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
A floating shelf of ice attached to the coast of Antarctica appears ready to shed an iceberg into the Southern Ocean. Over the course of two years, a small crack grew large enough to spread across nearly the entire width of the Nansen Ice Shelf.
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Since the arrival of El Niño in November, sea levels have risen 20 cm to become a surrogate for the next 250 years of climate change, giving scientists the prime opportunity to study future erosion of the Santa Barbara coastline.
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From Shanghai and Mumbai to New York and Buenos Aires, even a few feet of sea level rise threatens to flood homes and highways, inundate sewage treatment plants, and contaminate drinking water. Landscape architect Kristina Hill argues that cities need to start planning now for impacts that will happen 50 or 100 years in the future.
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Every few years, caravans of yellow trucks move thousands of tons of sand from the north end of San Francisco’s Ocean Beach to eroded areas at the south end. And almost immediately, the silvery tide begins carrying it back to where it came from.
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The Union Government cannot just look at Zanzibar sinking without providing help, said officials after a short tour to areas affected by erosion caused by the sea rise. Negative impacts of climate change in the Islands are real, and aggravated by people’s unnecessary cutting down of trees, and illegal mining to get sand and stones as building materials.
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Scientists have modeled a history of the planet’s sea levels spanning back 3,000 years, and concluded that the rate of increase last century “was extremely likely faster than during any of the 27 previous centuries.”
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Topics like climate change and sea-level rise are not only reserved for government and university research. The Virginia Museum of Contemporary Art and local museums, are joining the conversation.
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New measurements from a NASA satellite have allowed researchers to identify and quantify, for the first time, how climate-driven increases of liquid water storage on land have temporarily slowed the rate of sea level rise by about 20 percent.
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Huge sea-level rises caused by climate change will last far longer than the entire history of human civilisation to date, according to new research, unless the brief window of opportunity of the next few decades is used to cut carbon emissions drastically.
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