Dissolution of calcium carbonate in the North Atlantic
نویسندگان
چکیده
Dissolution of calcium carbonate: observations and model results in the North Atlantic K. Friis, R. G. Najjar, M. J. Follows, S. Dutkiewicz, A. Körtzinger, and K. M. Johnson Pennsylvania State University, Department of Meteorology, 503 Walker Building, University Park, PA 16802-5013, USA Massachusetts Institute of Technology, Department of Earth, Atmosphere and Planetary Sciences, 77 Massachusetts Av., Cambridge, MA 02139, USA Leibniz-Institut für Meereswissenschaften an der Universität Kiel, Marine Biogeochemistry, Düsternbrooker Weg 20, 24105 Kiel, Germany now at: Dechema e.V., Theodor-Heuss-Allee 25, 60486 Frankfurt am Main, Germany Received: 29 September 2006 – Accepted: 14 October 2006 – Published: 18 October 2006 Correspondence to: K. Friis ([email protected])
منابع مشابه
Dissolution of calcium carbonate: observations and model results in the subpolar North Atlantic
We investigate the significance of in situ dissolution of calcium carbonate above its saturation horizons using observations from the open subpolar North Atlantic [sNA] and to a lesser extent a 3-D biogeochemical model. The sNA is particularly well suited for observation-based detections of in situ, i.e. shallow-depth CaCO3 dissolution [SDCCD] as it is a region of high CaCO3 production, deep Ca...
متن کاملCalcium Acetate Versus Calcium Carbonate as Oral Phosphate Binder: Preparation and In Vitro Assessment
Calcium acetate is used as an oral phosphate binder to control hyperphosphatemia in patients with chronic renal failure. Compared to calcium carbonate, control of hyperphosphatemia can be achieved at lower calcium administration with calcium acetate which likely reduces the risk of hypercalcemia. In this study, various formulations of calcium acetate tablets were prepared and their disint...
متن کاملProcesses determining the marine alkalinity and calcium carbonate saturation state distributions
We introduce a composite tracer for the marine system, Alk, that has a global distribution primarily determined by CaCO3 precipitation and dissolution. Alk ∗ is also affected by riverine alkalinity from dissolved terrestrial carbonate minerals. We estimate that the Arctic receives approximately twice the riverine alkalinity per unit area as the Atlantic, and 8 times that of the other oceans. Ri...
متن کاملImprovements on the back - calculation technique for estimating anthropogenic CO
The back-calculation technique for evaluating the anthropogenic CO2 (CANT) input corrects total inorganic carbon for the remineralization of organic matter and the dissolution of calcium carbonate, along with subtracting the pre-industrial equilibrium total inorganic carbon. This technique is mainly dependent on the estimation of the preformed values of total alkalinity, oxygen and partial pres...
متن کاملModeling the dissolution of settling CaCO3 in the ocean
concentration, which, on glacial-interglacial timescales, is involved in the regulation of atmospheric pCO2. The saturation state of the ocean with respect to calcium carbonate suggests that any dissolution of calcium carbonate takes place not in the water column but at the seafloor. On the other hand, several authors suggest that a significant part of the dissolution takes place in the upper p...
متن کامل