By Federico Cornetto
A brave explorer has climbed his way through an ancient glacier and filmed the amazing blue hue hidden at the ice’s core.
Joel Chang, from Singapore, was on a climate change expedition to learn about the loss of glaciers in Iceland, when he found himself scaling between two walls of what looks like pure water.
With his waist secured to a rope that reaches to the top of the crevasse, Joel uses his picks to break the blue wall and propel himself upwards.
As the camera closes in to the wall, you can see the intense, deep glow and the wrinkly look of the ice, like that of a water surface moved by the wind.
Joel said: “The older the ice, the more compressed and denser it is, and this makes it look blue due to the light spectrum passing through it.
“Ice inside crevasses tends to be much denser and more compressed than surface ice, therefore the blue hue.
“When we descend into most glacier crevasses we essentially descend into thousands of years in our planet’s past and the atmospheric conditions of that time, like the temperature and CO2 in the air, is all locked in this old ice.
“Scientists do this by drilling into the ice and extracting ice cores and examining the air bubbles sealed in them.”
A passionate and skilled climber, Joel is also a climate change advocate, and learning about the melting of ice was the main reason behind his trip to Iceland.
He said: “Coming from a tropical city island in the equator this trip was extremely educational for me.
“I learned and witnessed first-hand the horror of the increasing rate of ice retreat that is happening in Iceland, Greenland and at the polar caps.
“The ice teaches us that the amount of CO2 in our air now and since the industrial revolution has broken every single fluctuation peak in the past 800,000 years.
“Our ice stores 70% of our fresh water supply and it’s fast disappearing, we are facing imminent mass extinction of polar animals and all evidence points to human intervention causing such rapid climate change.”