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Increase of the temperature of the planet

07 November 2018

The United Nations -UN warns about the serious consequences that would be generated by the global 2°C temperature increase of the planet.

In a recent report issued on October 8th, 2018 by the Intergovernmental Panel on Climate Change IPPC, one of the main bodies of the United Nations in charge of evaluate the scientific knowledge related to climate change, advise about the catastrophic repercussion that the increase in 0.5°C to 1°C of the current temperature would have on the natural ecosystems of the planet. The reliability and validity of the report is endorsed by 91 authors from 44 citizenships and 40 countries of residence, 133 contributing authors, more than 6,000 cited references and a total of 42,001 review comments from experts and governments.

The Paris Agreement, approved by 195 nations at COP XXI 2015, included the objective of "keeping the increase in global average temperature well below 2°C from pre-industrial levels and pursuing efforts to limit this increase of the temperature at 1.5°C with respect to the pre-industrial levels ". In this Agreement, the IPCC was entrusted with the report that now, three years later, it issues.

Among the consequences detailed in the aforementioned report, we find "a series of impacts of climate change that could be avoided by limiting global warming to 1.5°C instead of 2°C, or more".

Source

Thanks to the Intergovernmental Panel on Climate Change, we know the following:

* Between 1880 and 2012, the global average temperature increased 0.85 degrees centigrade. This means that for each degree that the temperature increases, cereal production is reduced by approximately 5%. There has been a significant reduction in the production of corn, wheat and other important crops, of 40 megatons per year worldwide between 1981 and 2002 due to a warmer climate.

* The oceans have warmed, the amount of snow and ice has decreased, and the sea level has risen. Between 1901 and 2010, the average sea level increased 19 cm, as the oceans expanded due to warming and melting ice. The extent of Arctic sea ice has been reduced in recent decades since 1979, with an ice loss of 1.07 million km2 every decade.

* Given the current concentration and continuous greenhouse gases emissions, it is likely that by the end of the century the increase in global temperature exceeds 1.5 degrees Celsius compared to the period between 1850 and 1900 in all scenarios except in one. World's oceans will warm up and the melting will continue. An average sea level rise of between 24 and 30 cm is expected for 2065 and between 40 and 63 cm for 2100. Most of the issues related to climate change will persist for many centuries, even though emissions are slowed down.

* Global emissions of carbon dioxide (CO2) have increased almost 50% since 1990.

* Between 2000 and 2010 there was an increase in emissions greater than in the previous three decades.

* If a wide range of technological measures and behavioral changes are adopted, it is still possible to limit the increase in global average temperature to 2 degrees Celsius above pre-industrial levels.

* Thanks to the great institutional and technological changes, there will be a greater opportunity than ever for global warming not to exceed this threshold.

Source: UN 

Some comments from those responsible for the report:

Hans-Otto Pörtner, Co-Chair of IPCC Working Group II. "Each extra portion temperature increase is important, especially considering that a global warming of 1.5°C or more increases the risk associated with lasting or irreversible changes, such as the loss of some ecosystems."

Panmao Zhai, Co-Chair of IPCC Working Group I. "One of the fundamental messages of the report is that we are already living the consequences of a global warming of 1°C, with more extreme weather conditions, rising sea levels and waning sea ice in the Arctic, among others changes "

According to BBC.com (8/10/2018) commenting on the report, of 7.7 million Km2 as the minimum extension of Arctic sea ice in 1980, it passes in 2018 to 4.7 million Km2. That is, almost 50% reduction in the last 40 years.

Jim Skea, Co-Chair of IPCC Working Group III. "Limiting the heating to 1.5°C is possible according to the laws of chemistry and physics, but this would require unprecedented changes"

These thematic contents can be put in series with other articles published on this website under the titles of "Global CO2 increase structural or conjunctural?" (January 2018) and / or "Kyoto-Paris" (June-July 2017), where we already examined some of the consequences of climate change. Regarding this important matter of climate change and its consequences, our company Tsolar has amply demonstrated its commitment to environmental sustainability and future projects for its achievement by generating clean energy.

BBC.com raises, among the objectives of the report, that renewable energies provide up to 85% of global electricity by 2050. Although in a somewhat catastrophic way, it announces that, according to the report, we are currently on the road to an increase of 3°C.

We conclude with some words from Sylvia A. Earle, recent Princess of Asturias concord Award 2018, and committed defender of the environment and its sustainability.

"Now we know that the ocean is the engine of climate and weather, generates most of the oxygen in the atmosphere, absorbs much of the carbon dioxide from the atmosphere, induces the chemistry of the planet and is home to most of of life on Earth. The ocean possesses ninety-seven percent of the Earth's water. (...) Without the ocean, there is no life. Without blue, there is no green.

In half a century, approximately half of the coral reefs have disappeared, along with mangroves, marshes and seagrass beds. The vast fields of oceanic plankton are those that produce more than half of the oxygen in the atmosphere that is decreasing.

Now, as never before, we know that, by protecting large natural areas of the land such as parks and nature reserves, we are protecting our life support system. The same goes for the ocean.

The actions taken in the next ten years will determine our future for the next ten thousand years. "

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