UN Security Council holds session on sea level rise
15 February 2023
The UN Security Council held its first ever debate on the global implications of sea level rise. UN Secretary-General António Guterres cited WMO figures that the rate of sea level rise is accelerating. This will continue in future, with a major impact on the fabric of society.
Rising sea levels are a major threat to society
Rising seas pose “unthinkable” risks to billions around the world, with profound implications for the very fabric of societies, United Nations Secretary-General António Guterres told the Security Council’s first-ever debate about the global implications of sea level rise.
Noting that some nations’ coastlines have already seen triple the average rate of sea level rise, he warned that, in the coming decades, low-lying communities – and entire countries – could disappear forever.
“We would witness a mass exodus of entire populations on a biblical scale, and we would see ever-fiercer competition for fresh water, land and other resources,” he warned.
Describing sea level rise as a threat multiplier, the Secretary-General said the phenomenon also jeopardizes access to water, food and healthcare.
Meanwhile, saltwater intrusion can decimate jobs and entire economies in industries like agriculture, fisheries and tourism, and it can damage or destroy vital infrastructure, such as transportation systems, hospitals and schools.
“Global average sea levels have risen faster since 1900 than over any preceding century in the last 3,000 years. The global ocean has warmed faster over the past century than at any time in the past 11,000 years, » he said.
Sea level rise since 1993 based on satellite measurements
WMO State of Global Climate 2022 report
"Meanwhile, the WMO tells us that even if global heating is miraculously limited to 1.5 degrees, there will still be a sizeable sea level rise,” said Mr Guterres.
The rate of sea level rise has doubled since 1993. It has risen by nearly 10 mm since January 2020 to a new record high in 2022, according to WMO’s provisional State of the Global Climate in 2022 report. The past two and a half years alone account for 10 percent of the overall rise in sea level since satellite measurements started nearly 30 years ago.
Although this is still measured in terms of millimetres per year, it adds up to half to one meter per century and that is a long-term and major threat to many millions of coastal dwellers and low-lying states.
Mr. Guterres warned the Security Council that, under any temperature rise scenario, countries from Bangladesh to China, India and the Netherlands will all be at risk. Mega-cities on every continent will face serious impacts. The danger is especially acute for some 900 million people living in coastal zones at low elevations –one out of every ten people on earth.
Csaba Kőrösi, the current President of the General Assembly, also addressed the Council, recalling that climate change – “the greatest challenge of our generation” – was the issue most raised by world leaders during the Assembly’s last high-level debate.
Citing projections that between 250 and 400 million people will likely need new homes in new locations in fewer than 80 years, he also warned of devastating impacts for the world’s “breadbaskets,” especially fertile deltas along the Nile, Mekong and other rivers.
“What is needed now – as ever – is the political will to act,” he said.