Autumn 2007 was warmer and wetter than normal



    OTTAWA, Dec. 18 /CNW Telbec/ - The autumn of 2007 in Canada was neither
the warmest nor wettest on record but was still warmer and wetter than normal.
Information on the autumn weather-that-was is from Environment Canada's
Climate Trends and Variations Bulletin.
    The Bulletin provides a cross-country look at temperatures and
precipitation for the September to November, 2007 period and compares it to
climate data from the past 60 years. A 30-year average is used for a reference
period, and is referred to as a "normal".

    Highlights from The Climate Trends and Variations Bulletin for Canada
    include:

    
    - Autumn 2007 in Canada was the 19th warmest on record, since nationwide
      records began in 1948, with temperatures 0.7 degrees Celcius above
      normal (based on preliminary data). Most of the country experienced
      temperatures within one degree below and above normal, with only the
      high Arctic and Great Lakes areas having temperatures more than
      1 degrees Celcius above normal. The warmest autumn in Canada was
      recorded in 1998, with temperatures at 2.3 degrees Celcius above
      normal. The coolest autumn was recorded in 1986, with temperatures
      1.8 degrees Celcius below normal.
    - The climate region in Canada with the highest ranked above-normal
      temperature this autumn was recorded in the region covering southern
      Ontario and Quebec (+1.4 degrees Celcius, 5th warmest).
    - Nationally averaged seasonal temperatures have been at or above normal
      for more than 10 years.
    - Overall, this autumn was the 12th wettest on record in Canada, with
      precipitation at 9.7% above normal. There was considerable variation in
      regional amounts, both wetter and drier than the national average. The
      wettest autumn was in 1981, with precipitation 24.1% above normal. The
      driest autumn was in 1976 with precipitation 20.3% below average.
    

    The climate region covering most of the Northwest Territories (29.1%
above normal) and the region covering northern Ontario and Quebec (22.4% above
normal) both experienced their 4th wettest autumns.
    Because weather conditions can vary greatly from one year to the next due
to natural variability, it is difficult to attribute this past season's
weather to a specific cause. However, the warmer and wetter than normal
conditions are consistent with the types of changes that are expected to occur
in the Canadian Climate as a result of global human-induced climate change.

    To view the full bulletin, please visit:
www.msc-smc.ec.gc.ca/ccrm/bulletin/national_e.cfm

    (Egalement offert en français)




For further information:

For further information: Robert Whitewood, Climatologist, Climate Data
and Analysis, (416) 739-4378; Environment Canada Media Relations, (819)
934-8008, 1-888-908-8008


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