Sea Level Rise
There will always be beaches, but sea level rise will ensure that they will not be in the same place in the future. The beaches will still exist throughout this change, but many of the buildings may not. Efforts to save development, however do threaten beaches, such as shoreline armoring structures.
Although relative amounts of rise may seem very small, only a few millimeters per year, the cumulative effect of these small rises each year over a long period of time (100+ years) causes major problems. Accelerated rates of erosion are attributed to sea level rise and erosion causes large economic losses around the world each year due to the close proximity of buildings and critical infrastructure. This includes transportation systems, gas and oil lines as well as electricity lines and power plants.
Most developed coasts and beaches have buildings very close to the ocean leaving little room for the ever-expanding ocean. The future effects of sea level rise on coastal civilization over the entire world are of great concern. Over half of the world’s population lives within 100 km of the coast. Over the next 50 years, damage due to coastal development will be devastating, but if the rate of sea level rise increases, the results could be catastrophic. This issue threatens areas from New York City in the United States to the Pearl River Delta in China to the Maldives.
The world map below allows you to see elevations of coastal areas. Areas in red are the lowest in elevation and are most prone to flooding. Check out Manhattan in New York City. If you think the situation there looks dire, be sure to check out the effects of a 2 m rise in sea level on Pearl River Delta in China, home to more than 40 million people. Map courtesy of globalwarmingart.com
Surfing in / Sea Level Rise
Sea-level rise has been isolated as a principal cause of coastal erosion in Hawaii.
Pacific islanders will challenge world leaders this week to act on climate change, warning that their low-lying atolls are close to becoming uninhabitable because of rising seas and increasingly severe floods, droughts and storm surges.
An international panel of scientists has found with near certainty that human activity is the cause of most of the temperature increases of recent decades, and warns that sea levels could conceivably rise by more than three feet by the end of the century if emissions continue at a runaway pace.
Climate change combined with rapid population increases, economic growth and land subsidence could lead to a more than nine-fold increase in the global risk of floods in large port cities between now and 2050.
Eighty-four coastal and social scientists from 12 countries gathered for presentations aimed at synthesizing knowledge of the causes and impacts of sea-level rise, severe storms and other influences on coastal regions and to engage in discussion on how science can and should inform the public and policymakers about the realities of sea-level rise and coastal change.
Because of carbon emissions that are virtually certain, on the basis of the lack of policy-response to global warming thus far, sea levels are now set to rise anywhere from around 8 inches to 7 feet within 100 years, and around 5 yards to 10 yards within 2,000 years.
A recent slowdown in the upward march of global temperatures is likely to be the result of the slow warming of the deep oceans…
Coastal forests, coral reefs, sand dunes, marshes and wetlands are just a few of the natural habitats that protect two-thirds of the US coastline from hazards such as hurricane, and are key to protecting lives and property against storm surges and long-term sea-level rise.
Seas will remain high for centuries after temperatures have risen, with the likelihood of more frequent and damaging storms…