Showing posts with label sea levels. Show all posts
Showing posts with label sea levels. Show all posts

Bangladesh makes a controversial decision to turn use coal to produce electricity, but this large coal-fired power plant is threatening the ecosystem of the Sundarbans, which is the world’s largest mangrove forest. In October, Bangladeshi and Indian officials were supposed to hold a ceremony which was to lay the foundations for the Rampal power plant, which is the new coal-fired project that will be situated on the edge of the Sundarbans. However, instead, the governments cancelled the ceremony entirely and announced that the project had already begun. While the governments say that the change was due to busy schedules, activists say the sudden scuttling of the ceremony was most likely due to rising pressures against the coal plant. One such bid was a five-day march in September which attracted the interest of an estimated 20,000 people. Opponents to the plant say that the 1320 megawatt project could completely destroy the Sundarbans, which is the nation’s stronghold of the Bengal tiger. They further contend that the water diversion to the plant, along with the air and water pollution and heavy coal barge traffic, could leave the Sundarbans an increasingly degraded ecosystem. Most of the impact on the plant and wildlife would be negative and irreversible.


 


 


The government claims that the plant will produce much needed power for Bangladesh, with around half of its 150 million people currently lack electricity. Officials state that Rampal will also cause minimal damage to the environment, with the Sundarbans their safeguard against natural disasters. Therefore no damage will occur to them. The construction of this plant is the beginning of an ambitious strategy by the government to increase the generation of electricity to 20,000 by 2021. This goal relies heavily on coal, with the Prime Minister proposing a dozen of new coal plants yet to come. Critics of this plant and the growing embrace of coal that the country has developed argue that the reckless strategy shows little thought to the environment. Few nations are as low-lying as Bangladesh and the Sundarbans is one of the most important protectors against rising sea levels and intense typhoons. Based on the projections of sea levels from the Intergovernmental Panel on Climate Change, 17 per cent of Bangladesh could be swamped by sea waters, creating millions of climate refugees. With Bangladesh already being a global hotspot for cyclones and extreme tropical weather disasters, this only serves to heighten the risk and put millions of lives in danger.


 


 


Coal is a big business in India and there is no doubt as to the interests at play for the country. There is significant profit to be made for many companies if this plan goes ahead. Like the Rampal coal plant, the mangrove forest at risk is shared between Bangladesh and India. Around 80 per cent of the forest lies within Bangladesh, and the rest is in Bengal. This vast forest covers as much as 10,000 square kilometres and is a vital resource to locals who depend on its fisheries and natural produce, much as they have done for centuries. The Sundarbans play a vital role in the national economy and is the largest source of forest products in the country. It is home to around 210 species of fish, 49 mammals, 330 plants and 59 reptile species – all of these would be left endangered and homeless if the mangrove were to be damaged by the plant. As with many other global warming issues, this is something that requires far more thinking as to the damage it will cause not just to the environment but to Bangladeshi people.

Although the most recent U.N climate report significantly increased its projections for the sea level rise for this century, some scientists warn that even those estimates are extremely conservative. The only thing we know for certain is that predicting sea level rise for the future is an incredibly difficult task. When the scientists on the Intergovernmental Panel on Climate Change (IPCC) met to discuss the sea level rise for this report, they found it a far harder task that initially anticipated. Sea level forecasts were arguably the most controversial part of the previous report, issued in 2007, and scientists and the public alike have found the estimate of under 60 centimetres to be incredibly low, which doesn’t even include the possibility of rapid ice flow from Greenland or the Antarctic into the sea. These two ice sheets hold the ability to raise sea levels by an astonishing 65 metres, compared to just 0.4 metres in all of the world’s mountain glaciers. Because such things have been neglected, we can’t determine an accurate projection from the figures released.


However, things today look slightly more certain. In the latest report, the IPCC said they could finally put a number on the ice flow from the poles. The result of the estimate was the belief that the sea level rise would be in the region of 28 to 98 centimetres, with a maximum of more than three feet, by 2100  over 50 per cent higher than the 2007 projections. However, this doesn’t mean that sea level rise problems are now fully understood. In fact, far from it – scientists are still battling big questions surrounding the fate of the ice sheets and this could greatly increase the recent projections by a vast majority. Researchers still don’t know how quickly these predictions will become a reality, and there are many more smaller factors still being contended with.


 


The oceans don’t rise steadily like water being poured into a bathtub; instead there are splashes and movements as it rises. Patterns in the weather, such as with El Nino can shove tens of centimetres of water onto the shores of countries at a time, much like they did in California in 1998. Take the floods in 2010 in Australia as an example. And with the ocean growing, the land also shifts. The ground rises where it was once pressed down by glaciers, and then the river deltas sink as the sediments compact. So what looks like the sea levels rising on first glance may actually be the result of the land falling. Unravelling what the oceans are doing currently is a difficult thing to do, and predicting their behaviour is even harder. Everyone is committed to sea level rise, but no-one knows exactly what that means or when it’s likely to happen. Whichever way we look at this issue, the results of the studies are cause for concern. Scientists are even suggesting that people who live under three feet sea level, they should be concerned for the next 100 years.


 


People are able to adapt to a certain extent but we have a difficulty in the fact that people aren’t planning for the reality. There need to be many changes to the way people live in order to cut their carbon footprint drastically in order to lower the increasing risk of sea levels rising, and other environmental effects of global warming. When people make these changes, researchers can begin to look into the ways we can adapt our lifestyles accordingly.