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Antarctic conservation

2 Posts tagged with the nacreous tag
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The world is your oyster

Posted by Conservators Aug 13, 2012

Author: Stefan

Date: August 8th  2012

Temperature: -37.5 deg C

Wind Speed: 5 knots

Temp with wind chill: -45 deg C

Sunrise: n/a

Sunset n/a

 

It was extremely difficult for me to get my head around just exactly how the transition of the seasons work down in Antarctica, but I guess the best way you could describe it is:

 

• 24hr constant sunlight

• 3-4 weeks of ambient light (without seeing the sun) getting shorter everyday

• 24hr constant darkness, with some illumination from the moon, when clear

• 3-4 weeks of ambient light (without seeing the sun) getting longer every day, and with a great deal of illumination from the moon.

 

.Sunrise.jpg

First sun of the season on the Hut, 26th August, 1911

 

Now, learn’d folk reading this, will be saying “yeah! obvious…derrrr”, but until you experience that mixture of tiredness, confusion, and firsts, trust me, the events of everyday, come as a bit of a shock. Just the other day, four of us watched a huge fiery golden globe rising over the horizon, although we knew it was the moon, it didn’t stop us asking each other over and over “it’s definitely not the sun, right?”

 

N-Cloud1.jpg

Nacreous Clouds forming over Mt Erebus

 

Equal to the aurora’s, nacreous clouds unfurl in the sky like smudges of diesel, making you feel like you’re inside a huge opalescent mussel shell, (indeed the word is derived from ‘nacre’ or mother of pearl).

 

I’ve never really had any time for solstice events but the joy of seeing the light on the snow here does place you in tune with all of your thoughts, and a real sense of time passing, life changing. Looking over Mt Erebus and seeing the light emission of the swirling pinks and violets, there is a desperation to be naive to all you’ve learned of science and to see it as a cauldron of magic, that will soon spill over and bring only good.

 

It’s nice to think that the explorers would have begun their long hauling seasons with this fever of positivity in their veins.

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Nacreous clouds

Posted by Conservators Aug 24, 2011

Author: Julie
Date: 18/8/11
Temperature: -33 C
Wind Speed: 12
Temp with wind chill: -48 C
Sunrise: 11:52
Sunset: 14:10

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Nacreous clouds at 10 am. Julie/AHT

 

Yesterday was the day of spectacular nacreous clouds.  Nacreous clouds are wispy clouds that form under certain specific conditions (very cold temperatures at very high altitudes) and that can appear iridescent when the angle of the sun is very low, as it is now at Scott Base.  If you do a web search for images of nacreous clouds, many of the images you will see were taken from locations near Scott Base on Ross Island.

 

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Nacreous clouds at 2 pm: not photoshopped, I swear. Julie/AHT

 

For the last week or so, as the sun has come closer to rising, we have been in prime nacreous cloud viewing conditions.  Nearly every day Sarah or Jane says, “go look out the window at the clouds,” and I run over to a window to see what we’re getting.  However, yesterday topped everything we have seen so far, and in fact topped everything most people at Scott Base have ever seen.  Pretty much as soon as a strip of light appeared at the horizon (at a respectable 9:13 a.m.), the Scott Base staff started making cloud announcements over the base-wide p.a. system.  I remember Jana saying at about 10 a.m., “Scott Base, Scott Base, look at the clouds above,” and Steve, at about noon, saying, “Scott Base, Scott Base, if you’re not looking at Erebus right now, you probably should be.”  At around 2 p.m., Sarah, who was supposedly in a meeting at that point, made the announcement: “Scott Base, Scott Base, the clouds are green.”  Before darkness hit at 4:39 p.m., I personally had taken 93 photographs of clouds.

 

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Nacreous clouds at 3 pm. Sarah/AHT