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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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French Ambassador pledges support for relief efforts

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A meeting between the Secretary to the President, Dr. Nandika Sanath Kumanayake and the French Ambassador to Sri Lanka,  Rémi Lambert, was held on Tuesday (09) afternoon  at the Presidential Secretariat.

During the discussion, the French Ambassador assured the Secretary to the President that the French Development Agency would extend its support to the Government’s programme for providing relief to those affected by Cyclone Ditwah and for rebuilding Sri Lanka. He further stated that steps are being taken to dispatch a team of experts to the country in the near future.

The Deputy Head of Mission at the French Embassy, was also present on this occasion.

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India extends multi-front support to Sri Lanka’s cyclone relief efforts

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India has strengthened its humanitarian support to Sri Lanka in the aftermath of Cyclone Ditwah, providing critical air assets, emergency supplies, engineering equipment and medical aid to bolster national rescue and recovery operations.

India dispatched an additional MI-17 helicopter to assist the Sri Lanka Air Force (SLAF) in ongoing air rescue missions on Tuesday (09). Two MI-17 V5 helicopters of the Indian Air Force had been operating in Sri Lanka from 29 November, conducting around 90 sorties, rescuing approximately 270 survivors, airlifting about 50 tonnes of relief material to inaccessible areas and relief camps and deploying 57 Sri Lankan troops to cut-off locations.

Having completed their flying hours, the two helicopters returned to India on Sunday (08) for mandatory maintenance and a fresh MI-17 aircraft arrived at Katunayake Airport to continue operations alongside the SLAF.

The aviation support comes alongside major maritime assistance. The Indian naval vessel INS Gharial arrived at the Port of Trincomalee on Sunday (08) carrying a 700-tonne humanitarian shipment, marking India’s fifth naval relief consignment to Sri Lanka, apart from 10 aircrafts and 5 helicopters, which have contributed towards rescues and relief operations, since the cyclone.

The shipment included essential food supplies such as pulses, sugar and milk powder, as well as bed sheets, towels, sarees, dhotis and tarpaulins for families displaced by flooding and landslides. The emergency aid is being directed to the hardest-hit districts through local relief agencies.

In a further show of engineering support, India has also handed over a 63-ton Bailey bridge and a consignment of essential medicines to Sri Lankan authorities to restore connectivity and meet urgent medical needs in affected communities.

The cargo was received by General Chaminda Wijerathne of the Sri Lanka Army Headquarters, Sunil Jayaweera, former Director Preparedness of the Disaster Management Centre (DMC), now volunteering in the response and Shan Pathirana, Deputy Director of the DMC Awareness Division.

The handover was facilitated by the Indian High Commission in Colombo.

These coordinated air, sea and engineering initiatives underscore India’s continued commitment to supporting Sri Lanka during its national emergency response and long-term recovery. The assistance forms part of India’s broader partnership to restore essential services, reconnect isolated communities and provide relief to thousands affected by Cyclone Ditwah.

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Relief Cargo from the UAE arrives in Sri Lanka

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In a significant gesture of solidarity and support, a relief cargo from the United Arab Emirates has been officially received in Sri Lanka.

The cargo was accepted by key representatives from the Middle East Division of the Ministry of Foreign Affairs, including Ms. Ishara De Silva and Ms. Sajeeda Rasheed, both serving as Assistant Directors.

Joining them were  Sunil Jayaweera, a former Director of Preparedness at the Disaster Management Center (DMC), who has returned to volunteer after retirement and . Shan Pathirana, Deputy Director of the Awareness Division at DMC.

The cargo was presented by the Deputy Head of Mission, representing the UAE, highlighting the strong ties and commitment to humanitarian aid between the two nations.

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