January 29, 2013
Climate Change Impacts Will Threaten Economy, Public Health
April Flowers for redOrbit.com - Your Universe Online
A leading group of scientists and experts from the United States Geological Survey (USGS) and the National Oceanic and Atmospheric Administration (NOAA) recently released a report that emphasizes the need for increased coordination and planning to ensure U.S. coastal communities are resilient against the effects of climate change.
"Sandy showed us that coastal states and communities need effective strategies, tools and resources to conserve, protect, and restore coastal habitats and economies at risk from current environmental stresses and a changing climate," said Margaret A. Davidson of NOAA's Office of Ocean and Coastal Resource Management. "Easing the existing pressures on coastal environments to improve their resiliency is an essential method of coping with the adverse effects of climate change."
The report found that all U.S. coasts are highly vulnerable to the effects of climate change such as sea-level rise, erosion, storms and flooding — especially in the more populated low-lying parts of the U.S. coast along the Gulf of Mexico, Mid-Atlantic, northern Alaska, Hawaii, and island territories. The financial risks associated with both private and public hazard insurance are expected to increase dramatically, the report claims.
"An increase in the intensity of extreme weather events such as storms like Sandy and Katrina, coupled with sea-level rise and the effects of increased human development along the coasts, could affect the sustainability of many existing coastal communities and natural resources," said Virginia Burkett of the USGS.
Storm surge flooding and sea-level rise pose significant threats to public and private infrastructure that provides energy, sewage treatment, clean water and transportation of people and goods, the report emphasizes, as these factors increase threats to public health, safety and employment in the coastal regions.
More than 50 percent of the nation's population and more than $8.3 trillion of the U.S. economy in 2011 came from the population of the coastal watershed counties of the U.S. and territories, including the Great Lakes. These areas, however, depend on healthy coastal landforms, water resources, estuaries and other natural resources to sustain them. Human development activities combined with climate change reduce the ability of coasts to provide benefits, including food, clean water, jobs, recreation and protection of communities against storms.
Seventy-nine experts and scientists participated in the study, which is being used as a technical input to the third National Climate Assessment. The National Climate Assessment is an inter-agency report produced for Congress every four years to summarize the science and impacts of climate change on the nation.
The report also finds:
* Expected public health impacts include a decline in seafood quality, shifts in disease patterns and increases in rates of heat-related morbidity.
* Changes in the location and the time of year when storms form can lead to large changes in where storms land and the impacts of storms. Any sea-level rise is virtually certain to exacerbate storm-surge and flooding related hazards.
* Because of changes in the hydrological cycle due to warming, precipitation events (rain, snow) will likely be heavier. Combined with sea-level rise and storm surge, this will increase flooding severity in some coastal areas, particularly in the Northeast.
* Temperature is primarily driving environmental change in the Alaskan coastal zone. Sea ice and permafrost make northern regions particularly susceptible to temperature change. For example, an increase of two degrees Celsius during the summer could basically transform much of Alaska from frozen to unfrozen, with extensive implications.
* As the physical environment changes, the range of a particular ecosystem will expand, contract or migrate in response. The combined influence of many stresses can cause unexpected ecological changes if species, populations or ecosystems are pushed beyond a tipping point.
* Although adaptation planning activities in the coastal zone are increasing, they generally occur in an ad-hoc manner and are slow to be implemented. Efficiency of adaptation can be improved through more accurate and timely scientific information, tools, and resources, and by integrating adaptation plans into overall land use planning as well as ocean and coastal management.
* An integrated scientific program will reduce uncertainty about the best ways coastal communities can to respond to sea-level rise and other kinds of coastal change. This, in turn, will allow communities to better assess their vulnerability and to identify and implement appropriate adaptation and preparedness options.
A copy of the report can be downloaded here.