheme of precipitation by using geostationary meteorological satellite data [J]. Progress in Geography (in Chinese), 27 (4): 15-22.
    师春香, 谢正辉, 钱辉, 等. 2011. 基于卫星遥感资料的中国区域土壤湿度EnKF数据同化 [J]. 中国科学: 地球科学, 41 (3): 375-385. Shi Chunxiang, Xie Zhenghui, Qian Hui, et al. 2011. China land soil moisture EnKF data assimilation based on satellite remote sensing data [J]. Sci. China Earth Sci., 54 (9): 1430-1440.
    张华, 丑纪范, 邱崇践. 2004. 西北太平洋威马逊台风结构的卫星观测同化分析 [J]. 科学通报, 49 (5): 493-498. Zhang Hua, Chou Jifan, Qiu Chongjian. 2004. The structure analysis of satellite observation assimilation of the Rammasun typhoon on Northwest Pacific Ocean [J]. Chinese Science Bulletin (in Chinese), 49 (5): 493-498.
    张生雷, 谢正辉, 师春香, 等. 2008. 集合Kalman滤波在土壤湿度同化中的应用 [J]. 大气科学, 32 (6): 1419-1430. Zhang Shenglei, Xie Zhenghui, Shi Chunxiang, et al. 2008. Applications of ensemble Kalman filter in soil moisture assimilation [J]. Chinese Journal of Atmospheric Sciences (in Chinese), 32 (6): 1419-1430.
    赵得明. 2005. 卫星遥感资料反演土壤湿度及其在数值模拟中的应用 [D]. 南京大学博士学位论文. Zhao Deming. 2005. Soil moisture retrieval from satellite remote sensing images and its application in numerical simulation [D]. Ph. D. dissertation (in Chinese), Department of Atmospheric Sciences, Nanjing University.
    Zhao D M, Su B K, Zhao M, et al. 2006. Soil moisture retrieval from satellite images and its application to heavy rain simulation in eastern China [J]. Adv. Atm. Sci., 23 (2): 299-316.
    朱晨, 师春香, 席琳, 等. 2013. 中国区域不同深度土壤湿度模拟和评估 [J]. 气象科技, 41 (3): 529-536. Zhu Chen, Shi Chunxiang, Xi Lin, et al. 2013. Simulation and assessment of soil moisture at different depths in China area [J]. Meteorological Science and Technology (in Chinese), 41 (3): 529-536.
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