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Climate change

8,778 bytes added, 17 January
{{wikipediatopic header| default.png |Climate change}}'''Global warmingClimate change'''{{W|Climate change}} is a significant and lasting change in the Earth' refers to s climate over an extended period. In this article we discuss the increase impact of a rise in the average temperature of the Earth's near-surface air atmosphere and oceans in recent decades and its projected continuationfrom the 19th century to the present. <ref>http://en.wikipedia. Global warming org/wiki/Global_warming</ref> Climate change is accepted as the scientific consensusexpected to have far greater negative effects on [[developing countries]] than on developed countries due to numerous factors including exposure to extreme weather and infrastructure considerations.
== The global average air temperature near the Earth's surface rose 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the last 100 years. The Intergovernmental Panel on Climate Change (IPCC) concludes, "most science of climate change =={{main|Science of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations"[http://en.wikipedia.org/wiki/Global_warming#_note-grida7] via the [[greenhouse effect]].climate change}}
==Contrarian views==Although the existence of the greenhouse effect has been largely understood since 1896<ref>[http://en.wikipedia.org/wiki/Svante_Arrhenius#Greenhouse_effect]</ref>, there are still a tiny minority of scientists who remain critical of specifics written in some reports of the IPCC{{w|Intergovernmental Panel on Climate Change}} and other organisations. These so-called climate change skeptics{{WPw|Climate change skeptics}} are a very small generally misinformed or are deliberately attempting to create doubt and decreasing minority of scientists uncertainty about the science. Certain politicians, lobbyists and a relatively large number of economists. This refer to disinformation from climate change 'skeptics' for their own advantage, portraying an image that climate change does not require proving it beyond doubt: consider exist, poses but a minor problem, or may even be beneficial so as to be able to prevent action to reduce greenhouse gases (mostly resulting from the practice burning of the insurance industry to plan for outcomes of varying degrees of likelihoodfossil fuels). As The GWPF in the scientific consensus is that there UK is an example of a very strong probability (the IPCC says 90%{{fact}}) that humans are causing significant climate changepolitical lobbying group, it which is vital to prepare for itsecretly funded by fossil fuel interests.[http://www.theguardian. com/environment/climate-consensus-97-per-cent/2014/oct/08/gwpf-funder-leach-relying-on-unreliable-sources-of-info Guardian article on the secret funding of the GWPF]
There is less agreement over the best solutions. For example, the role == The impact of climate change ==[[nuclear energyFile:Natural disasters caused by climate change.png|thumb|right|200px|Natural disasters caused or aggravated by global warming]] and the relative importance of Although climate change itself has been proven, uncertainties still exist regarding predicting the effects. The IPCC is highly confident that impacts will increase as opposed greenhouse gases and associated positive feedback effects kick in (e.g. methane release from melting permafrost, changing albedo), though their severity and the timescales may differ to directly addressing poverty are open to debatesome extent.<ref>{{WP|Bjorn Lomborg}}</ref>Examples of impacts include:
Critical analysis * Increasing heat stresses as global temperatures rise. While some regions such as Canada may benefit to some degree from rising temperatures, the overall effects on the ability of technologies the planet to support life will be negative. As temperatures rise, many equatorial regions will become hostile to life;* Changing weather patterns, especially more extreme weather events and changing rainfall patterns, specifically increasing or decreasing precipitation levels. Increasing floods and strategies drought periods will have a generally negative effect on [[farming]]<ref>www.knmi.nl/africa_scenarios/brochure_Afrika.pdf</ref><ref>http://earthobservatory.nasa.gov/Features/Water/images/precipitation_intensity_map.png Precipitation changes</ref><ref>http://climatelab.org/@api/deki/files/462/=Desertification_map.png</ref><ref>One solution is to grow more resilient crops, i.e. more resistant to changes in rainfall and disease</ref>;* Natural disasters (ie mud slides, hurricanes, ...) are importantexpected to increase in their severity. Death toll in 2003 = 150,000 people <ref>[http://www.wired.com/science/discoveries/news/2003/12/61562 150000 people killed by global warming up to 2003]</ref><ref>http://climatelab.org/climate_change_security</ref>:* Sea level rise<ref>Sea level rise: 2m rise expected by the year 2100, 6.5m by 2200</ref> will contaminate a very large percentage of the planets' agricultural fields with sea salt and make them no longer suitable for continued food production.<ref>Earth under water documentary</ref> In addition, many low-lying islands and coastlines will need to be abandoned, though forcing many people to move.* Increasing ocean acidity. As the pH of course each side water decreases due to the input of an argument can carbonic acid (resulting from CO2 dissolving in water), life forms which rely on a chalk shell will find it increasingly impossible to survive. This will have its own biasnegative effects on many ocean ecosystems, especially coral reefs which are the most bio-diverse of any ecosystem on the planet.
Such contrarian viewpoints and critical analysis can be found at:*[http://www.reason.org/airquality/index.shtml The Reason Foundation]==Historic changes in the earth's climate==
The term "climate change" is often used to describe the impact of human-caused pollution on the earth's climate, but is important to understand that climate change is also caused by natural phenomena. History of Ice Ages The earth'Notes climate is subject to large fluctuations. The climate is dominated by ices ages<ref>http: this //en.wikipedia.org/wiki/Timeline_of_glaciation</ref>, which reduce the earth's surface temperature and cover large parts of the surface in ice sheets. There have only been five ice ages to date, that have lasted from 30 million up to 300 million years. The most recent one occurred during to "Quaternary", which started about 2.5 million years ago and is still lasting. In between ice ages, the poles are not an endorsement covered by glaciers and the temperature is higher. The climate is quite stable in these periods, however during ice ages strong variations occur. These variations are called glacial (cold) and interglacial (hot) periods<ref>http://en.wikipedia.org/wiki/Timeline_of_glaciation</ref>. Glacial and interglacial periods alternate every 5,000-15,000 years. The current interglacial period started 14,000 years ago. == Climate change mitigation =={{main|Measures to stop global warming}} Several options are available to reduce the impacts of a changing climate. Most of arguments found at these websites(the most efficient ones) are lifestyle changes (i.e. stop the burning of fossil fuels, stop eating meat etc.) and can be put in place today. We also do not need to wait for any specific technology to became available. HoweverRather, if the essential technology is already here today. Politicians often portray a site different picture but it is assessed rarely based in depth reality. Selected options include: * Reducing the release of greenhouse gases{{W|Greenhouse gas}} (GHG's) into the atmosphere (ie through energy efficiency, ...)* Prevent carbon dioxide from being released into the atmosphere (ie through carbon capture and found to be seriously inaccurate storage (CCS), [[biochar]], ...). With [[Carbon sequestration]]/CCS, after combusting a fuel, the CO<sub>2</sub> is stored in a cavity underground.* Remove carbon dioxide from the atmosphere, e.g. through geo-engineering [[ocean fertilisation]], planting extra [[trees]], ...* Shield some of the planet from the sun, or reflect a proportion of sunlight back into space (i.e. by painting roads, parking spaces and misleading[[White roofs|roofs]] white, spraying sulphate aerosols into the stratosphere, it should be removed ...)<ref>Note: this direct temperature reduction does not reduce carbon levels, so [[ocean acidification]] from this pagehigher carbon dioxide is still a problem</ref>* [[Climate change mitigation]]: build [[heat tolerant houses]] ([[passive solar]] with suitable [[insulation]]), [[flood control]] barriers, ...* Grin and bear it: put up with the inconveniences and the reasons given on expected loss of biodiversity and increases in certain types of [[natural disasters]] and wait for extinction. The IPCC already considers a 2°C temperature rise to be almost inevitable. In addition, it also advises the use of most other measures, yet stays critical of [[Category talk:{{PAGENAME}}|talk pagegeoengineering]] (where options, due to the risks involved. == Climate change chain reactions == The change in temperature and weather has a huge impact on wildlife which can become dangerous if the change stays the same.Even the minor change of temperature can lead to earlier hatching of insects or melting of snow which protects snow rabbits from their natural hunters.These effects cause problems like insect overpopulation or too less surviving rabbits to reproduce sustainably.The insects are dangerous because they consume crops and other plans and in huge amounts they are even able to consume a whole field of possible food.Because this problem is getting bigger and even endangers species and if it goes on like this many species will die out and even our own food capacity may shrink exponentionally. == Climate Change on the Ocean == Earth is called the blue planet because approximately 72 percent of it is covered by oceans. The oceans influence the decision weather on local to global scales, while changes in climate can be noted fundamentally alter many properties of the oceans. === Ocean conveyor system === The thermohaline circulation also called the great ocean conveyor belt or global ocean conveyor belt, is a large scale ocean circulation that distributes vast quantities of heat and moisture around on a planetary scale. === Gulf stream === Gulf stream has the length of 10.000 km. It is one of the largest and reviewed fastest ocean current on earth. Originating from the tip of Florida, at 2 <sup>m</sup>/<sub>s</sub>, it brings 100.000.000 <sup>m<sup>3</sup></sup>/<sub>s</sub> water towards Europe. === Sea level rise === As water gets warmer, it takes up more space. Each drop of water only expands by a little bit, but when you multiply this expansion over the entire depth of the Appropedia community)ocean, it all adds up and causes sea level to rise.But that''s not the only cause of the rise of sea level. The rise of sea level also caused by the melting of glaciers and polar ice caps and ice loss from Greenland and West Antarctica. === Ocean acidification === Ocean acidification is the ongoing decrease on ocean pH cause by human CO<sub>2</sub> Emission.Ocean pH has decreased by about 30% already and if we continue emitting CO2 at the same rate by 2100 ocean acidity will increase by about 150%, a rate that has not been experienced for at least 400,000 years. Such a monumental alteration in basic ocean chemistry is likely to have wide implications for ocean life, especially for those organisms that require calcium carbonate to build shells or skeletons. == Impact of climate change on species == Through rising temperatures resulting in a shift of climate zones forces species to adapt to the new climatic conditions. By a rapidly increased temperature the risk for especially plants not to find areas with suitable living conditions early enough is higher. Observations of several species conclude that they are moving their ranges polewards to keep up with changing climate.  ==Notes==<small><references/></small>
==See also==
*[[Renewable energy]]
*[[Incentives for sustainability]]
*[[Sea level rise]]
*[[Measures to stop global warming]]
== Interwiki links ==
* [[Wikipedia:Climate change]]* [[Wikipedia:Category:Action on climate change]] ==NotesExternal Links ==<small><references[http://www.skepticalscience.com/ Skeptical Science][http://en.wikipedia.org/><wiki/small>Timeline_of_glaciation]
[[Category:Air pollution]]
[[Category:Climate change]]

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