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| Titel |
Drivers of column-average CO2 variability at Southern Hemispheric Total Carbon Column Observing Network sites |
| VerfasserIn |
N. M. Deutscher, V. Sherlock, S. E. Mikaloff Fletcher, D. W. T. Griffith, J. Notholt, R. Macatangay, B. J. Connor, J. Robinson, H. Shiona, V. A. Velazco, Y. Wang, P. O. Wennberg, D. Wunch |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 18 ; Nr. 14, no. 18 (2014-09-18), S.9883-9901 |
| Datensatznummer |
250119046
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| Publikation (Nr.) |
 copernicus.org/acp-14-9883-2014.pdf |
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| Zusammenfassung |
| We investigate factors that drive the variability in total column CO2 at
the Total Carbon Column Observing Network sites in the Southern Hemisphere
using fluxes tagged by process and by source region from the CarbonTracker
analysed product as well as the Simple Biosphere model. We show that the
terrestrial biosphere is the largest driver of variability in the Southern
Hemisphere column CO2. However, it does not dominate in the same fashion
as in the Northern Hemisphere. Local- and hemispheric-scale biomass burning
can also play an important role, particularly at the tropical site, Darwin.
The magnitude of seasonal variability in the column-average dry-air mole
fraction of CO2, XCO2, is also much smaller in the
Southern Hemisphere and comparable in magnitude to the annual increase.
Comparison of measurements to the model simulations highlights that there is
some discrepancy between the two time series, especially in the early part of
the Darwin data record. We show that this mismatch is most likely due to
erroneously estimated local fluxes in the Australian tropical region, which
are associated with enhanced photosynthesis caused by early rainfall during
the tropical monsoon season. |
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