What caused the 1997 haze disaster in Southeast Asia?

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The 1997 haze disaster in Southeast Asia was primarily caused by widespread forest fires in Indonesia, exacerbated by El Niño-driven winds.

The 1997 haze disaster in Southeast Asia was a severe environmental and health crisis largely stemming from extensive forest and land fires in Indonesia. These fires were amplified by the prevailing El Niño winds, which facilitated their spread and carried the smoke across regional borders. The scale of the fires was unprecedented, leading to significant economic losses and a substantial increase in mortality rates across affected nations.
Indonesia as the Epicenter of Forest Fires

Indonesia, possessing the largest tropical and peat forests in the subregion, has historically been identified as the primary source of forest fires and subsequent haze. The fires in 1997-1998 were particularly catastrophic, engulfing approximately 9.7 million hectares of land. These events were not solely natural occurrences; they were significantly worsened by ongoing land-clearing operations conducted by timber and plantation firms, a practice that has escalated in the preceding decade. Provinces such as Riau on Sumatra and West Kalimantan were identified as particularly affected areas, contributing substantially to the regional haze.
El Niño and Wind Patterns

The impact of the Indonesian fires was magnified by meteorological conditions, notably the El Niño phenomenon. El Niño-driven winds, specifically from the southeast and southwest, played a crucial role in transporting the dense smoke and particulate matter across vast distances. In 1997, these winds directed the haze towards densely populated areas in Malaysia and Singapore, directly impacting millions of lives and causing widespread disruption.
Economic and Health Repercussions

The economic consequences of the 1997 haze were severe, with estimates of losses to tourism, transportation, and farming industries reaching approximately US$9 billion (RM27.9 billion). Beyond economic impacts, the health implications were profound. Exposure to the polluted air led to a range of ailments, including sneezing, running noses, eye irritations, dry throats, and dry coughs. In the most severely affected areas, breathing the air was equated to smoking up to 80 cigarettes daily. Research indicated a significant increase in mortality burden in Malaysia, particularly among the elderly aged 65-74, and an estimated over 15,600 foetal, infant, and child deaths in Indonesia, representing a 1.2 percent decrease in survival rates for these vulnerable groups.

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What caused the 1997 haze disaster in Southeast Asia?

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