Vertical profiling and determination of landscape fluxes of biogenic nonmethane hydrocarbons within the planetary boundary layer in the Peruvian Amazon

Detlev Helmig, Ben Balsley, Kenneth James Davis, Laura R. Kuck, Mike Jensen, John Bognar, Tyrrel Smith, Rosaura Vasquez Arrieta, Rodolfo Rodríguez, John W. Birks

Research output: Contribution to journalArticle

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Abstract

Vertical profiles of volatile organic compounds (VOCs) within the convective boundary layer (CBL) were measured at a tropical forest site in the Peruvian Amazon during July 1996 from a tethered balloon sampling platform. A profiling technique based on the collection of VOCs onto solid adsorbent cartridges was used to take samples at altitudes up to 1600 m above ground. VOC analysis was performed by thermal desorption with gas chromatographic separation and mass spectrometric and flame ionization detection. A total of 26 VOCs were structurally identified. VOCs were dominated by biogenic compounds. Highest concentrations were observed for isoprene, followed by α-pinene, p-cymene, and β-pinene. Combined, all monoterpenes accounted for approximately 15-20% of the total carbon from biogenic VOCs (BVOCs). The isoprene oxidation products methacrolein (MAC), methylvinylketone (MVK), and 3-methylfuran were observed throughout the CBL. Besides the ubiquitous chlorofluorocarbons, anthropogenic VOC concentrations were at the lower end of concentration ranges observed in rural air. From the vertical profiles, BVOC surface flux estimates were derived. Emission rates were estimated from five vertical profiles using the mixed-layer gradient and CBL budget methods. Emission estimates varied depending on method and choice of statistics, but were within 3000-8200 μg compound m-2 h-1 for isoprene, 120-370 μg m-2h-1 for α-pinene, 40-75 μm m-2 h-1 for β-pinene, about 16 μg m-2 h-1 for p-cymene, and 40-50 μg m-2 h-1 for camphene. The changes in the ratios of MAC and MVK to isoprene with altitude were utilized to estimate the mixing times between the surface layer, mixed layer and lower troposphere.

Original languageEnglish (US)
Article number98JD01023
Pages (from-to)25519-25532
Number of pages14
JournalJournal of Geophysical Research Atmospheres
Volume103
Issue numberD19
DOIs
StatePublished - Oct 20 1998

Fingerprint

planetary boundary layer
Volatile Organic Compounds
nonmethane hydrocarbon
volatile organic compounds
Hydrocarbons
Volatile organic compounds
volatile organic compound
hydrocarbons
Boundary layers
boundary layer
Fluxes
Isoprene
isoprene
convective boundary layer
vertical profile
p-cymene
boundary layers
mixed layer
tethered balloons
chlorofluorocarbons

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

Helmig, Detlev ; Balsley, Ben ; Davis, Kenneth James ; Kuck, Laura R. ; Jensen, Mike ; Bognar, John ; Smith, Tyrrel ; Arrieta, Rosaura Vasquez ; Rodríguez, Rodolfo ; Birks, John W. / Vertical profiling and determination of landscape fluxes of biogenic nonmethane hydrocarbons within the planetary boundary layer in the Peruvian Amazon. In: Journal of Geophysical Research Atmospheres. 1998 ; Vol. 103, No. D19. pp. 25519-25532.
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title = "Vertical profiling and determination of landscape fluxes of biogenic nonmethane hydrocarbons within the planetary boundary layer in the Peruvian Amazon",
abstract = "Vertical profiles of volatile organic compounds (VOCs) within the convective boundary layer (CBL) were measured at a tropical forest site in the Peruvian Amazon during July 1996 from a tethered balloon sampling platform. A profiling technique based on the collection of VOCs onto solid adsorbent cartridges was used to take samples at altitudes up to 1600 m above ground. VOC analysis was performed by thermal desorption with gas chromatographic separation and mass spectrometric and flame ionization detection. A total of 26 VOCs were structurally identified. VOCs were dominated by biogenic compounds. Highest concentrations were observed for isoprene, followed by α-pinene, p-cymene, and β-pinene. Combined, all monoterpenes accounted for approximately 15-20{\%} of the total carbon from biogenic VOCs (BVOCs). The isoprene oxidation products methacrolein (MAC), methylvinylketone (MVK), and 3-methylfuran were observed throughout the CBL. Besides the ubiquitous chlorofluorocarbons, anthropogenic VOC concentrations were at the lower end of concentration ranges observed in rural air. From the vertical profiles, BVOC surface flux estimates were derived. Emission rates were estimated from five vertical profiles using the mixed-layer gradient and CBL budget methods. Emission estimates varied depending on method and choice of statistics, but were within 3000-8200 μg compound m-2 h-1 for isoprene, 120-370 μg m-2h-1 for α-pinene, 40-75 μm m-2 h-1 for β-pinene, about 16 μg m-2 h-1 for p-cymene, and 40-50 μg m-2 h-1 for camphene. The changes in the ratios of MAC and MVK to isoprene with altitude were utilized to estimate the mixing times between the surface layer, mixed layer and lower troposphere.",
author = "Detlev Helmig and Ben Balsley and Davis, {Kenneth James} and Kuck, {Laura R.} and Mike Jensen and John Bognar and Tyrrel Smith and Arrieta, {Rosaura Vasquez} and Rodolfo Rodr{\'i}guez and Birks, {John W.}",
year = "1998",
month = "10",
day = "20",
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Helmig, D, Balsley, B, Davis, KJ, Kuck, LR, Jensen, M, Bognar, J, Smith, T, Arrieta, RV, Rodríguez, R & Birks, JW 1998, 'Vertical profiling and determination of landscape fluxes of biogenic nonmethane hydrocarbons within the planetary boundary layer in the Peruvian Amazon', Journal of Geophysical Research Atmospheres, vol. 103, no. D19, 98JD01023, pp. 25519-25532. https://doi.org/10.1029/98JD01023

Vertical profiling and determination of landscape fluxes of biogenic nonmethane hydrocarbons within the planetary boundary layer in the Peruvian Amazon. / Helmig, Detlev; Balsley, Ben; Davis, Kenneth James; Kuck, Laura R.; Jensen, Mike; Bognar, John; Smith, Tyrrel; Arrieta, Rosaura Vasquez; Rodríguez, Rodolfo; Birks, John W.

In: Journal of Geophysical Research Atmospheres, Vol. 103, No. D19, 98JD01023, 20.10.1998, p. 25519-25532.

Research output: Contribution to journalArticle

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T1 - Vertical profiling and determination of landscape fluxes of biogenic nonmethane hydrocarbons within the planetary boundary layer in the Peruvian Amazon

AU - Helmig, Detlev

AU - Balsley, Ben

AU - Davis, Kenneth James

AU - Kuck, Laura R.

AU - Jensen, Mike

AU - Bognar, John

AU - Smith, Tyrrel

AU - Arrieta, Rosaura Vasquez

AU - Rodríguez, Rodolfo

AU - Birks, John W.

PY - 1998/10/20

Y1 - 1998/10/20

N2 - Vertical profiles of volatile organic compounds (VOCs) within the convective boundary layer (CBL) were measured at a tropical forest site in the Peruvian Amazon during July 1996 from a tethered balloon sampling platform. A profiling technique based on the collection of VOCs onto solid adsorbent cartridges was used to take samples at altitudes up to 1600 m above ground. VOC analysis was performed by thermal desorption with gas chromatographic separation and mass spectrometric and flame ionization detection. A total of 26 VOCs were structurally identified. VOCs were dominated by biogenic compounds. Highest concentrations were observed for isoprene, followed by α-pinene, p-cymene, and β-pinene. Combined, all monoterpenes accounted for approximately 15-20% of the total carbon from biogenic VOCs (BVOCs). The isoprene oxidation products methacrolein (MAC), methylvinylketone (MVK), and 3-methylfuran were observed throughout the CBL. Besides the ubiquitous chlorofluorocarbons, anthropogenic VOC concentrations were at the lower end of concentration ranges observed in rural air. From the vertical profiles, BVOC surface flux estimates were derived. Emission rates were estimated from five vertical profiles using the mixed-layer gradient and CBL budget methods. Emission estimates varied depending on method and choice of statistics, but were within 3000-8200 μg compound m-2 h-1 for isoprene, 120-370 μg m-2h-1 for α-pinene, 40-75 μm m-2 h-1 for β-pinene, about 16 μg m-2 h-1 for p-cymene, and 40-50 μg m-2 h-1 for camphene. The changes in the ratios of MAC and MVK to isoprene with altitude were utilized to estimate the mixing times between the surface layer, mixed layer and lower troposphere.

AB - Vertical profiles of volatile organic compounds (VOCs) within the convective boundary layer (CBL) were measured at a tropical forest site in the Peruvian Amazon during July 1996 from a tethered balloon sampling platform. A profiling technique based on the collection of VOCs onto solid adsorbent cartridges was used to take samples at altitudes up to 1600 m above ground. VOC analysis was performed by thermal desorption with gas chromatographic separation and mass spectrometric and flame ionization detection. A total of 26 VOCs were structurally identified. VOCs were dominated by biogenic compounds. Highest concentrations were observed for isoprene, followed by α-pinene, p-cymene, and β-pinene. Combined, all monoterpenes accounted for approximately 15-20% of the total carbon from biogenic VOCs (BVOCs). The isoprene oxidation products methacrolein (MAC), methylvinylketone (MVK), and 3-methylfuran were observed throughout the CBL. Besides the ubiquitous chlorofluorocarbons, anthropogenic VOC concentrations were at the lower end of concentration ranges observed in rural air. From the vertical profiles, BVOC surface flux estimates were derived. Emission rates were estimated from five vertical profiles using the mixed-layer gradient and CBL budget methods. Emission estimates varied depending on method and choice of statistics, but were within 3000-8200 μg compound m-2 h-1 for isoprene, 120-370 μg m-2h-1 for α-pinene, 40-75 μm m-2 h-1 for β-pinene, about 16 μg m-2 h-1 for p-cymene, and 40-50 μg m-2 h-1 for camphene. The changes in the ratios of MAC and MVK to isoprene with altitude were utilized to estimate the mixing times between the surface layer, mixed layer and lower troposphere.

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