Influences of biomass burning during the Transport and Chemical Evolution Over the Pacific (TRACE-P) experiment identified by the regional chemical transport model

Youhua Tang, Gregory R. Carmichael, Jung Hun Woo, Narisara Thongboonchoo, Gakuji Kurata, Itsushi Uno, David G. Streets, Donald R. Blake, Rodney J. Weber, Robert W. Talbot, Yutaka Kondo, Hanwant B. Singh, Tao Wang

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Abstract

Using a regional chemical transport model, STEM 2K1, and the emission inventory for the Transport and Chemical Evolution Over the Pacific (TRACE-P) period [Woo et al., 2003 Streets et al., 2003], we successfully simulated important features of the biomass burning (BB) CO outflow. Simulated results agree well with the TRACE-P aircraft measurements and Thailand surface observations. On the basis of sensitivity studies with and without biomass emissions, we identified nine flight segments that are affected by biomass plumes during the TRACE-P period and compared the characteristics of the BB air masses with the other air masses. The BB air masses emitted from Southeast Asia contain relatively high HCN (ΔHCN/ΔCO ∼ 0.0015) and potassium (ΔK+/ΔCO ∼ 0.0038) but very low NOy (ΔNOy/ΔCO ∼ 0.005) mixing ratios, which may be associated with the special burning condition in this region. The biomass burning air masses have high ozone production efficiency. The observed ΔO3/ΔNOz values were ∼ 17 in biomass events and 1.7 in other events. The BB influence on the trace gas distributions can be divided into two categories: the influence through direct reactions and the influence caused by BB aerosols changing J values. These two influences are discussed for the BB-affected TRACE-P flights and for east Asia. The BB influences on chemical species are not only determined by the BB plume intensity but also by the ambient environment caused by other emissions. In Southeast Asia, where the biogenic emissions are very strong, the OH background concentration is low, and the BB gas-phase compounds mainly contribute to OH production. Arranged in the sensitivity to the J value change caused by BB aerosols, we have OH > HO2 > HCHO > O3 when evaluated on a regional average. Averaged over March, the biomass burning net influence is as high as 50% for OH, 40% for HO2, 60% for HCHO, and 10 ppbv for O3 forth the layers below 1 km.

Original languageEnglish
JournalJournal of Geophysical Research: Atmospheres
Volume108
Issue number21
Publication statusPublished - Nov 16 2003

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biomass burning
chemical evolution
Biomass
biomass
experiment
air masses
Experiments
air mass
Carbon Monoxide
Southeast Asia
air
plumes
chemical
aerosols
Air
Aerosols
South East Asia
plume
flight
aerosol

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Influences of biomass burning during the Transport and Chemical Evolution Over the Pacific (TRACE-P) experiment identified by the regional chemical transport model. / Tang, Youhua; Carmichael, Gregory R.; Woo, Jung Hun; Thongboonchoo, Narisara; Kurata, Gakuji; Uno, Itsushi; Streets, David G.; Blake, Donald R.; Weber, Rodney J.; Talbot, Robert W.; Kondo, Yutaka; Singh, Hanwant B.; Wang, Tao.

In: Journal of Geophysical Research: Atmospheres, Vol. 108, No. 21, 16.11.2003.

Research output: Contribution to journalArticle

Tang, Y, Carmichael, GR, Woo, JH, Thongboonchoo, N, Kurata, G, Uno, I, Streets, DG, Blake, DR, Weber, RJ, Talbot, RW, Kondo, Y, Singh, HB & Wang, T 2003, 'Influences of biomass burning during the Transport and Chemical Evolution Over the Pacific (TRACE-P) experiment identified by the regional chemical transport model', Journal of Geophysical Research: Atmospheres, vol. 108, no. 21.
Tang, Youhua ; Carmichael, Gregory R. ; Woo, Jung Hun ; Thongboonchoo, Narisara ; Kurata, Gakuji ; Uno, Itsushi ; Streets, David G. ; Blake, Donald R. ; Weber, Rodney J. ; Talbot, Robert W. ; Kondo, Yutaka ; Singh, Hanwant B. ; Wang, Tao. / Influences of biomass burning during the Transport and Chemical Evolution Over the Pacific (TRACE-P) experiment identified by the regional chemical transport model. In: Journal of Geophysical Research: Atmospheres. 2003 ; Vol. 108, No. 21.
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abstract = "Using a regional chemical transport model, STEM 2K1, and the emission inventory for the Transport and Chemical Evolution Over the Pacific (TRACE-P) period [Woo et al., 2003 Streets et al., 2003], we successfully simulated important features of the biomass burning (BB) CO outflow. Simulated results agree well with the TRACE-P aircraft measurements and Thailand surface observations. On the basis of sensitivity studies with and without biomass emissions, we identified nine flight segments that are affected by biomass plumes during the TRACE-P period and compared the characteristics of the BB air masses with the other air masses. The BB air masses emitted from Southeast Asia contain relatively high HCN (ΔHCN/ΔCO ∼ 0.0015) and potassium (ΔK+/ΔCO ∼ 0.0038) but very low NOy (ΔNOy/ΔCO ∼ 0.005) mixing ratios, which may be associated with the special burning condition in this region. The biomass burning air masses have high ozone production efficiency. The observed ΔO3/ΔNOz values were ∼ 17 in biomass events and 1.7 in other events. The BB influence on the trace gas distributions can be divided into two categories: the influence through direct reactions and the influence caused by BB aerosols changing J values. These two influences are discussed for the BB-affected TRACE-P flights and for east Asia. The BB influences on chemical species are not only determined by the BB plume intensity but also by the ambient environment caused by other emissions. In Southeast Asia, where the biogenic emissions are very strong, the OH background concentration is low, and the BB gas-phase compounds mainly contribute to OH production. Arranged in the sensitivity to the J value change caused by BB aerosols, we have OH > HO2 > HCHO > O3 when evaluated on a regional average. Averaged over March, the biomass burning net influence is as high as 50{\%} for OH, 40{\%} for HO2, 60{\%} for HCHO, and 10 ppbv for O3 forth the layers below 1 km.",
author = "Youhua Tang and Carmichael, {Gregory R.} and Woo, {Jung Hun} and Narisara Thongboonchoo and Gakuji Kurata and Itsushi Uno and Streets, {David G.} and Blake, {Donald R.} and Weber, {Rodney J.} and Talbot, {Robert W.} and Yutaka Kondo and Singh, {Hanwant B.} and Tao Wang",
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AU - Tang, Youhua

AU - Carmichael, Gregory R.

AU - Woo, Jung Hun

AU - Thongboonchoo, Narisara

AU - Kurata, Gakuji

AU - Uno, Itsushi

AU - Streets, David G.

AU - Blake, Donald R.

AU - Weber, Rodney J.

AU - Talbot, Robert W.

AU - Kondo, Yutaka

AU - Singh, Hanwant B.

AU - Wang, Tao

PY - 2003/11/16

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N2 - Using a regional chemical transport model, STEM 2K1, and the emission inventory for the Transport and Chemical Evolution Over the Pacific (TRACE-P) period [Woo et al., 2003 Streets et al., 2003], we successfully simulated important features of the biomass burning (BB) CO outflow. Simulated results agree well with the TRACE-P aircraft measurements and Thailand surface observations. On the basis of sensitivity studies with and without biomass emissions, we identified nine flight segments that are affected by biomass plumes during the TRACE-P period and compared the characteristics of the BB air masses with the other air masses. The BB air masses emitted from Southeast Asia contain relatively high HCN (ΔHCN/ΔCO ∼ 0.0015) and potassium (ΔK+/ΔCO ∼ 0.0038) but very low NOy (ΔNOy/ΔCO ∼ 0.005) mixing ratios, which may be associated with the special burning condition in this region. The biomass burning air masses have high ozone production efficiency. The observed ΔO3/ΔNOz values were ∼ 17 in biomass events and 1.7 in other events. The BB influence on the trace gas distributions can be divided into two categories: the influence through direct reactions and the influence caused by BB aerosols changing J values. These two influences are discussed for the BB-affected TRACE-P flights and for east Asia. The BB influences on chemical species are not only determined by the BB plume intensity but also by the ambient environment caused by other emissions. In Southeast Asia, where the biogenic emissions are very strong, the OH background concentration is low, and the BB gas-phase compounds mainly contribute to OH production. Arranged in the sensitivity to the J value change caused by BB aerosols, we have OH > HO2 > HCHO > O3 when evaluated on a regional average. Averaged over March, the biomass burning net influence is as high as 50% for OH, 40% for HO2, 60% for HCHO, and 10 ppbv for O3 forth the layers below 1 km.

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