The Indian Ocean Experiment: Widespread air pollution from South and Southeast Asia

J Lelieveld*, PJ Crutzen, A. Ramanathan, MO Andreae, CAM Brenninkmeijer, T Campos, GR Cass, RR Dickerson, H Fischer, JA de Gouw, A Hansel, A Jefferson, D Kley, ATJ de Laat, S Lal, MG Lawrence, JM Lobert, OL Mayol-Bracero, AP Mitra, T NovakovSJ Oltmans, KA Prather, T Reiner, H Rodhe, HA Scheeren, D Sikka, J Williams

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

549 Citations (Scopus)

Abstract

The Indian Ocean Experiment (INDOEX) was an international, multiplatform field campaign to measure Long-range transport of air pollution from South and Southeast Asia toward the Indian Ocean during the dry monsoon season in January to March 1999. Surprisingly high pollution Levels were observed over the entire northern Indian Ocean toward the Intertropical Convergence Zone at about 6 degreesS. We show that agricultural burning and especially biofuel use enhance carbon monoxide concentrations. Fossil fuel combustion and biomass burning cause a high aerosol Loading. The growing pollution in this region gives rise to extensive air quality degradation with Local, regional, and global implications, including a reduction of the oxidizing power of the atmosphere.

Original languageEnglish
Pages (from-to)1031-1036
Number of pages6
JournalScience
Volume291
Issue number5506
Publication statusPublished - 9-Feb-2001

Keywords

  • CHLORINE EMISSIONS INVENTORY
  • MARINE BOUNDARY-LAYER
  • TROPOSPHERIC OZONE
  • CARBONACEOUS AEROSOLS
  • AIRCRAFT MEASUREMENTS
  • OPTICAL-PROPERTIES
  • REACTIVE CHLORINE
  • SULFUR-DIOXIDE
  • CHEMISTRY
  • PARTICLES

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