TY - JOUR
T1 - Seasonal Variability in the Hydrological and Chemical Structure of the Suboxic Waters at the Cariaco Time-Series Station
AU - Astor, Y. M
AU - Scranton, M.
AU - Guzmán, L.
AU - Thunell, R.
AU - Muller-Karger, Frank E
AU - Taylor, G.
AU - Fanning, Kent
AU - Varela, R.
PY - 2006/1/1
Y1 - 2006/1/1
N2 - For more than ten years, the CARIACO Time-Series Program has studied seasonal patterns and interannual variability at the Cariaco Basin. Monthly core physical and biogeochemical observations have been collected since November 1995 at the CARIACO Time-Series station (10° 30' N, 64° 40' W). A region with suboxic conditions (oxygen and sulfide concentrations <1 >μM) is found at intermediate waters at the station. The characteristics of this region show time and space variability, depending on the dynamics of the water. In general, ammonium, nitrate and nitrite disappeared within the suboxic region, although there is a steep ammonium concentration increase with depth after the oxic-anoxic interface suggesting its consumption at this boundary. Our data shows that intrusions are a major factor in affecting the chemical characteristics of the water column.
AB - For more than ten years, the CARIACO Time-Series Program has studied seasonal patterns and interannual variability at the Cariaco Basin. Monthly core physical and biogeochemical observations have been collected since November 1995 at the CARIACO Time-Series station (10° 30' N, 64° 40' W). A region with suboxic conditions (oxygen and sulfide concentrations <1 >μM) is found at intermediate waters at the station. The characteristics of this region show time and space variability, depending on the dynamics of the water. In general, ammonium, nitrate and nitrite disappeared within the suboxic region, although there is a steep ammonium concentration increase with depth after the oxic-anoxic interface suggesting its consumption at this boundary. Our data shows that intrusions are a major factor in affecting the chemical characteristics of the water column.
KW - Cariaco basin
KW - Intrusions
KW - Oxic-anoxic interface
KW - Ventilation
UR - https://digitalcommons.usf.edu/msc_facpub/1112
UR - https://doi.org/10.4067/S0717-65382006000300002
U2 - 10.4067/S0717-65382006000300002
DO - 10.4067/S0717-65382006000300002
M3 - Article
VL - 70
JO - Gayana
JF - Gayana
ER -