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Emissions Could Add 15 Inches to 2100 Sea Level Rise, NASA-Led Study Finds

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GREENBELT, Md. — An international effort that brought together more than 60 ice, ocean and atmosphere scientists from three dozen international institutions has generated new estimates of how much of an impact Earth’s melting ice sheets could have on global sea levels by 2100.

If greenhouse gas emissions continue apace, Greenland and Antarctica’s ice sheets could together contribute more than 15 inches (38 centimeters) of global sea level rise – and that’s beyond the amount that has already been set in motion by Earth’s warming climate.

Results from this effort are in line with projections in the Intergovernmental Panel on Climate Change’s (IPCC) 2019 Special Report on Oceans and the Cryosphere. Meltwater from ice sheets contribute about a third of the total global sea level rise. The IPCC report projected that Greenland would contribute 3.1 to 10.6 inches (8 to 27 cm) to global sea level rise between 2000-2100 and Antarctica could contribute 1.2 to 11 inches (3 to 28 cm).

These new results, published this week in a special issue of the journal The Cryosphere, come from the Ice Sheet Model Intercomparison Project (ISMIP6) led by NASA’s Goddard Space Flight Center in Greenbelt, Maryland. The study is one of many efforts scientists are involved in to project the impact of a warming climate on melting ice sheets, understand its causes and track sea level rise.

“One of the biggest uncertainties when it comes to how much sea level will rise in the future is how much the ice sheets will contribute,” said project leader and ice scientist Sophie Nowicki, now at the University at Buffalo, and formerly at NASA Goddard. “And how much the ice sheets contribute is really dependent on what the climate will do.”

“The strength of ISMIP6 was to bring together most of the ice sheet modeling groups around the world, and then connect with other communities of ocean and atmospheric modelers as well, to better understand what could happen to the ice sheets,” said Heiko Goelzer, a scientist from Utrecht University in the Netherlands, now at NORCE Norwegian Research Centre in Norway. Goelzer led the Greenland ice sheet ISMIP6 effort.

With warming air temperatures melting the surface of the ice sheet, and warming ocean temperatures causing ocean-terminating glaciers to retreat, Greenland’s ice sheet is a significant contributor to sea level rise. The ISMIP6 team investigated two different scenarios the IPCC has set for future climate to predict sea level rise between 2015 and 2100: one with carbon emissions increasing rapidly and another with lower emissions.

In the high emissions scenario, they found that the Greenland ice sheet would lead to an additional global sea level rise of about 3.5 inches (9 cm) by 2100. In the lower emissions scenario, the loss from the ice sheet would raise global sea level by about 1.3 inches (3 cm). This is beyond what is already destined to be lost from the ice sheet due to warming temperatures between pre-industrial times and now; previous studies have estimated that ‘locked in’ contribution to global sea level rise by 2100 to be about a quarter-inch (6 millimeters) for the Greenland ice sheet. – NASA’s Goddard Space Flight Center



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President Ranil Wickremasinghe calls upon chief prelates of Asgiriya and Malwatta chapters

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(pic courtsey Divaina)

President Ranil Wickremasinghe called upon the chief prelates of the Asgiriya and Malwatta chapters on Thursday (02) morning to seek their blessings ahead of the 75th Independence day celebrations.

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US secures deal on bases to complete arc around China

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US Defense Secretary Lloyd Austin (R) was in the Philippines to finalise the deal (picture BBC)

BBC reported that the United States has secured access to four additional military bases in the Philippines – a key bit of real estate which would offer a front seat to monitor the Chinese in the South China Sea and around Taiwan.

With this deal, Washington has stitched the gap in the arc of US alliances stretching from South Korea and Japan in the north to Australia in the south.

The missing link had been the Philippines, which borders two of the biggest potential flashpoints, Taiwan and the South China Sea, or the West Philippine Sea as Manila insists on calling it.

The US already had limited access to five sites under the Enhanced Defense Cooperation Agreement (EDCA) – the new additions and expanded access, according to a statement from Washington, will “allow more rapid support for humanitarian and climate-related disasters in the Philippines, and respond to other shared challenges”, likely a veiled reference to countering China in the region.

The statement came after Defence Secretary Lloyd Austin met Philippine President Ferdinand “Bongbong” Marcos Jr in Manila on Thursday.

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Nuland accuses China of failing to help SL with ‘credible and specific assurances’ acceptable to IMF

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Nuland addressing the media in Colombo (pic by Thushara Atapattu)

US hopes LG polls will be held in March

By Saman Indrajith

US Under Secretary of State for Political Affairs, Victoria Nuland, yesterday said China had not provided credible and specific assurances to the International Monetary Fund (IMF) for Sri Lanka to overcome the current economic crisis.

Addressing the media in Colombo, Nuland said: “What China has offered so far is not enough. We need to see credible and specific assurances that they will meet the IMF standard of debt relief. We, the United States, are prepared to do our part. Our Paris Club partners are prepared to do their part. India has made strong commitments that it will provide the credible assurances the IMF is looking for.”

Nuland said that India and the Paris Club had given strong assurances to the IMF to help Sri Lanka to obtain a $2.9 billion bailout.

“We want to see an IMF program as quickly as possible. That is what Sri Lanka deserves; that is what Sri Lanka needs,” Nuland said.

Nuland said the US would give Sri Lanka an additional USD 30 million to provide 96,000 schoolchildren with food.

She said Sri Lankans had taken to the streets, last year, demanding cleaner, accountable and inclusive governance, with transparency, and the government was expected to hold the elections to enable people to enjoy their democratic rights.

Nuland said that the US was glad to see that consultation between the government and other parties towards reconciliation had commenced. She said that she had met with members of the Tamil political parties, earlier yesterday. “We hope that the dialogue will continue to achieve real results such as return of the lands to their rightful owners.”

Nuland said that the US hoped that local elections would be held in March, the dialogue commenced for reconciliation would continue, and the Prevention of Terrorism Act would be reformed to meet international standards.

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