Temporal variation of VOC fluxes measured with PTR-TOF above a boreal forest

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Between April and June 2013 fluxes of volatile organic compounds (VOCs) were measured in a Scots pine and Norway spruce forest using the eddy covariance (EC) method with a proton transfer reaction time-of-flight (PTR-TOF) mass spectrometer. The observations were performed above a boreal forest at the SMEAR II site in southern Finland.

We found a total of 25 different compounds with exchange and investigated their seasonal variations from spring to summer. The majority of the net VOC flux was comprised of methanol, monoterpenes, acetone and butene + butanol. The butene + butanol emissions were concluded to not originate from the forest and, therefore, be anthropogenic. The VOC exchange followed a seasonal trend and the emissions increased from spring to summer. Only three compounds were emitted during the snowmelt while in summer emissions of some 19 VOCs were observed. During the measurement period in April, the emissions were dominated by butene + butanol, while during the start of the growing season and in summer, methanol was the most emitted compound. The main source of methanol was likely the growth of new biomass. During a 21-day period in June, the net VOC flux was 2.1 nmolm 2 s(-1). This is on the lower end of PTR-TOF flux measurements from other ecosystems, which range from 2 to 10 nmolm 2 s(-1). The EC flux results were compared with surface layer profile measurements, using a proton transfer reaction quadrupole mass spectrometer, which is perman
Original languageEnglish
JournalAtmospheric Chemistry and Physics
Volume18
Issue number2
Pages (from-to)815-832
Number of pages18
ISSN1680-7316
DOIs
Publication statusPublished - 23 Jan 2018
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 114 Physical sciences
  • 4112 Forestry
  • VOLATILE ORGANIC-COMPOUNDS
  • PROTON-TRANSFER-REACTION
  • SCOTS PINE FOREST
  • SCALE MONOTERPENE EMISSIONS
  • EDDY-COVARIANCE
  • SEASONAL-VARIATION
  • MS MEASUREMENTS
  • DE-NOVO
  • GC-MS
  • ATMOSPHERE

Cite this

@article{056d099180d54a4fa858cd2d7dcc711a,
title = "Temporal variation of VOC fluxes measured with PTR-TOF above a boreal forest",
abstract = "Between April and June 2013 fluxes of volatile organic compounds (VOCs) were measured in a Scots pine and Norway spruce forest using the eddy covariance (EC) method with a proton transfer reaction time-of-flight (PTR-TOF) mass spectrometer. The observations were performed above a boreal forest at the SMEAR II site in southern Finland.We found a total of 25 different compounds with exchange and investigated their seasonal variations from spring to summer. The majority of the net VOC flux was comprised of methanol, monoterpenes, acetone and butene + butanol. The butene + butanol emissions were concluded to not originate from the forest and, therefore, be anthropogenic. The VOC exchange followed a seasonal trend and the emissions increased from spring to summer. Only three compounds were emitted during the snowmelt while in summer emissions of some 19 VOCs were observed. During the measurement period in April, the emissions were dominated by butene + butanol, while during the start of the growing season and in summer, methanol was the most emitted compound. The main source of methanol was likely the growth of new biomass. During a 21-day period in June, the net VOC flux was 2.1 nmolm 2 s(-1). This is on the lower end of PTR-TOF flux measurements from other ecosystems, which range from 2 to 10 nmolm 2 s(-1). The EC flux results were compared with surface layer profile measurements, using a proton transfer reaction quadrupole mass spectrometer, which is perman",
keywords = "114 Physical sciences, 4112 Forestry, VOLATILE ORGANIC-COMPOUNDS, PROTON-TRANSFER-REACTION, SCOTS PINE FOREST, SCALE MONOTERPENE EMISSIONS, EDDY-COVARIANCE, SEASONAL-VARIATION, MS MEASUREMENTS, DE-NOVO, GC-MS, ATMOSPHERE",
author = "Simon Schallhart and Rantala, {Pekka Antti Ilmari} and Kajos, {Maija Karoliina} and Aalto, {Juho Antton} and Ivan Mammarella and Ruuskanen, {Taina Maria} and Kulmala, {Markku Tapio}",
year = "2018",
month = "1",
day = "23",
doi = "10.5194/acp-18-815-2018",
language = "English",
volume = "18",
pages = "815--832",
journal = "Atmospheric Chemistry and Physics",
issn = "1680-7316",
publisher = "COPERNICUS GESELLSCHAFT MBH",
number = "2",

}

Temporal variation of VOC fluxes measured with PTR-TOF above a boreal forest. / Schallhart, Simon; Rantala, Pekka Antti Ilmari; Kajos, Maija Karoliina; Aalto, Juho Antton; Mammarella, Ivan; Ruuskanen, Taina Maria; Kulmala, Markku Tapio.

In: Atmospheric Chemistry and Physics, Vol. 18, No. 2, 23.01.2018, p. 815-832.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Temporal variation of VOC fluxes measured with PTR-TOF above a boreal forest

AU - Schallhart, Simon

AU - Rantala, Pekka Antti Ilmari

AU - Kajos, Maija Karoliina

AU - Aalto, Juho Antton

AU - Mammarella, Ivan

AU - Ruuskanen, Taina Maria

AU - Kulmala, Markku Tapio

PY - 2018/1/23

Y1 - 2018/1/23

N2 - Between April and June 2013 fluxes of volatile organic compounds (VOCs) were measured in a Scots pine and Norway spruce forest using the eddy covariance (EC) method with a proton transfer reaction time-of-flight (PTR-TOF) mass spectrometer. The observations were performed above a boreal forest at the SMEAR II site in southern Finland.We found a total of 25 different compounds with exchange and investigated their seasonal variations from spring to summer. The majority of the net VOC flux was comprised of methanol, monoterpenes, acetone and butene + butanol. The butene + butanol emissions were concluded to not originate from the forest and, therefore, be anthropogenic. The VOC exchange followed a seasonal trend and the emissions increased from spring to summer. Only three compounds were emitted during the snowmelt while in summer emissions of some 19 VOCs were observed. During the measurement period in April, the emissions were dominated by butene + butanol, while during the start of the growing season and in summer, methanol was the most emitted compound. The main source of methanol was likely the growth of new biomass. During a 21-day period in June, the net VOC flux was 2.1 nmolm 2 s(-1). This is on the lower end of PTR-TOF flux measurements from other ecosystems, which range from 2 to 10 nmolm 2 s(-1). The EC flux results were compared with surface layer profile measurements, using a proton transfer reaction quadrupole mass spectrometer, which is perman

AB - Between April and June 2013 fluxes of volatile organic compounds (VOCs) were measured in a Scots pine and Norway spruce forest using the eddy covariance (EC) method with a proton transfer reaction time-of-flight (PTR-TOF) mass spectrometer. The observations were performed above a boreal forest at the SMEAR II site in southern Finland.We found a total of 25 different compounds with exchange and investigated their seasonal variations from spring to summer. The majority of the net VOC flux was comprised of methanol, monoterpenes, acetone and butene + butanol. The butene + butanol emissions were concluded to not originate from the forest and, therefore, be anthropogenic. The VOC exchange followed a seasonal trend and the emissions increased from spring to summer. Only three compounds were emitted during the snowmelt while in summer emissions of some 19 VOCs were observed. During the measurement period in April, the emissions were dominated by butene + butanol, while during the start of the growing season and in summer, methanol was the most emitted compound. The main source of methanol was likely the growth of new biomass. During a 21-day period in June, the net VOC flux was 2.1 nmolm 2 s(-1). This is on the lower end of PTR-TOF flux measurements from other ecosystems, which range from 2 to 10 nmolm 2 s(-1). The EC flux results were compared with surface layer profile measurements, using a proton transfer reaction quadrupole mass spectrometer, which is perman

KW - 114 Physical sciences

KW - 4112 Forestry

KW - VOLATILE ORGANIC-COMPOUNDS

KW - PROTON-TRANSFER-REACTION

KW - SCOTS PINE FOREST

KW - SCALE MONOTERPENE EMISSIONS

KW - EDDY-COVARIANCE

KW - SEASONAL-VARIATION

KW - MS MEASUREMENTS

KW - DE-NOVO

KW - GC-MS

KW - ATMOSPHERE

U2 - 10.5194/acp-18-815-2018

DO - 10.5194/acp-18-815-2018

M3 - Article

VL - 18

SP - 815

EP - 832

JO - Atmospheric Chemistry and Physics

JF - Atmospheric Chemistry and Physics

SN - 1680-7316

IS - 2

ER -