Sea levels are rising at an alarming rate, posing a significant threat to coastal communities and low-lying islands worldwide. According to the United Nations, global sea levels have increased by about 21 centimeters since records began in 1880, with over 10 centimeters of that increase occurring in just the last decade. A new UN report titled “Surging Seas in a Warming World” warns that the global mean sea level is rising faster than ever in the past 3,000 years.
Projections indicate that by 2100, over 410 million people could be affected by rising seas. The main causes of sea level rise are the melting of glaciers and polar ice caps and the thermal expansion of seawater as it warms. The Thwaites Glacier in Antarctica, nicknamed the “doomsday glacier,” is melting faster than expected.
NASA cautions that sea levels could rise by about three meters if it collapses entirely. Since 1971, oceans have absorbed over 90% of the excess heat in the Earth’s system, leading to significant warming. The past decade has been the warmest for the oceans since the 1800s, further contributing to rising sea levels.
Rising threat to coastal communities
The UN has identified several countries at high risk from rising seas, especially the Pacific Small Island Developing States like Kiribati, Tuvalu, and the Marshall Islands. These nations are highly exposed to tropical storms and changes in sea level, with many low-lying coral atolls that are particularly vulnerable.
Nearly 900 million people live in low-lying coastal areas in acute danger. Countries and cities worldwide are implementing strategies to combat rising sea levels, such as building sea walls, surge barriers, and other coastal defenses. However, adaptation efforts are falling short, with an annual finance gap of $194 billion to $366 billion needed for adequate measures.
Some countries, like Fiji, have begun relocating entire villages to safer ground. To address this existential threat, the UN General Assembly will hold a High-Level Meeting on sea-level rise on September 25, 2024. The meeting will encompass the issue’s legal, financial, socio-economic, and scientific aspects.
Rising sea levels are one of the most critical threats facing the Earth’s systems, requiring immediate and coordinated global action. International organizations and governments must collaborate to implement strong strategies for mitigating and adapting to this growing danger.
Cameron is a highly regarded contributor in the rapidly evolving fields of artificial intelligence (AI) and machine learning. His articles delve into the theoretical underpinnings of AI, the practical applications of machine learning across industries, ethical considerations of autonomous systems, and the societal impacts of these disruptive technologies.
