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AGU: Journal of Geophysical Research, Atmospheres

 

Index Terms

  • Atmospheric Composition and Structure: Constituent sources and sinks
  • Atmospheric Composition and Structure: Troposphere—composition and chemistry
  • Atmospheric Composition and Structure: Troposphere—constituent transport and chemistry
Abstract
Cited By (7)
 

Abstract

Removal of NO x and NO y in biomass burning plumes in the boundary layer over northern Australia

N. Takegawa

Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan

Y. Kondo

Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan

M. Koike

Department of Earth and Planetary Science, University of Tokyo, Tokyo, Japan

M. Ko

Atmospheric and Environmental Research Inc., Lexington, Massachusetts, USA

K. Kita

Department of Environmental Sciences, Ibaraki University, Ibaraki, Japan

D. R. Blake

Department of Chemistry, University of California, Irvine, California, USA

N. Nishi

Department of Earth and Planetary Science, Kyoto University, Kyoto, Japan

W. Hu

Department of Environmental Quality, Richmond, Virginia, USA

J. B. Liley

National Institute of Water and Atmosphere, Lauder, New Zealand

S. Kawakami

Earth Observation Research Center, National Space Development Agency of Japan, Tokyo, Japan

T. Shirai

Earth Observation Research Center, National Space Development Agency of Japan, Tokyo, Japan

Y. Miyazaki

Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan

H. Ikeda

Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan

J. Russel-Smith

Bushfire Council of Northern Territory, Darwin, Northern Territory, Australia

T. Ogawa

Earth Observation Research Center, National Space Development Agency of Japan, Tokyo, Japan

The Biomass Burning and Lightning Experiment Phase B (BIBLE-B) aircraft measurement campaign was conducted over the western Pacific and Australia in August and September 1999. In situ aircraft measurements of carbon monoxide (CO), nitric oxide (NO), total reactive nitrogen (NO y ), ozone (O3), nonmethane hydrocarbons (NMHCs), and other species were made during BIBLE-B. Meteorological analysis shows that the trace gases emitted from biomass burning in northern Australia were mostly confined within the planetary boundary layer (below ∼3 km) by strong subsidence in the free troposphere. Removal processes of NO x (equal to measured NO + calculated NO2) and NO y in biomass burning plumes in the boundary layer are examined on the basis of correlation analysis. The photochemical lifetime of NO x in biomass burning plumes during the daytime is estimated to be 0.1 to 0.3 days using the correlations of NO x with short-lived NMHCs and hydroxyl radical (OH) concentration calculated from a constrained photochemical model. Correlation of NO y with CO shows that ∼60% of the NO y molecules originating from biomass burning were removed in the boundary layer within 2–3 days. This result is consistent with dry deposition of nitric acid (HNO3) in the plumes. It is likely that only a small fraction of NO y emitted from biomass burning was exported from the boundary layer to the free troposphere during the BIBLE-B period.

Received 4 May 2002; accepted 20 November 2002; published 22 May 2003.

Citation: Takegawa, N., et al. (2003), Removal of NO x and NO y in biomass burning plumes in the boundary layer over northern Australia, J. Geophys. Res., 108(D10), 4308, doi:10.1029/2002JD002505.

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