Published: Sat, November 18, 2017
Sci-tech | By Carrie Guzman

Mangaluru ahead of Mumbai, New York in flooding risk

Mangaluru ahead of Mumbai, New York in flooding risk

Glaciers in Greenland are melting at an increasingly rapid pace, partially due to rising global temperatures caused by human activity.

As ice sheets and glaciers undergo climate-related melting, they change the Earth's gravity field, leading to sea level changes that are not uniform around the planet.

The study is based on findings by the scientists at NASA'S Jet Propulsion Laboratory from forecasting tool and gradient fingerprint mapping (GFM).

As Earth's conditions continue to change, the experts say the tool can be modified for more accurate predictions. If west Antarctica collapses, the world could experience an average of four feet of sea level rise.

The research that led to the creation of this tool was published this week in the journal Science Advances. The online tool can be a bit technical to use and understand.

"This study allows one person to understand which icy areas of the world will contribute most significantly to sea level change (rise or decrease) in their specific city", Eric Larour, the project lead for NASA JPL's Ice Sheet System Model (ISSM) and lead author of the study, told CNN. For example, ice melting from the northeastern half of Greenland will most heavily affect New York City despite some other coastal cities being closer.

In the study, the researchers "looked at 293 major port cities to allow coastal planners to readily calculate local seal level change", as well as know which locations of the Earth's polar ice cap melts present the biggest danger to them in particular.

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This implies, however the frosty nation is more than 3,000 miles from NY, water from Greenland will influence NY more than other beach front urban areas that it's nearer to including Boston, Mass., St John's, Newfoundland and Halifax, Nova Scotia.

There is a physical explanation for this - gravity. This is because when a large ice body loses mass, it no longer exerts the same gravitational pull of the ocean, which in turn, causes the sea level around the ice mass to decrease.

Past NASA inquire about has said that if Antarctic ice in the western part of the mainland were to soften, the world's ocean levels would rise four feet over the globe, yet the Eastern Seaboard of the USA would see ascents of more than triple that gauge.

That could be the case in cities such as Reykjavik, Iceland, or Halifax, Canada.

NASA's new simulation is the most recent to visualize these changes, but it takes things a step further by breaking down which cities will be effected by various sources of melting ice.

And, the map reveals one ice sheet could have vastly different effects on certain areas of the world, depending on which part melts.

The tool incorporates all the factors that will impact sea level changes at various points around the globe over time.

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