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The amount of carbon released from peat and forest fires in Indonesia during 1997


Tropical peatlands are one of the largest near-surface reserves of terrestrial organic carbon, and hence their stability has important implications for climate change1,2,3. In their natural state, lowland tropical peatlands support a luxuriant growth of peat swamp forest overlying peat deposits up to 20 metres thick4,5. Persistent environmental change—in particular, drainage and forest clearing—threatens their stability2, and makes them susceptible to fire6. This was demonstrated by the occurrence of widespread fires throughout the forested peatlands of Indonesia7,8,9,10 during the 1997 El Niño event. Here, using satellite images of a 2.5 million hectare study area in Central Kalimantan, Borneo, from before and after the 1997 fires, we calculate that 32% (0.79 Mha) of the area had burned, of which peatland accounted for 91.5% (0.73 Mha). Using ground measurements of the burn depth of peat, we estimate that 0.19–0.23 gigatonnes (Gt) of carbon were released to the atmosphere through peat combustion, with a further 0.05 Gt released from burning of the overlying vegetation. Extrapolating these estimates to Indonesia as a whole, we estimate that between 0.81 and 2.57 Gt of carbon were released to the atmosphere in 1997 as a result of burning peat and vegetation in Indonesia. This is equivalent to 13–40% of the mean annual global carbon emissions from fossil fuels, and contributed greatly to the largest annual increase in atmospheric CO2 concentration detected since records began in 1957 (ref. 1).

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Figure 1: Study site in Central Kalimantan, Borneo, Indonesia (location see inset; bar 600 km).

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  1. Houghton J. T. et al. Climate Change 2001: The Scientific Basis (ed. Houghton, J. T.) (Cambridge Univ. Press, Cambridge, 2001)

    Google Scholar 

  2. Page, S. E. & Rieley, J. O. Tropical peatlands: a review of their natural resource functions with particular reference to Southeast Asia. Int. Peat J. 8, 95–106 (1998)

    Google Scholar 

  3. Sorensen, K. W. Indonesian peat swamp forests and their role as a carbon sink. Chemosphere 27, 1065–1082 (1993)

    Article  ADS  Google Scholar 

  4. Rieley, J. O., Ahmad-Shah, A. A. & Brady, M. A. Tropical Lowland Peatlands of Southeast Asia (eds Maltby, E., Immirzi, C. P. & Safford, R. J.) 17–53 (IUCN, Gland, Switzerland, 1996)

    Google Scholar 

  5. Page, S. E., Rieley, J. O., Shotyk, W. & Weiss, D. Interdependence of peat and vegetation in a tropical peat swamp forest. Proc. R. Soc. Lond. B 354, 1–13 (1999)

    Google Scholar 

  6. Watson R. T. et al. Land Use, Land Use Change and Forestry (ed. Watson, R. T.) (Cambridge Univ. Press, Cambridge, 2000)

    Google Scholar 

  7. Barber, C. V. & Schweithelm, J. Trial by Fire – Forest Fires and Forestry Policy in Indonesia's Era of Crisis and Reform (World Resources Institute, Washington DC, 2000)

    Google Scholar 

  8. Siegert, F., Rücker, G., Hinrichs, A. & Hoffmann, A. Increased fire impacts in logged over forests during El Niño driven fires. Nature 414, 437–440 (2001)

    Article  ADS  CAS  Google Scholar 

  9. ADB (Asian Development Bank)/BAPPENAS (National Development Planning Agency) Causes, Extent, Impact and Costs of 1997/98 Fires and Drought Final Report, Annex 1 and 2, Planning for Fire Prevention and Drought Management Project (Asian Development Bank TA 2999-INO Fortech, Pusat Pengembangan Agribisnis, Margueles Pöyry, Jakarta, Indonesia, 1999).

  10. Fuller, D. O. & Fulk, M. Burned area in Kalimantan, Indonesia mapped with NOAA-AVHRR and Landsat TM imagery. Int. J. Remote Sens. 22, 691–697 (2001)

    Article  ADS  Google Scholar 

  11. Bowen, M. R., Bompard, J. M., Anderson, I. P., Guizol, P. & Gouyon, A. Forest Fires and Regional Haze in Southeast Asia (eds Eaton, P. & Radojevic, M.) 52–66 (Nova Science, New York, 2000)

    Google Scholar 

  12. Bompard, J. M. & Guizol, P. Land Management in South Sumatra Province, Indonesia. Fanning the Flames: the Institutional Cause of Vegetation Fires (European Union Forest Fire Prevention and Control Project and Indonesian Ministry of Forestry and Estate Crops, Jakarta, 1999)

    Google Scholar 

  13. Stiebig, H.-J., Achard, F., Eva, H., Mayaux, P. & Richards, T. Forest Cover Change Assessment at the Pan-Tropical Scale using Earth Observation Satellite Data (IUFRO, Kuala Lumpur, 2000)

    Google Scholar 

  14. Liew, S. C., Lim, O. K., Kwoh, L. K. & Lim, H. Proc. 1998 Int. Geoscience and Remote Sensing Symp. 879–881 (IEEE, Piscataway, New Jersey, 1998)

    Google Scholar 

  15. Jordan, C. F. Tropical Rain Forest Ecosystems. Ecosystems of the World 14 (ed. Golley, F. B.) 117–135 (Elsevier, Amsterdam, 1983)

    Google Scholar 

  16. Siegert, F. & Rücker, G. Use of multitemporal ERS-2 SAR images for identification of burned scars in Southeast Asian tropical rain forest. Int. J. Remote Sens. 21, 831–837 (2000)

    Article  Google Scholar 

  17. Ulaby, F. T., Moore, R. K. & Fung, A. K. Microwave Remote Sensing: Active and Passive Vol III, From Theory to Applications 1811–1830 (Artech House, Dedham, 1986)

    Google Scholar 

  18. Neuzil, S. G. Biodiversity and Sustainability of Tropical Peatlands (eds Rieley, J. O. & Page, S. E.) 55–72 (Samara, Cardigan, UK, 1997)

    Google Scholar 

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NOAA AVHRR hotspot data were provided by the IFFM/GTZ Integrated Forest Fire Management Project. This work was supported by the European Union and the UK Darwin initiative.

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Correspondence to Susan E. Page.

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Page, S., Siegert, F., Rieley, J. et al. The amount of carbon released from peat and forest fires in Indonesia during 1997. Nature 420, 61–65 (2002).

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