Are monoterpene emissions influenced by humidity?

Schade, Gunnar W.; Goldstein, Allen H.; Lamanna, Mark S.

doi:10.1029/1999gl900444

Cited by 106 publications

(90 citation statements)

References 26 publications

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“…The observed monoterpene emission peaks due to rain events ( Fig. 1a and c) as were observed before at the same site (Schade et al, 1999) were not captured by any of the simulation experiments. These peaks in emissions are likely caused by enhanced humidity of the air and a related uptake of water by the leaves (Llusià and Peñuelas, 1999;Schade et al, 1999).…”

Section: Simulated Monoterpene Emissionsmentioning

confidence: 71%

Process-based modelling of biogenic monoterpene emissions combining production and release from storage

et al. 2009

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Abstract. Monoterpenes, primarily emitted by terrestrial vegetation, can influence atmospheric ozone chemistry, and can form precursors for secondary organic aerosol. The short-term emissions of monoterpenes have been well studied and understood, but their long-term variability, which is particularly important for atmospheric chemistry, has not. This understanding is crucial for the understanding of future changes.In this study, two algorithms of terrestrial biogenic monoterpene emissions, the first one based on the shortterm volatilization of monoterpenes, as commonly used for temperature-dependent emissions, and the second one based on long-term production of monoterpenes (linked to photosynthesis) combined with emissions from storage, were compared and evaluated with measurements from a Ponderosa pine plantation (Blodgett Forest, California). The measurements were used to parameterize the long-term storage of monoterpenes, which takes place in specific storage organs and which determines the temporal distribution of the emissions over the year. The difference in assumptions between the first (emission-based) method and the second (production-based) method, which causes a difference in upscaling from instantaneous to daily emissions, requires roughly a doubling of emission capacities to bridge the gap to production capacities. The sensitivities to changes in temperature and light were tested for the new methods, the temperature sensitivity was slightly higher than that of the short-term temperature dependent algorithm.Correspondence to: G. Schurgers (guy.schurgers@nateko.lu.se) Applied on a global scale, the first algorithm resulted in annual total emissions of 29.6 Tg C a −1 , the second algorithm resulted in 31.8 Tg C a −1 when applying the correction factor 2 between emission capacities and production capacities. However, the exact magnitude of such a correction is spatially varying and hard to determine as a global average.

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Section: Simulated Monoterpene Emissionsmentioning

confidence: 71%

Process-based modelling of biogenic monoterpene emissions combining production and release from storage

et al. 2009

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“…However, Dement et al (1975) found similar humidity effects on camphor emissions from live and dead branches of California black sage (Salvia mellifera). Schade et al (1999) also observed increases in monoterpene emission from Pinus ponderosa with increasing relative humidity. Diem (2000) attributed humidity induced increases in BVOC emissions during the summer monsoon season to transition from VOC dependence of O 3 production to a NO X limited O 3 production regime in the Tucson area.…”

Section: Article In Pressmentioning

confidence: 73%

Biogenic volatile organic compound emissions from desert vegetation of the southwestern US

Geron

Guenther

Greenberg

et al. 2006

Atmospheric Environment

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Thirteen common plant species in the Mojave and Sonoran Desert regions of the western US were tested for emissions of biogenic non-methane volatile organic compounds (BVOCs). Only two of the species examined emitted isoprene at rates of 10 mg C g À1 h À1 or greater. These species accounted for o10% of the estimated vegetative biomass in these arid regions of low biomass density, indicating that these ecosystems are not likely a strong source of isoprene. However, isoprene emissions from these species continued to increase at much higher leaf temperatures than is observed from species in other ecosystems. Five species, including members of the Ambrosia genus, emitted monoterpenes at rates exceeding 2 mg C g À1 h À1 . Emissions of oxygenated compounds, such as methanol, ethanol, acetone/propanal, and hexanol, from cut branches of several species exceeded 10 mg C g À1 h À1 , warranting further investigation in these ecosystems. Model extrapolation of isoprene emission measurements verifies recently published observations that desert vegetation is a small source of isoprene relative to forests. Annual and daily total model isoprene emission estimates from an eastern US mixed forest landscape were 10-30 times greater than isoprene emissions estimated from the Mojave site. Monoterpene (and possibly oxygenated terpene and sesquiterpene) emissions may be more comparable, as annual forest terpene emission model estimates were 3-8 times greater than those from the Mojave Desert, and were within a factor of 2 for peak summertime fluxes. Primary productivity and leaf biomass of desert ecosystems are very dependent on annual precipitation, and our model results indicate that there can be at least a three-fold difference in total annual BVOC emissions between dry and wet years. We recommend additional studies of desert plant BVOC emissions, especially those that focus on sesquiterpenes, oxygenated compounds, and the effects of soil moisture, temperature, humidity, and seasonality. Landscape flux studies are needed to test BVOC model estimates and to verify BVOC influences on regional atmospheric chemistry. Published by Elsevier Ltd.

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“…RH and precipitation also have two opposing effects, since monoterpene emission rates not only increase at high humidity levels and during and after precipitation (Llusià and Peñuelas, 1999;Schade et al, 1999) but also cause a small decrease in the SPME extraction capacity (Sect. 3.1.3).…”

Section: Effect Of Meteorological Parameters On the Atmospheric Levelmentioning

confidence: 99%

Field measurements of biogenic volatile organic compounds in the atmosphere using solid-phase microextraction Arrow

Barreira¹,

Duporté

Rönkkö

et al. 2018

Atmos. Meas. Tech.

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Abstract. Biogenic volatile organic compounds (BVOCs) emitted by terrestrial vegetation participate in a diversity of natural processes. These compounds impact both shortrange processes, such as on plant protection and communication, and long-range processes, for example by participating in aerosol particle formation and growth. The biodiversity of plant species around the Earth, the vast assortment of emitted BVOCs, and their trace atmospheric concentrations contribute to the substantial remaining uncertainties about the effects of these compounds on atmospheric chemistry and physics, and call for the development of novel collection devices that can offer portability with improved selectivity and capacity. In this study, a novel solid-phase microextraction (SPME) Arrow sampling system was used for the static and dynamic collection of BVOCs from a boreal forest, and samples were subsequently analyzed on site by gas chromatography-mass spectrometry (GC-MS). This system offers higher sampling capacity and improved robustness when compared to traditional equilibrium-based SPME techniques, such as SPME fibers. Field measurements were performed in summer 2017 at the Station for Measuring Ecosystem-Atmosphere Relations (SMEAR II) in Hyytiälä, Finland. Complementary laboratory tests were also performed to compare the SPME-based techniques under controlled experimental conditions and to evaluate the effect of temperature and relative humidity on their extraction performance. The most abundant monoterpenes and aldehydes were successfully collected. A significant improvement on sampling capacity was observed with the new SPME Arrow system over SPME fibers, with collected amounts being approximately 2× higher for monoterpenes and 7-8× higher for aldehydes. BVOC species exhibited different affinities for the type of sorbent materials used (polydimethylsiloxane (PDMS)-carbon wide range (WR) vs. PDMS-divinylbenzene (DVB)). Higher extraction efficiencies were obtained with dynamic collection prior to equilibrium regime, but this benefit during the field measurements was small, probably due to the natural agitation provided by the wind. An increase in temperature and relative humidity caused a decrease in the amounts of analytes extracted under controlled experimental conditions, even though the effect was more significant for PDMS-carbon WR than for PDMS-DVB. Overall, results demonstrated the benefits and challenges of using SPME Arrow for the sampling of BVOCs in the atmosphere.

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Are monoterpene emissions influenced by humidity?

Cited by 106 publications

References 26 publications

Process-based modelling of biogenic monoterpene emissions combining production and release from storage

Process-based modelling of biogenic monoterpene emissions combining production and release from storage

Biogenic volatile organic compound emissions from desert vegetation of the southwestern US

Field measurements of biogenic volatile organic compounds in the atmosphere using solid-phase microextraction Arrow

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