During the past few decades melting glaciers have provided a window into the past, revealing habitations long lost under ice. What is also coming to light is that climatic conditions existed over a thousand years ago that produced temperatures at least as warm as present day. Of course, during that Medieval Warm Period, there was no human activity producing carbon dioxide that could have contributed to any warming or the cooling during the Little Ice Age that followed.
Retreating glaciers have yielded many sites of human
activity, even the remains of humans themselves that had lived and died before
the glaciers formed.
Ötzi the Iceman
One of the most impressive finds was the mummified body of Ötzi the Iceman, whose remains were
discovered in 1991 in the Ötztal
Alps on the border between Austria and Italy. He is believed to have lived more
than 5,000 years ago. An arrowhead buried in his shoulder, together with other
wounds and blood stains from other humans on his clothing, have led to the
interpretation that his death was a result of a fight.
Ötzi’s DNA indicates he may
have been part of the migration of early European farmers who migrated from
Anatolia to southern Europe in large numbers during the 7th millennium
For more information see Otzi the Iceman from the Alps.
Mendenhall Glacier, Alaska
One of the most important things that are revealed by
melting glaciers is the evidence of a warmer climate that predated the buildup
of ice that formed the glaciers. These environments were present within the
time frame of genealogical research. There recent exposure allows us to see
what living conditions were like prior to the advance of glaciers during the
Little Ice Age.
Beneath the Mendenhall Glacier in Alaska are the remains of
a verdant forest, with trees dated between 1,200 and 2,350 years in the past.
It won’t be surprising to learn that the area basked in a much warmer climate
centuries ago and would have been prime hunting territory for indigenous
peoples. The find is not unlike other similar discoveries under other melting
glaciers around the world. In this case these trees in growth position were
encased in gravel protecting them from the scouring effects of the advancing
For more information see Ancient forest thaws from melting glacial tomb.
Zeleny Yar, Siberia
Mummified remains found in graves in the Zeleny Yar area in
Siberia attest to a civilization that existed there between the 12th
and 13th centuries. The bodies were wrapped in thick textiles, fur
and tree bark and encased in copper plates. The wrapping and subsequent
permafrost that formed during the Little Ice Age preserved the remains.
What we are witnessing is not the only time that mountain
glaciers have expanded and then melted. Throughout much of the Dark Ages Cold
Period (400-900AD) mountain glaciers and northern ice packs grew substantially.
Then during the Medieval Warm Period they contracted, leading to the
establishment of new societies such as those that lived in Zeleny Yar.
Materials and artifacts found with the human remains will
eventually tell us more about the early society. Analyses of DNA extracted from
the bodies will tell us where they may have originated.
For more information see Medieval mummies of Zeleny Yar burial ground.
Lendbreen Pass, Norway
Lendbreen Pass is just one of dozens of locations in Norway
where artifacts, and even an abandoned settlement have been discovered that
demonstrate how people lived in the region during the centuries prior to the
Little Ice Age. This and other passes were open to traffic during both the
Roman Climate Optimum (250BC-400AD) and Medieval Warm Period (900-1300AD), as
it is becoming so today.
The pass was used between 1,300 and 1,700 years ago (Roman
Climate Optimum) and again around 1000 AD (Medieval Warm Period), at a time
when trade was active across Scandinavia and Europe. It is also possible that
local farmers used the pass to get to high pastures during the summer months.
For more information see Crossing the ice.
Revealing the Past
What these and many other examples demonstrate is that
glaciers are ephemeral in relation to the history of the Earth. What we can
observe today is a transition from a cold climatic period to a warm one. During
the last 10,000 years, that kind of change has happened at least a half-dozen
times. And, in the ancient past, humans often lived in much warmer times that
we do now.
During the Little Ice Age, glaciers advanced in every
mountain rage in the world. It should not be a surprise that they are now
retreating as the Earth’s climatic cycle once again turns to warmer
For genealogists, the importance of glaciers is not where they are today, that interest tourists, but where they were during the Little Ice Age when our ancestors lived, as they are direct indicators of climatic conditions.