Stable isotopic composition of riverine dissolved inorganic carbone of the Xijiang River Inner Estuary

Auteur(s) et Affiliation(s)



Description :
For researching the spatio-temporal variation of the stable isotopic composition of the riverine dissolved inorganic carbon (DIC), the AA. had carried out a survey throughout the hydrologic year during which the δC13 of the surface water and its physicochemical parameter were examined along the Xijiang River Inner Estuarine waterway from September 2006 to June 2007. There was a striking seasonal variation on the average δC13. The riverine δC13(DIC) was controlled by decomposed condition of the riverine organic matter linking the seasonal variation of the physicochemical parameter in the surface water according to the correlation analysis which indicated notable relations between δC13(DIC) and water temperature or between δC13(DIC) and oxide-reduction potential. In view of the riverine δC13(DIC)decreasing for the decomposition of the terrestrial organic matter in the rainy season in summer and increasing for the briny invaded zone extending in the spring dry season along the waterway from the Makou gauging station to the Modaomen outlet, the δC13(DIC) spatio-temporal variation was closely related to the geographical environment of the Xijiang drainage basin.


Type de document :
Article de périodique

Source :
Journal of geographical sciences. Acta geographica sinica, issn : 1009-637X, 2008, vol. 18, n°. 3, p. 363-372, nombre de pages : 10, Références bibliographiques : 25 ref.

Date :
2008

Editeur :
Pays édition : Chine