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Climate change threatens Hadrian’s Wall treasures in England

ONCE BREWED, UNITED KINGDOM (AFP) – Nineteen hundred years after it was built to keep out barbarian hordes, archaeologists at Hadrian’s Wall in northern England are facing a new enemy – climate change, which threatens its vast treasure trove of Roman artefacts.

The wall was begun in 122 AD during the reign of emperor Hadrian and marked the boundary between Roman Britannia and unconquered Caledonia.

The Roman soldiers who lived there left behind not just wooden structures but the fascinating detritus of everyday life that allows archaeologists today to reconstruct how they lived in the windswept north of the empire.

They include the fort of Vindolanda, some 33 miles west of the modern day city of Newcastle upon Tyne, a Roman settlement at the original eastern end of the wall, then named Pons Aelius.

“A lot of the landscapes at Hadrian’s Wall are preserved under peat bog and marsh – very wet, very moist ground, which has protected the archaeology for almost two millennia,” Director of Excavations and Chief Executive of the Vindolanda Trust Andrew Birley told AFP.

Archaeologists say climate change is affecting the preservation of ancient artefacts as the wet, peaty soil is drying out with higher temperatures. PHOTO: PHYS.ORG

“But as global warming takes place, climate change takes place,” he added. The ground heats up more rapidly than the air temperature, caking the previously moist soil and letting oxygen in through the resulting cracks. “When that oxygen gets in there, things that are really delicate, that are made of leather, textile, items of wood, crack, decay and are lost forever,” said Birley.

Over the years, the dramatic landscape around the wall has revealed stone and wooden structures, leather shoes and clothing, tools, weapons and even handwritten wooden tablets, feeding knowledge of what Roman life in Britain was like.

Only around a quarter of the site at Vindolanda has been excavated, and the fort is just one of 14 along Hadrian’s Wall, a designated UNESCO World Heritage site since 1987 and one of Britain’s best-known ancient tourist attractions.

“Less than one per cent of Hadrian’s Wall has been explored archaeologically and a lot of that landscape is protected in this wet peat land environment and that’s a landscape that’s really under threat.”

Thanks to the black, peaty soil, many of the artefacts have kept a fascinating level of detail.

“They are fantastic because they’ve completely changed our perception of the Roman Empire the Roman army, they’ve changed it from being a male preserve to lots of women and children running around,” he said.

“And without these artefacts surviving, we wouldn’t have had that information and that’s the sort of stuff that’s under threat because of climate change.”


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