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Climate change driving dramatic rise in sea levels: NASA

The researchers said that the speed of the acceleration can be affected by geological events such as volcanic eruptions or by climate patterns such as El Nino and La Nina

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This year NASA discovered few earth like planets. Wikimedia Commons
This year NASA discovered few earth like planets. Wikimedia Commons
  • Sea levels are at the risk of rising due to rapid climate change
  • Sea levels are expected to rise twice as high by 2100
  • It is now high time we do something about the climate change

The sea level may rise twice as high by 2100 as previously estimated as a result of climate change, a new NASA study says.

According to the findings detailed in the journal Proceedings of the National Academy of Sciences, arise in sea level may increase by up to 65 centimetres in the next 80 years, enough to cause significant problems for coastal cities, Space.com reported on Friday.

ISS is a permanent base for astronauts stationed in the outer sky. Wikimedia Commons
Sea levels are rising due to climate change: NASA. Wikimedia Commons

“This is almost certainly a conservative estimate,” said Steve Nerem, Professor at the University of Colorado-Boulder, who led the NASA Sea Level Change team that conducted the study.

This acceleration has been driven mainly by increased ice melting in Greenland and Antarctica, the study said.

Also Read: Space station crew will experience New Year’s Eve 16 times, says NASA

The findings are based on 25 years of NASA and European satellite data.

Sea levels are constantly rising which is a matter of great concern. www.austradesecure.com
Sea levels are constantly rising which is a matter of great concern. www.austradesecure.com

“Our extrapolation assumes that sea level continues to change in the future as it has over the last 25 years. Given the large changes we are seeing in the ice sheets today, that is not likely,” Nerem said in a statement.

Rising concentrations of greenhouse gases in Earth’s atmosphere increase the temperature of air and water, which causes sea level to rise in two ways.

First, warmer water expands, and this “thermal expansion” of the ocean has contributed about half of the seven centimetres of global mean sea level rise that has been observed over the past 25 years, Nerem said.

Second, the water from melting land ice flows into the ocean, which also increases sea level around the world. The rate of sea level rise has risen from about 2.5 millimetres per year in the 1990s to about 3.4 millimetres per year today, the researchers said.

NASA
NASA constantly monitors climate change and its effects.

These increases have been measured by satellite altimeters since 1992, including the TOPEX/Poseidon, Jason-1, Jason-2, and Jason-3 missions, which have been jointly managed by NASA, France’s Centre national d’etudes spatiales, the European Organisation for the Exploitation of Meteorological Satellites, and the US National Oceanic and Atmospheric Administration.

Also Read: NASA’s Kepler Discovers Nearly 100 New Exoplanets

The researchers said that the speed of the acceleration can be affected by geological events such as volcanic eruptions or by climate patterns such as El Nino and La Nina.

They used climate models and other data sets to account for the volcanic effects and to determine the El Nino /La Nina effects, ultimately uncovering the underlying rate and acceleration of sea level rise. IANS

Next Story

Partial Shutdown of US Delays Space Missions, But NASA Not Grounded

Other active space missions includes NASA probes OSIRIS-REx and New Horizons spacecraft that continue to gather data in Earth orbit and the Moon, Mars, Jupiter and beyond, the report said

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USA, Shutdown
People rally to call for an end to the partial government shutdown in Detroit, Thursday, Jan. 10, 2019. VOA

The partial shutdown of the US federal government has had a serious impact on the country’s space agency NASA and development work on most future space missions has been slowed or suspended.

However, NASA has not been totally grounded by the partial government shutdown that began on December 22, after last-minute negotiations in Congress failed to end a budget standoff.

Over 95 per cent of the space agency’s employees have been furloughed. As a result, various research projects, including the Hubble Space Telescope has been put on hold, the Space.com reported on Wednesday.

Hubble suffered a mechanical problem that only furloughed NASA employees could repair.

Many workers also gathered outside the Johnson Space Center in Houston to protest the shutdown and its deleterious effects on their lives and the nation’s space programmes.

The Telescope facilities that have so far remained open during the shutdown will soon run out of money and cease operations.

This includes the National Radio Astronomy Observatory (NRAO), a federally funded organization that operates the Atacama Large Millimeter Array (ALMA), the Green Bank Telescope and the Very Large Array (VLA), the report noted.

The partial shutdown become the longest on record after January 12, overtaking the previous record of the 21-day impasse in 1995-96 under then President Bill Clinton.

NASA, tissue
US shutdown delays space missions but NASA not grounded: Report,

President Donald Trump and the Congress have been at loggerheads over his demand to include in the budget $5.7 billion funding for building a border wall along the Mexico border. Democratic leaders have rejected his call.

NASA’s Stratospheric Observatory for Infrared Astronomy (SOFIA), also called the “flying telescope” has also ceased operations since the shutdown.

The telescope, which is mounted to the fuselage of a Boeing 747 aircraft, has not flown since the shutdown began, the report said.

However, despite the shutdown some “excepted” employees remained at work, assisting astronauts aboard the International Space Station (ISS) and other space missions, the report said.

Also Read- National Clean Air Programme Should Set Higher Targets

Last week, astronauts aboard the ISS conducted a range of scientific experiments and public-outreach work. They engaged in an orbital Q&A with school kids and answered a variety of questions, from the nature of the research performed aboard the ISS to the type of training astronauts receive to whether your ears pop in space.

On January 13, a SpaceX Dragon cargo capsule departed the orbiting lab for Earth, eventually splashing down in the Pacific Ocean. The robotic Dragon brought down important scientific research and hardware for examination here on terra firma.

Other active space missions includes NASA probes OSIRIS-REx and New Horizons spacecraft that continue to gather data in Earth orbit and the Moon, Mars, Jupiter and beyond, the report said.  (IANS)