大地测量与地球动力学2025，Vol.45Issue(8)：771-780,10.DOI:10.14075/j.jgg.2024.12.552
格陵兰地区GNSS反演PWV分析
GNSS-Retrieved PWV in the Greenland Region
摘要
Abstract
Based on hourly-resolution zenith tropospheric delay(ZTD)data from 35 GNSS stations in the Greenland region spanning the period from 2010 to 2021,combined with ERA5 reanalysis datasets and Tm model,precipitable water vapor(PWV)over the region was retrieved.Subsequently,the prin-cipal seasonal and diurnal variation characteristics,including annual,semi-annual,diurnal,and semi-diurnal cycles,were investigated.The results indicate that the GNSS stations in Greenland exhibit a certain degree of autocorrelation,with the summer season showing weaker autocorrelation compared to other seasons.The amplitude of the annual component ranges from 2 to 7 mm,while that of the semi-annual component ranges from 0 to 3 mm,with relatively minor interannual variations in their phases.The maximum values occur in summer,and the minimum values in winter.The diurnal com-ponent is only pronounced at a few stations,with amplitudes around 0.08 mm.After removing the annual,semi-annual,and diurnal components from the time series to obtain the residual time series,the maximum RMSE ranges from 1.30 to 3.65 mm,with an average RMSE of 2.08 mm.Notably,the RMSE values are relatively higher in the northern region and lower in the southern region.关键词
格陵兰/大气可降水量/插值/GNSS/Tm/天顶对流层延迟Key words
Greenland/precipitable water vapor/interpolation/GNSS/Tm/zenith tropospheric delay分类
天文与地球科学引用本文复制引用
张胜凯,马杰,龚力,雷锦韬,李文浩,肖峰..格陵兰地区GNSS反演PWV分析[J].大地测量与地球动力学,2025,45(8):771-780,10.基金项目
国家重点研发计划(2023YFC2809103,2024YFC2813505) （2023YFC2809103,2024YFC2813505）
中央高校基本科研业务费专项(2042023gf0012,2042022dx0001). National Key Research and Development Program of China,No.2023YFC2809103,2024YFC2813505 （2042023gf0012,2042022dx0001）
Fundamental Research Funds for the Central Universities,No.2042023gf0012,2042022dx0001. （）
