Day 9: Last time into the wilderness
10:15 AM: I am very happy to announce that I did survive my night in the igloo. Not only that. I actually overslept (they had to wake us at 7:30) and missed breakfast and a skype session with the finance club. The temperature inside the igloo was -22 (but it was a dry -22.) Once you zip up into the sleeping bag with little more than a few square inches of face showing you get very comfortable very quickly. The ground gets covered with caribou skins to insulate. It is pitch black and completely quiet inside. I would recommend it greatly.

As noted above, today is our last venture into the field to collect Spruce samples. The temperature is currently about -52, which is just about the lowest point you can still go out and function relatively well. I will return this afternoon to update you.
Here is a picture of all the members of this expedition and our CNSC staff. Given the wind some opted to show as little face as possible.
I made it back from the field all in good spirits so let me try to answer some of the questions that have been posted to the best of my ability.
How often are you able to see these northern lights (if you are up late enough to be able to see them)? And how often are they supposed to be visible up there? They appear mostly from September through March. The peek time is about 11:30 PM to 2AM. They don't appear every night and the intensity and color changes tremendously. Obviously it has to be a clear night. We have been lucky and have had about 6 nights of some lights, 2 of which were very good. The aurora guy, Roger, up here gave them a 5 out of 10, but he has been chasing them his whole life. Below is a map of the current activity updated every three minutes. You can use that to predict the activity for the night. Go to www.spaceweather.com to check out the latest info.
So, since there are so many different types of snow, as New Yorkers, do we receive the different types, or does only the Artic have a variety? I don't think any given place has all 72 types, but NY does have a variety. The type of snow greatly depends on temperature, moisture, depth of pack and a few other . The bottom layers change as a result of the pressure and the temperature change. When you dig more than about 30 cm the temperature really starts to go up as you get closer to the ground. That is because the snow is a great insulator and keeps te thermal heat from escaping.
What is the average depth of the snow that you are working in, meaning how far down is it until you reach the soil? There really is no average depth. The one thing that determines the depth more than anything here is exposure to wind. On the open tundra is can be as little as 3 cm of icy snow and in the forest it reaches 3 meters of light and fluffy snow.

When you were observing the northern lights did you feel a temperature change when they first appeared in the sky and after they disappeared? I can't say I did. Remember though that it was minus 50 C last night and even a five degree increase or decrease would not be obvious. I will ask the resident aurora specialist if it does happen and get back to you.
Were the northern lights only yellow or were there other colors hidden in them that can not be seen in the pictures? What you see are mostly white, with slight tint of green and an occasional red. The camera shows color better than we can observe. There are some blue lights as well, but I have not seen any.




















