Snow cover

General Discussions: ASK John: Snow cover

By jim sted on Tuesday, December 11, 2007 - 04:23 pm: Edit Post

John,

Now that much of the midwest and upper midwest have snow cover, how does that effect, if at all, any climate changes/patterns or temps. I know that especially at night, it helps to keep temps down since the ground is covered and not able to give off any heat.

But do large regions of snow cover help to create additional snows or does it help in any way to fend off warmer air that may try to push into an area.

Just seems it's been awhile since we've seen such significant ground cover and I'm hoping there are some other future benefits as well since it is so early in the snow season.

Any thoughts? Thanks


By John Dee on Tuesday, December 11, 2007 - 06:33 pm: Edit Post

Jim-

About the only potential impacts will be that any cold air coming from the north will be modified (warmed) less. Snowcover is very good at allowing cold air to travel south without being warmed like bare ground might.

However, it will not keep warm air from moving north.

All of Hudson Bay is frozen over already. First time since 2002 that it has done this so early. Not sure what kind of an impact that will have, but just thought I would pass it a long.

-John


By jim sted on Tuesday, December 11, 2007 - 06:41 pm: Edit Post

Thanks John!


By Dane F on Tuesday, December 11, 2007 - 10:49 pm: Edit Post

John

If the Great lakes start to freeze over sooner that will effect the LES right??


By John Dee on Wednesday, December 12, 2007 - 04:36 am: Edit Post

Yep.

A frozen lake produces no lake effect.

-John


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