Radio Freethinker

Vancouver's Number 1 Skeptical Podcast and Radio Show

Posts Tagged ‘weather’

RFT Rant – Ep 240 – Why did it so cold?

Posted by Don McLenaghen on January 17, 2014

COLD 0

Now as many of our readers have noticed, climate change is a hoax…if you stepped outside at all last week you experienced temperatures that rival those found on frozen Mars.

No…but wait you say, it was not bad here in Vancouver…what are you talking about?

Well, that’s true, HERE it was okay but if you lived anywhere east of Alberta you experienced the same temperatures found on Mars…what..

<Again, wait you may ask, am I saying that Mars in winter is only -40?

No, no. But it’s cool if you think about it, that Mars during its summers are roughly the same temperature as our winters. In fact it can get up to 70 degree Fahrenheit or 20 Celsius, not bad for a summer day in Vancouver really. Actually, the average temperature on Mars is -50 Celsius…which is very cold for my birth city Brandon, but factoring wind-chill, not unheard of…that although it is millions of miles farther from the sun and a completely different planet, there is still overlap.

So, getting back on track, this cold weather must prove climate change is wrong.

weather_mealtalk

Yet again, you might interrupt and say something like “but climate is…well, climate and is described in long term trends. This cold snap was just that a snap…it’s what the technically minded call weather.”

So it seems that events such as these may actually support climate change…but not a single event. Weather is random but the frequency and average severity of climate events are predicted to increase as more energy is pumped into the atmosphere…i.e. global warming.

So, what caused this cold snap?

vortex-graphic

Well, to understand that we must first understand the jet stream…well, the polar jet stream. This is a band of fast moving air…or maybe river of air is a better analogy, which races around the planet between the northern temperate zone and the polar zone.

The zones are relatively stable air masses compared to the stream. As fall becomes winter and winter get cold, the air at in the polar zones get colder and colder…nothing new there.

However, the polar jet stream, like a river, will meander up and down. Think of a winding river viewed from a plane…now with a river the windiness is determined by the power of the river, this does have an analogy in the jet stream but a greater influence in what climatologist call the temperature gradient.

Cold polar air is denser and heavier that warmer air. This means that the amount of waviness of the jet stream is limited to the resistance it experiences to this difference in temperature between the zones.

However, as global warming raises relative temperatures in the artic and increased energy into the stream itself, the loops formed become more pronounced. That is the cold loops would, usually, only sweep south a little and warm loops north a little. As climate change becomes more pronounced, the loops exaggerate to the point where a loop will cut itself off in the Deep South.

polar-vortex-cartoon-polar-bear-598x535

By cut itself off, think of an eddy in a river. It’s now a circular rotating ball of super cold. Because, as earlier mentioned, cold air is heavier than warm, it smashes its way deeper and deeper south into the northern zone.

Thus you get New Orleans issuing wind-chill warnings, people in Atlanta freezing to death and well, fecking cold weather. It should be noted that although the east coast was blasted with cold, Alaska experienced a heat wave…well, for the middle of winter.

Some of the more interesting things that has rode the internet…there have been a lot of people who have been admitted to emergency departments because they saw a YouTube type video about boiling water turning into snow at these temperatures …it seems temperature is not the only factor in making snow… unfortunately when some of the viewers decided to test the theory they ended up with scalding burns to their skin, I can only imagine how they managed to boil their skin and not make snow.

Adding hype to the temperature claims, much ado has been made by the fact that the Chicago Zoo has kept its Polar Bear indoors…because its sooo cold, even polar creatures would freeze. Well, not really. It seems that as a polar bear living quote WAY south, well that this polar bear…seems there is only one, has very little insulative fat. Something not needed for a southern polar bear but something a polar bear in the wild would have…so it’s not that it is too cold even for polar bears…wild polar bears are fat and warm.

climate.weather

That said, I am not being a hypocrite. This was a weather event…they happen randomly. So, this no more proves climate change than the denialist say it disproves it. That said, after the fourth one this year…then I may get on my high horse.

Find out more:

Posted in Blogs, Don's Blogs | Tagged: , , , , , , , , | Leave a Comment »