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In the past 139years, the warming trend that we are having now has never experienced by earth before (NASA, 2020). In fact, the World Meteorological Organisation has stated that since 1980s, each decade has been warmer than the previous one. Though the scientific evidence seems devastating in favour of global warming, there are those, for very few reasons, who considers global warming as a hoax or not empirically proved. This is upsetting, as the future of our planet is at risk, and the last thing we should do in this critical time is debate whether or not our world is being demolished. In order to enlighten those who thinks global warming is not currently happening, tis presentation will discuss evidence that how global warming is existent due to sea levels rising, global temperatures rising and coral bleaching.
Firstly let us discuss about rising temperature. One of the most obvious and immediate effects of global warming is the increasing in temperature around the world. According to National Oceanic and Atmospheric Administration, the temperature has increased at an average rate of 0.07degree Celsius per decade since 1880 and it has increased twice as great since 1981 as temperature has increased to 0.20 degree Celsius per decade. This clearly demonstrates that global warming is causing the temperature to rise at an unprecedented rate. If the current trend of temperature rising continues, it would be impossible for human beings and living creatures to survive in Earth after 80 decades. According to National Center for Environmental Information, the current earth temperature is 13.86 degree Celsius. However, without any action, the earth temperature would be 43.72 degree Celsius within next 80 decade. As human can only survive up to 40 degree Celsius, it can extinct the human population in the earth for forever.
Secondly, Let us talk about the unusual rising of sea level around the globe. The main reason why sea level is rising is because of the warming of sea water. The water expands when it get warm. It is also because of the melting of land-based ice, such as glaciers and ice sheets. According to the World Counts, a whopping 750 billion tons of ice is melting every year as a result of temperature rising. Sea level rising posing a threat towards human extinction. According to NASA, the rate of sea level rising has risen from 0.1 inch per year in 1990s to 0.13 inches per year today. It is also scientifically clarified that within next 80 decades without action, the sea level will rise up to 104 inches (2.6m). As average human height is 1.7metre, it would extinct the humans lives in the earth for forever. With the current trend, it would also be no surprise if the world is going to be underwater within next 80 decade.
Last but not least effect of global warming is in marine ecosystem known as ocean acidification. As levels of Carbon dioxide increase, the oceans absorb some of that gas, which increases the acidity of the water leading to coral bleaching at a rapid rate. According to Carbon Brief, bleaching events have become five times more frequent, with the average reef being affected once every 25 to 30 years in the 1980s and once every six years in 2016. To examine how coral bleaching is impacting the Great Barrier Reef, the scientists measured calcification and net ecosystem productivity (NEC) and associated the data to similar studies conducted before the 2015–2016. The researchers quantified variations in seawater chemistry around the reef, including the total alkalinity and dissolved inorganic carbon. These data revealed that the reef was taking up 44% less calcium carbonate when comparing to the pre bleaching studies. The results indicated a definite decrease in NEC as an outcome of the bleaching (Eos). Therefore, the impact of global warming in Marine ecosystem is clearly evident. Are you planning on visiting Great Barrier Reef in next 10 years’ time? Well then it is the time to think scientifically about how we can conserve them. According to Nancy Knowlton (Marine Biologist), if the current trend of coral bleaching continues, over 90 percent or more of the living coral will be gone from the central and southern parts of the Great Barrier Reef in just 10 years. Therefore, global warming is not a strange, local phenomenon: It is global catastrophe that needs to be addressed.
In conclusion, global warming is real. It is indeed one of the major challenge that earth is facing today and would be facing in future if action not taken urgently for mitigation. If the current trends of global warming continues, the consequences we and our future generation would be facing are dreadful. Many people take global warming as a light issue but they don’t realise that in 10 years’ time without action, we would lose almost 90% of corals from Great Barrier Reef. Humans and living creatures in the earth are also at risk of extinction as by next 80 decade, earth temperature is going to peak at 43.72 degree Celsius if current trend of temperature rising continues. Sadly, Sea level is also expected to rise by 2.6 metres within next 800 years. It is evident that we still have a lot of years before human lives ends in the earth, it is in fact not that long. After our generation, there is only 3 generation of lives left before the earth ends. It would only escalate the effects if we do not take action now. This is why global warming is simply the biggest issue there is. It would only makes sense as a modern generation to step up and let our voice be heard by the world rather than arguing if it is fake or real.
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