Some of Mexico's glaciers may have disappeared by 2023.
It is difficult to estimate exactly when the ice sheets will become extinct, but at least one glaciologist believes the glaciers of Iztaccihuatl, a dormant volcano and that of the country The third highest could have disappeared within the next decade – or even earlier.
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"The Iztaccihuatl volcano still has ice bodies in the abdomen and chest, but most likely in five or 10 years, they only see each other as ice bodies and declare themselves extinct, "said Hugo Delgado Granados, a glaciologist at the National Autonomous University of Mexico, on telesur English. "It's difficult to make a precise prediction, but if patterns of glacier retreat follow, it will disappear."
The potential disappearance of the glaciers has taken a long time to come. For decades, climatic changes have affected both Iztaccihuatl and many other masses of ice around the globe. Between 1960 and 2007, Iztaccihuatl's glaciers shrank by 70 percent, Christian Huggel a glaciologist at the University of Zurich, told Reuters in 2007.
"Iztaccihuatl glaciers are sentenced to death," said Huggel on  Related: Confused heat from deep in the earth melts Greenland's glacier
When glaciers disappear, the consequences are global. It causes the water reserves to dry up and a limited supply of water remains in the populated areas of the country, said Delgado Granados, according to a Mexican news agency Notimex.
In 2001, the glaciers on Popocatépetl in central Mexico became extinct, meaning that although there is ice, it does not move anymore. Movement is a characteristic glacial feature, wrote Granados and his colleagues in an article published in the journal Global and Planetary Change .
Other glaciers in the country, such as those on the dormant volcano Pico de Orizaba, will probably be longer than the Iztaccihuatl Glacier , but not much. It is estimated that it will survive for several decades due to its extreme altitude.