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A decadal time series of water vapor and D/H isotope ratios above Zugspitze: Transport patterns to central Europe

Hausmann, P.; Sussmann, R.; Trickl, T.; Schneider, M.

Abstract:
We present vertical soundings (2005–2015) of tropospheric water vapor (H2O) and its D ∕ H isotope ratio (δD) derived from ground-based solar Fourier transform infrared (FTIR) measurements at Zugspitze (47° N, 11° E, 2964 m a.s.l.). Beside water vapor profiles with optimized vertical resolution (degrees of freedom for signal, DOFS,  =  2.8), {H2O, δD} pairs with consistent vertical resolution (DOFS  =  1.6 for H2O and δD) applied in this study. The integrated water vapor (IWV) trend of 2.4 [−5.8, 10.6] % decade−1 is statistically insignificant (95 % confidence interval). Under this caveat, the IWV trend estimate is conditionally consistent with the 2005–2015 temperature increase at Zugspitze (1.3 [0.5, 2.1] K decade−1), assuming constant relative humidity. Seasonal variations in free-tropospheric H2O and δD exhibit amplitudes of 140 and 50 % of the respective overall means. The minima (maxima) in January (July) are in agreement with changing sea surface temperature of the Atlantic Ocean.

Using extensive backward-trajectory analysis, distinct moisture pathways are identified depending on observed δD levels: low column-based δD va ... mehr

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Volltext §
DOI: 10.5445/IR/1000071812
Originalveröffentlichung
DOI: 10.5194/acp-17-7635-2017
Scopus
Zitationen: 2
Web of Science
Zitationen: 2
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 1680-7316, 1680-7324
urn:nbn:de:swb:90-718123
KITopen-ID: 1000071812
HGF-Programm 12.03.01 (POF III, LK 01)
Erschienen in Atmospheric chemistry and physics
Band 17
Heft 12
Seiten 7635-7651
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Nachgewiesen in Web of Science
Scopus
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