Date post: | 26-Jan-2017 |
Category: |
Science |
Upload: | terrestrial-ecosystem-research-network |
View: | 90 times |
Download: | 1 times |
Fire is not FireThe next generation of TERN fire remote sensing datasetsPresentation by Stefan W Maier (Darwin Node Leader TERN/AusCover)
Continental coverageSpatial resolution 500mTemporal resolution 8 days4 algorithms (+1 for Victoria) #
2000 - now
Grassland Curing
# Martin et al. (2015)Integrating ground and satellite-based observations to determine the degree of grassland curingInternational Journal of Wildland Fire 24, 329-339
Resolution: 1x1km2 (NADIR), 5x2km2 (edge of swath)Sub-pixel fires get detected, ideal conditions 80-100m2 #
Sensitivity depends on view angle#
Approx. 4 observations per day, cloud permitting (more for higher latitudes, less closer to equator)2000 (2002) - nowFire Radiative Power included as attribute (≠ fire line intensity!)
Thermal Anomalies (Active Fire Detection)
# Maier et al. (2013)Sensitivity of the MODIS fire detection algorithm (MOD14) in the savanna region of the Northern Territory, AustraliaISPRS Journal of Photogrammetry and Remote Sensing 76, 11-16
Global product generated by NASA, TERN/AusCover reproject & mosaicSpatial resolution 500mMonthly compositesTwo algorithms (MCD45, MCD64)2000 (2002) – nowThree month latency
Burnt Area (NASA)
Continental coverageSpatial resolution 250mApprox. 2 observations per dayAustralian algorithmMonthly compositesAvailable 15th of following month2002 – nowShapefile, GeoTIFF, ERM, ENVI
Burnt Area and Approximate Day of Burn
Burnt Area and Approximate Day of Burn
fire stopped by creek
fire jumped creek
fire jumped creek
daily progression of fire
Continental coverageNumber of fires 1997 – 2011Spatial resolution 1x1km2
Minimum fire size 4km2
Input data: manual mappingusing AVHRR data
Fire Frequency
Maier & Russell-Smith (2012). Measuring and Monitoring of Contemporary Fire Regimes in Australiausing Satellite Remote Sensing. In Flammable Australia: fire regimes, biodiversity andecosystems in a changing world.
Qld coverageSpatial resolution 30mAnnual composite1987 - now
High Resolution Burnt Area
Continental coverageSpatial resolution 250mApprox. 2 observations per dayAustralian algorithmMODIS/Terra (AM) available within 2h, MODIS/Aqua (PM) available within 2 days
Near Real-Time Burnt Area
Fire is not Fire
Fire is not Fire
fire severity, fire patchiness
Northern Australia coverage (north of 21⁰S)Spatial resolution 250mMonthly composites + seasonal compositesAvailable 15th of following month2002 – now
Fire Severity
Edwards, et al. (2015). Measuring and Mapping Fire Severity in the Tropical Savannas. In Carbon Accounting and Savanna FireManagement. B. Murphy, A. Edwards, M. Meyer and J. Russell-Smith. Melbourne,Australia, CSIRO Publishing:169-181.
On-ground transects within fire perimeters:83% (EDS) / 93% (LDS) burnt87% (EDS) / 89% (LDS) of unburnt patches are ≤ 5m
Spatial Scale of Patchiness
Oliveira, et al. (2015). Ecological Implications of Fine-Scale Fire Patchiness and Severityin Tropical Savannas of Northern Australia. Fire Ecology 11, 10-31.
Fraction Pixel Burnt
on-ground sensor pixel
30%
70%
un-mixing
Continental coverageSpatial resolution 250mMonthly compositesAvailable 15th of following month2002 – now
Fire Sub-pixel Patchiness / Fraction Pixel Burnt
Fire Sub-pixel Patchiness (Example)
day-time fire
night-time fire
Fire Patchiness (Statistics West Top End)
Continental coverageSpatial resolution 250/500mMonthly compositesAvailable 15th of following month2002 – nowMODIS land bands 1, 2, 3, 4, 5, (6), 7 (VIS/NIR/SWIR)Pre- and post-fire reflectance for every fire affected pixel
Post-Fire Reflectance Change
[email protected]://tern.org.au/
http://www.auscover.org.au/http://data.auscover.org.au/xwiki/bin/view/Product+pages/
http://www.maitec.com.au/gallery/fire_animations/
Thanks!