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  The SPARC water vapor assessment II: intercomparison of satellite and ground-based microwave measurements

Nedoluha, G. E., Kiefer, M., Lossow, S., Gomez, R. M., Kämpfer, N., Lainer, M., et al. (2017). The SPARC water vapor assessment II: intercomparison of satellite and ground-based microwave measurements. Atmospheric Chemistry and Physics, 17, 14543-14558. doi:10.5194/acp-17-14543-2017.

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 Urheber:
Nedoluha, Gerald E., Autor
Kiefer, Michael, Autor
Lossow, Stefan, Autor
Gomez, R. Michael, Autor
Kämpfer, Niklaus, Autor
Lainer, Martin, Autor
Forkman, Peter, Autor
Christensen, Ole Martin, Autor
Oh, Jung Jin, Autor
Hartogh, Paul1, Autor           
Anderson, John, Autor
Bramstedt, Klaus, Autor
Dinelli, Bianca M., Autor
Garcia-Comas, Maya, Autor
Hervig, Mark, Autor
Murtagh, Donal, Autor
Raspollini, Piera, Autor
Read, William G., Autor
Rosenlof, Karen, Autor
Stiller, Gabriele P., Autor
Walker, Kaley A., Autor mehr..
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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Schlagwörter: -
 MPIS_GROUPS: Planets and Comets
 MPIS_PROJECTS: WASPAM
 Zusammenfassung: As part of the second SPARC (Stratosphere–troposphere Processes And their Role in Climate) water vapor assessment (WAVAS-II), we present measurements taken from or coincident with seven sites from which ground-based microwave instruments measure water vapor in the middle atmosphere. Six of the ground-based instruments are part of the Network for the Detection of Atmospheric Composition Change (NDACC) and provide datasets that can be used for drift and trend assessment. We compare measurements from these ground-based instruments with satellite datasets that have provided retrievals of water vapor in the lower mesosphere over extended periods since 1996. We first compare biases between the satellite and ground-based instruments from the upper stratosphere to the upper mesosphere. We then show a number of time series comparisons at 0.46 hPa, a level that is sensitive to changes in H2O and CH4 entering the stratosphere but, because almost all CH4 has been oxidized, is relatively insensitive to dynamical variations. Interannual variations and drifts are investigated with respect to both the Aura Microwave Limb Sounder (MLS; from 2004 onwards) and each instrument's climatological mean. We find that the variation in the interannual difference in the mean H2O measured by any two instruments is typically  ∼  1%. Most of the datasets start in or after 2004 and show annual increases in H2O of 0–1 % yr−1. In particular, MLS shows a trend of between 0.5 % yr−1 and 0.7 % yr−1 at the comparison sites. However, the two longest measurement datasets used here, with measurements back to 1996, show much smaller trends of +0.1 % yr−1 (at Mauna Loa, Hawaii) and −0.1 % yr−1 (at Lauder, New Zealand).

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Sprache(n): eng - English
 Datum: 2017-12-072017-12
 Publikationsstatus: Online veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.5194/acp-17-14543-2017
 Art des Abschluß: -

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Titel: Atmospheric Chemistry and Physics
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Katlenburg-Lindau, Germany : European Geosciences Union
Seiten: - Band / Heft: 17 Artikelnummer: - Start- / Endseite: 14543 - 14558 Identifikator: ISSN: 1680-7316
CoNE: https://pure.mpg.de/cone/journals/resource/111030403014016