Articles | Volume 23, issue 13
https://doi.org/10.5194/acp-23-7839-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-23-7839-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
14 Jul 2023
Research article |
| 14 Jul 2023
| 14 Jul 2023
Vertical distribution of sources and sinks of volatile organic compounds within a boreal forest canopy
Ross Petersen
Department of Physical Geography and Ecosystem Science, Lund
University, Lund, Sweden
Thomas Holst
CORRESPONDING AUTHOR
Department of Physical Geography and Ecosystem Science, Lund
University, Lund, Sweden
Meelis Mölder
Department of Physical Geography and Ecosystem Science, Lund
University, Lund, Sweden
Natascha Kljun
Centre for Environmental and Climate Science, Lund University, Lund,
Sweden
Janne Rinne
Department of Physical Geography and Ecosystem Science, Lund
University, Lund, Sweden
Natural Resources Institute Finland (Luke), Helsinki, Finland
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Revised manuscript not accepted
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Amy Hrdina, Jennifer G. Murphy, Anna Gannet Hallar, John C. Lin, Alexander Moravek, Ryan Bares, Ross C. Petersen, Alessandro Franchin, Ann M. Middlebrook, Lexie Goldberger, Ben H. Lee, Munkh Baasandorj, and Steven S. Brown
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Paul C. Stoy, Adam A. Cook, John E. Dore, Natascha Kljun, William Kleindl, E. N. Jack Brookshire, and Tobias Gerken
Biogeosciences, 18, 961–975, https://doi.org/10.5194/bg-18-961-2021, https://doi.org/10.5194/bg-18-961-2021, 2021
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The reintroduction of American bison creates multiple environmental benefits. Ruminants like bison also emit methane – a potent greenhouse gas – to the atmosphere, which has not been measured to date in a field setting. We measured methane efflux from an American bison herd during winter using eddy covariance. Automated cameras were used to approximate their location to calculate per-animal flux. From the measurements, bison do not emit more methane than the cattle they often replace.
Jan Pisek, Angela Erb, Lauri Korhonen, Tobias Biermann, Arnaud Carrara, Edoardo Cremonese, Matthias Cuntz, Silvano Fares, Giacomo Gerosa, Thomas Grünwald, Niklas Hase, Michal Heliasz, Andreas Ibrom, Alexander Knohl, Johannes Kobler, Bart Kruijt, Holger Lange, Leena Leppänen, Jean-Marc Limousin, Francisco Ramon Lopez Serrano, Denis Loustau, Petr Lukeš, Lars Lundin, Riccardo Marzuoli, Meelis Mölder, Leonardo Montagnani, Johan Neirynck, Matthias Peichl, Corinna Rebmann, Eva Rubio, Margarida Santos-Reis, Crystal Schaaf, Marius Schmidt, Guillaume Simioni, Kamel Soudani, and Caroline Vincke
Biogeosciences, 18, 621–635, https://doi.org/10.5194/bg-18-621-2021, https://doi.org/10.5194/bg-18-621-2021, 2021
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Understory vegetation is the most diverse, least understood component of forests worldwide. Understory communities are important drivers of overstory succession and nutrient cycling. Multi-angle remote sensing enables us to describe surface properties by means that are not possible when using mono-angle data. Evaluated over an extensive set of forest ecosystem experimental sites in Europe, our reported method can deliver good retrievals, especially over different forest types with open canopies.
Camille Yver-Kwok, Carole Philippon, Peter Bergamaschi, Tobias Biermann, Francescopiero Calzolari, Huilin Chen, Sebastien Conil, Paolo Cristofanelli, Marc Delmotte, Juha Hatakka, Michal Heliasz, Ove Hermansen, Kateřina Komínková, Dagmar Kubistin, Nicolas Kumps, Olivier Laurent, Tuomas Laurila, Irene Lehner, Janne Levula, Matthias Lindauer, Morgan Lopez, Ivan Mammarella, Giovanni Manca, Per Marklund, Jean-Marc Metzger, Meelis Mölder, Stephen M. Platt, Michel Ramonet, Leonard Rivier, Bert Scheeren, Mahesh Kumar Sha, Paul Smith, Martin Steinbacher, Gabriela Vítková, and Simon Wyss
Atmos. Meas. Tech., 14, 89–116, https://doi.org/10.5194/amt-14-89-2021, https://doi.org/10.5194/amt-14-89-2021, 2021
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The Integrated Carbon Observation System (ICOS) is a pan-European research infrastructure which provides harmonized and high-precision scientific data on the carbon cycle and the greenhouse gas (GHG) budget. All stations have to undergo a rigorous assessment before being labeled, i.e., receiving approval to join the network. In this paper, we present the labeling process for the ICOS atmospheric network through the 23 stations that were labeled between November 2017 and November 2019.
Roger Seco, Thomas Holst, Mikkel Sillesen Matzen, Andreas Westergaard-Nielsen, Tao Li, Tihomir Simin, Joachim Jansen, Patrick Crill, Thomas Friborg, Janne Rinne, and Riikka Rinnan
Atmos. Chem. Phys., 20, 13399–13416, https://doi.org/10.5194/acp-20-13399-2020, https://doi.org/10.5194/acp-20-13399-2020, 2020
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Northern ecosystems exchange climate-relevant trace gases with the atmosphere, including volatile organic compounds (VOCs). We measured VOC fluxes from a subarctic permafrost-free fen and its adjacent lake in northern Sweden. The graminoid-dominated fen emitted mainly isoprene during the peak of the growing season, with a pronounced response to increasing temperatures stronger than assumed by biogenic emission models. The lake was a sink of acetone and acetaldehyde during both periods measured.
Cited articles
Aalto, J., Kolari, P., Hari, P., Kerminen, V.-M., Schiestl-Aalto, P., Aaltonen, H., Levula, J., Siivola, E., Kulmala, M., and Bäck, J.: New foliage growth is a significant, unaccounted source for volatiles in boreal evergreen forests, Biogeosciences, 11, 1331–1344, https://doi.org/10.5194/bg-11-1331-2014, 2014.
Aaltonen, H., Pumpanen, J., Pihlatie, M., Hakola, H., Hellén, H.,
Kulmala, L., Vesala, T., and Bäck, J.: Boreal pine forest floor biogenic
volatile organic compound emissions peak in early summer and autumn, Agr.
Forest Met., 151, 682–691, 2011.
Amin, H., Atkins, P. T., Russo, R. S., Brown, A. W., Sive, B., Hallar, A.
G., and Huff Hartz, K. E.: Effect of bark beetle infestation on secondary
organic aerosol precursor emissions, Environ. Sci. Technol., 46, 5696–5703,
2012.
Andreae, M. O. and Crutzen, P. J.: Atmospheric aerosols: Biogeochemical
sources and role in atmospheric chemistry, Science, 276, 1052–1058, 1997.
Arneth, A., Schurgers, G., Lathiere, J., Duhl, T., Beerling, D. J., Hewitt, C. N., Martin, M., and Guenther, A.: Global terrestrial isoprene emission models: sensitivity to variability in climate and vegetation, Atmos. Chem. Phys., 11, 8037–8052, https://doi.org/10.5194/acp-11-8037-2011, 2011.
Aubinet, M., Feigenwinter, C., Heinesch, B., Laffineur, Q., Papale, D.,
Reichstein, M., Rinne, J., and Gorsel, E. V.: Nighttime flux correction, in:
Eddy covariance, Springer, 133–157, 2012.
Bäck, J., Aalto, J., Henriksson, M., Hakola, H., He, Q., and Boy, M.: Chemodiversity of a Scots pine stand and implications for terpene air concentrations, Biogeosciences, 9, 689–702, https://doi.org/10.5194/bg-9-689-2012, 2012.
Chameides, W., Fehsenfeld, F., Rodgers, M., Cardelino, C., Martinez, J.,
Parrish, D., Lonneman, W., Lawson, D., Rasmussen, R., and Zimmerman, P.:
Ozone precursor relationships in the ambient atmosphere, J. Geophys. Res.
Atmos., 97, 6037–6055, 1992.
Chameides, W. L.: Acid dew and the role of chemistry in the dry deposition
of reactive gases to wetted surfaces, J. Geophys. Res.-Atmos., 92,
11895–11908, 1987.
Cleveland, W., Grosse, E., and Shyu, W.: Local regression models, Chapter 8,
in: Statistical models in S, edited by: Chambers, J. M. and Hastie, J. T.,
Wadsworth & Brooks/Cole, Pacific Grove, CA, 608 pp, 1992.
Cojocariu, C., Kreuzwieser, J., and Rennenberg, H.: Correlation of
short-chained carbonyls emitted from Picea abies with physiological and
environmental parameters, New Phytol., 162, 717–727, 2004.
Collins, W., Derwent, R., Johnson, C., and Stevenson, D.: The oxidation of
organic compounds in the troposphere and their global warming potentials,
Clim. Change, 52, 453–479, 2002.
Copolovici, L. O. and Niinemets, Ü.: Temperature dependencies of Henry's
law constants and octanol/water partition coefficients for key plant
volatile monoterpenoids, Chemosphere, 61, 1390–1400, 2005.
FAO: Global Forest Resources Assessment 2020, Rome, Italy, 184,
https://doi.org/10.4060/ca8753en, 2020.
Fehsenfeld, F., Calvert, J., Fall, R., Goldan, P., Guenther, A. B., Hewitt,
C. N., Lamb, B., Liu, S., Trainer, M., and Westberg, H.: Emissions of
volatile organic compounds from vegetation and the implications for
atmospheric chemistry, Global Biogeochem. Cy., 6, 389–430, 1992.
Galbally, I. E. and Kirstine, W.: The production of methanol by flowering
plants and the global cycle of methanol, J. Atmos. Chem., 43, 195–229, 2002.
Ghirardo, A., Koch, K., Taipale, R., Zimmer, I., Schnitzler, J. P., and
Rinne, J.: Determination of de novo and pool emissions of terpenes from four
common boreal/alpine trees by 13CO2 labelling and PTR-MS analysis, Plant
Cell Environ., 33, 781–792, 2010.
Goldberg, V. and Bernhofer, Ch.: Quantifying the coupling degree between land surface and the atmospheric boundary layer with the coupled vegetation-atmosphere model HIRVAC, Ann. Geophys., 19, 581–587, https://doi.org/10.5194/angeo-19-581-2001, 2001.
Guenther, A., Hewitt, C. N., Erickson, D., Fall, R., Geron, C., Graedel, T.,
Harley, P., Klinger, L., Lerdau, M., and McKay, W.: A global model of
natural volatile organic compound emissions, J. Geophys. Res., 100,
8873–8892, 1995.
Guenther, A. B., Zimmerman, P. R., Harley, P. C., Monson, R. K., and Fall,
R.: Isoprene and monoterpene emission rate variability: model evaluations
and sensitivity analyses, J. Geophys. Res.-Atmos., 98, 12609–12617, 1993.
Hakola, H., Tarvainen, V., Praplan, A. P., Jaars, K., Hemmilä, M., Kulmala, M., Bäck, J., and Hellén, H.: Terpenoid and carbonyl emissions from Norway spruce in Finland during the growing season, Atmos. Chem. Phys., 17, 3357–3370, https://doi.org/10.5194/acp-17-3357-2017, 2017.
Holst, T., Arneth, A., Hayward, S., Ekberg, A., Mastepanov, M., Jackowicz-Korczynski, M., Friborg, T., Crill, P. M., and Bäckstrand, K.: BVOC ecosystem flux measurements at a high latitude wetland site, Atmos. Chem. Phys., 10, 1617–1634, https://doi.org/10.5194/acp-10-1617-2010, 2010.
Hüve, K., Christ, M., Kleist, E., Uerlings, R., Niinemets, Ü.,
Walter, A., and Wildt, J.: Simultaneous growth and emission measurements
demonstrate an interactive control of methanol release by leaf expansion and
stomata, J. Exp. Bot., 58, 1783–1793, 2007.
Jardine, K. J., Sommer, E. D., Saleska, S. R., Huxman, T. E., Harley, P. C.,
and Abrell, L.: Gas phase measurements of pyruvic acid and its volatile
metabolites, Environ. Sci. Technol., 44, 2454-2460, 2010.
Jarvis, P. G. and McNaughton, K.: Stomatal control of transpiration: scaling
up from leaf to region, in: Adv. Ecol. Res., Elsevier, 1–49, 1986.
Kainulainen, P. and Holopainen, J.: Concentrations of secondary compounds in
Scots pine needles at different stages of decomposition, Soil Biol.
Biochem., 34, 37–42, 2002.
Karl, T., Curtis, A., Rosenstiel, T., Monson, R., and Fall, R.: Transient
releases of acetaldehyde from tree leaves- products of a pyruvate overflow
mechanism?, Plant Cell Environ., 25, 1121–1131, 2002.
Karl, T., Potosnak, M., Guenther, A., Clark, D., Walker, J., Herrick, J. D.,
and Geron, C.: Exchange processes of volatile organic compounds above a
tropical rain forest: Implications for modeling tropospheric chemistry above
dense vegetation, J. Geophys. Res.-Atmos., 109, D18306, https://doi.org/10.1029/2004JD004738, 2004.
Kljun, N., Calanca, P., Rotach, M., and Schmid, H. P.: A simple
two-dimensional parameterisation for Flux Footprint Prediction (FFP),
Geosci. Instrum. Dev., 8, 3695–3713, 2015.
Kreuzwieser, J., Scheerer, U., and Rennenberg, H.: Metabolic origin of
acetaldehyde emitted by poplar (Populus tremula × P. alba) trees, J.
Exp. Bot., 50, 757–765, 1999.
Kreuzwieser, J., Kühnemann, F., Martis, A., Rennenberg, H., and Urban,
W.: Diurnal pattern of acetaldehyde emission by flooded poplar trees,
Physiol. Plant., 108, 79–86, 2000.
Lagergren, F., Eklundh, L., Grelle, A., Lundblad, M., Mölder, M.,
Lankreijer, H., and Lindroth, A.: Net primary production and light use
efficiency in a mixed coniferous forest in Sweden, Plant Cell Environ., 28,
412–423, 2005.
Liedvogel, B. and Stumpf, P. K.: Origin of acetate in spinach leaf cell,
Plant Physiol., 69, 897–903, 1982.
Lindfors, V. and Laurila, T.: Biogenic volatile organic compound (VOC)
emissions from forests in Finland, Boreal Environ. Res., 5, 95–113, 2000.
Lindinger, W., Hansel, A., and Jordan, A.: On-line monitoring of volatile
organic compounds at pptv levels by means of proton-transfer-reaction mass
spectrometry (PTR-MS) medical applications, food control and environmental
research, Int. J. Mass Spectrom. Ion Proc., 173, 191–241, 1998.
Lindroth, A., Grelle, A., and Morén, A. S.: Long-term measurements of
boreal forest carbon balance reveal large temperature sensitivity, Global
Change Biol., 4, 443–450, 1998.
Loreto, F. and Schnitzler, J.-P.: Abiotic stresses and induced BVOCs, Trends
Plant Sci., 15, 154–166, 2010.
Lundin, L.-C., Halldin, S., Lindroth, A., Cienciala, E., Grelle, A., Hjelm,
P., Kellner, E., Lundberg, A., Mölder, M., and Morén, A.-S.:
Continuous long-term measurements of soil-plant-atmosphere variables at a
forest site, Agr. Forest Met., 98, 53–73, 1999.
Macdonald, R. C. and Fall, R.: Acetone emission from conifer buds,
Phytochemistry, 34, 991–994, 1993a.
MacDonald, R. C. and Fall, R.: Detection of substantial emissions of
methanol from plants to the atmosphere, Atmos. Environ., 27, 1709–1713,
1993b.
Mäki, M., Aalto, J., Hellén, H., Pihlatie, M., and Bäck, J.:
Interannual and seasonal dynamics of volatile organic compound fluxes from
the boreal forest floor, Front. Plant Sci., 10, 191, https://doi.org/10.3389/fpls.2019.00191, 2019a.
Mäki, M., Aaltonen, H., Heinonsalo, J., Hellén, H., Pumpanen, J.,
and Bäck, J.: Boreal forest soil is a significant and diverse source of
volatile organic compounds, Plant Soil, 441, 89–110, 2019b.
McKeen, S., Gierczak, T., Burkholder, J., Wennberg, P., Hanisco, T., Keim,
E., Gao, R. S., Liu, S., Ravishankara, A., and Fahey, D.: The photochemistry
of acetone in the upper troposphere: A source of odd-hydrogen radicals,
Geophys. Res. Lett., 24, 3177–3180, 1997.
Menke, W.: Geophysical data analysis: Discrete inverse theory, Elsevier,
Amsterdam, ISBN 0128135565, 2018.
Mölder, M.: Ecosystem meteo time series (ICOS Sweden), Norunda, 2013-12-31–2014-12-31, Swedish National Network [data set], https://hdl.handle.net/11676/yG6UlHP3q-neb9LtWzJDjS19, 2021a.
Mölder, M.: Ecosystem meteo time series (ICOS Sweden), Norunda, 2014-12-31–2015-12-31, Swedish National Network [data set], https://hdl.handle.net/11676/SdShYH4bm2EnI7aVkb1mNGhP, 2021b.
Mölder, M.: Ecosystem meteo time series (ICOS Sweden), Norunda, 2015-12-31–2016-12-31, Swedish National Network [data set], https://hdl.handle.net/11676/WXPGw0vFQSn0sbTJfcfyIr-8, 2021c.
Mölder, M.: Ecosystem fluxes time series (ICOS Sweden), Norunda, 2013-12-31–2015-12-31, Swedish National Network [data set], https://hdl.handle.net/11676/qyMU6743pCyzN4O1W3QySiaN, 2021d.
Mölder, M.: Ecosystem fluxes time series (ICOS Sweden), Norunda, 2015-12-31–2016-12-31, Swedish National Network [data set], https://hdl.handle.net/11676/zy5KP3RE5jZYP7IQ-gjn4nqs, 2021e.
Mölder, M., Klemedtsson, L., and Lindroth, A.: Turbulence
characteristics and dispersion in a forest – tests of Thomson's
random-flight model, Agr. Forest Met., 127, 203–222, 2004.
Nemitz, E., Sutton, M. A., Gut, A., San José, R., Husted, S., and
Schjoerring, J. K.: Sources and sinks of ammonia within an oilseed rape
canopy, Agr. Forest Met., 105, 385–404, 2000.
Niinemets, Ü.: Mild versus severe stress and BVOCs: thresholds, priming
and consequences, Trends Plant Sci., 15, 145–153, 2010.
Niinemets, Ü. and Monson, R. K.: Biology, controls and models of tree
volatile organic compound emissions, Springer, ISBN 9400766068, 2013.
Niinemets, Ü. and Reichstein, M.: Controls on the emission of plant
volatiles through stomata: Differential sensitivity of emission rates to
stomatal closure explained, J. Geophys. Res.-Atmos., 108, 4208, https://doi.org/10.1029/2002JD002620, 2003.
Noe, S., Copolovici, L., Niinemets, Ü., and Vaino, E.: Foliar limonene
uptake scales positively with leaf lipid content: “non-emitting” species
absorb and release monoterpenes, Plant Biol., 9, 79–86, 2007.
Ouwersloot, H. G., Vilà-Guerau de Arellano, J., Nölscher, A. C., Krol, M. C., Ganzeveld, L. N., Breitenberger, C., Mammarella, I., Williams, J., and Lelieveld, J.: Characterization of a boreal convective boundary layer and its impact on atmospheric chemistry during HUMPPA-COPEC-2010, Atmos. Chem. Phys., 12, 9335–9353, https://doi.org/10.5194/acp-12-9335-2012, 2012.
Paasonen, P., Asmi, A., Petäjä, T., Kajos, M. K., Äijälä, M., Junninen, H., Holst, T., Abbatt, J. P., Arneth, A., Birmili, W., van der Gon, H. D., Hamed, A., Hoffer, A., Laakso, L., Laaksonen, A., Leaitch, W. R., Plass-Dülmer, C., Prylor, S. C., Räisänen, P., Swietlicki, E., Wiedensohler, A., Worsnop, D. R., Kerminen, V.-M., and Kulmala, M.: Warming-induced increase in aerosol number concentration likely to moderate climate change, Nat. Geosci., 6, 438–442, 2013.
Rantala, P., Aalto, J., Taipale, R., Ruuskanen, T. M., and Rinne, J.: Annual cycle of volatile organic compound exchange between a boreal pine forest and the atmosphere, Biogeosciences, 12, 5753–5770, https://doi.org/10.5194/bg-12-5753-2015, 2015.
Rantala, P., Taipale, R., Aalto, J., Kajos, M. K., Patokoski, J., Ruuskanen,
T. M., and Rinne, J.: Continuous flux measurements of VOCs using
PTR-MS – reliability and feasibility of disjunct-eddy-covariance,
surface-layer-gradient, and surface-layer-profile methods, Boreal Environ.
Res., 19, 87–107, 2014.
Raupach, M.: Applying Lagrangian fluid mechanics to infer scalar source
distributions from concentration profiles in plant canopies, Agr. Forest
Met., 47, 85–108, 1989.
Raupach, M., Coppin, P., and Legg, B.: Experiments on scalar dispersion
within a model plant canopy part I: The turbulence structure, Bound. Lay.
Meteorol., 35, 21–52, 1986.
Rebmann, C., Aubinet, M., Schmid, H., Arriga, N., Aurela, M., Burba, G.,
Clement, R., De Ligne, A., Fratini, G., and Gielen, B.: ICOS eddy covariance
flux-station site setup: a review, Int. Agrophys., 32, 471–494, 2018.
Rinne, J., Bäck, J., and Hakola, H.: Biogenic volatile organic compound
emissions from the Eurasian taiga: current knowledge and future directions,
Boreal Environ. Res., 14, 807–826, 2009.
Rinne, J., Ruuskanen, T. M., Reissell, A., Taipale, R., Hakola, H., and
Kulmala, M.: On-line PTR-MS measurements of atmospheric concentrations of
volatile organic compounds in a European boreal forest ecosystem, Boreal
Environ. Res., 10, 425–436, 2005.
Rinne, J., Taipale, R., Markkanen, T., Ruuskanen, T. M., Hellén, H., Kajos, M. K., Vesala, T., and Kulmala, M.: Hydrocarbon fluxes above a Scots pine forest canopy: measurements and modeling, Atmos. Chem. Phys., 7, 3361–3372, https://doi.org/10.5194/acp-7-3361-2007, 2007.
Rinne, J., Markkanen, T., Ruuskanen, T. M., Petäjä, T., Keronen, P., Tang, M. J., Crowley, J. N., Rannik, Ü., and Vesala, T.: Effect of chemical degradation on fluxes of reactive compounds – a study with a stochastic Lagrangian transport model, Atmos. Chem. Phys., 12, 4843–4854, https://doi.org/10.5194/acp-12-4843-2012, 2012.
Roberts, J. M., Flocke, F., Stroud, C. A., Hereid, D., Williams, E.,
Fehsenfeld, F., Brune, W., Martinez, M., and Harder, H.: Ground-based
measurements of peroxycarboxylic nitric anhydrides (PANs) during the 1999
Southern Oxidants Study Nashville Intensive, J. Geophys. Res.-Atmos., 107,
ACH 1-1-ACH 1-10, 2002.
Roldin, P., Ehn, M., Kurtén, T., Olenius, T., Rissanen, M. P., Sarnela,
N., Elm, J., Rantala, P., Hao, L., and Hyttinen, N.: The role of highly
oxygenated organic molecules in the Boreal aerosol-cloud-climate system,
Nat. Commun., 10, 4370, https://doi.org/10.1038/s41467-019-12338-8, 2019.
Ruuskanen, T. M., Taipale, R., Rinne, J., Kajos, M. K., Hakola, H., and Kulmala, M.: Quantitative long-term measurements of VOC concentrations by PTR-MS: annual cycle at a boreal forest site, Atmos. Chem. Phys. Discuss., 9, 81–134, https://doi.org/10.5194/acpd-9-81-2009, 2009.
Schade, G. W. and Goldstein, A. H.: Increase of monoterpene emissions from a
pine plantation as a result of mechanical disturbances, Geophys. Res. Lett.,
30, 1380, https://doi.org/10.1029/2002GL016138, 2003.
Schurgers, G., Arneth, A., Holzinger, R., and Goldstein, A. H.: Process-based modelling of biogenic monoterpene emissions combining production and release from storage, Atmos. Chem. Phys., 9, 3409–3423, https://doi.org/10.5194/acp-9-3409-2009, 2009.
Seco, R., Penuelas, J., and Filella, I.: Short-chain oxygenated VOCs:
Emission and uptake by plants and atmospheric sources, sinks, and
concentrations, Atmos. Environ., 41, 2477–2499, 2007.
Seinfeld, J. H. and Pandis, S. N.: Atmospheric chemistry and physics: from
air pollution to climate change, John Wiley & Sons, ISBN 1118591364, 2016.
Simpson, D., Winiwarter, W., Börjesson, G., Cinderby, S., Ferreiro, A.,
Guenther, A., Hewitt, C. N., Janson, R., Khalil, M. A. K., and Owen, S.:
Inventorying emissions from nature in Europe, J. Geophys. Res.-Atmos., 104,
8113-08152, 1999.
Siqueira, M., Katul, G., and Lai, C.-T.: Quantifying net ecosystem exchange
by multilevel ecophysiological and turbulent transport models, Adv. Water Res., 25,
13570–1366, 2002.
Siqueira, M., Lai, C. T., and Katul, G.: Estimating scalar sources, sinks,
and fluxes in a forest canopy using Lagrangian, Eulerian, and hybrid inverse
models, J. Geophys. Res.-Atmos., 105, 29475–29488, 2000.
Siqueira, M., Leuning, R., Kolle, O., Kelliher, F., and Katul, G.: Modelling
sources and sinks of CO2, H2O and heat within a Siberian pine forest using
three inverse methods, Quarterly Journal of the Royal Meteorological
Society: A journal of the atmospheric sciences, applied meteorology and
physical oceanography, Q. J. Roy. Meteor. Soc., 129, 1373–1393, 2003.
Steinbacher, M., Dommen, J., Ammann, C., Spirig, C., Neftel, A., and Prevot,
A.: Performance characteristics of a proton-transfer-reaction mass
spectrometer (PTR-MS) derived from laboratory and field measurements, Int.
J. Mass Spec., 239, 117–128, 2004.
Taipale, R., Kajos, M. K., Patokoski, J., Rantala, P., Ruuskanen, T. M., and Rinne, J.: Role of de novo biosynthesis in ecosystem scale monoterpene emissions from a boreal Scots pine forest, Biogeosciences, 8, 2247–2255, https://doi.org/10.5194/bg-8-2247-2011, 2011.
Tani, A., Hayward, S., and Hewitt, C.: Measurement of monoterpenes and
related compounds by proton transfer reaction-mass spectrometry (PTR-MS),
Int. J. Mass Spec., 223, 561–578, 2003.
Tarvainen, V., Hakola, H., Rinne, J., Hellén, H., and Haapanala, S.:
Towards a comprehensive emission inventory of terpenoids from boreal
ecosystems, Tellus B, 59, 526–534, 2007.
Thomsen, D., Elm, J., Rosati, B., Skønager, J. T., Bilde, M., and
Glasius, M.: Large discrepancy in the formation of secondary organic
aerosols from structurally similar monoterpenes, ACS Earth Space
Chem., 5, 632–644, 2021.
Tingey, D. T., Manning, M., Grothaus, L. C., and Burns, W. F.: Influence of
light and temperature on monoterpene emission rates from slash pine, Plant
Physiol., 65, 797–801, 1980.
Vilà-Guerau de Arellano, J., van den Dries, K., and Pino, D.: On inferring isoprene emission surface flux from atmospheric boundary layer concentration measurements, Atmos. Chem. Phys., 9, 3629–3640, https://doi.org/10.5194/acp-9-3629-2009, 2009.
Wang, M., Schurgers, G., Arneth, A., Ekberg, A., and Holst, T.: Seasonal
variation in biogenic volatile organic compound (BVOC) emissions from Norway
spruce in a Swedish boreal forest, Boreal Environ. Res., 22, 353–367, 2017.
Wang, M., Schurgers, G., Hellén, H., Lagergren, F., and Holst, T.:
Biogenic volatile organic compound emissions from a boreal forest floor,
Boreal Environ. Res., 23, 249–265, 2018.
Warland, J. S. and Thurtell, G. W.: A Lagrangian solution to the
relationship between a distributed source and concentration profile,
Bound. Lay. Meteorol., 96, 453–471, 2000.
Wilson, J. D. and Flesch, T. K.: Flow boundaries in random-flight dispersion
models: enforcing the well-mixed condition, J. Appl. Meteorol. Clim., 32, 1695–1707, 1993.
Wohlfahrt, G., Amelynck, C., Ammann, C., Arneth, A., Bamberger, I., Goldstein, A. H., Gu, L., Guenther, A., Hansel, A., Heinesch, B., Holst, T., Hörtnagl, L., Karl, T., Laffineur, Q., Neftel, A., McKinney, K., Munger, J. W., Pallardy, S. G., Schade, G. W., Seco, R., and Schoon, N.: An ecosystem-scale perspective of the net land methanol flux: synthesis of micrometeorological flux measurements, Atmos. Chem. Phys., 15, 7413–7427, https://doi.org/10.5194/acp-15-7413-2015, 2015.
Zhou, P., Ganzeveld, L., Taipale, D., Rannik, Ü., Rantala, P., Rissanen, M. P., Chen, D., and Boy, M.: Boreal forest BVOC exchange: emissions versus in-canopy sinks, Atmos. Chem. Phys., 17, 14309–14332, https://doi.org/10.5194/acp-17-14309-2017, 2017.
Short summary
We investigate variability in the vertical distribution of volatile organic compounds (VOCs) in boreal forest, determined through multiyear measurements at several heights in a boreal forest in Sweden. VOC source/sink seasonality in canopy was explored using these vertical profiles and with measurements from a collection of sonic anemometers on the station flux tower. Our results show seasonality in the source/sink distribution for several VOCs, such as monoterpenes and water-soluble compounds.
We investigate variability in the vertical distribution of volatile organic compounds (VOCs) in...
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