RT journal article
T1 Buffer properties in the Guadalquivir Estuary (SW Iberian Peninsula)
A1 Sánchez Rodríguez, Jairo
A1 Sirviente Alonso, Sara
A1 Sierra Padilla, Ana
A1 Gómiz Pascual, Juan Jesús
A1 Bolado Penagos, Marina
A1 Bruno Mejías, Miguel
A1 Forja Pajares, Jesús
A1 Ortega Díaz, Teodora
A2 Física Aplicada
A2 Química Física
K1 Inorganic carbon system
K1 Buffer factors
K1 Transport
K1 Estuaries
K1 Guadalquivir Estuary
AB The Guadalquivir Estuary (main source of continental waters to the Gulf of Cadiz) has a carbonate basin, which enables the transport of inorganic carbon to adjacent coastal areas. Therefore, in order to study the dynamic of the carbonate system and its buffer capacity, a total of 12 samplings were carried out from 2017 to 2022. Samplings included longitudinal transects and tidal cycles in different seasonal and tidal conditions. Total alkalinity (TA) and dissolved inorganic carbon (DIC) showed increased values upstream, while calcium (Ca2+) presented the highest values in most of the marine samples. The ranges values obtained for these three variables were of 2180–5140 μmol kg−1, 430–3950 μmol kg−1 and 1295–10,855 μmol kg−1 for TA, DIC and Ca2+, respectively. Two buffer factors (βDIC and βH) were also calculated to study the variability of the buffer capacity of the Guadalquivir Estuary. These indicate that the estuary is well buffered for salinities above 10, while the inner part is more vulnerable to acidification effects. Using a non-linear 1D hydrodynamic model, net inorganic carbon system transports were calculated, showing that the Guadalquivir Estuary is exporting TA, DIC and Ca2+ to the Gulf of Cadiz.
PB Elsevier
YR 2024
FD 2024
LK http://hdl.handle.net/10498/34014
UL http://hdl.handle.net/10498/34014
LA eng
NO This work was supported by the Spanish Program for Science and Technology (CICYT)
DS Repositorio Institucional de la Universidad de Cádiz
RD 08-nov-2026