Integrating Spaceborne Observations of Greenhouse Gases and …cci.esa.int/sites/default/files/D1_S2_T5_Poulter.pdf · 2018-10-03 · Integrating Spaceborne Observations of Greenhouse
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Integrating Spaceborne Observations of Greenhouse Gases and Forest Structure to Estimate Land-Cover and Land-Use Change EmissionsBen Poulter1, Leo Calle2, Philippe Ciais3, George Hurtt4, Masa Kondo5, Lesley Ott1, and Prabir Patra6
1NASA, 2Montana State University, 3LSCE, 4University of Maryland, 5Chiba University, 6JAMSTEC
Acknowledgements
• Activities funded by:• NASA Carbon Monitoring System (CMS)• NASA Arctic-Boreal Vulnerability Experiment (ABoVE)• NASA Interdisciplinary Sciences (IDS)
• Data contributions from OCO-2, TRENDY Model Intercomparison, NASA GMAO
ESA Biomass Workshop, 9/25/18
Can we detect LULCC emissions from space?
ESA Biomass Workshop, 9/25/18
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Land-cover change (Song et al. 2018)
Burned area (Andelaet al. 2017)
XCO2
ESM
What is the role of LULCC in the Earth system?
ESA Biomass Workshop, 9/25/18
Accounting for LULCC emissions?
ESA Biomass Workshop, 9/25/18
Net LULUCC = (Wood harvest + Deforestation Fires + Soil Erosion + Committed Emissions [products, slash] + Legacy Emissions + Crop Harvest + Pasture Management) - Regrowth
Can GHG satellites be integrated with forest structure missions?• GHG satellites track column concentrations
• How to disaggregate flux to source/sink sectors?
• Types of LULCC emissions would impose ‘instantaneous’ signature• Deforestation fires• Deforestation (loss of C uptake, slow release)• Crop harvest (rapid switch in carbon cycle)• Crop burning
ESA Biomass Workshop, 9/25/18
Urba
n OC
O-2
XCO 2
anom
aly
Wild
fire
OCO-
2 XC
O 2an
omal
y
LULCC
Integrated RS LUCC system
ESA Biomass Workshop, 9/25/18
XCO2 Enhancement Land
Cover ChangeLand
Use
Deforestation Fires
Wood Harvest
Grass Management
Integrated RS LUCC system
ESA Biomass Workshop, 9/25/18
• LULCC hotspots are not monitored for CO2
Integrated RS LUCC system
ESA Biomass Workshop, 9/25/18
• Addressing scale and disaggregation of GHG signal
Sensitivity of XCO2 to Land Cover Change
• Simulation of LULCC processes• LPJml -> WH, shifting cultivation, GH, CH, legacy
emissions, wildfire• Land Use Harmonization version 2 (1700 to
2017)• Atmospheric transport using GEOS5 and
also with ACTM• MERRA2 and JRA55 Reanalysis wind fields used• 2 x 3.75 degree resolution
ESA Biomass Workshop, 9/25/18
Sensitivity of XCO2 to Land Cover Change
ESA Biomass Workshop, 9/25/18
Woo
d Ha
rves
t
Fore
st Lo
ss
1992
2017
1992
2017
ESA Biomass Workshop, 9/25/18
Sensitivity of XCO2 to Land Cover Change
Enhancement of XCO2, ppm, (difference of S3 – S2)• Seasonal effect due to legacy emissions?
Sensitivity of XCO2 to Land Cover Change
ESA Biomass Workshop, 9/25/18
Diff
eren
ce (K
gCm
-2)
19922017
Net land use change emissions simulated by LPJ
Summary• Can we combine forest structure and GHG remote sensing for LULCC
applications?• LULCC XCO2 enhancement observed in simulation environment, e.g., OSSE• Distinguish between types of LULCC fluxes (instantaneous vs committed)• Address scaling challenges of datasets, observational period, and extent• Work toward a methodology for statistical disaggregation of XCO2
enhancement constrained by land cover, biomass, land use remote sensing with an atmospheric model (beyond atmospheric inversion)
ESA Biomass Workshop, 9/25/18
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