Changes

==Observed to date==

==Observed to date==

*IDF: Changing rainfall intensities affect stormwater runoff timing, peak rates and volumes; Methods have been relying on static IDF curves. Increased frequency of 12% and increase intensity of 16% of extreme precipitation events for 1958 - 2007 for the US Northeastern region <ref>Larson, L, Nicholas Rajkovich, and Clair Leighton. 2011. “Green Building and Climate Resilience: Understanding Impacts and Preparing for Changing Conditions.” University of Michigan, 260. http://scholar.google.com/scholar?hl=en&btnG=Search&q=intitle:GREEN+BUILDING+AND+CLIMATE+RESILIENCE+Understanding+impacts+and+preparing+for+changing+conditions#0.</ref>

*IDF: Changing rainfall intensities affect stormwater runoff timing, peak rates and volumes; Methods have been relying on static IDF curves. Increased frequency of 12% and increase intensity of 16% of extreme precipitation events for 1958 - 2007 for the US Northeastern region <ref name = Larson>Larson, L, Nicholas Rajkovich, and Clair Leighton. 2011. “Green Building and Climate Resilience: Understanding Impacts and Preparing for Changing Conditions.” University of Michigan, 260. http://scholar.google.com/scholar?hl=en&btnG=Search&q=intitle:GREEN+BUILDING+AND+CLIMATE+RESILIENCE+Understanding+impacts+and+preparing+for+changing+conditions#0.</ref>

*“Percent changes in the amount of precipitation falling in very heavy events (the heaviest 1 %) from 1958 to 2012 for each region. There is a clear national trend toward a greater amount of precipitation being concentrated in very heavy events, particularly in the Northeast US (71 %) and Midwest US (37 %).” <ref>Melillo, Jerry M, T C Richmond, Gary W Yohe, and US National Climate Assessment. 2014. Climate Change Impacts in the United States: The Third National Climate Assessment. US Global Change Research Program. Vol. 841. https://doi.org/10.7930/j0z31WJ2.</ref>

*“Percent changes in the amount of precipitation falling in very heavy events (the heaviest 1 %) from 1958 to 2012 for each region. There is a clear national trend toward a greater amount of precipitation being concentrated in very heavy events, particularly in the Northeast US (71 %) and Midwest US (37 %).” <ref>Melillo, Jerry M, T C Richmond, Gary W Yohe, and US National Climate Assessment. 2014. Climate Change Impacts in the United States: The Third National Climate Assessment. US Global Change Research Program. Vol. 841. https://doi.org/10.7930/j0z31WJ2.</ref>

*“As for the temporal trends, significant warming trends are detected throughout the province of Ontario and the overall trend in annual mean temperature varies largely between 0.01 and 0.02 °C year^–1. Increasing trends in annual rainfall (by 1 – 3 mm/year) and total precipitation (by 1 – 4 mm/year) are detected at the vast majority of gauged stations, but no significant trends in annual snowfall are identified at most of the stations.”<ref>Wang, Xiuquan, Guohe Huang, and Jinliang Liu. 2016. “Observed Regional Climatic Changes over Ontario, Canada, in Response to Global Warming.” Meteorological Applications 23 (1):140–49. https://doi.org/10.1002/met.1541.</ref>

*“As for the temporal trends, significant warming trends are detected throughout the province of Ontario and the overall trend in annual mean temperature varies largely between 0.01 and 0.02 °C year^–1. Increasing trends in annual rainfall (by 1 – 3 mm/year) and total precipitation (by 1 – 4 mm/year) are detected at the vast majority of gauged stations, but no significant trends in annual snowfall are identified at most of the stations.”<ref>Wang, Xiuquan, Guohe Huang, and Jinliang Liu. 2016. “Observed Regional Climatic Changes over Ontario, Canada, in Response to Global Warming.” Meteorological Applications 23 (1):140–49. https://doi.org/10.1002/met.1541.</ref>