On-line field measurements of monoterpene emissions from Scots pine by proton-transfer-reaction mass spectrometry

Research output: Contribution to journalArticleScientificpeer-review

Abstract

We measured the daily patterns of monoterpene emissions from Scots pine (Pinus sylvestris) trees in a boreal coniferous forest in August and September 2004, using an on-line chamber method combined with a proton-transfer-reaction mass spectrometry (PTR-MS) analyzer. The on-line measurements were made in two chambers with a one-year old shoot inside. Simultaneous measurements were performed for carbon dioxide (CO2) exchange, transpiration (H2O), exchange of trace gases (NOx, O-3), photosynthetic photon flux density (PPFD), air temperature and relative humidity (RH). The composition of the monoterpene emission did not change during the measurement period, with Delta(3)-carene and alpha-pinene being the dominant species. The total monoterpene emission rate (per needle area) was on average 0.5 ng m(-2) s(-1), varied from non detectable to 2.1 ng m(-2) s(-1), and showed a typical diurnal pattern with afternoon maximum and nighttime minimum. The emission rates determined with this on-line chamber method were in agreement with results from a simultaneously used established adsorbent sampling technique with offline GC-MS analysis. The monoterpene emissions from the chamber walls were correlated with the chamber temperature and this measurement artifact was dominating at night. Emission rates normalized to 30 degrees C, using temperature regression coefficient of 0.09 degrees C-1, ranged from 2.1 mu g g(dw)(-1) h(-1) to 4.4 mu g -(dw)(-1) h(-1). Measurements of emission dynamics of biogenic volatile organic compounds (BVOCs) together with plant physiological activity are urgently needed for the development of mechanistic BVOC emission models in order to assess their regional and global influence.
Original languageEnglish
JournalBoreal Environment Research
Volume10
Issue number6
Pages (from-to)553-567
Number of pages15
ISSN1239-6095
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed

Fields of Science

  • VOLATILE ORGANIC-COMPOUNDS
  • EDDY COVARIANCE MEASUREMENTS
  • QUERCUS-ILEX LEAVES
  • PTR-MS
  • COMPOUND EMISSIONS
  • BOREAL FOREST
  • SEASONAL-VARIATION
  • FLUX MEASUREMENTS
  • RATE VARIABILITY
  • TEMPERATURE
  • 411 Agriculture and forestry

Cite this

@article{55180993df6b408e93775137fb5687c0,
title = "On-line field measurements of monoterpene emissions from Scots pine by proton-transfer-reaction mass spectrometry",
abstract = "We measured the daily patterns of monoterpene emissions from Scots pine (Pinus sylvestris) trees in a boreal coniferous forest in August and September 2004, using an on-line chamber method combined with a proton-transfer-reaction mass spectrometry (PTR-MS) analyzer. The on-line measurements were made in two chambers with a one-year old shoot inside. Simultaneous measurements were performed for carbon dioxide (CO2) exchange, transpiration (H2O), exchange of trace gases (NOx, O-3), photosynthetic photon flux density (PPFD), air temperature and relative humidity (RH). The composition of the monoterpene emission did not change during the measurement period, with Delta(3)-carene and alpha-pinene being the dominant species. The total monoterpene emission rate (per needle area) was on average 0.5 ng m(-2) s(-1), varied from non detectable to 2.1 ng m(-2) s(-1), and showed a typical diurnal pattern with afternoon maximum and nighttime minimum. The emission rates determined with this on-line chamber method were in agreement with results from a simultaneously used established adsorbent sampling technique with offline GC-MS analysis. The monoterpene emissions from the chamber walls were correlated with the chamber temperature and this measurement artifact was dominating at night. Emission rates normalized to 30 degrees C, using temperature regression coefficient of 0.09 degrees C-1, ranged from 2.1 mu g g(dw)(-1) h(-1) to 4.4 mu g -(dw)(-1) h(-1). Measurements of emission dynamics of biogenic volatile organic compounds (BVOCs) together with plant physiological activity are urgently needed for the development of mechanistic BVOC emission models in order to assess their regional and global influence.",
keywords = "VOLATILE ORGANIC-COMPOUNDS, EDDY COVARIANCE MEASUREMENTS, QUERCUS-ILEX LEAVES, PTR-MS, COMPOUND EMISSIONS, BOREAL FOREST, SEASONAL-VARIATION, FLUX MEASUREMENTS, RATE VARIABILITY, TEMPERATURE, m{\"a}nty, p{\"a}{\"a}st{\"o}t, terpeenit, ilmakeh{\"a}, 411 Agriculture and forestry",
author = "Ruuskanen, {T M} and P Kolari and J Back and M Kulmala and J Rinne and H Hakola and R Taipale and M Raivonen and Nuria Altimir and P Hari",
year = "2005",
language = "English",
volume = "10",
pages = "553--567",
journal = "Boreal Environment Research",
issn = "1239-6095",
publisher = "Finnish Environment Institute",
number = "6",

}

TY - JOUR

T1 - On-line field measurements of monoterpene emissions from Scots pine by proton-transfer-reaction mass spectrometry

AU - Ruuskanen, T M

AU - Kolari, P

AU - Back, J

AU - Kulmala, M

AU - Rinne, J

AU - Hakola, H

AU - Taipale, R

AU - Raivonen, M

AU - Altimir, Nuria

AU - Hari, P

PY - 2005

Y1 - 2005

N2 - We measured the daily patterns of monoterpene emissions from Scots pine (Pinus sylvestris) trees in a boreal coniferous forest in August and September 2004, using an on-line chamber method combined with a proton-transfer-reaction mass spectrometry (PTR-MS) analyzer. The on-line measurements were made in two chambers with a one-year old shoot inside. Simultaneous measurements were performed for carbon dioxide (CO2) exchange, transpiration (H2O), exchange of trace gases (NOx, O-3), photosynthetic photon flux density (PPFD), air temperature and relative humidity (RH). The composition of the monoterpene emission did not change during the measurement period, with Delta(3)-carene and alpha-pinene being the dominant species. The total monoterpene emission rate (per needle area) was on average 0.5 ng m(-2) s(-1), varied from non detectable to 2.1 ng m(-2) s(-1), and showed a typical diurnal pattern with afternoon maximum and nighttime minimum. The emission rates determined with this on-line chamber method were in agreement with results from a simultaneously used established adsorbent sampling technique with offline GC-MS analysis. The monoterpene emissions from the chamber walls were correlated with the chamber temperature and this measurement artifact was dominating at night. Emission rates normalized to 30 degrees C, using temperature regression coefficient of 0.09 degrees C-1, ranged from 2.1 mu g g(dw)(-1) h(-1) to 4.4 mu g -(dw)(-1) h(-1). Measurements of emission dynamics of biogenic volatile organic compounds (BVOCs) together with plant physiological activity are urgently needed for the development of mechanistic BVOC emission models in order to assess their regional and global influence.

AB - We measured the daily patterns of monoterpene emissions from Scots pine (Pinus sylvestris) trees in a boreal coniferous forest in August and September 2004, using an on-line chamber method combined with a proton-transfer-reaction mass spectrometry (PTR-MS) analyzer. The on-line measurements were made in two chambers with a one-year old shoot inside. Simultaneous measurements were performed for carbon dioxide (CO2) exchange, transpiration (H2O), exchange of trace gases (NOx, O-3), photosynthetic photon flux density (PPFD), air temperature and relative humidity (RH). The composition of the monoterpene emission did not change during the measurement period, with Delta(3)-carene and alpha-pinene being the dominant species. The total monoterpene emission rate (per needle area) was on average 0.5 ng m(-2) s(-1), varied from non detectable to 2.1 ng m(-2) s(-1), and showed a typical diurnal pattern with afternoon maximum and nighttime minimum. The emission rates determined with this on-line chamber method were in agreement with results from a simultaneously used established adsorbent sampling technique with offline GC-MS analysis. The monoterpene emissions from the chamber walls were correlated with the chamber temperature and this measurement artifact was dominating at night. Emission rates normalized to 30 degrees C, using temperature regression coefficient of 0.09 degrees C-1, ranged from 2.1 mu g g(dw)(-1) h(-1) to 4.4 mu g -(dw)(-1) h(-1). Measurements of emission dynamics of biogenic volatile organic compounds (BVOCs) together with plant physiological activity are urgently needed for the development of mechanistic BVOC emission models in order to assess their regional and global influence.

KW - VOLATILE ORGANIC-COMPOUNDS

KW - EDDY COVARIANCE MEASUREMENTS

KW - QUERCUS-ILEX LEAVES

KW - PTR-MS

KW - COMPOUND EMISSIONS

KW - BOREAL FOREST

KW - SEASONAL-VARIATION

KW - FLUX MEASUREMENTS

KW - RATE VARIABILITY

KW - TEMPERATURE

KW - mänty

KW - päästöt

KW - terpeenit

KW - ilmakehä

KW - 411 Agriculture and forestry

M3 - Article

VL - 10

SP - 553

EP - 567

JO - Boreal Environment Research

JF - Boreal Environment Research

SN - 1239-6095

IS - 6

ER -