Manitoba s Future Climate
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1 Climate Change Connection: Severe Weather in MB Workshop, 2 April 2013 Manitoba s Future Climate Danny Blair Associate Dean of Science, University of Winnipeg Professor of Geography Co-Chair, MB s Climate Change dannyblair.uwinnipeg.ca climateguy@gmail.com
2 Many people around the world now realize that their climates are no longer normal.
3 2000 England and Wales Wettest autumn on record since Germany Highest daily rain since at least Europe Hottest summer in at least 500 years 2007 Greece Hottest summer on record since Australia Heatwave breaks many long records 2010 Russia Hottest summer since Pakistan Worst flooding in history 2010 E. Australia Highest December rainfall since France Record hot/dry spring since N.E. USA Wettest Jan-Oct on record since S. USA Most extreme Jul. heat/dry since W. Europe Wettest summer on record since Japan 72-hour rainfall record 2011 Rep. of Korea Wettest summer on record since Canada Souris-Assiniboine River Floods
4 Extremes 2012 Arctic Lowest sea ice cover on record 2012 Antarctic Highest sea ice cover on record 2012 Canada Record high temps in March 2012 Canada/U.S. Record winter drought in many areas 2012 United States Hottest year on record in lower United States Hottest summer on record in lower Canada Hottest summer on record 2012 Europe Many areas record hottest summer 2012 United States Drought breaks many long records 2012 Russia, Ukraine + Drought raises food prices 10% 2012 United States Hurricane Sandy kills ~200; ~$70B 2012 Greenland 97% of surface was melting in July 2012 Eurasia Extreme cold spell in Jan/Feb 2012 S. Philippines Rare Super Typhoon kills 100s in Dec 2012 NE Brazil Extreme drought worst in 5 decades 2012 Africa Floods in Jul-Oct affects >3 million 2013 Australia Record heat wave in January 2013 Australia Hottest summer on record (Dec-Feb) 2013 Canada Record highs in Yukon, Edm. in Jan.
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6 2011/12: 3 rd Warmest Winter ( )
7 2012: Warmest Summer ( )
8 2012: Warmest Year on Record for U.S. Canada: 3 rd Warmest ( )?
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10 March 2012 Difference from Normal
11 Winnipeg March Mean Temperatures 2013
12 Global Climate is Warming NASA: 2010 was tied for warmest year on record 2011 was 9 th warmest 2012 was ~tied for 9 th Anomalies relative to
13 Yes, there is much variation within the global
14 Major volcanic eruptions cool the planet for a few years Through Jan El Niño warms the planet for ~2 yrs; La Niña cools for ~2 yrs
15 Record Warmth In Recent Years Even though solar irradiance was very low ~11-year (132-month) sunspot cycle Carbon dioxide forcing is about 1.5 W/m 2 and growing (~0.3 W/m 2 per decade) Data through Jan
16 Why is the global temperature rising?
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18 The Keeling Curve ppm Data through Dec
19 Glacial-Interglacial Ice Core Data We have excellent estimates of ancient carbon dioxide concentrations from bubbles extracted from ice cores.
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22 Conclusion from our understanding of how climates changed in the past and current changes: Humans now control the global climate. James Hansen and grandchildren James Hansen:
23 IPCC CO 2 CONCENTRATION SCENARIOS A1F1 A2 A1B B2 B1 Currently ~394 ppm Socio-economic and geophysical models are used to make projections about future carbon dioxide (and GHG) concentrations.
24 Alas: None? There are few signs that we are going to substantially slow down our carbon emissions any time soon.
25 Alas: There is no quick fix. It is very unlikely that we will be able to prevent substantial warming.
26 Decay of Fossil Fuel CO 2 Emission 33% of CO 2 remains in air after 100 years 19% remains in air after 1000 years
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28 Conclusion: The entire climate system changes as well, not just the temperature. There are many signs that the system is changing.
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30 What changes in temperature and precipitation are projected for our region?
31 Update coming soon Canada s most recent assessment of climate change impacts and adaptation, region by region.
32 Prairie Grassland Region: 2050s Spring Wetter & Warmer
33 Climate Trend Mapper Free! at climate.uwinnipeg.ca
34 Spring Avg. Temperature Trend
35 Prairie Grassland Region: 2050s Summer Drier? & Warmer
36 Summer Avg. Temperature Trend
37 Prairie Grassland Region: 2050s Fall Wetter? & Warmer
38 Fall Avg. Temperature Trend
39 Prairie Grassland Region: 2050s Winter Wetter & Warmer
40 Winter Avg. Temperature Trend
41 Annual Avg. Temperature Trend
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51 RCP = Representative Concentration Pathway
52 Use average of 16 of the latest climate models to estimate changes in PRECIPITATION and changes in the DIFFERENCE BETWEEN PRECIPITATION AND EVAPOTRANSPIRATION. Comparing to Uses RCP8.5.
53 Change in PRECIPITATION: Fall Months
54 Change in PRECIPITATION: Winter Months
55 Change in PRECIPITATION: Spring Months
56 Change in PRECIPITATION: Summer Months
57 Change in PRECIP-ET: Fall Months
58 Change in PRECIP-ET: Winter Months
59 Change in PRECIP-ET: Spring Months
60 Change in PRECIP-ET: Summer Months
61 Climate normals are dead: The averages are changing rapidly The climate is becoming more variable The past is no longer a good surrogate for the future
62 Science: 1 Feb 2008 Stationarity the idea that natural systems fluctuate within an unchanging envelope of variability is a foundational concept that permeates training and practice in water-resource engineering. It implies that any variable (e.g., annual streamflow or annual flood peak) has a timeinvariant (or 1-year periodic) probability density function (pdf), whose properties can be estimated from the instrument record.
63 Of Concern: The amount of nonstationarity that will be present in the future is unknown Also unknown: what we do not know
64 Donald Rumsfeld: "We know there are known knowns: there are things we know we know. We also know there are known unknowns: that is to say we know there are things we know we don't know. But there are also unknown unknowns the ones we don't know we don't know." 12 February 2002
65 Planning and preparing is important: Forecasting extreme events is especially important and difficult The most important events are the extremes
66 Released March
67 IPCC 2001
68 Number of Days with Temperature Exceeding 30 C
69 Warming leads to more evaporation More evaporation increase intensity and duration of drought Clausius Clapeyron equation Warmer air also holds more water vapour (7% more per +1 C) More water vapour will create more precipitation (with favourable weather patterns) More atmospheric moisture provides more latent heat for storms
70 Overall, the evidence indicates a likely increase in observed heavy precipitation in many regions in North America, despite statistically non-significant trends and some decreases in some sub-regions. This general increase in heavy precipitation accompanies a general increase in total precipitation in most areas of the [country]. The largest trends toward increased annual total precipitation, number of rainy days, and intense precipitation.were focused on the Great Plains/northwestern Midwest. Chapter 3
71 There will be benefits: Longer growing season More heat for growing More crop/garden choices Improved yields Longer warm-fun season Warmer winters
72 There will be many risks: More extreme heat events More cooling requirements More severe storms More winter rain hazards More weeds and pests More social stress Shorter cold-fun season
73 There will be many risks: More frequent droughts More intense droughts Longer droughts More extreme rain events Continued spring floods A more variable climate More climate surprises
74 You should: Anticipate impacts on your activities & services Anticipate demand for your activities & services Make the case for change Develop and implement a plan that has resilience
75 Climate Change Connection: Severe Weather in MB Workshop, 2 April 2013 Manitoba s Future Climate Danny Blair Associate Dean of Science, University of Winnipeg Professor of Geography Co-Chair, MB s Climate Change dannyblair.uwinnipeg.ca climateguy@gmail.com
76 Climate Projections for Southern Manitoba: Executive Summary Annual Mean Temperature Winter Mean Temperature Spring Mean Temperature Summer Mean Temperature Fall Mean Temperature Variable Projected Change Confidence +1 to +3 C by 2050 Very High +3 to +5 C by 2050 Very High +1 to +2 C by 2050 Very High +1 to +2 C by 2050 Very High +1 to +2 C by 2050 Very High Maximum Temperatures Warming slower than means Very High Minimum Temperatures Warming faster than means Very High These are summaries of the overall projected trends as reported in From Impacts to Adaptation: Canada in a Changing Climate 2007 (2008); The New Normal: The Canadian Prairies in a Changing Climate (2010); IPCC s Climate Change 2007: The Physical Science Basis (2007); and other select sources compiled by D. Blair.
77 Climate Projections for Southern Manitoba: Executive Summary Variable Projected Change Confidence Warm-season heat waves Warmer and more frequent Very High Heat extremes Warmer and more frequent Very High Cooling-degree days Much higher Very High Heating-degree days Much lower Very High Growing-degree days Much higher Very High Frost-free season Much longer Very High Mid-winter thaws Warmer and more frequent Very High Winter-cold snaps Shorter and less frequent Very high Snow cover season Much shorter Very high Length of winter season Much shorter Very high Winter freeze-thaw cycles More frequent Low Cold nights Warmer and fewer Very high These are summaries of the overall projected trends as reported in From Impacts to Adaptation: Canada in a Changing Climate 2007 (2008); The New Normal: The Canadian Prairies in a Changing Climate (2010); IPCC s Climate Change 2007: The Physical Science Basis (2007); and other select sources compiled by D. Blair.
78 Climate Projections for Southern Manitoba: Executive Summary Variable Projected Change Confidence Annual precipitation Modest increase Medium Winter precipitation Substantial increase Very High Spring precipitation Increase Medium Summer precipitation Lower Low Fall precipitation Increase Low Winter rain events Many more Very high Snow storms Fewer Medium Droughts More and longer High Intense rain events More and more intense High Days with rain/snow? Low Days without rain/snow? Low Surface water amount Less Medium These are summaries of the overall projected trends as reported in From Impacts to Adaptation: Canada in a Changing Climate 2007 (2008); The New Normal: The Canadian Prairies in a Changing Climate (2010); IPCC s Climate Change 2007: The Physical Science Basis (2007); and other select sources compiled by D. Blair.
79 Climate Projections for Southern Manitoba: Executive Summary Variable Projected Change Confidence Wind speed? Low Wind extremes Higher Medium Wind erosion Higher Low Cloud cover? Low Sunshine? Low Relative humidity? Low Summer severe weather More Medium Lightning More Medium Tornadoes More Medium Surface water temperature Higher Very high Carbon dioxide Higher Very high These are summaries of the overall projected trends as reported in From Impacts to Adaptation: Canada in a Changing Climate 2007 (2008); The New Normal: The Canadian Prairies in a Changing Climate (2010); IPCC s Climate Change 2007: The Physical Science Basis (2007); and other select sources compiled by D. Blair.
80 Climate Projections for Southern Manitoba: Executive Summary Variable Projected Change Confidence Year to year variability Higher High Climate extremes Higher High Spring flooding More frequent Low Local summer flooding More frequent High Very wet summers More frequent Low Very dry summers More frequent Medium Very hot summers More frequent High Very wet winters More frequent High Very cold winters Much less frequent Very high Positive impacts Some, decreasing with time Very high Negative impacts Many, increasing with time Very high These are summaries of the overall projected trends as reported in From Impacts to Adaptation: Canada in a Changing Climate 2007 (2008); The New Normal: The Canadian Prairies in a Changing Climate (2010); IPCC s Climate Change 2007: The Physical Science Basis (2007); and other select sources compiled by D. Blair.
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