By 2100, half of the world's beaches will disappear due to climate change - ForumDaily
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By 2100, half of the world's beaches will disappear due to climate change

A study published on March 2 in the scientific journal Nature Climate Change predicts that densely populated coastlines could be subject to ever-increasing erosion, causing nearly half of the world's beaches to disappear by 2100. Scientists used satellite imagery to track how beaches have changed over the past 30 years, says Fox News.

Miami coastline erosion. Photo: Shutterstock

“Much of the world's sandy coastline is already being eroded, a situation that could be exacerbated by climate change,” the researchers write. “We show that trends in shoreline dynamics, combined with the coastal crisis caused by sea level rise, could lead to the near-total disappearance of nearly half of the world's sandy beaches by the end of the century.”

Lead author of the study, Michalis Vusdukas, said that half of these beaches “will undergo erosion of more than 100 meters. They will probably be lost. ”

The beaches are valuable for recreation, tourism and wildlife, and also provide a natural barrier that protects coastal settlements from waves and storms. A study published in February showed that extreme weather events caused by climate change could lead to an economic downturn, "something like which we have never seen before."

Many coastal areas, including beaches, have already been hit hard by human activities, such as coastal construction and internal dams, which reduce the amount of silt draining into the oceans, which is crucial for restoring beaches.

“A significant proportion of threatened sandy beaches are located in densely populated areas, highlighting the need to develop and implement effective adaptive measures,” the study authors wrote.

On the subject: The most vulnerable coastal city in the world: what will happen to Miami by 2040

Some places will be affected significantly more than others. According to the authors of the study, the Gambia and Guinea-Bissau in West Africa may lose more than 60% of their beaches.

Australia may be the hardest hit in terms of total beach coastline lost - more than 7500 miles (12 kilometers). The US, Canada, Mexico, China, Iran, Argentina and Chile could also lose thousands of miles of coastline.

Vosdoukas and other researchers took into account several scenarios, including one where global temperatures rose by 2,4 degrees Celsius and another where twice that amount increased.

A separate study published in February suggested that if global temperatures rise 50 degrees Celsius over the next 0,5 years, approximately half of the world's species will become extinct. If the temperature rose 2,9 degrees Celsius, 95% of the species would become extinct.

Vusdukas said the historic Paris climate agreement, which was signed in 2015 with the Obama administration, was not taken into account because it is unlikely to be reached. In early November, the Trump administration began its official withdrawal from the agreement.

Under the Paris Climate Agreement, signed by nearly 200 countries, including China, the long-term goal is to limit temperature increases to 1,5 degrees Celsius.

On the subject: UN: this decade will be the hottest climate observation ever

Despite the sad outcome of the study, not all hopes are lost. The authors say that even a “moderate” reduction in greenhouse gas emissions can prevent 40% of the potential shoreline retreat.

Skeptics have largely dismissed concerns about human exposure to global warming, saying that climate change has been going on since time immemorial. They also argue that the dangers of global warming are greatly exaggerated, and question the impact that fossil fuels have had on climate change.

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