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Dissolution of Calcium Carbonate: Observations and Model Results in the North Atlantic : Volume 3, Issue 5 (18/10/2006)

By Friis, K.

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Book Id: WPLBN0003975176
Format Type: PDF Article :
File Size: Pages 24
Reproduction Date: 2015

Title: Dissolution of Calcium Carbonate: Observations and Model Results in the North Atlantic : Volume 3, Issue 5 (18/10/2006)  
Author: Friis, K.
Volume: Vol. 3, Issue 5
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Dutkiewicz, S., Johnson, K. M., Najjar, R. G., Follows, M. J., Körtzinger, A., & Friis, K. (2006). Dissolution of Calcium Carbonate: Observations and Model Results in the North Atlantic : Volume 3, Issue 5 (18/10/2006). Retrieved from

Description: Pennsylvania State University, Department of Meteorology, 503 Walker Building, University Park, PA 16802-5013, USA. We investigate the significance of in situ dissolution of calcium carbonate above its saturation horizons. The study relies on observations from the open subpolar North Atlantic [sNA] and on 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 CaCO3 saturation horizons, and precisely-defined pre-formed alkalinity. Based on the analysis of a comprehensive alkalinity data set we find that SDCCD does not appear to be a significant process in the open sNA. The results from the model support the observational findings and do not indicate a significant need of SDCCD to explain observed patterns of alkalinity in the North Atlantic. Instead our investigation points to the importance of mixing processes for the redistribution of alkalinity from dissolution of CaCO3 from below its saturation horizons. However, mixing has recently been neglected for a number of studies that called for SDCCD in the sNA and on global scale.

Dissolution of calcium carbonate: observations and model results in the North Atlantic


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