Journalartikel

Jahr der Veröffentlichung: 2003

Seiten: 1681-1681

Zeitschrift: Science

Bandnummer: 302

Heftnummer: 5651

DOI Link: https://doi.org/10.1126/science.302.5651.1681a

Verlag: American Association for the Advancement of Science

Abstract: 

There is a gap in the European carbon budget, as discovered by Janssens et al. in their recent Research Article “Europe's terrestrial biosphere absorbs 7 to 12% of European anthropogenic CO₂ emissions” (6 June, p. 1538). Seventy teragrams of carbon (C) absorbed by the biosphere per year is not recovered in terrestrial C stocks (corresponding to 7 g m⁻² year⁻¹). Janssens et al. hypothesize that “missing fluxes” may account for the gap in the C budget (their fig. 1). In a search for this missing C, I reviewed drainage fluxes of dissolved C that bypass terrestrial C pools to enter the hydrosphere. Drainage exports 4 g m⁻² year⁻¹ of dissolved organic C (0.4 to 19 g m⁻² year⁻¹) (1–9) and 7 g m⁻² year⁻¹ of dissolved inorganic C (0.6 to 21 g m⁻² year⁻¹) (10–18) from soils to the ground water and springs. The resulting flux of 11 ± 8 g m⁻² year⁻¹ of total dissolved C corresponds to riverine C export from European catchments of varying size (∼15 g m⁻² year⁻¹, 0.04 to 145,000 km²) (19). Hence, drainage from soils decouples the exchange of C between the atmosphere and the biosphere over large distances. At a European scale, the drainage flux corresponds to 114 ± 83 Tg of C and therefore fills the gap in the C budget noted by Janssens et al.

Harvard-Zitierstil: Siemens, J. (2003) The European carbon budget: A gap, Science, 302(5651), p. 1681. https://doi.org/10.1126/science.302.5651.1681a

APA-Zitierstil: Siemens, J. (2003). The European carbon budget: A gap. Science. 302(5651), 1681. https://doi.org/10.1126/science.302.5651.1681a