Tiivistelmä.

The ocean has absorbed a significant portion of all human-made carbon dioxide emissions. This benefits human society by moderating the rate of climate change, but also causes unprecedented changes to ocean chemistry. Carbon dioxide taken up by the ocean decreases the pH of the water and leads to a suite of chemical changes collectively known as ocean acidification. The long term consequences of ocean acidification are not known, but are expected to result in changes to many ecosystems and the services they provide to society. Ocean Acidification: A National Strategy to Meet the Challenges of a Changing Ocean reviews the current state of knowledge, explores gaps in understanding, and identifies several key findings. Like climate change, ocean acidification is a growing global problem that will intensify with continued CO2 emissions and has the potential to change marine ecosystems and affect benefits to society. The federal government has taken positive initial steps by developing a national ocean acidification program, but more information is needed to fully understand and address the threat that ocean acidification may pose to marine ecosystems and the services they provide. In addition, a global observation network of chemical and biological sensors is needed to monitor changes in ocean conditions attributable to acidification.

This title was first published in 2002: The adoption of the 1999 Gothenburg Protocol within the Convention on Long-Range Transboundary Air Pollution (CLRTAP) and the 2001 EU National Emission Ceilings (NEC) directive has made for much stronger European air pollution policies. This volume offers the first in-depth analysis available of this key development. Central questions discussed include: -What role did the three new Green member states joining the EU in 1995 play in this development? -Will these significantly stronger policies only be followed by weaker implementation? -Why are the EU emission ceilings more ambitious than those of CLRTAP? -Do these more ambitious EU NEC emission ceilings and wider trends such as EU enlargement signal that CLRTAP is fading away as a central forum for European policy development? Decision makers, negotiators and international and non-governmental organizations will benefit from this book as it discusses important institutional issues. Students and academics will also find it extremely useful.

Following the first international workshop on the economics of ocean acidification organized by the Centre Scientifique de Monaco and the International Atomic Energy Agency in 2010, a second international workshop was held in November 2012, which explored the level of risk, and the resilience or vulnerability of defined regions of the world ocean in terms of fishery and aquaculture species and economic impacts, and social adaptation. This report includes the findings and recommendations of the respective regional working groups and is the result of an interdisciplinary survey of ocean acidification-sensitive fisheries and aquaculture.