IWV retrieval from ground GNSS receivers during NAWDEX
A ground-based network of more than 1200 Global Navigation Satellite System (GNSS) Continuously Operating Reference Stations (CORS) was analysed using GIPSY-OASIS II software package for the documentation of time and space variations of water vapor in atmosphere during the North Atlantic Waveguide a...
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Copernicus Publications
2021
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00055442 2024-09-15T18:09:57+00:00 IWV retrieval from ground GNSS receivers during NAWDEX Bosser, Pierre Bock, Olivier 2021-02 electronic https://doi.org/10.5194/adgeo-55-13-2021 https://noa.gwlb.de/receive/cop_mods_00055442 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055093/adgeo-55-13-2021.pdf https://adgeo.copernicus.org/articles/55/13/2021/adgeo-55-13-2021.pdf eng eng Copernicus Publications Advances in Geosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2625759 -- http://www.adv-geosci.net/volumes.html -- 1680-7359 https://doi.org/10.5194/adgeo-55-13-2021 https://noa.gwlb.de/receive/cop_mods_00055442 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055093/adgeo-55-13-2021.pdf https://adgeo.copernicus.org/articles/55/13/2021/adgeo-55-13-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/adgeo-55-13-2021 2024-06-26T04:41:37Z A ground-based network of more than 1200 Global Navigation Satellite System (GNSS) Continuously Operating Reference Stations (CORS) was analysed using GIPSY-OASIS II software package for the documentation of time and space variations of water vapor in atmosphere during the North Atlantic Waveguide and Downstream impact EXperiment (NAWDEX) during fall 2016. The network extends throughout the North Atlantic, from the Caribbeans to Morocco through Greenland. This paper presents the methodology used for GNSS data processing, screening, and conversion of Zenith Tropospheric Delay (ZTD) estimates to Integrated Water Vapor content (IWV) using surface parameters from reanalysis. The retrieved IWV are used to evaluate the European Centre for Medium-Range Weather Forecasts (ECMWF) reanalyses ERAI and ERA5. ERA5 shows an overall improvement over ERAI in representing the spatial and temporal variability of IWV over the study area. The mean bias is decreased from 0.31±0.63 to 0.19±0.56 kg m−2 (mean ±1σ over all stations) and the standard deviation reduced from 2.17±0.67 to 1.64±0.53 kg m−2 combined with a slight improvement in correlation coefficient from 0.95 to 0.97. At regional scale, both reanalyses show a general wet bias at mid and northern latitudes but a dry bias in the Caribbeans. We hypothesize this results from the different nature of data being assimilated over the tropical oceans. This GNSS IWV data set is intended to be used for a better description of the high impact weather events that occurred during the NAWDEX experiment. Article in Journal/Newspaper Greenland North Atlantic Niedersächsisches Online-Archiv NOA Advances in Geosciences 55 13 22 |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Bosser, Pierre Bock, Olivier IWV retrieval from ground GNSS receivers during NAWDEX |
topic_facet |
article Verlagsveröffentlichung |
description |
A ground-based network of more than 1200 Global Navigation Satellite System (GNSS) Continuously Operating Reference Stations (CORS) was analysed using GIPSY-OASIS II software package for the documentation of time and space variations of water vapor in atmosphere during the North Atlantic Waveguide and Downstream impact EXperiment (NAWDEX) during fall 2016. The network extends throughout the North Atlantic, from the Caribbeans to Morocco through Greenland. This paper presents the methodology used for GNSS data processing, screening, and conversion of Zenith Tropospheric Delay (ZTD) estimates to Integrated Water Vapor content (IWV) using surface parameters from reanalysis. The retrieved IWV are used to evaluate the European Centre for Medium-Range Weather Forecasts (ECMWF) reanalyses ERAI and ERA5. ERA5 shows an overall improvement over ERAI in representing the spatial and temporal variability of IWV over the study area. The mean bias is decreased from 0.31±0.63 to 0.19±0.56 kg m−2 (mean ±1σ over all stations) and the standard deviation reduced from 2.17±0.67 to 1.64±0.53 kg m−2 combined with a slight improvement in correlation coefficient from 0.95 to 0.97. At regional scale, both reanalyses show a general wet bias at mid and northern latitudes but a dry bias in the Caribbeans. We hypothesize this results from the different nature of data being assimilated over the tropical oceans. This GNSS IWV data set is intended to be used for a better description of the high impact weather events that occurred during the NAWDEX experiment. |
format |
Article in Journal/Newspaper |
author |
Bosser, Pierre Bock, Olivier |
author_facet |
Bosser, Pierre Bock, Olivier |
author_sort |
Bosser, Pierre |
title |
IWV retrieval from ground GNSS receivers during NAWDEX |
title_short |
IWV retrieval from ground GNSS receivers during NAWDEX |
title_full |
IWV retrieval from ground GNSS receivers during NAWDEX |
title_fullStr |
IWV retrieval from ground GNSS receivers during NAWDEX |
title_full_unstemmed |
IWV retrieval from ground GNSS receivers during NAWDEX |
title_sort |
iwv retrieval from ground gnss receivers during nawdex |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/adgeo-55-13-2021 https://noa.gwlb.de/receive/cop_mods_00055442 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055093/adgeo-55-13-2021.pdf https://adgeo.copernicus.org/articles/55/13/2021/adgeo-55-13-2021.pdf |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_relation |
Advances in Geosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2625759 -- http://www.adv-geosci.net/volumes.html -- 1680-7359 https://doi.org/10.5194/adgeo-55-13-2021 https://noa.gwlb.de/receive/cop_mods_00055442 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055093/adgeo-55-13-2021.pdf https://adgeo.copernicus.org/articles/55/13/2021/adgeo-55-13-2021.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/adgeo-55-13-2021 |
container_title |
Advances in Geosciences |
container_volume |
55 |
container_start_page |
13 |
op_container_end_page |
22 |
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1810447560060436480 |