<p>The tremendous loss of a pivotal archaeological site as a result of the fire not only <a href="http://www.nps.gov/meve/learn/management/upload/arch_fire_effects.pdf">substantially changed</a> how park archaeologists treat post-fire sites, but also offered a revealing glimpse of what’s to come as the effects of climate change take hold over the next century. A <a href="http://www.ucsusa.org/sites/default/files/legacy/assets/documents/global_warming/National-Landmarks-at-Risk-Full-Report.pdf">2014 report</a> by the Union of Concerned Scientists featured Mesa Verde alongside 29 other national landmarks that are now at risk because of the effects of climate change. Researchers say climate change will make longer and hotter fire seasons, and the resultant fires could potentially devastate archaeological preserves like the one at Mesa Verde. The report notes that over the last 600 years in that region, the last 50 have been the hottest. But it’s not just Mesa Verde, or even the United States. Climate change <a href="http://www.archive.archaeology.org/0903/etc/climate_change.html">threatens to erase</a> archaeological sites across the world.</p><p class="shortcode-media shortcode-media-rebelmouse-image">
<img class="rm-shortcode" data-rm-shortcode-id="7470aff6459bb3aaeca40e4acdcd7bf1" data-rm-shortcode-name="rebelmouse-image" id="1b5f5" type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8xOTg0MDk3NC9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY2ODQ3ODYyMX0.bS7fOmblBtePSBzZPu1LXEFBxzYFjMaPuIjhv3vF78A/img.jpg?width=980"/>
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<small class="image-media media-photo-credit" placeholder="add photo credit...">Degrading Chilean Mummy. Image by Vivien Standen via Nature World News</small>
</p><p>Examples are abundant. In Peru, the intricate designs of the 600-year-old city of Chan Chan are <a href="http://www.smithsonianmag.com/travel/endangered-site-chan-chan-peru-51748031/">suffering from</a> increased torrential downpours due to overly abundant El Nino patterns. UNESCO described the erosion as “rapid and seemingly unstoppable.” Ironically, many of the same processes that put these sites at risk also turn up new artifacts. By 2007, over half of the acres in Mesa Verde had burned since the fire, revealing 676 new sites previously hidden beneath vegetation. The same ecological complications that are turning frozen Chilean mummies into <a href="http://www.seas.harvard.edu/news/2015/03/saving-chilean-mummies-from-climate-change">black ooze</a> are also causing artifacts and bodies to emerge from receding glaciers.</p><p>Maria Caffrey, a paleo-climatologist and research associate at the University of Colorado, Boulder was hired by the National Parks Service (NPS) to study how climate change will affect sea-level rises and storm surges along <a href="http://www.scribd.com/doc/211076958/NPS-Units-Vulnerable-to-Sea-Level-Change-and-or-Storm-Surge">118 costal park</a> sites. Many archaeological sites occur along coastlines, where humans settled near the water. “As the climate gets warmer, we’re estimating storms will get more intense,” Caffrey tells me.</p><p class="shortcode-media shortcode-media-rebelmouse-image">
<img class="rm-shortcode" data-rm-shortcode-id="8cfe30b915209c60f68a31a34f231f16" data-rm-shortcode-name="rebelmouse-image" id="b5595" type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8xOTg0MDk3NS9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY0NDE5NDgwMn0.0fZ_RiZlfktvgKn54oRKeGNb0afHRnq7ksVaHlejZpA/img.jpg?width=980"/>
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<small class="image-media media-photo-credit" placeholder="add photo credit...">Uncovered Yup'ik artifacts. Image via Twitter user @adndotcom</small>
</p><p>Along the northwest coast of Alaska, for example, these bigger storms, along with erosion and rising tides, <a href="http://shelbylanderson.com/research/climate-change-and-archaeology-northwest-alaska/">threaten to sweep away</a> 1,000-year-old artifacts and sites of the first people to live in that area. One site along the Bering Sea contains a Yup’ik village <a href="http://www.adn.com/article/20140830/archaeologists-rush-save-yupik-treasures-threatened-vanishing-shoreline">frozen in thick layers</a> of permafrost. It now faces the threat of melting, exposing the delicately preserved village to the elements—a 30-foot area at the edge of the site has already been washed into the sea. And it’s not just the ancient past that’s under threat. Jamestown, Virginia, part of Colonial National Historical Park, faces a <a href="http://www.npr.org/2013/05/14/178809495/with-rising-seas-americas-birthplace-could-disappear">massive threat</a> from rising tides and rising water levels that might flood buried artifacts.</p><p>“Do we take them out and risk exposing them to the air, and potentially see more damage that way, or do we leave them in place?” Caffrey asks.</p><p class="shortcode-media shortcode-media-rebelmouse-image">
<img class="rm-shortcode" data-rm-shortcode-id="7dbc47a32984057b0c598cef56ef83b0" data-rm-shortcode-name="rebelmouse-image" id="a832c" type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8xOTg0MDk3Ni9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY0NDc5MDc4Nn0.h4y-tQJyrx6HUF4_bMZ-4svtrNTsNYI5Sgv1dlLzXvw/img.jpg?width=980"/>
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<small class="image-media media-photo-credit" placeholder="add photo credit...">Cape Hatteras Lighthouse. Image by Gilz via Wikimedia Commons</small>
</p><p>These questions—whether and how to save which sites—will become increasingly important as climate patterns shift, and archaeological sites begin to take the brunt of the climate blow. Even if we could figure out the exact impact of change for every important site, the nature of choosing what to protect—and how to do it—might be more of an engineering and economic problem than a scientific one. In 1999, the NPS decided to move the Cape Hatteras Lighthouse 1500 feet from the shoreline, at a <a href="http://www.nps.gov/caha/planyourvisit/chls.htm">cost of $11.8 million</a>. “The decision to relocate the Cape Hatteras Light Station was a sound public policy decision based on the best science and engineering information available,” the NPS writes. It’s not clear how many lighthouses will fall into a rising sea, but it’s unlikely we can move every single structure, let alone every broader archaeological site, that is at risk.</p><p>“This is the legacy we’re leaving for future generations,” Caffrey said. “We’re going to have to ask the tricky questions, of what ones do we try to save, or if we don’t save any at all, or whether or not some of these things eventually become monuments to climate change. Instead of having a lighthouse you can walk up to, maybe it becomes a submerged site that you can take a snorkel tour around and learn about climate change that way.”</p>
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