"I am the Way, the Truth, and the Life"
Father God, thank you for the love of the truth you have given me. Please bless me with the wisdom, knowledge and discernment needed to always present the truth in an attitude of grace and love. Use this blog and Northwoods Ministries for your glory. Help us all to read and to study Your Word without preconceived notions, but rather, let scripture interpret scripture in the presence of the Holy Spirit. All praise to our Lord and Saviour Jesus Christ.
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Saturday, September 8, 2012
Norwegian scientists have documented a rapid melting of Arctic sea ice http://www.bbc.co.uk/news/world-europe-19508906. If it continues, it is liable to affect global weather patterns, and may already have. What might it mean for western
Researchers have determined that more and more sea ice is melting in the
every summer, and some of the ice that is not melting is thinner than in
decades past. Thinner ice – once the snow has melted – allows sunlight to get
through to the water below where some of the energy is absorbed resulting in
warming. That warming results in more thinning of the ice, which results in
more warming, which results in… well, you get it.
Between the thinner ice and the ever increasing amount of open water, the Arctic waters are warming and are likely to continue warming at an accelerating pace. The consequence of this is that the temperature differential between the
Arctic and the equatorial region is decreasing, at least
during late summer and fall before the Arctic sea ice reforms.
Why is that important? Well, that difference in temperature is what produces the major jet streams of the northern hemisphere. Jet streams determine where weather systems travel and how fast, and they affect the development of storm systems. They also affect where a ridge of high pressure may form, how intense it may become, and how long it may last.
So what about western
climate? I’m very reluctant to hazard a guess as to the effects on high
pressure ridges over western Canada although I suspect that we will see more
ridges meaning warmer and drier weather in late summer and fall. Also, the
decreasing temperature differential from the Canada Arctic
to the equator will mean weakening jet streams. Weakening jet streams should
result in fewer and weaker storm hitting the coast of in the fall months. BC
While it is not unusual for storms to hit the BC coast every 24-36 hours in the fall (often with little or no break between), this frequency should slow down, as should the intensities, meaning less rain and longer breaks between storm systems.
and the prairies
it may mean a reduction in precipitation in the fall months. Since not a lot of
precipitation falls on the prairies during the fall, it should not have a major
These effects, however, are only for the months when the sea ice has melted or is thin. Consequently, by late fall or early winter conditions should return to normal.
In my observances of the climatology of BC, it appears that this effect has already been felt for some time. September and October have become warmer and drier than in decades past, and while November used to be the wettest month in southwest BC, in recent decades that has moved to December. I wouldn’t be surprised to see it move to January in the next few decades.