Eastern Alps may have been ice-free 5000 years ago 

Posted: December 22, 2020 by oldbrew in climate, Natural Variation, research
Tags:

Pasterze Glacier, Austria


Climate change occurs whether humans like it or not, always has done, and always will do. Attempting to control carbon dioxide levels can never be a solution to anything.
– – –
New research suggests that some Alpine glaciers were ice-free during the mid-Holocene warm period, when Earth’s climate was warmer than it is now, says New Scientist (via The GWPF).

Glaciers in the Ötztal Alps in Austria are currently melting and may be lost within two decades, but this might not be the first time humans have seen this kind of change.

A new analysis reveals that glaciers in this region formed just before or perhaps even within the lifetime of Ötzi the Iceman, a mummified body found just 12 kilometres away in 1991.

Pascal Bohleber at the Austrian Academy of Sciences in Vienna and his colleagues drilled 11 metres into the Weißseespitze summit glacier, down to the bedrock, at 3500 metres altitude and collected two ice cores.

They then used radiocarbon dating to analyse microscopic bits of organic material extracted from the ice cores and found that the glacier is 5200 to 6600 years old.

Ötzi is thought to have lived between 5100 and 5300 years ago, and his body was found preserved in ice.

The glacier’s age means it formed during a time called the mid-Holocene warm period, when Earth’s climate was warmer than it is now.

It is also dome-shaped, which Bohleber says is rare in the Alps and means that the ice has seen very little movement over time, meaning we can use it to study the climate when it formed.

Source here.

Comments
  1. Phoenix44 says:

    How did that get published in New Scientist?!

  2. oldmanK says:

    Paper here: https://www.nature.com/articles/s41598-020-77518-9

    From paper “Radiocarbon dating of the mummy indicated that the Iceman lived roughly 5.1–5.3 ka cal”. That is about the 3195bce event (an Eddy root), the Piora Oscillation.
    However that date refers to a major geological event. The cooling period had started earlier at 3550bce (obliquity > to low,). Paper says ” tree-ring-dated subfossil wood remains indicate that several advances occurred between 5.9 and 5.5 ka at three different glaciers in the Alps”. Eddy peak was around 5.8ky BP (the 5.9) and 5.5 (the 3550bce).

    What is missing is consideration for geological change, with possible abrupt uplift to account for fast freezing that eliminated body decay from residual body heat.

    Some extra: https://melitamegalithic.wordpress.com/2019/06/14/ask-otzi/

    The plot thickens!

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s