climate

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climate change

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Climate change

What is climate? -The weather conditions prevailing in an area in general or over a long period. -A region with particular prevailing weather conditions. How has our climate changed?

This is a shift in the Earth's climate between glacial ages, when global temperature drops and large areas of planet get covered in snow and ice, and interglacial ages, which brings the less cold conditions, such as those most of us we experience now.

There's evidence to show these cycles are triggered by small changes in the Earth's orbit that affect the amount of energy the planet gets from the sun. It takes about 20,000 years for the change from one age to another to take place, with the global temperature change between each being about 4 °C. The full cycle, from glacial age to glacial age, takes about 100,000 years. Evidence suggests the last ice-age ended about 11,000 years ago. How will it affect us in the future? If the climate continues changed and global warming playing a huge factor in this change will mean the world will continue to get hotter and cause a large change in weather patterns. For example where it is colder it may become warmer along with a rise in the water level flooding countries around the world.

Big Picture I think that yes scientific evidence proves that the world is getting warmer from looking at rising sea levels, disappearing glaciers along with changing sea seasons and shifting wildlife. The world’s most respected scientists say that there is evidence that the human race play a large role in the warming of the earth. The target for solving climate change varies, but however mainly focus on temperature, concentrations and trajectories. The planet can get much warmer than it already is but it depends on the future of emissions and the sensitivity of the climate.

Technology:

We need low carbon energy as it decrease human consumption of emissions it currently accounts for a small percentage of total global consumption. Capture and carbon storage involves buy and capturing carbon to avoid it entering our atmosphere, the main types of capturing carbon include pre-combustion, post-combustion and finally oxyfuel. Thorium is a radioactive element that could be used to generate large amounts of low carbon electricity in future decades. Biofuels and bioenergy are natural components of the earth ie wood grasses and crop; could all generate large amounts of energy however there are concerns about the impact using them would have on food production. Geo engineering aims to cool the earth by removing co2 from the earth or limiting sunlight reaching the planet. Impacts: Sea levels rising may have an impact on large cities such as New York and London however not immediately if emission continues to rise many of the worlds largest and most densely populated cities maybe under water within the next few decades. Climate change may cause wars, it is impossible to say a definite answer but the connection between warming and warfare is becoming complex. However climate change might also have a few positive outcomes but there is more negative than positive impacts. Simulators suggest that there maybe be fewer hurricanes with climate change but they will be stronger the same also goes for tornadoes and tsunamis.

Politics: The emissions from different nations can be ranked in different ways all coming out with fairly different results. The stern review is an influential report that set out to examine economic impacts of climate change, the economic cost of climate change cannot be predict any certain long term impacts both positive and negative. The IPPCIntergovernmental panel of climate change, a UN body which looks and evaluates climate change. ETS-Europe’s emission trading system which has been beset by problems. Emisiion trading is market based approach to try and reduce pollution.

-The Stern review is an influential report that set out to examine the economic impacts of climate change -Uunartoq Qeqertaq, -is an island, that was only acknowledged as such in September 2005, by an American explorer Dennis Schmitt, off the east central coast of Greenland, 550 km (340 mi) north of the Arctic Circle. It was attached to the mainland of Liverpool Land by glacial ice even in 2002, when the ice shelves began retreating rapidly in this area, so that by 2005 it was no longer attached to the mainland. Members of the scientific community believe this newly discovered island is a direct result of global warming.

Efficiency Deficiency: There is a great need for energy efficiency in Britain as much of the housing stock is old and insufficiently insulated. The UK Green Building Council estimates that buildings are responsible for 44 per cent of the country's carbon dioxide emissions. Energy often seeps out of roofs and windows and is wasted in old equipment such as washing machines. If UK homes were properly insulated carbon emissions would drop by 3.8 million tonnes. The warmest year on record would be1998, with a temperature of 0.55°C above the 1961-90 mean. After 1998, the next nine warmest years in the series are all in the decade 20012010. During this decade, only 2008 is not in the ten warmest years. Even though 2008 was the coldest year of the 21st century it was still the 13th warmest year of the whole record. -Humans may be the main reason that climate change is happening with all the CO2 emissions we produce as a whole planet warming the sun , however According to the scientific literature, however, the warming recorded to date matches the pattern of warming we would expect from a build-up of greenhouse gas in the atmosphere – not the warming we would expect from other possible causes.

-Scientists are exploring whether global warming might slow or shut it down - a scenario considered "low probability, high impact". This could disrupt mostly wind-driven surface currents such as the Gulf Stream, which helps to bring milder weather to Northern Europe.

http://www.guardian.co.uk/commentisfree/ 1 Surface currents carry warm, salty water from the tropics. 2008/jul/01/climatechange.carbonemissions 2 The water cools, its density increases and it sinks to the deep ocean. 3 The cold water flows back to the equator, driving the "ocean conveyor" which in turn contributes to the Gulf What Europe. Stream that warmsnorthern is meant by ‘green squeeze’? 4 As ice melts, freshwater dilutes the warm salty water from the tropics. 5 The water becomes less dense so does not sink as fast, weakening the "conveyor" and therefore possibly disrupting the Gulf Stream.

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