climate change and adaptation€¦ · • adaptation – what we can do… • mitigation as it...
TRANSCRIPT
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Climate Change and Adaptation
A discussion in Port McNeill
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CLIMATE TRENDS– what can we expect globally, regionally, locally?
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Climate Trends Global Circulation Models and Downscaling
Mathematical representation of global climate system (the physics) – takes global climate and is downscaled for interpretation – e.g. Climate WNA
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Climate Trends
Natural Variation
Source: Millar 2003
Climate the bigger picture
Earth’s natural climate system varies over time
Climate changes over time with different patterns and modes.
Modes are nested in annual, decadal, century and millennial scales
Note: Different mechanisms drive different modes
Decade scale
Century scale
Millennium scale
Years before present
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5Sources: IPCC http://www.ipcc.ch/publications_and_data/ar4/syr/en/figure-3-1.html http://www.ipcc.ch/publications_and_data/ar4/syr/en/figure-1-1.html
Climate Trends
Scenarios – IPCC From the Fourth Analysis Report
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6Sources: http://www.ipcc.ch/report/ar5/wg1/#.UkXFTzJrbGg
Climate Trends
IPCC Representative Concentration Pathways
These scenarios provide a range of concentrations over timeThe RCP 2.6 is a mitigation strategy – where CO2 peaks then declines by 2010
RCP 4.5 and 6 are stabilization scenarios, while RCP 8.5 is a scenario with increasing greenhouse gas emissions.
The RCPs can thus represent a range of 21st century climate policies, as compared with the no-climate-policy of the Special Report on Emissions Scenarios (SRES) used in the Third and Fourth Assessment Report..
From the Fifth Assessment Report
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7Sources: http://epa.gov/climatechange/basics/facts.html
Climate Trends
Global observations and impacts
For each ~1 degree C increase expected impacts include:
5 to 15% reductions in crops as currently grown
3 to 10% increases in the amount of rain during heaviest events
5 to 10% decreases in some rivers
200 to 400% increases in wildfire in parts of Western North America
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8Source: Tongli Wang et al 2012
Climate Trends
Shifts of climate envelopes
Note: This is one representation at the zonal level using BC analogues
Current 1961-2000 2001-2010
2011-2040 2041-2070 2071-2090
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9Source: http://www.kootenayresilience.org/Report5_BioclimateShift_Final.pdf
Climate Trends
Shifts of climate envelopes
West Kootenay 2080 output - possible climate from outside BC
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10http://www.pacificclimate.org/tools-and-data/plan2adapt
Climate Trends
Use of Plan2Adapt
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Shorter access season where winter access requires frozen road• Winter logging season will likely decrease• More logs may need to be stockpiled for break-up
Opportunities for facilitated migration of tree species• Increased growing season and changing frost dates• Southerly species may be more suitable
Warmer and shorter cold season• Increased growing season for some commodities• Heating costs in cold season may decline
Earlier spring lake ice melt.• Lake productivity may decline• Inland fisheries, sport fisheries and related tourism affected• Salmon smolt migration timing may be affected
Climate Trends
Output from Plan2Adapt – list of impacts
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12Source: Tongli Wang et al 2012 http://www.genetics.forestry.ubc.ca/cfcg/ClimateBC40/Default.aspx
Climate Trends
Climate BC map
2010 vs 2050
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• Temperatures will increase.
• Growing seasons will get longer.
• Nature and timing of precipitation will change.
• Pests and diseases will increase or become more severe.
• Frequency and size of natural disturbances will change across the landscape.
• Drier soils later in the growing season.
From: Generalities in USDA GTR NRS‐87 2012 p2
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Climate Trends
Plausible futures
Virtually Certain
Very Likely
Likely
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Climate Trends
TemperaturePCIC summaries http://www.pacificclimate.org/resources/regional-climate-summaries
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• ADAPTATION – WHAT WE CAN DO…
• MITIGATION AS IT RELATED TO RESOURCE MANAGEMENT– E.g., Avoid carbon emissions from fossil fuels, fire, mortality, and
conversion in a thoughtful manner. Promote healthy resilient ecosystems that will sequester carbon.
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Climate Change Terminology
Adaptation and Mitigation
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• Some sources of uncertainty are quantifiable, – particularly as climate observation networks improve.
• Nonetheless, uncertainty is not the same as incorrect information, nor does it mean we know too little to act”.
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http://www.ukcip.org.uk/wordpress/wp-content/PDFs/Risk.pdfClimate adaptation: Risk, uncertainty and decision-making UKCIP Technical Report May 2003
Considering Uncertainty
Risk, Resilience and Uncertainty
http://andrewmedia.dyndns.org/Dartnell/images/risk_matrix.gif
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The Bell Curve
From a presentation by Dr Mel Reasoner
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The Bell Curve
Low HighAverage
Probability ofoccurrence
2430
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21
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Increase in Mean Temperature
Cold HotAverage
HistoricalClimate
Probability ofoccurrence
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Less cold weather
HistoricalClimate
New Climate
More hotweather
Cold HotAverage
More Record hotweather
Increase in Mean TemperatureProbability of
occurrence
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More hot weatherMore cold
weather
Increase in Variance
Cold HotAverage
HistoricalClimate
New Climate
More recordcold weather
More recordhot weather
Probability ofoccurrence
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Increase in Mean Temperature & Variance
Cold HotAverage
HistoricalClimate
Probability ofoccurrence
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Less changeIn coldweather
Cold HotAverage
HistoricalClimate
New Climate
Much more hot weather
and record hot weather
Increase in Mean Temperature & VarianceProbability of
occurrence
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The Data
0.1 – 0.2 % 4 – 13 %
Average Annual Temperature has Increased Over the Last Century
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“Prediction is very difficult, especially about the future.”
Yogi Berra
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“Continued emissions of these gases will cause further climate change, including substantial increases in global average surface temperature and important changes in regional climate.”
“Detailed analyses have shown that the warming since 1900 is mainly a result of the increased concentrations of CO2 and other greenhouse gases.”
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Observed Emissions and Emissions Scenarios
The IPCC has been associated with four generations of emission scenariosEmissions tracking the higher scenarios
Main periods of use: SRES (2000–2012), RCPs (2012+)Source: Peters et al. 2012a; CDIAC Data; Global Carbon Project 2013
Emissions from fossil fuels and cement
2013
7
15
22
29
37
44
51
58C
O2
emis
sion
s (G
TCO
2)