Assignment is to read the 22 page IPCC AR4 summary for policymakers Essay

Assignment is to read the 22 page IPCC AR4 summary for policymakers (SPM) (Introduction cocksure 5 sections) and write a concise summary of it - Essay Exampleshift in physical and plant ranges together with the earlier timing of various spring events has been linked to warming in the planetary ecosystems while changes in icing, frozen ground and snow have resulted in a general augment in both the total number and size of glacial lakes (Ipcc, 2007).It has been shown that the cogency balance of the worlds climate system has been altered by changes in the atmospheric concentration of aerosols and various green rear gases, solar radiation and total land cover.During the period ranging between 1970 and 2004, Carbon dioxide emissions have been shown to have grown by about 80%. The atmospheric concentration methane and carbon dioxide have exceeded the pre industrial levels recorded from grump cores over the last 650,000 years. This has mainly been attributed to the use of various a gricultural products and fossil fuels (Ipcc, 2007).If the Emission of GHG continues at the topical rate, this will potentially cause changes in the planets global climate system to be larger in the 21st century than those previously observed in the 20th century. Warming is expect to reduce the ocean and terrestrial uptake of CO2 resulting in an increase in the oceans acidity with an pass judgment average decrease of its PH by about 0.1 units (Ipcc, 2007).The Greenland ice sheet is expected to continue contracting, a factor that is expected to continue playing a vital contribution to the change magnitude rise in sea levels after 2100, with various models suggesting the eventual virtual complete elimination of the ice sheet after a millennia.There are several adaptation and mitigation options available contact on various aspects. These include expanding water storage, harvesting and conservation techniques, the adjustment of agricultural product varieties and put dates, reduction of the worlds dependency on a mostly single source of energy and opting for green energy, creation of storm surge barriers and sea walls to help create a