| NCEP R1可降水量与西南地区地基GPS反演结果的比较 |
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| 引用本文： | 王维佳,赵兴炳,林丹.NCEP R1可降水量与西南地区地基GPS反演结果的比较[J].高原山地气象研究,2014,34(1):33-39. |
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| 作者姓名： | 王维佳 赵兴炳 林丹 |
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| 作者单位： | 1. 四川省人工影响天气办公室, 成都 610072; |
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| 基金项目： | 中国气象局西南区域气象中心重大科研业务项目“西南地区空中云水资源评估和开发利用研究”（西南区域气2011-02）、四川省气象局青年基金课题“GPS水汽资料在人工影响天气中的应用”（川气课题2011-青年-05） |
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| 摘 要： | NCEP/NCAR再分析资料是国内外广泛应用的再分析资料数据集,提供有自1948年以来的全球可降水量数据,为研究全球和区域水汽分布提供了时空分布均匀的资料。地基GPS反演可降水量是近些年新兴的水汽监测手段。自2007年开始,我国西南地区(四川省、重庆市、云南省、贵州省)的GPS气象观测站网提供该区域全天24h的可降水量资料。本文在分析NCEP再分析资料可降水量与地基GPS反演可降水量算法和生成方式等根本性差异的基础上,对西南地区的NCEP再分析资料与地基GPS反演可降水量数据加以对比研究,发现两套资料能够一致地揭示我国西南地区的可降水量分布形势和季节变化特征,均能很好地反映区域水汽特征和变化。同时还发现NCEP再分析资料可降水量数据与地基GPS反演结果具有明显的线性相关特征与一致性。此外,也发现NCEP再分析资料可降水量数据与地基GPS反演可降水量结果存在一定的定量差异。
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| 关 键 词： | 水汽 地基GPS NCEP再分析资料 可降水量 |
| 收稿时间： | 2013-10-15 |
Comparison of Precipitable Water from NCEP R1 Datasets and Ground-based GPS Measurements |
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| WANG Weijia,ZHAO Xingbing,LIN Dan.Comparison of Precipitable Water from NCEP R1 Datasets and Ground-based GPS Measurements[J].Plateau and Mountain Meteorology Research,2014,34(1):33-39. |
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| Authors: | WANG Weijia ZHAO Xingbing LIN Dan |
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| Institution: | 1. Weather Modification Office of Sichuan Province, Chengdu 610072, China;2. Institute of Plateau Meteorology, CMA, Chengdu 610072, China |
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| Abstract: | The NCEP/NCAR Reanalysis 1 datasets including global preeipitable water data since 1948 have been widely applied around the world, which have provided homogenously spatial and temporal distributed data for global and regional water vapor study. As a new method to estimate water vapor, ground -based GPS measurements have been developed in recent years. The GPS/Meteorology sites in Southwest China（ Sichuan, Chongqing, Yunnan, Guizhou） have provided regional precipitable water estimates 24hrs per day since 2007. Based on the analysis on the fundamental differences of their algorithms and temporal and spatial coverage and so on, this paper compares preeipitable water values from GPS measurements and NCEP R1 in Southwest China. The analysis shows that the two datasets could show consistent characteristics of distribution and seasonal variation of precipitable water in Southwest China. Both GPS measurements and NCEP R1 could show the spatial - temporal characteristics and variation of regional water vapor. Meanwhile, precipitable water values from GPS measurements and NCEP R1 are linearly correlated and similar. Besides, quantitative differences between precipitable water values from NCEP R1 and GPS measurements are found as well. |
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| Keywords: | water vapor ground - based GPS NCEP reanalysis data precipitable water |
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