making better decisions for aquatic resources in the ... decis… · making better decisions for...
TRANSCRIPT
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Making better decisions for aquatic resources in the Anthropocene
Adam Terando
Mitch Eaton
Dept. of Interior Southeast Climate Science Center
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Department of Interior Climate Science Center Network
DOI Secretarial Order 3289: Producing actionable science that helps individuals and organizations understand and adapt to global change.
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Department of Interior Climate Science Center Network
SECSC vision for science that “adds up”
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Characterize and understand the effects of climate change on fish, wildlife, and habitat
Provide research-based information to support landscape scale adaptive management decisions
Actionable Science @ DOI SE Climate Science Ctr. Implementing a decision-oriented project portfolio
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Formal problem deconstruction
The Decision Analytic Approach
1. Problem Framing
• Decision maker(s) & stakeholders• Values/objectives • Risk Attitudes• Alternative Actions
2. Consequences • Predictive Models
3. Identify Preferred Action
• Optimization• Trade-off analysis
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Formal problem deconstruction
The Decision Analytic Approach
1. Problem Framing
• Decision maker(s) & stakeholders• Values/objectives • Risk Attitudes• Alternative Actions
2. Consequences • Predictive Models
3. Identify Preferred Action
• Optimization• Trade-off analysis
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CONSIDERATION OF
NON-STATIONARY DYNAMICS
Sea-level rise and water resource managementCONSIDERATION OF NON-STATIONARY DYNAMICS IN DECISION-MAKING
USGS
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How do we manage a coastal wetland impoundment that must satisfy multiple competing objectives and address a changing climate?
OUR HYPOTHETICAL
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How do we manage a coastal wetland impoundment that must satisfy multiple competing objectives and address a changing climate?
OUR HYPOTHETICAL
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How do we manage a coastal wetland impoundment that must satisfy multiple competing objectives and address a changing climate?
OUR HYPOTHETICAL
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THE NEW REALITY
IPCC AR4 200711
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USGCRP – Draft NCA 2013
Already Seeing Big Changes12
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USGCRP – Draft NCA 201313
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Warmer climate means a wetter atmosphere
Wat
er v
apor
pre
ssur
e (m
b)
Temperature
Saturation vapor pressurees
16
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Larger percentage of precipitation has come in form of intense single day events.
Extreme One-Day Precipitation Events, Contiguous 48 States
Effects of Climate ChangeHeavy Precipitation
17
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Drought
Burke et al. 2006Chelcy Miniat, USDA Forest Service18
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River Discharge -An Example of Complex Interactions
tn.gov
19
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Leuzinger and Korner 2010, GCBLabat et al. 2004, AWRGedney et al. 2006, Nature
Streamflow
Simple Water Balance
Input – Output = Loss
Precipitation – Streamflow = Evapotranspiration
River discharge across the globe has been increasingat a rate of 4% for each 1°C increase in global temperature.
Chelcy Miniat, USDA Forest Service20
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Franks and Beerling 2009, PNAS
Evapotranspiration: Changes in Forest Leaves
With increasing size and decreasing density, stomatal conductance and transpirationalwater loss are reduced.
Chelcy Miniat, USDA Forest Service21
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Franks and Beerling 2009, PNAS
Evapotranspiration: Changes in Forest Leaves
Which means, discharge (i.e. streamflow) must increase.
Chelcy Miniat, USDA Forest Service
Simple Water Balance
Input – Output = Loss
Precipitation – Streamflow = Evapotranspiration
22
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Water availability could be a key concern
USGCRP – Draft NCA 201323
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Formal problem deconstruction
The Decision Analytic Approach
1. Problem Framing
• Decision maker(s) & stakeholders• Values/objectives • Risk Attitudes• Alternative Actions
2. Consequences • Predictive Models
3. Identify Preferred Action
• Optimization• Trade-off analysis
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Downscaling
“the process of making the link between the state some variable representing the large space and the state of some variable representing a much smaller space.” Benestad (2008)
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Pros – globally consistent, physically consistent, many parameters modeled,
Cons – computationally expensive, affected by errors in a GCM, must approximate the things that occur at a finer resolution (clouds, precipitation)
Statistical Dynamic
Pros – incorporate historical information, computationally inexpensive, flexibly crafted for specific purposes
Cons – assumes statistical relationships will be valid in the future, require a long observational record, affected by the errors in a GCM
Based on statistical relationships between regional and global scale
Based on physical relationships similar to those in the Global Climate Models
DOWNSCALING
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SERAP - HayhoeCLAREnCE10
Statistically DownscaledCCSM3A1FI Emissions Scenario
Dynamically DownscaledCCSM3A2 Emissions Scenario
Change in Average Total Precipitation
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Puerto RicoMean Annual Precipitation
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Puerto RicoMean Annual Precipitation
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GCMs can’t resolve island
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100 KM
Resolving Terrain is critical
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2 KM
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Formal problem deconstruction
The Decision Analytic Approach
1. Problem Framing
• Decision maker(s) & stakeholders• Values/objectives • Risk Attitudes• Alternative Actions
2. Consequences • Predictive Models
3. Identify Preferred Action
• Optimization• Trade-off analysis
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Formal Adaptive Management
System Model
Monitoring
System Model*
Learning Adapt
Action SHARPER
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Human use (agriculture and drinking water) and wildlife habitat
Maximize outflow for agricultural use Maintain minimum threshold of habitat for endangered sp.
Spring decision for water release
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WHICH HYPOTHESIS WILL BE CLOSEST TO THE ONE TRUE OBSERVED STATE?
FUTURE WATER DEMAND
DEALING WITH UNCERTAINTY
Martin et al., Climatic Change, 2011
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Evidence (observations) of which state is reality increases with time.
Martin et al., Climatic Change, 2011
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Adjust actions accordingly.
LEARN
Martin et al., Climatic Change, 2011
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ADAPT
LEARN
Martin et al., Climatic Change, 2011
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SMALL DIFFERENCES IN OCCUPANCY
THRESHOLD
Martin et al., Climatic Change, 2011
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LARGE DIFFERENCES IN WATER RELEASE
Martin et al., Climatic Change, 2011
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LOWER VALUE IF CLIMATE CHANGE IGNORED
Irrigation levels (at)
Water Units
Year
Site Occupancy
Proportion Occupied
Year
Martin et al., Climatic Change, 2011
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LOWER VALUE IF CLIMATE CHANGE IGNORED
Irrigation levels (at)
Water Units
Year
Site Occupancy
Proportion Occupied
Year
Forced water closures
Threshold violations
Martin et al., Climatic Change, 2011