Temperature Inversions
By greenthumb
16 comments
Here in the far north where long nights of subzero temperatures become the norm, we also feel the effects of hill country inversion. Temperature inversions trap the heavier, colder air in lower elevation pockets, reducing the air circulation and thickening it, like another layer of ice. Air circulation above these pockets can reach the hillsides and their temperatures continue to rise and fall. This inversion can lead to almost separate climates for periods in higher and lower elevations. I’ve got a few photos from a recent temperature inversion. The hills are breezy and pleasant and the sun has melted off all the snow on the tree branches. Lower elevation is still under a still blanket of cold, frost slowly accumulating on everything above the snow.
I thought it was very interesting, and really hadn’t looked at this phenomena very closely. I just knew they said the air was bad now and then. This is also why things will winter over in a hillside garden very differently than in mine, here in the same town. I’m on the north face and get all the cold breezes when the inversion starts and ends.
- 26 Dec, 2009
- 12 likes
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Comments
Thank you Arlene, Best wishes to you for the New year! :-)
As for the cold, I can understand, but I just see nice warm hills here. lol.
26 Dec, 2009
yes it is a strange phenomenon. But the sunshine looks so good.....
best of luck for 2010.
26 Dec, 2009
That looks so odd GT....We have inversions here too but they usually result in days of thick fog stuck in the valley (where I am). It's nice to see the sun on the hills.
Best wishes for the New Year.
26 Dec, 2009
We have inversions too..the air is not so bad here but we can see a haze over the Mountains when it happens...with the water here ...we tend to have the backward effect of warmer air lower..which does seem backward
26 Dec, 2009
such a great photo to explain.....hope u enjoyed the sunshine...we had a lovely sunny christmas day...
26 Dec, 2009
I remember Mr MB and I staying in St Anton in Austria in January many years ago. The village was in the shade all day and the temperatures were so low you did not wear earrings as they could have frozen in your ear. Up on the ski slopes in the sun it was a different world. Mr MB and I were not there for the skiing but the walking but we headed up and then walked in glorious sun and, even though it was well below freezing, it felt warm.
26 Dec, 2009
Thanks for the comments. I did see the sun for Christmas though just for a moment. :-)
Gilli, We'll get a fog if it lasts a long time and especially if the temp is below -40. None is moisture, it is all pollutants caught in the pool, we haven't the moisture to make a real fog very often in winter. This was just the start of this one, cold lifting everywhere but in the valleys.
Seems your condition is more common, Cat. It does have to be pretty cold for a while to reverse it. Inversions in Montana or Idaho growing up where always warm air trapped in the valley. We go through some flipflopping before the cold sets in like this.
Moongrower, Isn't it amazing what the sunshine can provide, you can feel your cheeks melt in the sunshine at -20. My porch will suddenly melt off in february when the sun returns to shine.
26 Dec, 2009
That's very interesting. I live in a hilly area and I often see frost or mist accumulating in the valley bottoms.
27 Dec, 2009
I guess you mut be use to this cold weather all the best for the new year and i'm sure you cannot wait for warmer temperatures to do some planting
27 Dec, 2009
Thanks for such an interesting blog.
27 Dec, 2009
Lovely photos Greenthumb and thank you for explaining the phenomena.Dont mind frost so much its icy winds such as we are having this afternoon which are difficult. Happy New year to you !
27 Dec, 2009
So interesting, thank you , Happy New Year to you.
27 Dec, 2009
Interesting pictures as always Greenthumb,I always look forward to your photos of Alaska. I have just been looking at Delononix1 pics of desert plants, and then click on to yours of snow and ice; this is one of the joys of GOY.
Happy New Year to you!
28 Dec, 2009
Wow what a interesting photos, I'm very sheltered where I live, Very rarely get so much as a mist although we did have snow for the first time in several years.
How much of the year do you have wintry weather, is it the usual 3 months or is it extended?
Sandy
7 May, 2010
8 months frozen here Sandy. At least 7 of them with snow. It can be very cold.
8 May, 2010
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~ I don't know how you manage in those conditions GT!
I hope you had a lovely Christmas day and best wishes for a great 2010!
26 Dec, 2009