In the past 1,300 years, the earth has not experienced such a warming trend as we are having now (NASA, 2016). In fact, the World Meteorological Organisation has stated that the global temperature is 1.2C above pre-industrial levels and for three years in a row, it has been the hottest year on record (Carrington, 2016). Though the scientific evidence seems overwhelming in favor of global warming, there are those, for various reasons, who believe that global warming is a hoax or not empirically verified. This is disappointing, as the future of our planet is at stake, and the last thing we should do in this critical time is argue whether or not our world is being destroyed. In order to enlighten those who believe global warming is not currently happening, I will present evidence that will show that global warming is real due to sea levels rising, global temperatures rising, warming oceans, shrinking ice sheets, declining Arctic sea ice, glacial retreat, extreme temperature events, ocean acidification, and decreased snow cover. In turn, I will also discuss counterarguments and their refutations.
The world over, sea levels are rising at an unprecedented rate. Two reasons why sea levels are rising is because of the warming of sea water (water expands when it warms) and the melting of land-based ice, such as glaciers and ice sheets. According to scientists John Church and Neil White, the global sea level rose 17 centimeters (6.7 inches) in the last century. Furthermore, the rate in this last decade has been nearly double compared to the last century (Church & White, 2006). So, if we compare the sea levels from this century to the last, it is obvious that sea levels are taking an unexpected turnand the global rise in temperature has much to do with this.
A global rise in temperature has been obvious for some years now. T.C. Peterson et.al., in their analysis for the Special Supplement to the Bulletin of the American Meteorological Society, found most of the warming happened in the past 35 years, with 15 of the 16 warmest years on record occurring from 2001. In addition, 2015 was the first time the global average temperatures were 1 degree Celsius or more above the 1880-1899 average (T.C. Peterson et.al, 2016). This clearly demonstrates that global warming is a recent phenomenon, and should be considered especially dangerous if it continues at its current rate.