coastal blue carbon...riches in the soil –the wetland carbon bank capitalizing on coastal blue...
TRANSCRIPT
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Capitalizing on Coastal Blue Carbon
Tonna-Marie Surgeon RogersWaquoit Bay National Estuarine Research Reserve
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Outline
An Introduction to Blue Carbon
OVERVIEW – Bringing Wetlands To Market (BWM) Project & Results
Using BWM Science & Tools – How Can We Capitalize on Blue Carbon?
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Our Changing Climate
Capitalizing on Coastal Blue Carbon | NH Climate Summit 2015 3Source: NOAA NCDC
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Our Changing Climate
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“If the world is to decisively deal with climate change every source of emissions and every option for reducing these
should be scientifically evaluated and brought to the international community’s attention.”
Report: Blue Carbon – The Role of Healthy Oceans in Binding Carbon, UNEP (2009)
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Addressing The Problem
Reduce Carbon Production
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Store More Carbon
Or BOTH
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Distribution of Carbon in Coastal Ecosystems
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0 500 1000 1500 2000 2500
All Tropical Forests
Oceanice Mangroves
Estuarine Mangroves
Tidal Salt Marsh
Seagrasses
Mean soil organic carbon Mean living biomass
Source: Data summarized in Crooks et al., 2011; Murray et al., 2011
tCO2e per Hectare, Global Averages
7
Soil-Carbon Values for First Meter of Depth Only (Total Depth = Several Meters)
5.1 ± 1.4 tCO2 /hal/ yr
0.2 ± 0.1 tCO2 /hal/ yr
8.0 ± 0.9 tCO2 /hal/ yr
8.0 ± 1.4 tCO2 /hal/ yr
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Riches in the Soil – The Wetland Carbon Bank
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0 200 400 600 800 1000 1200
Mean soil organic carbon Mean living biomassSource: Data summarized in Crooks et al., 2011; Murray et al., 2011
tCO2e per Hectare, Global Averages Soil-Carbon Values for First Meter of Depth Only (Total Depth = Several Meters)
TIDAL SALT MARSH
ALL TROPICAL FORESTS
8.0 ± 1.4 tCO2 /hal/ yr
0.2 ± 0.1 tCO2 /hal/ yr
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Coastal Blue Carbon is…..
The greenhouse gases (GHGS) sequestered by, stored in and released by coastal marine ecosystems such as salt marshes,
seagrass beds, mangroves and other tidal wetlands.
A newly recognized ecosystem service of coastal wetlands for climate change mitigation.
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How Well Do Coastal Wetlands Sequester Carbon?
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Coastal Wetlands Under Threat……Impact on Blue Carbon??
Sea level rise
Storms
Temperature increase
Nutrient loading
Land use conversion
Tidal restriction
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©BarbaraHarmon.com
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DEGRADING OR DESTROYING WETLANDS CAN RELEASE YEARS OF STORED CARBON BACK INTOTHE ATMOSPHERE…..INCREASING GHG EMISSIONS!
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Emissions from One Drained Wetland:Sacramento-San Joaquin Delta
Area under agriculture 180,000 ha
Rate of subsidence (in) 1 inch
3-5 million tCO2/yrreleased from Delta
1 GtCO2 release in c.150 years
4000 years of carbon emittedEquiv. carbon held in 25% of California’s
forests
Accommodation space: 3 billion m3
Slide courtesy Steve Crooks, ESA
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NEED TO BETTER UNDERSTAND GHG FLUXES AND CARBON STORAGE IN COASTAL WETLANDS
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BRINGING WETLANDS TO MARKET: NITROGEN AND COASTAL BLUE CARBON PROJECT (BWM)
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Acknowledgements:
• USGS – Kevin Kroeger, Meagan Gonneea
• Marine Biological Laboratory – Jianwu (Jim) Tang
• Univ. of Rhode Island – Serena Moseman-Valtierra
• Florida International University – Omar Abdul-Aziz
• Manomet Center for Conservation Sciences – Tom Walker
• Restore America’s Estuaries – Steve Emmett-Mattox, Steve Crooks
• Other project contributors from all partner organizations
• Many state and local stakeholders
• NERRS Science Collaborative
• National Estuarine Research Reserve Association
• Waquoit Bay National Estuarine Research Reserve Staff
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Why We Did This Work - State of Our Coastal Wetlands
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DRAMATIC LOSS• 50 % of US wetlands lost since 1800s•Historic Loss >> 1, 496,079 acres•Annual restoration rate ~ 1 % of goal
• 0.7 – 7% global habitat loss –unsustainable!
BENEFITS• Carbon Storage•Habitat • Filter Pollutants• Recreation/Aesthetics• Storm Protection
BARRIER TO RESTORATION
$$$$
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PHOTO: CHUCK MARTINSEN
Why We Did This Work -Nitrogen Loading An Important Local Issue
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BWM Research Questions
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BWM In A Nutshell
20
Innovative Science
GHG Budgets
Environmental Drivers
Habitat Relationships
Field Investigations &
Lab Analyses
Predicting C Storage
For a selected wetland, can we
predict GHG flux and carbon storage change under
different conditions?
Develop User-Friendly Model
Carbon Markets & Financing
Can we use blue carbon to generate
financing and investment for
wetlands restoration & conservation?
Wetlands Carbon Offset Methodology
Economic Analysis
Is it worth doing a carbon market
project?
Local Case Study –How much are
methane benefits potentially worth?
Address Important Science Gaps Develop New Tools for Managers and Policymakers
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COLLABORATION WITH END USERS
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SUMMARY RESULTS
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Summary Findings - GHG Relationship with Plant Zones
• CO2 uptake was higher in low marsh vs. high marsh zone. Surprisingly it was the greatest in the invasive Phragmites zones.
• Pools with bare standing water, where plants had died were sources of CO2 rather than sinks indicating that SLR may threaten carbon storage functions of salt marshes.
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GHGs
GHGs
-1215
-1,104
31 +/- 12
GHGs
-316
Zonation patterns for Net GHG Fluxes in Sage Lot (Waquoit Bay) (mg CO2eq. m-2 h-1)
Slide courtesy S. Moseman-Valtierra
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Key Findings – GHG Budgets and Nitrogen Impacts
• The studied salt marsh is acting as a significant carbon sink. Methane and nitrous oxide fluxes are small when compared to CO2.
• For the range of N loading (1-10 gN m-2y-1) examined no significant change was observed in the GHG fluxes or carbon storage. However, salt marsh GHG emissions may be significantly changed when N loading increases to a threshold level.
• N2O fluxes are not significant in tested marshes, but adding N may result in high N2O fluxes.
• Higher belowground biomass were found at the high N loading sites, but not seen for aboveground biomass.
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CO2 fluxes across N gradient
0 50 100 150 200 250 300 350 400
Flu
x (
mol
m-2
s-1 )
-20
-15
-10
-5
0
5
10NEP GPP R
Hamblin Pond
DOY
0 50 100 150 200 250 300 350 400-20
-15
-10
-5
0
5
10
NEP GPP R
Flu
x (
mol
m-2
s-1 )
Great Pond
DOY
0 50 100 150 200 250 300 350 400-20
-15
-10
-5
0
5
10
NEP GPP R
Flu
x (
mol
m-2
s-1 )
Eel Pond
DOY
0 50 100 150 200 250 300 350 400-20
-15
-10
-5
0
5
10
NEP GPP R
Flu
x (
mol
m-2
s-1 )
Low N
High N
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Above- and belowground biomass
High N High N
Low N Low N
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There is no difference in carbon burial across the nitrogen gradient within Waquoit Bay.
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0
50
100
150
200
250
0 2 4 6 8 10 12 14
Car
bo
n b
uri
al 1
95
0-p
rese
nt
(g m
-2y-1
)
Nitrogen load (g m-2 y-1)
High Marsh
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N2O emissions vs marsh nitrogen load
0
50
100
150
200
250
300
0 50 100 150 200 250
nm
ol N
2O
m-2
h-1
N load (g N m-2 y-1)
Waquoit Bay, MA
Narragansett Bay, RIPasseonkquis Cove
Ave
rage
Fal
l 2
01
2 N
2O
em
issi
on
s
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Slide courtesy: S. Moseman-Valtierra
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Adding time:11:50-11:55 am High tide started Marsh platform was flooded
Short-term N addition experiment: N2O flux response to 1.4 gN/m2
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IMPACT OF SEA LEVEL RISE - WHAT IS THE FATE OF BLUE CARBON?
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Accumulation rates are increasing in all marshes.
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Rates in 1900 were 1-2 mm/year.Modern rates are 3-5 mm/year.
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Carbon burial has increased since 1900 due to higher accumulation rates, not increased soil carbon content.
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Sea Level Rise and Carbon Storage
• Observed marshes are responding better than anticipated to SLR especially given that they have low sediment supply. Marsh position has stabilized in the tidal frame suggesting that marsh growth has accelerated in response to sea level rise.
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Serve as a tool to aid tidal wetland restoration and maintenance projects
Reduces the cost of wetland C and GHG flux monitoring by estimating
them from climatic and environmental drivers
The model can predict wetland GHG fluxes and C sequestration under
various IPCC climate change and sea level rise scenarios
BWM User – Friendly Model
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Photosyntheticallyactive radiation
Soil temperature
Soil salinity
Water depth relative to the
marsh elevation
Model Inputs
Model Outputs
Predicted instantaneous wetland CO2 and CH4
fluxes
Net CO2 and CH4
fluxes over the growing period
Net Ecosystem Carbon Balance (NECB)
gC/m2 and metric ton C/hectare
Model Structure and Work-Flow
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METHODOLOGY TO ENABLE CARBON FINANCING
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Goals• Carbon finance for restoration• Ecologically appropriate• Scientifically credible• Meet requirements of stringent
GHG standards• Broadly applicable to restoration• Flexible in its use• Practicable
Tidal Wetland and Seagrass Restoration Methodology
Slide courtesy: Steve Emmett-Mattox
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Habitats – all tidal wetlands and seagrasses, globally• Marshes, all salinity ranges• Mangroves• Seagrasses• Forested tidal wetlands
Eligible Activities• Restoration via enhancing, creating and/or managing
hydrological conditions, sediment supply, salinity characteristics, water quality and/or native plant communities.
Submitted to the Verified Carbon Standard• Final approval expected this summer
Slide courtesy: Steve Emmett-Mattox
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Policy Applications of Blue Carbon
• Federal Level – NOAA asked where could blue carbon into existing environmental policies Clean Water Act, Natural Resources Damage Assessment, Coastal
Zone Management Act, and National Environmental Protection Act
Decided that integrating blue carbon considerations should be done
Could result in more habitat conservation and climate mitigation benefits
President’s priority agenda for Enhancing Resilience of America’s Natural Resources now includes managing and enhancing of U.S> carbon stocks as a priority
Sutton-Grier et al. 2014. Marine Policy and Pendleton and Sutton-Grier et al. 2013.
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State Level Applications of Blue Carbon
• California’s Global Warming Solutions Act
• Massachusetts – GHG Accounting Project
• Ecosystem Valuation Project – New Hampshire
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Different Pathways to Capitalize
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COASTAL BLUE
CARBON
Wetlands Restoration
& Conservation Coastal
Resilience /Green
Infrastructure
Climate Change
Mitigation &
Adaptation
Regulations
Land Use Planning Decisions
Research
Education & Outreach
Ecosystem Services
Valuation
Policy
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It’s Not Just About Blue Carbon….ALL Ecosystem Services
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Healthy Resilient Coastal Ecosystems……Might Surprise Us!
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Capitalizing on Coastal Blue Carbon | NH Climate Summit 2015
“If the world is to decisively deal with climate change every source of emissions and every option for reducing these
should be scientifically evaluated and brought to the international community’s attention.”
Report: Blue Carbon – The Role of Healthy Oceans in Binding Carbon, UNEP (2009)
44
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Thank you!
Learn more at: www.waquoitbayreserve.org
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The Colors of Carbon
BLUE CARBON
Carbon stored in marine ecosystems (e.g. salt marshes and seagrasses)
GREEN CARBON
Terrestrial carbon stored in plants and soils (e.g. forests and agricultural lands)
BROWN CARBON
Greenhouse gases from burning of fossil fuels
BLACK CARBON
Particles from impure combustion (e.g. soot and dust)
Capitalizing on Coastal Blue Carbon | NH Climate Summit 2015 46