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Verfasst von:Batenburg, Anneke M. [VerfasserIn]   i
 Walter, S. [VerfasserIn]   i
 Pieterse, G. [VerfasserIn]   i
 Levin, Ingeborg [VerfasserIn]   i
 Schmidt, M. [VerfasserIn]   i
 Jordan, A. [VerfasserIn]   i
 Hammer, Samuel [VerfasserIn]   i
 Yver, C. [VerfasserIn]   i
 Röckmann, T. [VerfasserIn]   i
Titel:Temporal and spatial variability of the stable isotopic composition of atmospheric molecular hydrogen
Titelzusatz:observations at six EUROHYDROS stations
Verf.angabe:A.M. Batenburg, S. Walter, G. Pieterse, I. Levin, M. Schmidt, A. Jordan, S. Hammer, C. Yver, and T. Röckmann
E-Jahr:2011
Jahr:20 Jul 2011
Umfang:15 S.
Fussnoten:Gesehen am 02.03.2022
Titel Quelle:Enthalten in: Atmospheric chemistry and physics
Ort Quelle:Katlenburg-Lindau : EGU, 2001
Jahr Quelle:2011
Band/Heft Quelle:11(2011), 14, Seite 6985-6999
ISSN Quelle:1680-7324
Abstract:<p><strong class="journal-contentHeaderColor">Abstract.</strong> Despite the potential of isotope measurements to improve our understanding of the global atmospheric molecular hydrogen (H<sub>2</sub>) cycle, few H<sub>2</sub> isotope data have been published so far. Now, within the EUROpean network for atmospheric HYDRogen Observations and Studies project (EUROHYDROS), weekly to monthly air samples from six locations in a global sampling network have been analysed for H<sub>2</sub> mixing ratio (<i>m</i>(H<sub>2</sub>)) and the stable isotopic composition of the H<sub>2</sub> (&delta;(D,H<sub>2</sub>), hereafter referred to as &delta;D). The time series thus obtained now cover one to five years for all stations. This is the largest set of ground station observations of &delta;D so far. Annual average &delta;D values are higher at the Southern Hemisphere (SH) than at the Northern Hemisphere (NH) stations; the maximum is observed at Neumayer (Antarctica), and the minimum at the non-arctic NH stations. The maximum seasonal differences in &delta;D range from ≈18 &permil; at Neumayer to ≈45 &permil; at Schauinsland (Southern Germany); in general, seasonal variability is largest at the NH stations. The timing of minima and maxima differs per station as well. In Alert (Arctic Canada), the variations in &delta;D and <i>m</i>(H<sub>2</sub>) can be approximated as simple harmonic functions with a ≈5-month relative phase shift. This out-of-phase seasonal behaviour of &delta;D and <i>m</i>(H<sub>2</sub>) can also be detected, but delayed and with a ≈6-month relative phase shift, at Mace Head and Cape Verde. However, no seasonal &delta;D cycle could be observed at Schauinsland, which likely reflects the larger influence of local sources and sinks at this continental station. At the two SH stations, no seasonal cycle could be detected in the &delta;D data. If it is assumed that the sink processes are the main drivers of the observed seasonality in <i>m</i>(H<sub>2</sub>) and &delta;D on the NH, the relative seasonal variations can be used to estimate the relative sink strength of the two major sinks, deposition to soils and atmospheric oxidation by the hydroxyl (OH) radical. For the NH coastal and marine stations this analysis suggests that the relative contribution of soil uptake to the total annual H<sub>2</sub> removal increases with latitude.</p>
DOI:doi:10.5194/acp-11-6985-2011
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: https://doi.org/10.5194/acp-11-6985-2011
 Volltext: https://acp.copernicus.org/articles/11/6985/2011/
 DOI: https://doi.org/10.5194/acp-11-6985-2011
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1794368426
Verknüpfungen:→ Zeitschrift

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