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GNSS-based water vapor estimation and validation during the MOSAiC expedition

Männel, Benjamin and Zus, Florian and Dick, Galina and Glaser, Susanne and Semmling, Maximilian and Balidakis, Kyriakos and Wickert, Jens and Maturilli, Marion and Dahlke, Sandro and Schuh, Harald (2021) GNSS-based water vapor estimation and validation during the MOSAiC expedition. Atmospheric Measurement Techniques (AMT) (14), pp. 5127-5138. Copernicus Publications. doi: 10.5194/amt-14-5127-2021. ISSN 1867-1381.

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Official URL: https://amt.copernicus.org/articles/14/5127/2021/

Abstract

Within the transpolar drifting expedition MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate), the Global Navigation Satellite System (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 (ZTDs) were determined using a kinematic precise point positioning (PPP) approach. The derived ZTD values agree to 1.1 ± 0.2 mm (root mean square (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.

Item URL in elib:https://elib.dlr.de/142424/
Document Type:Article
Title:GNSS-based water vapor estimation and validation during the MOSAiC expedition
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Männel, BenjaminHelmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, GermanyUNSPECIFIED
Zus, FlorianHelmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, GermanyUNSPECIFIED
Dick, Galinagalina.dick (at) gfz-potsdam.deUNSPECIFIED
Glaser, Susannesusanne.glaser (at) gfz-potsdam.deUNSPECIFIED
Semmling, MaximilianMaximilian.Semmling (at) dlr.deUNSPECIFIED
Balidakis, Kyriakoskyriakos.balidakis (at) gfz-potsdam.deUNSPECIFIED
Wickert, Jenswickert (at) gfz-potsdam.deUNSPECIFIED
Maturilli, MarionMarion.Maturilli (at) awi.deUNSPECIFIED
Dahlke, Sandrosandro.dahlke (at) awi.deUNSPECIFIED
Schuh, Haraldharald.schuh (at) gfz-potsdam.deUNSPECIFIED
Date:2021
Journal or Publication Title:Atmospheric Measurement Techniques (AMT)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.5194/amt-14-5127-2021
Page Range:pp. 5127-5138
Publisher:Copernicus Publications
ISSN:1867-1381
Status:Published
Keywords:GNSS, water vapor
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication, Navigation, Quantum Technology
DLR - Research area:Raumfahrt
DLR - Program:R KNQ - Communication, Navigation, Quantum Technology
DLR - Research theme (Project):R - Ionosphere
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics > Space Weather Observation
Deposited By: Semmling, Dr. Maximilian
Deposited On:16 Aug 2021 14:35
Last Modified:16 Aug 2021 14:35

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