Thursday, May 22, 2003
Scripps Professor Reveals Impacts of Global Warming on Coastline
Scripps Institution of Oceanography / University of California, San DiegoScripps Professor Reveals Impacts of Global Warming on Coastline
Professor Doug Inman, founding director of the Center for Coastal Studies at Scripps Institution of Oceanography, UCSD, recently made the first public presentation of data from a new project to model the effects of global warming on the southern California coastline. The presentation was made at a private fundraiser for the California League of Conservation Voters.
"California's beaches face a critical imbalance as global warming threatens to increase the rate of sea level rise," said Inman. "Southern California's beaches today are ephemeral rivers of sand backed by sea cliffs. Due to dams, seawalls, roadways, and coastal development, the available sand for San Diego County's beaches is less than half the supply under natural conditions. Following winter storms, cobbles and rocky platforms are exposed, and the sand beach may only partially recover during the low waves of summer. In the absence of wide beaches, waves attack the base of the sea cliffs. Studies show that 86 percent of California's coast is actively eroding."
Climatologists warn that global sea level may rise by half a meter or more by the end of the century, further reducing beach width and increasing coastal erosion. Scientists at Scripps Institution of Oceanography, in collaboration with the Kavli Institute (a private foundation in Oxnard, Calif.), are projecting the fate of the southern California coast over the next 200 years.
Led by Professor Inman, the team is modeling coastal processes-wave climate (prevailing, inter-seasonal wave conditions averaged over a number of years), sediment supply, and bedrock erosion-and developing a 3-D visualization of the coast using future climate scenarios. The team, which includes associate researcher Patricia Masters, intends their interactive model to provide planners and policy-makers with the sound science to inform decisions and allocate resources in ways that can benefit the coast.
According to Inman, "Our west coast is at the pivot point of either retaining sandy beaches or losing this precious natural resource."
The California League of Conservation Voters is the non-partisan political action arm of California's environmental movement. It is the nation's oldest and largest state political action committee for the environment. For 30 years, CLCV's mission has been to protect the environmental quality of the State by working to elect responsible candidates to office, then holding them accountable to their environmental agendas.
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Scripps Institution of Oceanography, at University of California, San Diego, is one of the oldest, largest and most important centers for global science research and education in the world. The National Research Council has ranked Scripps first in faculty quality among oceanography programs nationwide Now in its second century of discovery, the scientific scope of the institution has grown to include biological, physical, chemical, geological, geophysical and atmospheric studies of the earth as a system. Hundreds of research programs covering a wide range of scientific areas are under way today in 65 countries. The institution has a staff of about 1,300, and annual expenditures of approximately $155 million from federal, state and private sources. Scripps operates one of the largest U.S. academic fleets with four oceanographic research ships and one research platform for worldwide exploration.
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