Alex Honnold Rappels The Moulin | Arctic Ascent with Alex Honnold | National Geographic 

drysuit companies aint sponsoring this video lol

and I'm so happy that he gave up climbing free solo.

Right! 🤯

Looked amazing. How much water is normal underneath a glacier? I know you can see plenty of glacial tracks on the rocks in Sweden and what direction the ice was going but what impact has the water on the underlying rock? Theoretically more water should leave rock smoother. Like the difference with fine grain sandpaper vs coarse sandpaper, if you know what I mean?

Why was it necessary to rappel down in order to deposit the piezometers? Thanks!

I couldn't believe the journey you went on up there! You should make a youtube video on things you learned.

very handsome, but not a 2x4.

So true!

Yes, you are right. But a lot more viewers will watch the video this way.

???

Please let me know if you need more info on the science we did during Arctic Ascent. We worked with 12 research instutes and performed 18 different experiments during the expedition :)

it was certainly pretty tricky. We wanted to make sure that the instruments were dropped in the right conduit, hence we had to rappel as far down as possible..

@@drheidisevestre Makes sense. Super dangerous but valuable info.

It’s really not sad at all. Earth will be covered in ice again one day don’t worry

Whether there are humans or not, that will still melt. Then after some millenia will freeze again, just a cycle.

really? u rather watch water become ice?lol the glaciers have been melting for the last 13000 years , there was 2km of ice over most of canada 8000 years ago

​@@jordanthoms887Scientists are probably more concerned about global warming and not the long term natural effects of melting ice.

@@storm2000808 lmao i love it, hilarious u know what happens when the globe warms? ICE MELTS! lol U know why ice melts, global warming u know these are two natural processes? our glaciers have expanded and melt 6 times over 400kpa also it wasn't long ago that our mega fauna died off, 6 ft beavers, mammoths, massive bison. These fauna made up the vast majority of our food sources. Than we lost it all, of our food sources, we were forced to adapt and grow crops, such adaptations lead us to be the most versatile and wide spread species in the world, oh how terrible global warming is u know when russia becomes a beard basket, canada becomes a fruit basket, alll of our northern regions ( where most of our landmass sits) turns from tundra to growable climates, yea real bummer climate change drives our adaption and changes as a species, we react to it, we are only in such a situation because we are in the longest interglaciation period we have experienced in our existence ( though we have gone thru many) so we should be basking and enjoying our time under the sun, dont let the fear mongers make u hate such a bountiful time of our existence, most of human history has been spent in the shadow of glaciers and exploring frigid wastelands

Hazel?? Where??

Titan is hard to beat…

This was child's play and a cake walk for Alex compared to free soloing El Capitan with no ropes.

Hi! This is a technique that is used quite often in the Arctic. We would not have done it if it had been too dangerous :)

@@drheidisevestre idk, I think the look on Alex's face at the end of the video after he discovers the amount of water flowing underneath of him explains it all lol. Everything is fine and dandy until you figure out you are on top of a river lol

@@nighttrain1565 yes it certainly us a loud and dynamic environment.

What sience that wasn't explained are you referring to?

the instrument she used for purportedly measuring depth. and what is the correlation between depth and the movement of an iceberg. nothing explained. @@freakyfridayfun

GIS student here, they used radiometry and multi spectral scanners to detect most of their data. Certain wavelengths of energy scatter when they hit objects, this scattering produces data we can use to create imaging information. Producing spectral data for moulins is important to glaciologists because the volume of the water beneath the glacier can determine the speed of the glacier’s basal drift. Basal drift is a key factor to glacial melt and sea level rise.

that was very informative and helpful. so I assume there are plenty of studies on the correlation between basal drift and water volume? thanks @@jontomassi

I think it is wonderful that people risk their lives for science.