The to move more quickly into the sea.

The southern tip of Greenland shows the island’s vast ice sheet fringed by glaciers that flow into the sea. Credit: NASA¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯The sea level is steadily rising, and is rising at a faster rate each year. Climate change has greatly affected the Earth and its inhabitants, with catastrophes and natural disasters such as droughts being more common, intense, ravenous floods, increase in storm severity, and many more. Easily one of the worst products of climate change is the ever rising sea-level. This issue has the potential to displace millions,  of people, leaving coastal areas and communities submerged and uninhabitable.Over the last hundred years, satellite measurements have told us that the average sea level height or Global Mean Sea Level has risen by four to eight inches. However, the yearly rate of the past twenty years has been point one-three inches a year, almost twice the average speed of the previous eighty years. At this rate the sea level will be rising much more than was originally thought. (Satellite info. Provided by NASA)The reason this is happening at such a fast is due to the lasting effects of Climate change and Global Warming. The burning of fossil fuels, as well as other human and natural activities over the last hundred years, have released tremendous amounts of heat-trapping, greenhouse-gases like carbon dioxide into the atmosphere. These greenhouse-gas emissions have caused the Earth’s surface temperature to rise significantly, and the oceans absorb roughly eighty percent of this additional heat. (According to National Geographic)Why does the Earth’s heating directly impact the rise in sea level? There are three main factors all contributing to this key concept. These is (i) Thermal Expansion: As water heats up, it expands–the same way molecules spread further apart in hotter conditions. Roughly fifty percent of the past century’s rise in sea level is attributable to warmer oceans taking up more space. (According to National Geographic)(ii) The most significant of all is the melting of Polar Ice Caps and Glaciers. Large ice formations, such as the polar ice caps and glaciers, naturally melt a small amount each summer. In winter, snow from evaporated-seawater balances the melting, putting the ice formations in a state of equilibrium. Recently, however, growing temperatures due to global warming have led to greater than than average summer melting as well as less intense snowfall from late winters and early springs/summers.(iii) The most significant of the ice formations; West Antarctica and Greenland: As well as the glaciers and ice caps, increased heat is causing the enormous ice blankets over Antarctica and Greenland to melt at an accelerated speed. According to National Geographic, glaciers that flow into the ocean (Antarctica and Greenland) are the most susceptible to climate change’s effects. Scientists believe melted water from above and seawater from below is seeping beneath the Antarctic and Greenland’s ice sheets, effectively lubricating ice sheets and allowing them to move more quickly into the sea. Hotter sea temperatures are causing the large ice shelves that extend out from Antarctica to melt from below, loosen, and then eventually break off. The glaciers and ice sheet of Greenland cover a land area greater than the combined countries of Germany, France, Spain and Italy. If all Greenland’s ice melted, sea levels would rise by roughly 23 feet. The number of people living in countries less than thirty feet above the sea level is six-hundred and thirty-four million.