First measurements of H2O2 and organic peroxide surface fluces by the Relaxed Eddy Accumulation technique

J. Valverde-Canossa, L.N. Ganzeveld, B. Rappenglück, R. Steinbrecher, O. Klemm, G. Schuster, G.K. Moortgat

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Abstract

The relaxed eddy-accumulation (REA) technique was specially adapted to a high-performance liquid chromatographer (enzymatic method) and scrubbing coils to measure concentrations and fluxes of hydrogen peroxide (H2O2) and organic peroxides with a carbon chain C4, of which only methylhydroperoxide (MHP) and hydroxymethylhydroperoxide (HMHP) were detected. Flux measurements were carried out above the canopy of a Norway spruce forest in Germany (775 m a.s.l.) in NE Bavaria, Germany, during the BEWA2000 research cluster in summer 2001. This period was characterised by H2O2 maximum mixing ratios of 1 ppb and mixing ratios of organic peroxides below 200 ppt. Daily mean H2O2 deposition fluxes of ¿0.8±0.3 nmol m¿2 s¿1, MHP of ¿0.03±0.03 nmol m¿2 s¿1 and HMHP of ¿0.7±0.5 nmol m¿2 s¿1 were obtained. Profile measurements were performed as a qualitative comparison of the controlling mechanism of the surface exchanges. The REA as well as the profile measurements show that during daylight the surface exchanges of H2O2 and MHP over coniferous forest are mainly controlled by dry deposition. The high H2O2 dry-deposition velocity suggests a negligible surface uptake resistance for H2O2, whereas the significantly smaller MHP-deposition velocity indicates a significant surface uptake resistance. However, nighttime surface exchanges of these compounds should be further investigated since the in-canopy ozonolysis reaction is expected to affect exchanges. HMHP REA flux measurements show mainly deposition, whereas the ones based on the profile method suggest in-canopy chemical production
Original languageEnglish
Pages (from-to)S55-S67
JournalAtmospheric Environment
Volume40
Issue numberSuppl. 1
DOIs
Publication statusPublished - 2006

Fingerprint

eddy
deposition velocity
canopy
flux measurement
dry deposition
mixing ratio
coniferous forest
hydrogen peroxide
liquid
carbon
summer
method

Keywords

  • gas-phase ozonolysis
  • dry deposition
  • hydrogen-peroxide
  • hydroxymethyl hydroperoxide
  • forest canopy
  • niwot ridge
  • model
  • acid
  • vegetation
  • chemistry

Cite this

Valverde-Canossa, J., Ganzeveld, L. N., Rappenglück, B., Steinbrecher, R., Klemm, O., Schuster, G., & Moortgat, G. K. (2006). First measurements of H2O2 and organic peroxide surface fluces by the Relaxed Eddy Accumulation technique. Atmospheric Environment, 40(Suppl. 1), S55-S67. https://doi.org/10.1016/j.atmosenv.2006.03.038
Valverde-Canossa, J. ; Ganzeveld, L.N. ; Rappenglück, B. ; Steinbrecher, R. ; Klemm, O. ; Schuster, G. ; Moortgat, G.K. / First measurements of H2O2 and organic peroxide surface fluces by the Relaxed Eddy Accumulation technique. In: Atmospheric Environment. 2006 ; Vol. 40, No. Suppl. 1. pp. S55-S67.
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Valverde-Canossa, J, Ganzeveld, LN, Rappenglück, B, Steinbrecher, R, Klemm, O, Schuster, G & Moortgat, GK 2006, 'First measurements of H2O2 and organic peroxide surface fluces by the Relaxed Eddy Accumulation technique' Atmospheric Environment, vol. 40, no. Suppl. 1, pp. S55-S67. https://doi.org/10.1016/j.atmosenv.2006.03.038

First measurements of H2O2 and organic peroxide surface fluces by the Relaxed Eddy Accumulation technique. / Valverde-Canossa, J.; Ganzeveld, L.N.; Rappenglück, B.; Steinbrecher, R.; Klemm, O.; Schuster, G.; Moortgat, G.K.

In: Atmospheric Environment, Vol. 40, No. Suppl. 1, 2006, p. S55-S67.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - First measurements of H2O2 and organic peroxide surface fluces by the Relaxed Eddy Accumulation technique

AU - Valverde-Canossa, J.

AU - Ganzeveld, L.N.

AU - Rappenglück, B.

AU - Steinbrecher, R.

AU - Klemm, O.

AU - Schuster, G.

AU - Moortgat, G.K.

PY - 2006

Y1 - 2006

N2 - The relaxed eddy-accumulation (REA) technique was specially adapted to a high-performance liquid chromatographer (enzymatic method) and scrubbing coils to measure concentrations and fluxes of hydrogen peroxide (H2O2) and organic peroxides with a carbon chain C4, of which only methylhydroperoxide (MHP) and hydroxymethylhydroperoxide (HMHP) were detected. Flux measurements were carried out above the canopy of a Norway spruce forest in Germany (775 m a.s.l.) in NE Bavaria, Germany, during the BEWA2000 research cluster in summer 2001. This period was characterised by H2O2 maximum mixing ratios of 1 ppb and mixing ratios of organic peroxides below 200 ppt. Daily mean H2O2 deposition fluxes of ¿0.8±0.3 nmol m¿2 s¿1, MHP of ¿0.03±0.03 nmol m¿2 s¿1 and HMHP of ¿0.7±0.5 nmol m¿2 s¿1 were obtained. Profile measurements were performed as a qualitative comparison of the controlling mechanism of the surface exchanges. The REA as well as the profile measurements show that during daylight the surface exchanges of H2O2 and MHP over coniferous forest are mainly controlled by dry deposition. The high H2O2 dry-deposition velocity suggests a negligible surface uptake resistance for H2O2, whereas the significantly smaller MHP-deposition velocity indicates a significant surface uptake resistance. However, nighttime surface exchanges of these compounds should be further investigated since the in-canopy ozonolysis reaction is expected to affect exchanges. HMHP REA flux measurements show mainly deposition, whereas the ones based on the profile method suggest in-canopy chemical production

AB - The relaxed eddy-accumulation (REA) technique was specially adapted to a high-performance liquid chromatographer (enzymatic method) and scrubbing coils to measure concentrations and fluxes of hydrogen peroxide (H2O2) and organic peroxides with a carbon chain C4, of which only methylhydroperoxide (MHP) and hydroxymethylhydroperoxide (HMHP) were detected. Flux measurements were carried out above the canopy of a Norway spruce forest in Germany (775 m a.s.l.) in NE Bavaria, Germany, during the BEWA2000 research cluster in summer 2001. This period was characterised by H2O2 maximum mixing ratios of 1 ppb and mixing ratios of organic peroxides below 200 ppt. Daily mean H2O2 deposition fluxes of ¿0.8±0.3 nmol m¿2 s¿1, MHP of ¿0.03±0.03 nmol m¿2 s¿1 and HMHP of ¿0.7±0.5 nmol m¿2 s¿1 were obtained. Profile measurements were performed as a qualitative comparison of the controlling mechanism of the surface exchanges. The REA as well as the profile measurements show that during daylight the surface exchanges of H2O2 and MHP over coniferous forest are mainly controlled by dry deposition. The high H2O2 dry-deposition velocity suggests a negligible surface uptake resistance for H2O2, whereas the significantly smaller MHP-deposition velocity indicates a significant surface uptake resistance. However, nighttime surface exchanges of these compounds should be further investigated since the in-canopy ozonolysis reaction is expected to affect exchanges. HMHP REA flux measurements show mainly deposition, whereas the ones based on the profile method suggest in-canopy chemical production

KW - gas-phase ozonolysis

KW - dry deposition

KW - hydrogen-peroxide

KW - hydroxymethyl hydroperoxide

KW - forest canopy

KW - niwot ridge

KW - model

KW - acid

KW - vegetation

KW - chemistry

U2 - 10.1016/j.atmosenv.2006.03.038

DO - 10.1016/j.atmosenv.2006.03.038

M3 - Article

VL - 40

SP - S55-S67

JO - Atmospheric Environment

JF - Atmospheric Environment

SN - 1352-2310

IS - Suppl. 1

ER -