Mean atmospheric O2
Geologic Time Scale
South Asia with sea level +100m
This is how South Asia may appear with mean sea level about 100 meters (330 feet) above today's. Such a dramatic rise in sea level could occur if all of the Earth's glaciers were to melt.
In this image over half of Pakistan along with the Indian state of Gujarat have become part of the Arabian Sea while the Persian Gulf has consumed Iran's border with Kuwait and some of Iraq. Bangladesh has succumbed entirely to the Bay of Bengal. The Gulf of Martaban now flows into much of Myanmar.
A likely cause of a catastrophic melting of the Earth ice stores would be a change in climate, a sudden rise in the global temperature accelerated by a runaway greenhouse effect. While the amount of water held by the Earth's glaciers can be calculated with some accuracy, the exact mechanism that would set those glaciers to melting, and how long it would take for them to melt, is poorly understood. Some models suggest that several millennia of higher temperatures would be required to melt all the world's glaciers, while others predict much faster processes on the scale of centuries, or even decades.
Copyright © Walter B. Myers. All rights reserved.
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