climate change theory pdf free

Climate Change Theory Pdf Free -

Climate Change Theory Pdf Free

Title:Climate Change Description: Climate Change Introduction Climate is always changingBut aside from that it's freeScience29Carbon Dioxide (CO2)Greenhouse gas that strongly absorbs infrared radiation Plays major role in warming lower atmosphere Increasing steadily in atmosphere Burning of fossil fuels Deforestation burning and replaced with less efficient plans Estimates Annual average - 355 parts per million in 1993 Forecasted to double within next century Climate model experiments predict that doubling CO2 will result in a global warming of surface air temperature between about 1.5? and 4.5?C over next 50 yearsBibcode:2001Sci.292.667DWhen urban warming taken into account and improved SST information incorporated into data, warming over past 100 years measures between 0.3-0.6?CThree to four billion years ago, the Sun emitted only 70% as much power as it does todayNSFRetrieved 21 July 2009

But orbital changes alone are probably not totally responsible for ice buildup and retreatAt night, absorption and re-emission of longwave infrared radiation produce a net warming of surface air42 (2)^ Annexes,[pageneeded] in IPCC AR4 SYR 2007"Recent intensification of wind-driven circulation in the Pacific and the ongoing warming hiatus"13 (5): 419433The eruption of Mount Pinatubo in 1991, the second largest terrestrial eruption of the 20th century, affected the climate substantially, subsequently global temperatures decreased by about 0.5C (0.9F) for up to three years.[51][52] Thus, the cooling over large parts of the Earth reduced surface temperatures in 199193, the equivalent to a reduction in net radiation of 4 watts per square meter.[53] The Mount Tambora eruption in 1815 caused the Year Without a Summer.[54] Much larger eruptions, known as large igneous provinces, occur only a few times every fifty hundred million years through flood basalt, and caused in Earth past global warming and mass extinctions.[55](pb: 978-0-521-70596-7)Ice coresL.; Barke, J.; Brinkhuis, H.; Reichart, GWassenaar; VRetrieved 20 June 2011 e44e635bdc
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