It snowed in Edmonton (Alberta, Canada) today. It was a wet snow. Heavy to shovel, hard to drive in. Most residents are used to dry snow conditions so the accident rate went up.
During the winter salt is generally not used on Edmontons roads (a gritty sand mixture instead) as salt is not that effective in ten dgrees below zero centigrade. This is a quite common tempurature throughout our Northern winters.
The wet and slippery road conditions resulting from todays snowfall caused traffic havoc and many collisions resulted. Edmontonians are not used to these type of road conditions at this time of year
In the past eight winters it did not snow until after halloween for five of them. This year it snowed last week (wet snow) and again today.
Is this evidence of climate change?
For me, considering for example the first snowfall metric, the fact first snowfall was before Oct 31st for five years and four years it was after Oct 31st shows a balance (This is random not sequential years either).
In general throughout my life experience, weather patterns (spring, summer,winter ,fall) are relatively constant and predictable. Micro patterns within those seasons are not.
Are there more catastrophic weather events now as oppossed to thirty years ago. Based on the things I have heard reported and lived through myself, not at all.
So do I observe climate change, subjectively speaking – no. Does global warming exist and is climate change one of the results – objectively based on specific measures it appears to be the case.
Steve:
The climate has been changing since the earth formed. The earth has been both warmer and colder than it is now. The Minoan warm period was warmer and the Roman warm period, when they grew grapes in England, about as warm.
The debate is about human influence. On a local scale you can measure the urban heat island. On a global scale, no. The data does not support human influence beyond the normal variation in the climate.
There is a very good website that covers all aspects of this at:
http://www.wattsupwiththat.com
Steve
Thanks Steve, great site and good explanation. I have heard from a lot of people that there is evidence of global warming but I do wonder. My closing statement, about specific measures proving global warming (due to human intervention), is based on sites that do purport this to be the case that I have read but am unable to personally validate the veracity of. Again, your comments are welcomed and appreciated.