Biogenic versus anthropogenic sources of CO in the United States

R. C. Hudman; L. T. Murray; D. J. Jacob; D. B. Millet; Solene Turquety; S. Wu; D. R. Blake; A. H. Goldstein; John S. Holloway; Glen W. Sachse

doi:10.1029/2007GL032393

Biogenic versus anthropogenic sources of CO in the United States

R. C. Hudman, L. T. Murray, D. J. Jacob, D. B. Millet, Solene Turquety, S. Wu, D. R. Blake, A. H. Goldstein, John S. Holloway, Glen W. Sachse

Soil, Water, and Climate

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Abstract

Aircraft observations of carbon monoxide (CO) from the ICARTT campaign over the eastern United States in summer 2004 (July 1 -August 15), interpreted with a global 3-D model of tropospheric chemistry (GEOS-Chem), show that the national anthropogenic emission inventory from the U.S. Environmental Protection Agency (93 Tg CO y^-1) is too high by 60% in summer. Our best estimate of the CO anthropogenic source for the ICARTT period is 6.4 Tg CO, including 4.6 Tg from direct emission and 1.8 Tg CO from oxidation of anthropogenic volatile organic compounds (VOCs). The biogenic CO source for the same period from the oxidation of isoprene and other biogenic VOCs is 8.3 Tg CO, and is independently constrained by ICARTT observations of formaldehyde (HCHO). Anthropogenic emissions of CO in the U.S. have decreased to the point that they are now lower than the biogenic source in summer.

Original language	English (US)
Article number	L04801
Journal	Geophysical Research Letters
Volume	35
Issue number	4
DOIs	https://doi.org/10.1029/2007GL032393
State	Published - Feb 28 2008

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title = "Biogenic versus anthropogenic sources of CO in the United States",

abstract = "Aircraft observations of carbon monoxide (CO) from the ICARTT campaign over the eastern United States in summer 2004 (July 1 -August 15), interpreted with a global 3-D model of tropospheric chemistry (GEOS-Chem), show that the national anthropogenic emission inventory from the U.S. Environmental Protection Agency (93 Tg CO y-1) is too high by 60% in summer. Our best estimate of the CO anthropogenic source for the ICARTT period is 6.4 Tg CO, including 4.6 Tg from direct emission and 1.8 Tg CO from oxidation of anthropogenic volatile organic compounds (VOCs). The biogenic CO source for the same period from the oxidation of isoprene and other biogenic VOCs is 8.3 Tg CO, and is independently constrained by ICARTT observations of formaldehyde (HCHO). Anthropogenic emissions of CO in the U.S. have decreased to the point that they are now lower than the biogenic source in summer.",

author = "Hudman, {R. C.} and Murray, {L. T.} and Jacob, {D. J.} and Millet, {D. B.} and Solene Turquety and S. Wu and Blake, {D. R.} and Goldstein, {A. H.} and Holloway, {John S.} and Sachse, {Glen W.}",

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AU - Hudman, R. C.

AU - Murray, L. T.

AU - Jacob, D. J.

AU - Millet, D. B.

AU - Turquety, Solene

AU - Wu, S.

AU - Blake, D. R.

AU - Goldstein, A. H.

AU - Holloway, John S.

AU - Sachse, Glen W.

PY - 2008/2/28

Y1 - 2008/2/28

N2 - Aircraft observations of carbon monoxide (CO) from the ICARTT campaign over the eastern United States in summer 2004 (July 1 -August 15), interpreted with a global 3-D model of tropospheric chemistry (GEOS-Chem), show that the national anthropogenic emission inventory from the U.S. Environmental Protection Agency (93 Tg CO y-1) is too high by 60% in summer. Our best estimate of the CO anthropogenic source for the ICARTT period is 6.4 Tg CO, including 4.6 Tg from direct emission and 1.8 Tg CO from oxidation of anthropogenic volatile organic compounds (VOCs). The biogenic CO source for the same period from the oxidation of isoprene and other biogenic VOCs is 8.3 Tg CO, and is independently constrained by ICARTT observations of formaldehyde (HCHO). Anthropogenic emissions of CO in the U.S. have decreased to the point that they are now lower than the biogenic source in summer.

AB - Aircraft observations of carbon monoxide (CO) from the ICARTT campaign over the eastern United States in summer 2004 (July 1 -August 15), interpreted with a global 3-D model of tropospheric chemistry (GEOS-Chem), show that the national anthropogenic emission inventory from the U.S. Environmental Protection Agency (93 Tg CO y-1) is too high by 60% in summer. Our best estimate of the CO anthropogenic source for the ICARTT period is 6.4 Tg CO, including 4.6 Tg from direct emission and 1.8 Tg CO from oxidation of anthropogenic volatile organic compounds (VOCs). The biogenic CO source for the same period from the oxidation of isoprene and other biogenic VOCs is 8.3 Tg CO, and is independently constrained by ICARTT observations of formaldehyde (HCHO). Anthropogenic emissions of CO in the U.S. have decreased to the point that they are now lower than the biogenic source in summer.

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Biogenic versus anthropogenic sources of CO in the United States

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