Thursday January 18, 2018
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Nearing the doomsday: Rising sea levels drowning metropolitan cities of the world

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New Delhi: According to a report recently published which looks toward the ice sheets of Antarctica, the alarming rise in the sea levels can be responsible for the drowning of major coastal cities.

The study suggests the aftermath can manifest into an increase of a three feat rise in the sea levels by the end of this century. Though it is reported that the low-lying cites as New York and Hong Kong will be at the downside, the authors are most concerned about metropolises like that of Boston, which are vulnerable to face an over five feet extension of the sea levels at the close of the coming century.

The Climate Change Summit, which has held last year in Paris, had the prominent leaders of the world pledging to cut the carbon greenhouse gas emissions and keeping the surge of global warming under the mark of 2 degrees Celsius.

Unfortunately, Pollard and DeConte in their report write that upon the evaluation of the data, it can be said that the final conclusions are overriding the predictions made by the Intergovernmental Panel on Climate Change. And apparently, those were considered, till recently as the worst-case scenario affecting our planet.

By 2100, there can be a rise of about two meters upon melting of ice in the poles. Pollard, opines that the probable effects to follow this will be something like the hazardous form of Hurricane Sandy, one which will have the potential to contribute to future flood losses.

Both Pollard and DeCante says that the rise in the sea levels will be accounting to an estimate of nearly 50 meters in Antarctica alone, and all of these will be taking place by 2500. While the latter is of the opinion, as given in an interview, that the global warming will be trapping the coastal cities and the defense mechanisms will be proven to be ineffective then.

Still, the calling of the doomsday can be countered, as stated by DeConte by curtailing the dangerous emissions and keeping the Antarctica, well frozen.

(Inputs from huffingtonpost.com)

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Scientists spot massive ice deposits on Mars

Recent observations by MRO's ground-penetrating Shallow Radar instrument revealed a buried ice layer that covers more ground than the state of New Mexico.

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Scientists found layers of ice on the surface of Mars. Wikimedia Commons
  • Recently, scientists have found layers of ice on the Martian land.
  • Scientists think this ice might be a useful source of water for future humans.
  • The researchers had researched 8 locations on the surface of Mars.

Scientists have unearthed thick and massive deposits of ice in some regions on Mars.

The images taken by the High-Resolution Imaging Science Experiment (HiRISE) camera aboard NASA’s Mars Reconnaissance Orbiter (MRO) showed the three-dimensional structure of massive ice deposits on Mars.

The ice sheets extend from just below the surface to a depth of 100 meters or more and appear to contain distinct layers.

It extending downward from depths as shallow as 1 to 2 meters below the surface, which could preserve a record of Mars’ past climate, the researchers noted in the journal Science.

This ice which was found can help scientists understand the climate history of Mars. IANS
This ice which was found can help scientists understand the climate history of Mars. IANS

“We expect the vertical structure of Martian ice-rich deposits to preserve a record of ice deposition and past climate,” said Colin M. Dundas, from the US Geological Survey.

“They might even be a useful source of water for future human exploration of the red planet,” Dundas added.

The researchers investigated eight locations on Mars and found thick deposits cover broad regions of the Martian mid-latitudes with a smooth mantle.

However, erosion in these regions creates scarps that expose the internal structure of the mantle.

The scarps are actively retreating because of sublimation of the exposed water ice.

The layers of ice can be used as water source by future humans on Mars, VOA
The layers of ice can be used as water source by future humans on Mars, VOA

The ice deposits likely originated as snowfall during Mars’ high-obliquity periods and have now compacted into massive, fractured, and layered ice.

Previous researchers have revealed that the Red Planet harbours subsurface water ice.

Recent observations by MRO’s ground-penetrating Shallow Radar instrument revealed a buried ice layer that covers more ground than the state of New Mexico.

NASA’s Phoenix lander had also dug up some ice near the Martian north pole in 2008, however, it is not clear if that is part of the big sheet. IANS

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