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Full-Text Articles in Earth Sciences
Interannual And Subdecadal Variability In The Nutrient Geochemistry Of The Cariaco Basin, Mary I. Scranton, Gordon T. Taylor, Robert Thunell, Claudia R. Benitez-Nelson, Frank Muller-Karger, Kent Fanning, Laura Lorenzoni, Enrique Montes, Ramon Varela, Yrene Astor
Interannual And Subdecadal Variability In The Nutrient Geochemistry Of The Cariaco Basin, Mary I. Scranton, Gordon T. Taylor, Robert Thunell, Claudia R. Benitez-Nelson, Frank Muller-Karger, Kent Fanning, Laura Lorenzoni, Enrique Montes, Ramon Varela, Yrene Astor
Faculty Publications
The CARIACO Ocean Time Series program has made monthly measurements of oxygen, nutrients, and carbon system parameters (∑CO2, alkalinity, pH) in the Cariaco Basin since 1996. At the same time, sediment traps have collected settling particles at four to five depths ranging from 150 to 1,200 m. The depth of the transition from oxic to anoxic conditions has fluctuated dramatically over the time series due to changes in the occurrence of Caribbean water intrusions into the deep basin. Nutrient concentrations in the deep basin have increased steadily with time in a proportion reflective of the elemental ratios in the settling …
Small Phytoplankton Drive High Summertime Carbonand Nutrient Export In The Gulf Of California And Eastern Tropical North Pacific, Viena Puigcorbé, Claudia R. Benitez-Nelson, Pere Masqué, Elisabet Verdeny, Angelicque E. White, Brian N. Popp, Fredrick G. Prahl, Phoebe J. Lam
Small Phytoplankton Drive High Summertime Carbonand Nutrient Export In The Gulf Of California And Eastern Tropical North Pacific, Viena Puigcorbé, Claudia R. Benitez-Nelson, Pere Masqué, Elisabet Verdeny, Angelicque E. White, Brian N. Popp, Fredrick G. Prahl, Phoebe J. Lam
Faculty Publications
Summertime carbon, nitrogen, and biogenic silica export was examined using 234Th:238U disequilibria combined with free floating sediment traps and fine scale water column sampling with in situ pumps (ISP) within the Eastern Tropical North Pacific and the Gulf of California. Fine scale ISP sampling provides evidence that in this system, particulate carbon (PC) and particulate nitrogen (PN) concentrations were more rapidly attenuated relative to 234Th activities in small particles compared to large particles, converging to 1–5 µmol dpm−1 by 100 m. Comparison of elemental particle composition, coupled with particle size distribution analysis, suggests that small particles are major contributors to …