Second generation of adjusted precipitation and homogenized temperature datasets for Canada: impact of adjustments and new challenges
The second generation of long term and homogenized temperature dataset contain 336 stations; more then 120 new locations are added to the original datasets. Recently, new procedures have been developed to address the redefinition of the climatological day in 1961 which generated a bias in the monthly and annual means of the daily minimum temperatures. The bias is more pronounced in the eastern regions of the country during the fall and winter. Non-climatic steps due to station relocation, change in instrument exposure, etc. were also detected using newly developed techniques and adjustment procedures.
The impact of adjusting precipitation and temperature datasets will be discussed for different locations in Canada.