challenges for global mapping of burned areas: experiences ... · emilio chuvieco, university of...
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![Page 1: Challenges for Global Mapping of Burned Areas: Experiences ... · Emilio Chuvieco, University of Alcalá (Spain) On behalf of the Fire_cci consortium. M. Lucrecia Pettinari, Joshua](https://reader030.vdocument.in/reader030/viewer/2022040617/5f1d0e7ac2dfc06753139513/html5/thumbnails/1.jpg)
LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Challenges for Global Mapping of Burned Areas: Experiences from the
ESA Fire-CCI Project Emilio Chuvieco, University of Alcalá (Spain)
On behalf of the Fire_cci consortium
M. Lucrecia Pettinari, Joshua Lizundia, Aitor Bastarrika, Ekhi Roteta, Kevin Tansey, Marc Padilla, James Wheeler, Jose Miguel Pereira, Duarte Oom, Manuel Campagnolo, Thomas
Storm, Johannes Kaiser, Angelika Heil, Florent Mouillot, Vanesa Moreno, Chao Yue, Philippe Ciais, Pierre Laurent, Guido van der Werf, Ioannis Bistinas, Philip Lewis, Jose
Gómez Dans, James Brennan
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Ward et al., 2012
Global fire impacts
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
GCOS: ECV
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
ESA CCI Programme
• ESA contribution to GCOS.• Generation of temporal series of ECV.
Aerosol cci Cloud cci
Fire cci
GHG cci
Glaciers cciLand Cover cci
Ocean Colour cci
Ozone cci
Sea-level cci Sea Ice cci Sea Surface Temperature cci
Ice Sheets cci
CMUG
Soil moisture cci
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Project development (2010-2018)
• Definition of user requirements (climatecommunity).
• Product specifications.• Development of BA algorithms.• Global processing (MERIS, MODIS-250m).• Small Fire Database for Africa (S-2/S-1, 20m).• Product validation• Product assessment (climate users).
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
User requirements
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
BA product specifications
• Pixel product: o Monthly files, continental tiles, GeoTiff
format:o 4 Variables: Day of detection (1-366),
Confidence level (0-100), Burned land cover (derived from LC_cci), Sensor detecting.
• Grid product: o 15-day global files at 0.25 x 0.25 degree.
NetCDF format.o 23 variables: total burned area, standard
error, fraction of burnable area, fraction of observed area, number of patches and burned area of each land cover.
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Global burned area processor
• Global algorithms need to be… global:o Include all different BA conditions.o Robusts: insensitive to data input problems.o Stable throughout time within a sensor.o Stable among sensors.
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
¿What is a burned area?
• A vegetated area.• … that changes to char /
ash.• …that has frequently a
hot-spot.• … and it is surrounded
by other BA patches.
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
But a burned area …
• May be dry or greenbefore the fire.
• May include or notscorched and greenleaves.
• May have unburnedislands
• May last < 15 days or >1 year.
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
BA algorithms for Fire_cci
• Optical sensors: MERIS, MODIS, LTDR, OLCI and SLSTR (S-3), MSI S-2:o Hybrid algorithms: changes in reflectance, guided
by hotspots.o Local-adapted (spatial thresholds).o Two-phase: seeds + growing phase.
• Radar: S-1o Changes in backscatter coefficient.o Changes in phase (interpherometry).
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Fire_cci v5.0 (2001-2017) (based on MODIS 250m data)
15 day periods
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Fire_cci BA v5.0:Standard error
(01-15/07/2016)
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Fire_cci BA v5.0:Number of burned patches
(01-15/07/2016)
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Fire_cci BA v5.0:Fraction of observed area
(01-15/07/2016)
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Fire_cci BA v5.0:Fraction of burnable area
(01-15/07/2016)
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Fire_cci BA v5.0:BA in Tree cover
(01-15/07/2016)
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Fire_cci BA v5.0:BA in Grasslands
(01-15/07/2016)
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Fire_cci BA v5.0 Average burned area
Chuvieco et al., 2018, ESSD
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Seasonal trends
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Intercomparation: Fire_cci v4.1 – GFEDv4
Chuvieco et al., 2016, GEB
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Validation sample
Padilla et al., 2017
Padilla et al., 2015
2008: 130 sites statistically selected. Sampling intensity in each
stratum proportional to BA extent
2003-2014 1200 sampling units, 100
each year over Sampling intensity in each
stratum proportional to BA extent
Minimum 2 units in each stratum
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Validation results:
Chuvieco et al., 2018, ESSD
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Fire_cci and MCD64A1 products
Siberia 2006: Fire_ccicorrectly identifies BA data that were missed by MCD64A1
Humber et al., 2018
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Emission comparisons (v3.1)
Burned area (Mha yr-1)
CO emissions(TgCO yr-1)
Carbon emissions (PgC yr-1)
GFED4 data set 346 258 1.6ORCHIDEE – GFED4 346 329 2.0ORCHIDEE – Prognostic 232 346 2.0ORCHIDEE – Fire_cci 369 351 2.1GFED3.1 data set 346 334 1.9
Chuvieco et al., 2016, GEB
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Climate assessment: patch shape analysis (Fire_cci v5.0)
Chuvieco et al., 2018, ESSD
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
Small Fire Databases
• Africa (2016): o Primary source: Sentinel-2 MSI data:
complemented by MODIS HS and S-1 in cloudy regions.
• Amazonia (2017):o S-1 data.
• Indonesia (2015-16):o S-1 data.
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
BA detected by MSI is much higher than current global products
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
BA detected by MSI is much higher than current global products
Roteta et al., 2018, RSE
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
SFD: Comparison of emissions with global products
• S2 shows 37% more emissions than GFED4s and 56% more than GFED4.
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LC/LUC) South/Southeast Asia, 28-30th May, 2018, Philippines
SFD S-1: Indonesia 2015
Lohberger et al., 2017