Contribution of volatile organic compound fluxes to the ecosystem carbon budget of a poplar short‐rotation plantation

Portillo‐Estrada, Miguel; Zenone, Terenzio; Arriga, Nicola; Ceulemans, R.

doi:10.1111/gcbb.12506

Cited by 26 publications

(22 citation statements)

References 58 publications

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“…Other applications include the measurement of VOCs that characterize food flavor [ 30 ], indoor air quality studies [ 31 ], and breath analysis in medical research [ 32 ]. Accordingly, PTR-TOF-MS has potential application for bitumen research and the asphalt sector in monitoring VOC emissions at different steps of the production process [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

VOC Emission Analysis of Bitumen Using Proton-Transfer Reaction Time-Of-Flight Mass Spectrometry

et al. 2020

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Bitumen is one of the most important materials used in roads. During asphalt pavement construction, workers can be affected by emissions, such as volatile organic compounds (VOCs), when bitumen is heated. Therefore, it is crucial to correctly identify and measure VOCs. This paper presents a novel, promising method to determine VOC emissions. The proposed method offers a way to standardize routine measurements on a lab scale, enabling reliable comparison across bitumen types and their modifications or additives. A proton-transfer reaction time-of-flight mass spectrometer (PTR-TOF-MS) was used to monitor VOC emissions from commercial unmodified bitumen and crumb rubber modified bitumen (CRMB) with heating of up to 180 °C. Results confirmed that the temperature range of 160–180 °C is a highly influential factor for VOC emissions from heated commercial bitumen and particularly CRMB. A significant increase in alkane and aromatic emission was detected when the binders were heated to 180 °C. Sulfur-containing VOCs were almost nonexistent for the base bitumen fumes, while a significant increase was detected in the fumes when two different types of CR were added to the bitumen, even at 120 °C. The additional CR in the bituminous binder contributed to the potentially harmful VOC emission of benzothiazole, which belongs to the class of sulfur-containing compounds. The concentration of benzothiazole was 65%, 38%, and 35% higher for CR1 in comparison to CR2 at 140, 160, and 180 °C, respectively. It is clear from the results that this method allows different bitumen sources or modifications to be quickly analyzed and their VOC emissions cross-compared. If adopted and confirmed further, the method could offer the asphalt industry a viable solution to monitor VOC emissions by analyzing samples in real time at different steps of the production process.

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Section: Introductionmentioning

confidence: 99%

VOC Emission Analysis of Bitumen Using Proton-Transfer Reaction Time-Of-Flight Mass Spectrometry

et al. 2020

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“…An exhaustive description of the study site and its management as well as of the poplar materials has been previously published [15,16]. Poplars (Populus) are strong emitters of isoprene, as observed in canopy-scale studies for this plantation [17,18], with an annual return of assimilated carbon in the form of isoprene at around 0.3% [19]. This study focused on the growing season of the year 2016, the third and last year of the third rotation after the coppice in early 2014.…”

Section: Field Study Site and Sampling Protocolsmentioning

confidence: 99%

“…This study focused on the growing season of the year 2016, the third and last year of the third rotation after the coppice in early 2014. Foliar measurements were made between mid-July and the end of August 2016 in correspondence with the maximum growth period and to the peak of isoprene emissions [19]. Four field campaigns were performed during sunny (photosynthetically active radiation, PAR ≥ 900 µmol m −2 s −1 ) days.…”

Section: Field Study Site and Sampling Protocolsmentioning

confidence: 99%

“…All measurements at foliar level were made between 11:00 a.m. and 2:00 p.m. (CET), because isoprene emissions and PAR were highest at midday [17,19]. The leaf photosynthetic capacity (A max , µmol m −2 s −1 ) was measured with a portable CO 2 /H 2 O exchange system (LI-6400, LI-COR, Lincoln, NE, USA) by clamping leaves in a 6 cm 2 cuvette.…”

Section: Measurements Of Photosynthetic Capacity and Light-use Efficimentioning

confidence: 99%

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Assessing Ecosystem Isoprene Emissions by Hyperspectral Remote Sensing

et al. 2018

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This study examined the relationship between foliar isoprene emissions, light use efficiency and photochemical reflectance index (PRI) throughout the canopy profile and explored the contribution of xanthophyll cycle pigments versus other carotenoid pigments to the isoprene/PRI relationship. Foliar isoprene emissions within the canopy profile were measured in a high-density poplar plantation in Flanders (Belgium) during the 2016 growing season. The results confirmed that PRI was a promising estimator of isoprene emissions at canopy level. Interestingly, xanthophyll cycle pigments contributed more to isoprene biosynthesis than chlorophyll and drove the isoprene/PRI relationship. The simple independent pigment index and novel defined indices, such as the hyperspectral isoprene index and simple hyperspectral isoprene index, showed promising results and could be suitable estimators of isoprene emissions due to their strong relationship with the xanthophyll pool.

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“…are generally dependent upon solar radiation, temperature, relative humidity (RH) and concentration of carbon dioxide (CO 2 ) leading to substantial diurnal variability (Kesselmeier and Staudt, 1999;Portillo-Estrada et al, 2018) . Monoterpene emissions vary significantly between different plant species so the vegetation type has a large impact on total BVOC emissions from a region.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of biogenic emissions of VOCs in the semi-arid region of India during winter to summer transition period: Role of meteorological conditions

Sahu

2019

Preprint

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Abstract. Emissions of biogenic volatile organic compounds (BVOCs) play important roles in ecophysiology and atmospheric chemistry at large spatial and temporal scales. Tropical regions are a main global source of BVOCs and magnitude and chemical compositions are highly variable. This study is based on the measurements of monoterpenes using proton transfer reaction-time of flight-mass spectrometer (PTR-TOF-MS) at a semi-arid site in western India during the winter-to-summer transition. Mixing ratio of monoterpenes showed strong diurnal variation with elevated values from evening till midnight and lowest in the afternoon. The daily data does not show clear trends with monthly means of ~&#8201;0.35&#8201;ppbv during each month. Exceptionally high levels of 3&#8211;6&#8201;ppbv were measured during the sporadic biomass burning and bonfire event during Holi festival. The daytime data of monoterpenes do not clearly reflect the impact of biogenic emission due to the competing influences of mixing and OH-reaction loss. In the afternoon, the monoterpenes/benzene ratio of 0.43&#8201;ppbv&#8201;ppbv&#8722;1 in second half of March was ~&#8201;3 times higher than that in first half of February. It showed strong response with temperature as it increased from 0.27&#8201;ppbv&#8201;ppbv&#8722;1 (<&#8201;30&#8201;&#176;C) to 0.50&#8201;ppbv&#8201;ppbv&#8722;1 (>&#8201;30&#8201;&#176;C). The dependence with wind speed is represented by exponential decay but rate of decline in February was ~&#8201;2 times greater than that in March. The ratios of monoterpenes/isoprene in the night were significant higher than those during the day indicating light independent but temperature dependent emissions of monoterpenes. The nighttime MTs/isoprene ratio increased from 0.25&#8201;ppbv&#8201;ppbv&#8722;1 in the first half of February to 0.43&#8201;ppbv&#8201;ppbv&#8722;1 in the second half of March. Overall, the ratios of monoterpenes/isoprene agree with the values reported for a topical forest region in SE Asia. The estimated contribution from local biogenic sources to ambient monoterpenes increased from 31&#8201;% in first half of February to 67&#8201;% in second half of March. This trend suggests the increasing biogenic contribution from February to March. The NW winds and higher ambient temperatures in March favored the local emissions and regional transport of BVOCs.

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Contribution of volatile organic compound fluxes to the ecosystem carbon budget of a poplar short‐rotation plantation

Cited by 26 publications

References 58 publications

VOC Emission Analysis of Bitumen Using Proton-Transfer Reaction Time-Of-Flight Mass Spectrometry

VOC Emission Analysis of Bitumen Using Proton-Transfer Reaction Time-Of-Flight Mass Spectrometry

Assessing Ecosystem Isoprene Emissions by Hyperspectral Remote Sensing

Enhancement of biogenic emissions of VOCs in the semi-arid region of India during winter to summer transition period: Role of meteorological conditions

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