Strolling along the coast of Nea Irakleia village where he would go swimming as a young man, George Perperis points to where there was once a beach, now submerged by seawater.
“Here was a 20 meter-wide beach that has completely vanished,” 59-year-old Perperis said. “Families would gather here for a swim and fishermen would lay their nets.”
Accelerating coastal erosion due to climate change poses an existential threat to places such as Nea Irakleia in western Halkidiki, a three-pronged peninsula of lush forests and golden sands in northern Greece that lives off tourism.
The region was one of those worst-hit by the financial crisis that ravaged Greece from 2010 to 2018, shrinking the economy by a quarter and tipping many into poverty.
Now the impact of rising temperatures, freak weather and accelerating coastal erosion on key sectors such as tourism and agriculture could again jeopardize the finances of Europe’s most indebted country.
“The crisis years were really difficult, a lot of stores closed and tourism tapered off. Then there was COVID-19,” said Perperis, a retired mechanic and local community leader. “But climate change might be worse. What will a tourist do here if there is no beach left?”
Experts have said that coastal erosion at Halkidiki, which attracts about 10 percent of Greece’s annual 30 million visitors, has intensified in the the past few years.
An observatory set up two years ago in Thessaloniki monitors the phenomenon using satellite photos, sea floats and algorithms. Eighteen areas that authorities call “red points” have been identified in the region, showing intense coastal vulnerability.
“Unfortunately, we can see regions where we will have serious problems across the coastline,” Macedonian Deputy Governor of Environment Costas Gioutikas said. “We see beaches literally vanish.”
Before the COVID-19 pandemic, tourism accounted for about a fifth of Greece’s economy and a similar proportion of jobs, earning revenue of 18 billion euros (US$20.8 billion) in 2019.
Economists warn that the challenges posed by climate change — freak weather patterns, tides that flood beaches, scorching summers and a decline in rainfall — could all pose a significant drag on Greece’s growth potential.
Research by the Greek Central Bank from 2009, the most recent available, showed the cost of inaction on climate change to Greece’s economy topping 700 billion euros by 2100, representing a 2 percent drop in national output every year. It said adaptation action could reduce the cost by 30 percent, and mitigation policies by a further 30 percent. An updated report is to be ready in a few months.
With a public debt estimated at 196.6 percent of GDP, Greece is the most indebted economy in the euro zone, making it vital that the country can sustain growth to keep up repayments.
“It is important to realize that Greece should be at the forefront of countries that initiate mitigation policies,” said Stavros Zenios, a professor at the University of Cyprus and a non-resident fellow at think-tank Bruegel. “For countries like Greece the expected GDP growth rate could drop to one-third by the end of the century of what it is today.”
Bank of Greece Governor Yannis Stournaras said that the country’s finances were manageable.
Interest payments on its mountain of debt — most of it refinanced at very low rates of around 1.5 percent — translate to less than 3 percent of national output annually. Growth rates should exceed borrowing costs to keep a lid on that debt, Stournaras said.
However, as world leaders meet in Glasgow for the COP26 global climate conference, Stournaras said he worried that not enough was being done to tackle the most damaging effects of global warming.
“It is not only a theory or an academic issue, it is with us now and I am afraid the world is not doing enough,” Stournaras said. “The horizon is so distant that nobody thinks we should take action now to solve what will mostly appear 50 years from now.”
This summer, Greece saw a glimpse of what a warmer future might bring, with thousands of hectares of forest burning for days in wildfires that tore through the outskirts of Athens and other areas.
Working on a scenario of a 2.5°C rise by sometime from 2046 to 2065, compared with 1971 to 2000, a team at the University of Athens predicted that heatwave days — defined by at least 3 days over 40°C — will increase by 15-20 days annually by 2050, while rainfall will decrease by 10 percent to 30 percent.
Scientists warn that sea levels could rise by 20cm to 50cm within the same period. This could render Greece’s 16,000km coastline vulnerable as one-third of the population lives at a distance of up to 2km from the coast, and 90 percent of the country’s tourism infrastructure sits on coastal areas.
Increasingly, bursts of extreme weather are also expected.
On the night of July 11, 2019, at least seven people were killed and more than 100 hurt from a violent, short-lived “supercell” storm that lashed an area not far from Nea Irakleia.
“Of course it’s all linked to the disturbances to the climate,” said Academy of Athens professor Christos Zerefos, a climate expert. “If nothing is done to stabilize the climate, such phenomena will only continue and increase in coming years.”
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