www.seaweb.org 6th July 2011
In the absence of a global move to reduce carbon emissions, many have asked the question whether anything can really be done to reduce the effects of ocean acidification on the marine environment. A new paper, released in the journal Science, has tried to tackle this question by putting forward a number of ideas that could be implemented by local and national governments to better protect their coastlines. Although the growing amount of CO2 in our atmosphere is increasing the level of the gas absorbed by the oceans (thereby creating carbonic acid), several other factors also play a role in this process. Freshwater input from rivers, pollution, and soil erosion all affect the acidic level of seawater. Although the report, headed by Ryan Kelly of the Center for Ocean Solutions at Stanford University, is aimed towards the United States, it’s lessons are relevant on a global scale. The first issue they tackle is to reduce acidification-related runoff. This can be done by using state funding and the Clean Water Act to prevent stormwater surges, upgrade water treatment facilities, and restore wetland areas. Secondly, in order to reduce coastal erosion (which carries with nutrient runoff and acidification-inducing fertilisers) local governing bodies should encourage vegetation growth that stabilises coastal sediment. Thirdly, “enforcement of federal emissions requirements for such industrial pollutants as nitrogen oxide and sulfur oxide should provide local benefits given these pollutants’ short atmospheric resident times.” The paper insists that these more local moves challenge the commonly held belief that the problem of ocean acidification can only be dealt with on a national scale.
