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Approach for Simulating Acidification and the Carbon Cycle in the Salish Sea to Distinguish Regional Source Impacts

Publication number Date Published
14-03-002January 2014
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Author(s) Long, W. and T. Khangaonkar (PNNL); Roberts, M. and G. Pelletier (Ecology)
Description Global atmospheric carbon dioxide levels have been identified as the dominant contributor to declining pH in the marine waters of the Pacific Northwest. However, regional human contributions may worsen pH and aragonite saturation state. Aragonite is the form of calcium carbonate used in many shell-building organisms. Low pH or aragonite saturation could impair key components of the food web. This document describes an approach to (1) expand the existing Salish Sea dissolved oxygen model to evaluate pH and aragonite saturation and (2) quantify the relative influences of regional and global sources. This includes simulating total dissolved inorganic carbon and alkalinity through air-sea exchange, respiration, photosynthesis, nutrient gains and losses, sediment fluxes, and Pacific Ocean upwelled water. Critical information gaps remain. For related web pages, see link at Web Page (below). Also see Ocean Acidification and Washington State:
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Keywords acidification, Salish Sea, model, Puget Sound
WEB PAGE Puget Sound /Salish Sea Model

Quality Assurance Project Plan: Salish Sea Acidification Model Development