利用ERA5资料进行桂林地区GNSS水汽反演精度分析
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中图分类号:

P227

基金项目:

国家自然科学基金(41864002,41704027,41664002);广西"八桂学者"岗位专项;广西自然科学基金(2017GXNSFDA198016,2017GXNSFBA198139,2018GXNSFAA281182);广西空间信息与测绘重点实验室基金(16-380-25-01,15-140-07-19)


Accuracy of ERA5 reanalysis data in retrieving GNSS precipitable water vapor over Guilin
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    摘要:

    由于桂林地区地基GNSS站并未配置气象传感器,致使大量GNSS观测数据无法在大气水汽(PWV)监测中发挥作用.针对这一情况,本文将欧洲中期天气预报中心(ECMWF)最新发布的ERA5再分析资料中测站处的气压和温度气象数据加入到GNSS水汽反演中,并将反演结果与利用地面气象站反演的GNSS水汽做对比,以此评估ERA5在桂林地区反演GNSS水汽的精度和适用性.结果表明:1)以桂林地区2017年10个地面气象站的实测气压和温度数据为参考值,ERA5地表气压和温度的年均偏差分别为-0.35 hPa和0.86 K,年均均方根误差(RMSE)分别为0.65 hPa和1.66 K,该精度可用于GNSS水汽反演;2)以2017年6—7月GNSS利用地面气象站反演的PWV为参考值,ERA5反演的GNSS PWV的偏差和RMSE分别为0.17 mm和0.35 mm,且两者具较好的相关性和一致性.由此表明,ERA5地表温压产品可应用于桂林地区GNSS水汽反演,这些研究结果可为桂林地区的GNSS水汽反演及数据源的选用提供重要的参考依据.

    Abstract:

    Guilin's ground-based GNSS station cannot be fully exploited in Precipitable Water Vapor (PWV) monitoring,owing to its omission of meteorological sensors.Here we use the pressure and temperature data from ERA5 reanalysis as well as from Guilin's ground meteorological stations to retrieve the GNSS PWV,so as to evaluate the accuracy and applicability of ERA5 in GNSS PWV retrieval in Guilin.The results show that referenced with data of Guilin's 10 ground meteorological stations in 2017,the ERA5 data of surface pressure (annual bias:-0.35 hPa,annual RMSE:0.65 hPa) and temperature (annual bias:0.86 K,annual RMSE:1.66 K) are accurate enough for GNSS PWV retrieval.As for the GNSS PWV retrieval results,the ERA5 approach has an average bias of 0.17 mm and RMSE of 0.35 mm,which is well correlated and consistent with meteorological station approach.The above results validate the accuracy and applicability of ERA5 surface temperature and pressure products in GNSS PWV retrieval in Guilin,and provide reference for GNSS PWV retrieval and data selection in other regions.

    参考文献
    [1] 姚宜斌, 张顺, 孔建.GNSS空间环境学研究进展和展望[J].测绘学报, 2017, 46(10):1408-1420 YAO Yibin, ZHANG Shun, KONG Jian.Research progress and prospect of GNSS space environment science[J].Acta Geodaetica et Cartographica Sinica, 2017, 46(10):1408-1420
    [2] 黄良珂, 彭华, 刘立龙, 等.顾及垂直递减率函数的中国区域大气加权平均温度模型[J].测绘学报, 2020, 49(4):432-442 HUANG Liangke, PENG Hua, LIU Lilong, et al.An empirical atmospheric mean temperature model considering the lapse rate function for China[J].Acta Geodaetica et Cartographica Sinica, 2020, 49(4):432-442
    [3] Wang J H, Zhang L Y, Dai A G, et al.A near-global, 2-hourly data set of atmospheric precipitable water from ground based GPS measurements[J].Journal of Geophysical Research, 2007, 112(D11):D11107
    [4] 赵静旸, 宋淑丽, 朱文耀.ERA-Interim应用于中国地区地基GPS-PWV计算的精度评估[J].武汉大学学报(信息科学版), 2014, 39(8):935-939 ZHAO Jingyang, SONG Shuli, ZHU Wenyao.Accuracy assessment of applying ERA-Interim reanalysis data to calculate ground-based GPS/PWV over China[J].Geomatics and Information Science of Wuhan University, 2014, 39(8):935-939
    [5] 孟宪贵, 郭俊建, 韩永清.ERA5再分析数据适用性初步评估[J].海洋气象学报, 2018, 38(1):91-99 MENG Xiangui, GUO Junjian, HAN Yongqing.Preliminarily assessment of ERA5 reanalysis data[J].Journal of Marine Meteorology, 2018, 38(1):91-99
    [6] 王传辉, 姚叶青, 时刚.江淮地区ERA-Interim再分析与观测温度资料对比分析[J].气象, 2018, 44(9):1220-1228 WANG Chuanhui, YAO Yeqing, SHI Gang.Comparative analysis of ERA-Interim temperature reanalysis data and observations over Jianghuai region[J].Meteorological Monthly, 2018, 44(9):1220-1228
    [7] Zhao Q Z, Yang P F, Yao W Q, et al.Hourly PWV dataset derived from GNSS observations in China[J].Sensors (Basel), 2020, 20(1):231
    [8] Asken J, Nordius H.Estimation of tropospheric delay for microwaves from surface weather data[J].Radio Science, 1987, 22(3):379-386
    [9] Saastamoinen J.Contributions to the theory of atmospheric refraction[J].Bulletin Géodésique, 1972, 105(1):279-298
    [10] Jiang P, Ye S R, Chen D Z, et al.Retrieving precipitable water vapor data using GPS zenith delays and global reanalysis data in China[J].Remote Sensing, 2016, 8(5):389
    [11] 章传银, 郭春喜, 陈俊勇, 等.EGM 2008地球重力场模型在中国大陆适用性分析[J].测绘学报, 2009, 38(4):283-289 ZHANG Chuanyin, GUO Chunxi, CHEN Junyong, et al.EGM 2008 and its application analysis in Chinese mainland[J].Acta Geodaetica et Cartographica Sinica, 2009, 38(4):283-289
    [12] Wang X M, Zhang K F, Wu S Q, et al.Water vapor-weighted mean temperature and its impact on the determination of precipitable water vapor and its linear trend[J].Journal of Geophysical Research:Atmospheres, 2016, 121:833-852
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引用本文

莫智翔,黄玲,郭希,黄良珂,刘立龙,庞周洲,邓云飞.利用ERA5资料进行桂林地区GNSS水汽反演精度分析[J].南京信息工程大学学报(自然科学版),2021,13(2):131-137
MO Zhixiang, HUANG Ling, GUO Xi, HUANG Liangke, LIU Lilong, PANG Zhouzhou, DENG Yunfei. Accuracy of ERA5 reanalysis data in retrieving GNSS precipitable water vapor over Guilin[J]. Journal of Nanjing University of Information Science & Technology, 2021,13(2):131-137

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历史
  • 收稿日期:2020-12-31
  • 在线发布日期: 2021-05-21

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