GNSS-based water vapor estimation and validation during the MOSAiC expedition
Within the transpolar drifting expedition MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate), GNSS was used among other techniques to monitor variations in atmospheric water vapor. Based on 15 months of continuously tracked GNSS data including GPS, GLONASS, and Galileo,...
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ftcopernicus:oai:publications.copernicus.org:amtd93482 2023-05-15T15:05:56+02:00 GNSS-based water vapor estimation and validation during the MOSAiC expedition Männel, Benjamin Zus, Florian Dick, Galina Glaser, Susanne Semmling, Maximilian Balidakis, Kyriakos Wickert, Jens Maturilli, Marion Dahlke, Sandro Schuh, Harald 2021-04-08 application/pdf https://doi.org/10.5194/amt-2021-79 https://amt.copernicus.org/preprints/amt-2021-79/ eng eng doi:10.5194/amt-2021-79 https://amt.copernicus.org/preprints/amt-2021-79/ eISSN: 1867-8548 Text 2021 ftcopernicus https://doi.org/10.5194/amt-2021-79 2021-04-12T16:22:14Z Within the transpolar drifting expedition MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate), GNSS was used among other techniques to monitor variations in atmospheric water vapor. Based on 15 months of continuously tracked GNSS data including GPS, GLONASS, and Galileo, epoch-wise coordinates and hourly zenith total delays (ZTD) were determined using a kinematic precise point positioning (PPP) approach. The derived ZTD values agree to 1.1 ± 0.2 mm (RMS of the differences 10.2 mm) with the numerical weather data of ECMWF’s latest reanalysis, ERA5, computed for the derived ship’s locations. This level of agreement is also confirmed by comparing the on-board estimates with ZTDs derived for terrestrial GNSS stations in Bremerhaven and Ny Ålesund and for the radio telescopes observing Very Long Baseline Interferometry in Ny Ålesund. Preliminary estimates of integrated water vapor derived from frequently launched radiosondes are used to assess the GNSS-derived integrated water vapor estimates. The overall difference of 0.08 ± 0.04 kg m −2 (RMS of the differences 1.47 kg m −2 ) demonstrates a good agreement between GNSS and radiosonde data. Finally, the water vapor variations associated with two warm air intrusion events in April 2020 are assessed. Text Arctic Ny Ålesund Ny-Ålesund Copernicus Publications: E-Journals Arctic Ny-Ålesund |
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Copernicus Publications: E-Journals |
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English |
description |
Within the transpolar drifting expedition MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate), GNSS was used among other techniques to monitor variations in atmospheric water vapor. Based on 15 months of continuously tracked GNSS data including GPS, GLONASS, and Galileo, epoch-wise coordinates and hourly zenith total delays (ZTD) were determined using a kinematic precise point positioning (PPP) approach. The derived ZTD values agree to 1.1 ± 0.2 mm (RMS of the differences 10.2 mm) with the numerical weather data of ECMWF’s latest reanalysis, ERA5, computed for the derived ship’s locations. This level of agreement is also confirmed by comparing the on-board estimates with ZTDs derived for terrestrial GNSS stations in Bremerhaven and Ny Ålesund and for the radio telescopes observing Very Long Baseline Interferometry in Ny Ålesund. Preliminary estimates of integrated water vapor derived from frequently launched radiosondes are used to assess the GNSS-derived integrated water vapor estimates. The overall difference of 0.08 ± 0.04 kg m −2 (RMS of the differences 1.47 kg m −2 ) demonstrates a good agreement between GNSS and radiosonde data. Finally, the water vapor variations associated with two warm air intrusion events in April 2020 are assessed. |
format |
Text |
author |
Männel, Benjamin Zus, Florian Dick, Galina Glaser, Susanne Semmling, Maximilian Balidakis, Kyriakos Wickert, Jens Maturilli, Marion Dahlke, Sandro Schuh, Harald |
spellingShingle |
Männel, Benjamin Zus, Florian Dick, Galina Glaser, Susanne Semmling, Maximilian Balidakis, Kyriakos Wickert, Jens Maturilli, Marion Dahlke, Sandro Schuh, Harald GNSS-based water vapor estimation and validation during the MOSAiC expedition |
author_facet |
Männel, Benjamin Zus, Florian Dick, Galina Glaser, Susanne Semmling, Maximilian Balidakis, Kyriakos Wickert, Jens Maturilli, Marion Dahlke, Sandro Schuh, Harald |
author_sort |
Männel, Benjamin |
title |
GNSS-based water vapor estimation and validation during the MOSAiC expedition |
title_short |
GNSS-based water vapor estimation and validation during the MOSAiC expedition |
title_full |
GNSS-based water vapor estimation and validation during the MOSAiC expedition |
title_fullStr |
GNSS-based water vapor estimation and validation during the MOSAiC expedition |
title_full_unstemmed |
GNSS-based water vapor estimation and validation during the MOSAiC expedition |
title_sort |
gnss-based water vapor estimation and validation during the mosaic expedition |
publishDate |
2021 |
url |
https://doi.org/10.5194/amt-2021-79 https://amt.copernicus.org/preprints/amt-2021-79/ |
geographic |
Arctic Ny-Ålesund |
geographic_facet |
Arctic Ny-Ålesund |
genre |
Arctic Ny Ålesund Ny-Ålesund |
genre_facet |
Arctic Ny Ålesund Ny-Ålesund |
op_source |
eISSN: 1867-8548 |
op_relation |
doi:10.5194/amt-2021-79 https://amt.copernicus.org/preprints/amt-2021-79/ |
op_doi |
https://doi.org/10.5194/amt-2021-79 |
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1766337622785916928 |