The rise in the level of green house gas in the earth atmosphere, causes the rise in average temperature of Earth climate system.
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| image credit : wikipedia |
Scientists have predicted the impact of the global warming on sea level, it is predicted that the sea level will rise by 1.3 by the year 2100. And 3 metres by the end of year 2300. And the study of data from satellites shows that sea level has risen 8 to 10 inches in the past centuries. Although the sea level variation is also influenced by oceanographic process like El nino etc. Global sea level is currently rising at 3–4 mm/year, making it a relatively slow process. For instance, tides typically change sea level by 0.5-1.0 m every 12 hours, a rate that is 100,000 times faster than global mean sea level rise. Rising seas has also been tied to an increased risk from tsunamis, potentially affecting coastal cities in the Pacific and Atlantic Oceans. One of the areas in danger is Venice. The city is located in the delta of the Po and Piave rivers on the islands. Sea level rise causes an increase in frequency and magnitude of flooding in the city that already spent more than 6 billion$ on the flood barrier system. While some special measures have been taken in coastal areas to deal with the effects of storm surges, not much has been done to deal with the increased storm surges caused by rising sea levels.
Future sea level rise could lead to potentially catastrophic difficulties for shore-based communities in the next centuries: for example, millions of people will be affected in cities such as Miami, Rio de Janeiro, Osaka and Shanghai if following the current trajectory of 3 °C . The Egyptian city Alexandria faces a similar situation, where hundreds of thousands of people living in the low-lying areas may already have to be relocated in the coming decade. However, modest increases in sea level are likely to be offset when cities adapt by constructing sea walls or through relocating. Miami has been listed as "the number-one most vulnerable city worldwide" in terms of potential damage to property from storm-related flooding and sea-level rise. Storm surge will be one of the important disasters caused by sea level rise in the future that can cause the largest loss of life and property in the world's coastal areas. Storm surges have been affected in recent years by rising sea levels, which have increased in frequency and intensity. For example, one of the most severely affected areas is New York City, where study simulations show that the impact of sea level rise on the New York area will be reduced from 100-year flooding to 19-68 years by 2050 and 40-60 years by 2080.
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| image credit : wikipedia |
By the year of 2300, the icebergs of green land and Antartica will melt this causes the rise in sea level by 5 metres.
The sad news is nearly 10% of human population live in coastal areas ie at the sea level and they are in real danger.
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