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  Reproducibility of GPS radio occultation data for climate monitoring: Profile-to-profile inter-comparison of CHAMP climate records 2002 to 2008 from six data centers

Ho, S., Hunt, D., Steiner, A., Mannucci, A. J., Kirchengast, G., Gleisner, H., Heise, S., v. Engeln, A., Marquardt, C., Sokolovskiy, S., Schreiner, W., Ao, C., Wickert, J., Syndergaad, S., Lauritsen, K., Leroy, S., Kursinski, R., Kuo, Y.-H., Scherllin-Pirscher, B., Foelsche, U., Schmidt, T., Gorbunov, M. (2012): Reproducibility of GPS radio occultation data for climate monitoring: Profile-to-profile inter-comparison of CHAMP climate records 2002 to 2008 from six data centers. - Journal of Geophysical Research, 117, D18.
https://doi.org/10.1029/2012JD017665

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 Urheber:
Ho, S.1, Autor
Hunt, D.1, Autor
Steiner, A.1, Autor
Mannucci, A. J.1, Autor
Kirchengast, G.1, Autor
Gleisner, H.1, Autor
Heise, Stefan2, Autor              
v. Engeln, A.1, Autor
Marquardt, C.1, Autor
Sokolovskiy, S.1, Autor
Schreiner, W.1, Autor
Ao, C.1, Autor
Wickert, Jens2, Autor              
Syndergaad, S.1, Autor
Lauritsen, K.1, Autor
Leroy, S.1, Autor
Kursinski, R.1, Autor
Kuo, Y.-H.1, Autor
Scherllin-Pirscher, B.1, Autor
Foelsche, U.1, Autor
Schmidt, Torsten2, Autor              Gorbunov, M.1, Autor mehr..
Affiliations:
1External Organizations, ou_persistent22              
21.1 GPS/GALILEO Earth Observation, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146025              

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 DDC: 550 - Earth sciences
 Zusammenfassung: To examine the claim that Global Positioning System (GPS) radio occultation (RO) data are useful as a benchmark data set for climate monitoring, the structural uncertainties of retrieved profiles that result from different processing methods are quantified. Profile-to-profile comparisons of CHAMP (CHAllenging Minisatellite Payload) data from January 2002 to August 2008 retrieved by six RO processing centers are presented. Differences and standard deviations of the individual centers relative to the inter-center mean are used to quantify the structural uncertainty. Uncertainties accumulate in derived variables due to propagation through the RO retrieval chain. This is reflected in the inter-center differences, which are small for bending angle and refractivity increasing to dry temperature, dry pressure, and dry geopotential height. The mean differences of the time series in the 8 km to 30 km layer range from −0.08% to 0.12% for bending angle, −0.03% to 0.02% for refractivity, −0.27 K to 0.15 K for dry temperature, −0.04% to 0.04% for dry pressure, and −7.6 m to 6.8 m for dry geopotential height. The corresponding standard deviations are within 0.02%, 0.01%, 0.06 K, 0.02%, and 2.0 m, respectively. The mean trend differences from 8 km to 30 km for bending angle, refractivity, dry temperature, dry pressure, and dry geopotential height are within ±0.02%/5 yrs, ±0.02%/5 yrs, ±0.06 K/5 yrs, ±0.02%/5 yrs, and ±2.3 m/5 yrs, respectively. Although the RO-derived variables are not readily traceable to the international system of units, the high precision nature of the raw RO observables is preserved in the inversion chain.

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 Datum: 2012
 Publikationsstatus: Final veröffentlicht
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 Identifikatoren: eDoc: 19186
GFZPOF: PT6 GPS-Meteorology
DOI: 10.1029/2012JD017665
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Titel: Journal of Geophysical Research
Genre der Quelle: Zeitschrift, SCI, Scopus
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Seiten: - Band / Heft: 117 (D18) Artikelnummer: - Start- / Endseite: - Identifikator: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals268