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The IPCC notes in its report that oceans can also offer solutions to help reduce these emissions, particularly through the development of renewable energies.Some people will try and convince you that they are trying to help mankind but I know better. Current international commitments, if respected, would lead to a world at + 3 ° C. This report adopted by the 195 member states of Giec is the fourth scientific opus of the UN in one year to sound the alarm on the impacts of climate change and to point to ways to remedy or at least limit them. These upheavals cause cascading impacts on the ecosystems on which humans depend, such as coral reefs that serve as nurseries for many species of fish or mountain areas fed by glaciers. With palpable consequences: rising sea temperature, acidification, loss of oxygen. The oceans, which cover more than 70% of the earth's surface, have absorbed about a quarter of these emissions and 90% of the additional heat generated by man-made CO2.
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The world pledged in 2015 in the Paris agreement to limit warming to + 2 ° C, or + 1.5 ° C compared to the pre-industrial era, by reducing greenhouse gas emissions. And even in a world at + 2 ° C, many megacities and small islands should be hit by 2050 at least once a year by an extreme event that only occurred every hundred years. In total, according to the report, more than a billion people will live by the middle of the century in low-lying coastal areas particularly vulnerable to floods or other extreme weather events amplified by rising sea levels and climate change. However, these protections would be more effective for coastal mega-cities than large agricultural deltas or small island states that would not have the means to finance these major projects anyway. With the proviso of investing "tens to hundreds of billions of dollars a year". According to the report, building coastal protection against rising water levels could reduce the risk of flooding by 100 to 1,000 times. Coastlines around the world will be redefined.
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Ocean levels have increased 2.5 times faster in the early 21st century than in the 20th, and will continue to increase. Save time, for example, to prepare for rising waters that favor submersion waves and storms by building dikes around large coastal mega-cities like New York or anticipating the inevitable displacement of some populations, including those of small island states that could become uninhabitable by the end of the century. The changes in the ocean will not stop suddenly by lowering emissions, but their pace should be slowed down. Two days after the New York climate summit failed to spur the hoped-for momentum, the report points out that implementing measures to reduce greenhouse gas emissions could make a real difference. Sea level rise 2.5 times faster than in the 20th century
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Some of the devastating impacts of climate change are already "irreversible", notes the UN climate panel after a meeting five-day marathon in Monaco. Rising sea levels, small islands threatened by submersion, disappearing glaciers. Victims of global warming, the oceans and frozen areas are dying at high speed, threatening entire sections of humanity that must reduce its CO2 emissions as quickly as possible to limit the damage, warns Wednesday an alarming report of the Giec. A Giec report issued Wednesday alarms the pitiful state of the oceans and frozen areas, which are declining at high speed.