同化自动站资料建立三峡地区2014年1月高分辨率温度场的模拟研究
投稿时间: 2017-02-20  最后修改时间: 2017-03-31  点此下载全文
引用本文:
摘要点击次数: 203
全文下载次数: 
作者单位E-mail
祝亚鹏 南京信息工程大学气象灾害预报预警与评估协同创新中心气象灾害教育部重点实验室 1309650067@qq.com 
江志红 南京信息工程大学气象灾害预报预警与评估协同创新中心气象灾害教育部重点实验室 zhjiang@nuist.edu.cn 
马红云 南京信息工程大学气象灾害预报预警与评估协同创新中心气象灾害教育部重点实验室  
邱欣 Novus环境公司安大略省加拿大  
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:摘要:本文利用WRF(Weather Research Forecast)模式及其自带的Nudging同化系统,结合通过质量控制后的三峡地区2014年1月份的2588个自动站的观测资料,进行同化自动站观测试验建立了三峡地区3km高分辨率的气温场,其效果与加入NCEP稀疏观测站点的稀疏场试验和未同化试验在月平均温度场和逐时温度变化两个方面进行了综合对比分析,结果表明:与未同化试验相比,同化自动站后,平均气温场偏差在大部分地区都减小到±0.5℃以内;气温逐时绝对偏差在平原、丘陵、山区三种地形上均减小到1℃以内,逐时气温相关系数都达到0.9以上,偏差范围减小1.14℃以上,均方根误差减幅达0.55℃以上;从泰勒图中可看出同化自动站后相对标准差在平原和丘陵都接近于1,山区也减小到1.11。同化自动站试验结果也优于同化稀疏场试验,其对三峡地区2014年1月份的气温场具有良好的建立效果,这为该地区建立高分辨率温度场提供了有效参考。
中文关键词:WRF模式  自动站观测  Nudging  资料同化  三峡地区  高分辨率
 
The simulation study of establishing for high resolution temperature field in the Three Gorges area in January 2014 by assimilating automatic station data
Abstract:Abstract:In this paper, WRF (Weather Research Forecast) model and its own Nudging assimilation system, combined with the observation data of 2588 automatic stations in the Three Gorges area in January, 2014, were used to carry out the assimilation automatic station observation experiment to establish the High-resolution temperature field of 3km in the Three Gorges area.The effect of temperature field and the assimilation test of non-assimilation data and the sparse field test of NCEP sparse observation station were carried out on the monthly mean temperature field and the hourly temperature change. Comprehensive comparative analysis.The results show that the average temperature field error is reduced to within ± 0.5 ℃ in most areas after assimilation automatic station test; the absolute deviation of the hourly temperature in the three terrain of plain , hills and mountain was reduced to less than 1℃,the correlation coefficient of the hourly temperature is above 0.9, the temperature deviation range of three terrain are reduced 1.14 ℃ above, root mean square error reduction of 0.55 ℃ or more compared to the non-assimilation experiment.The relative standard deviation in plains and hills are close to 1 and the mountain area is also reduced to 1.11 in the Taylor chart.The assimilation automatic station test is aslo superior to the assimilation sparse field test. The assimilation automatic station test has a good effect on the establishing of temperature field of the Three Gorges area in January 2014 , which provides an effective reference for the establishment of high resolution temperature field in this area.
keywords:WRF model  automatic station observation  Nudging  data assimilation  Three Gorges area  high resolution
查看全文  查看/发表评论  下载PDF阅读器