1 / 14

Hydrometeorological trends in eastern Canada

Hydrometeorological trends in eastern Canada. by D. Caissie and M. Thistle Fisheries and Oceans May 1-2, 2012 Institut Maurice-Lamontagne, Mont-Joli, QC. Introduction. Mean annual & seasonal air temperatures

jake
Download Presentation

Hydrometeorological trends in eastern Canada

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Hydrometeorologicaltrends in eastern Canada by D. Caissie and M. Thistle Fisheries and Oceans May 1-2, 2012 Institut Maurice-Lamontagne, Mont-Joli, QC

  2. Introduction • Mean annual & seasonal air temperatures • Data from Envrionment Canada (Adjusted and Homogenized Canadian Climate Data - AHCCD) • Annual & seasonal total precipitation • Data was also from AHCCD • Streamflow trend analysis • Peak and low flows (as defined by a 30-day mean) • Timing of peak and low flows • Ice conditions in rivers • Data from Environment Canada (HYDAT & CEHQ)

  3. Site Selection Criteria • Spatial distribution • Duration of record • Data quality • Close proximity of sites (e.g., AirT, P and Q)

  4. Selected Sites Air temperature (37) Total Precipitation (35) Rivers (42)

  5. Change in Annual Mean Temperature (oC/decade) > 1.0 0.6 – 1.0 0.3 – 0.6 0.0 – 0.3 No significant change Annual Air Temperature (60 & 30 years) 0.6-1.0°C 68% (25/37) 70% (26/37) 0.0-0.3°C A) 1951 - 2010 B) 1981 - 2010

  6. Annual Air Temperature (1900-2010) Change in Annual Mean Temperature 1900-2010 (oC/decade) 0.3 – 0.6°C 0.09 – 0.3°C < 0.09°C No significant change 87% (20/23) 0.09-0.3°C

  7. Change in Seasonal Mean Temperature 1951-2010 (oC/decade) > 1.0 0.6 - 1.0 0.3 – 0.6 0.0 – 0.3 No significant change B) Spring A) Winter A) Winter D) Autumn C) Summer C) Summer Air Temperature (1951-2010) Seasonal 27% (10/37) 14% (5/37) 54% (20/37) 87% (32/37)

  8. Air Temperature • The level of increase in annual AirT is greater in last 30 years (1981-2010) due to a cold period in late 80s and early 90s • On a seasonal basis, summer and autumn AirT showed more wide spread increases for both the 30 & 60 years period • Winter mean temperature did not significantly increased in 1951-2010; however did in 1900-2010

  9. Change in Total Annual Precipitation (percent change/decade) > 10 5 - 10 0 - 5 No significant change Total Precipitation (60 & 30 years) 29% (10/35) No clear seasonal pattern was observed A) 1951 - 2010 B) 1981 - 2010

  10. Change in Annual Average Flow (percent change/decade) >>10 >10 5 - 10 0 - 5 No significant change Mean Annual Flow (60 & 30 years) A) 1950 - 2009 B) 1980 - 2009

  11. Change in Seasonal Flow Extremes (percent change/decade) >>10% >10 5 - 10 0 - 5 No significant change Trends in Magnitude (1950-2009) 26% (11/42) 19% (8/42) Spring Maximum – 1950 - 2009 Summer Minimum – 1950 - 2009

  12. Change in Timing of Seasonal Flow Extremes (days/decade) 6 - 9 3 - 6 0 - 3 No significant change Trends in Timing (1950-2009) 42% (14/42) Spring Maximum – 1950 - 2009 Summer Minimum – 1950 - 2009

  13. Change in Annual Ice Days (days/decade) >>10 >10 5 - 10 0 - 5 No significant change Trends in Ice cover (1950-2009)

  14. Thank you ! Questions !

More Related