 |
| Titel |
Biogeochemistry, transport fluxes and emission of greenhouse gases from the Niger River (West Africa): preliminary results after two years of monitoring |
| VerfasserIn |
François Darchambeau, Steven Bouillon, Bassirou Alhou, Alberto V. Borges |
| Konferenz |
EGU General Assembly 2013
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250081954
|
|
|
|
|
|
| Zusammenfassung |
| The Niger River is Africa’s third longest river and drains an area of ~2,120,000 km2. It
encompasses six hydrographic regions and crosses almost all possible ecosystem zones in
West Africa. Yet, there is surprisingly little or no information on carbon (C) and
nitrogen (N) cycling in this river. Here, we report initial results of a monitoring
campaign whereby 2-weekly samples have been collected at Niamey (Niger) [2.01Ë E
13.57Ë N] between April 2011 and March 2013 for a suite of physico-chemical and
biogeochemical characteristics, including total suspended matter (TSM) concentrations,
quantification and stable isotope composition of particulate organic carbon (POC
and δ13C-POC) and particulate nitrogen (PN and δ15N-PN), dissolved organic
carbon (DOC δ13C-DOC) and dissolved inorganic carbon (DIC and δ13C-DIC),
concentration of greenhouse gases (GHGs) (partial pressure of CO2, CH4 and N2O), as
well as major elements, total alkalinity, and oxygen isotope signatures of water
(δ18O-H2O). This dataset allows us to construct an annual budget for both particulate and
dissolved carbon fluxes, as well as a first seasonally resolved characterisation of the
matter transported by the Niger River and of the GHGs emitted to the atmosphere. |
|
|
|
|
|
|