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      Failure to bloom: Intense upwelling results in negligible phytoplankton response and prolonged CO2 outgassing over the Oregon shelf

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          Evidence for upwelling of corrosive "acidified" water onto the continental shelf.

          The absorption of atmospheric carbon dioxide (CO2) into the ocean lowers the pH of the waters. This so-called ocean acidification could have important consequences for marine ecosystems. To better understand the extent of this ocean acidification in coastal waters, we conducted hydrographic surveys along the continental shelf of western North America from central Canada to northern Mexico. We observed seawater that is undersaturated with respect to aragonite upwelling onto large portions of the continental shelf, reaching depths of approximately 40 to 120 meters along most transect lines and all the way to the surface on one transect off northern California. Although seasonal upwelling of the undersaturated waters onto the shelf is a natural phenomenon in this region, the ocean uptake of anthropogenic CO2 has increased the areal extent of the affected area.
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            Global climate change and intensification of coastal ocean upwelling.

            A Bakun (1990)
            A mechanism exists whereby global greenhouse warning could, by intensifying the alongshore wind stress on the ocean surface, lead to acceleration of coastal upwelling. Evidence from several different regions suggests that the major coastal upwelling systems of the world have been growing in upwelling intensity as greenhouse gases have accumulated in the earth's atmosphere. Thus the cool foggy summer conditions that typify the coastlands of northern California and other similar upwelling regions might, under global warming, become even more pronounced. Effects of enhanced upwelling on the marine ecosystem are uncertain but potentially dramatic.
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              Warming of the World Ocean

              S Levitus (2000)
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                Author and article information

                Journal
                Journal of Geophysical Research: Oceans
                J. Geophys. Res. Oceans
                Wiley
                21699275
                March 2015
                March 2015
                March 05 2015
                : 120
                : 3
                : 1446-1461
                Affiliations
                [1 ]Pacific Marine Environmental Laboratory; National Oceanic and Atmospheric Administration; Seattle Washington USA
                [2 ]Ocean Acidification Research Center, School of Fisheries and Ocean Sciences, University of Alaska Fairbanks; Fairbanks Alaska USA
                [3 ]College of Earth, Ocean, and Atmospheric Sciences; Corvallis Oregon USA
                [4 ]Institute for Marine and Antarctic Studies, University of Tasmania; Hobart Tasmania Australia
                Article
                10.1002/2014JC010580
                dcdf5fbc-e464-4d81-8050-8938eac59622
                © 2015

                http://doi.wiley.com/10.1002/tdm_license_1.1

                http://onlinelibrary.wiley.com/termsAndConditions#vor

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