Subscribe: RSS Podcast iTunes
  Buy WotD Stuff!!
Episode 419      

featured Wiki of the Day Episode 420

For current episodes, or for the rest of the Wiki of the Day family of podcasts go here.

      Episode 421

Ice drilling
Fri, 2018-Jun-29 00:21 UTC
Length - 2:38


Welcome to featured Wiki of the Day where we read the summary of the featured Wikipedia article every day.

The featured article for Friday, 29 June 2018 is Ice drilling.

Ice drilling allows scientists studying glaciers and ice sheets to gain access to what is beneath the ice, to take measurements along the interior of the ice, and to retrieve samples. Instruments can be placed in the drilled holes to record temperature, pressure, speed, direction of moveassment, and for other scientific research, such as neutrino detection.

Many different methods have been used since 1840, when the first scientific ice drilling expedition attempted to drill through the Unteraargletscher in the Alps. Two early methods were percussion, in which the ice is fractured and pulverized, and rotary drilling, a method often used in mineral exploration for rock drilling. In the 1940s, thermal drills began to be used; these drills melt the ice by heating the drill. Drills that use jets of hot water or steam to bore through ice soon followed. A growing interest in ice cores, used for palaeoclimatological research, led to ice coring drills being developed in the 1950s and 1960s, and there are now many different coring drills in use. For obtaining ice cores from deep holes, most investigators use cable-suspended electromechanical drills, which use an armoured cable to carry electrical power to a mechanical drill at the bottom of the borehole.

In 1966, a US team successfully drilled through the Greenland ice sheet at Camp Century, at a depth of 1,387 metres (4,551 ft). Since then many other groups have succeeded in reaching bedrock through the two largest ice sheets, in Greenland and Antarctica. Recent projects have focused on finding drilling locations that will give scientists access to very old undisturbed ice at the bottom of the borehole, since an undisturbed stratigraphic sequence is required to accurately date the information obtained from the ice.

This recording reflects the Wikipedia text as of 00:21 UTC on Friday, 29 June 2018.

For the full current version of the article, go to http://en.wikipedia.org/wiki/Ice_drilling.

This podcast is produced by Abulsme Productions based on Wikipedia content and is released under a Creative Commons Attribution-ShareAlike License.

Visit wikioftheday.com for our archives, sister podcasts, and swag. Please subscribe to never miss an episode. You can also follow @WotDpod on Twitter.

Abulsme Productions produces the current events podcast Curmudgeon's Corner as well. Check it out in your podcast player of choice.

This has been Joanna. Thank you for listening to featured Wiki of the Day.


Archive:
  Episodes 1-100    Episodes 101-200    Episodes 201-300    Episodes 301-400    Episodes 401-439  

Feedback welcome at feedback@wikioftheday.com.
These podcasts are produced by Abulsme Productions based on Wikipedia content.
They are released under a Creative Commons Attribution-ShareAlike 3.0 Unported License.

Creative Commons License

Abulsme Productions also produces Curmudgeon's Corner, a current events podcast.
If you like that sort of thing, check it out too!


Page cached at 2018-07-18 08:33:43 UTC
Original calculation time was 0.3960 seconds

Page displayed at 2018-07-18 20:14:48 UTC
Page generated in 0.0004 seconds