Use of GNSS Tropospheric Products for Climate Monitoring (Working Group 3)

Olivier Bock 1 R. Pacione 2 F. Ahmed 1 A. Araszkiewicz 3 Z. Bałdysz 3 K. Balidakis 4 C. Barroso 5 Sophie Bastin 6 S. Beirle 7 J. Berckmans 8 J. Böhm 9 J. Bogusz 3 M. Bos 10 E. Brockmann 11 M. Cadeddu 12 B. Chimani 13 J. Douša 14 G. Elgered 15 M. Eliaš 14 R. Fernandes 10 M. Figurski 3 E. Fionda 16 M. Gruszczynska 3 G. Guerova 17 J. Guijarro 18 C. Hackman 19 R. Heinkelmann 4 J. Jones 20 S. Zengin Kazancı 21 A. Klos 3 D. Landskron 9 J. Martins 5 V. Mattioli 22 B. Mircheva 17 S. Nahmani 1 R. Nilsson 4 T. Ning 23 G. Nykiel 3 A. Parracho 1 E. Pottiaux 8 A. Ramos 24 P. Rebischung 1 A. Sá 25 W. Dorigo 9 H. Schuh 4 G. Stankunavicius 26 K. Stępniak 27 H. Valentim 10 R. van Malderen 8 P. Viterbo 5 P. Willis 1 A. Xaver 9
Abstract : There has been growing interest in recent years in the use of homogeneously reprocessed ground-based GNSS, VLBI, and DORIS measurements for climate applications. Existing datasets are reviewed and the sensitivity of tropospheric estimates to the processing details is discussed. The uncertainty in the derived IWV estimates and linear trends is around 1 kg m−2 RMS and ± 0.3 kg m−2 per decade, respectively. Standardized methods for ZTD outlier detection and IWV conversion are proposed. The homogeneity of final time series is limited however by changes in the stations equipment and environment. Various homogenization algorithms have been evaluated based on a synthetic benchmark dataset. The uncertainty of trends estimated from the homogenized times series is estimated to ±0.5 kg m−2 per decade. Reprocessed GNSS IWV data are analysed along with satellites data, reanalyses and global and regional climate model simulations. A selection of global and regional reprocessed GNSS datasets and ERA-interim reanalysis are made available through the GOP-TropDB tropospheric database and online service. A new tropo SINEX format, providing new features and simplifications, was developed and it is going to be adopted by all the IAG services.
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Submitted on : Tuesday, September 17, 2019 - 5:45:00 PM
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Olivier Bock, R. Pacione, F. Ahmed, A. Araszkiewicz, Z. Bałdysz, et al.. Use of GNSS Tropospheric Products for Climate Monitoring (Working Group 3). Jonathan Jones, Guergana Guerova, Jan Douša, Galina Dick, Siebren de Haan, Eric Pottiaux, Olivier Bock, Rosa Pacione, Roeland van Malderen (eds). Advanced GNSS Tropospheric Products for Monitoring Severe Weather Events and Climate, Springer International Publishing, pp.267-402, 2020, 978-3-030-13900-1. ⟨10.1007/978-3-030-13901-8_5⟩. ⟨insu-02290597⟩

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