Highlighting seas that are rising at an accelerating rate, especially in the far more vulnerable Pacific Island nations, United Nations Secretary-General Antonio Guterres issued yet another climate SOS to the world. This time he said those initials stand for “save our seas.”
The United Nations and the World Meteorological Organization Monday issued reports on worsening sea level rise, turbocharged by a warming Earth and melting ice sheets and glaciers. They highlight how the Southwestern Pacific is not only hurt by the rising oceans, but by other climate change effects of ocean acidification and marine heat waves.
Guterres toured Samoa and Tonga and made his climate plea from Tonga’s capital on Tuesday at a meeting of the Pacific Islands Forum, whose member countries are among those most imperiled by climate change. Next month the United Nations General Assembly holds a special session to discuss rising seas.
“This is a crazy situation,” Guterres said. “Rising seas are a crisis entirely of humanity’s making. A crisis that will soon swell to an almost unimaginable scale, with no lifeboat to take us back to safety.”
“A worldwide catastrophe is putting this Pacific paradise in peril,” he said. “The ocean is overflowing.”
A report that Guterres’ office commissioned found that sea level lapping against Tonga’s capital Nuku’alofa had risen 8.3 inches between 1990 and 2020, twice the global average of 3.9 inches. Apia, Samoa, has seen 1 foot of rising seas, while Suva-B, Fiji has had 11.4 inches.
“This puts Pacific Island nations in grave danger,” Guterres said. About 90 percent of the region’s people live within 3 miles of the rising oceans, he said.
Since 1980, coastal flooding in Guam has jumped from twice a year to 22 times a year. It has gone from five times a year to 43 times a year in the Cook Islands. In Pago Pago, American Samoa, coastal flooding went from zero to 102 times a year, according to the WMO State of the Climate in the South-West Pacific 2023 report.
While the western edges of the Pacific are seeing sea levels rise about twice the global average, the central Pacific is closer to the global average, the WMO said.
Sea levels are rising faster in the western tropical Pacific because of where the melting ice from western Antarctica heads, warmer waters and ocean currents, UN officials said.
Guterres said he can see changes since the last time he was in the region in May 2019.
“The alarm is justified,” said S. Jeffress Williams, a retired U.S. Geological Survey sea level scientist. He said it is especially bad for the Pacific Islands because most of the islands are at low elevations, so people are more likely to get hurt. Three outside experts said the sea level reports accurately reflect what is happening.
The Pacific is getting hit hard despite only producing 0.2 percent of heat-trapping gases causing climate change and expanding oceans, the UN said. The largest chunk of the sea rise is from melting ice sheets in Antarctica and Greenland. Melting land glaciers add to that, and warmer water also expands based on the laws of physics.
Antarctic and Greenland “melting has greatly accelerated over the past three to four decades due to high rate of warming at the poles,” Williams, who was not part of the reports, said in an email.
Globally, sea level rise has been accelerating, the UN report said, echoing peer-reviewed studies. The rate is now the fastest it has been in 3,000 years, Guterres said.
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