Emissions of monoterpene from tropical Indian plant species and assessment of VOC emission from the forest of Haryana state

Singh, Abhai Pratap; Singh, Rashmi; Mina, Usha; Singh, M.P.; Varshney, C. K.

doi:10.5094/apr.2011.009

Cited by 24 publications

(16 citation statements)

References 24 publications

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“…1, the major plant species found in the city are Azadirachta indica, Polyalthia longifolia and Holoptelea integrifolia and Delonix regia (Limbochiya and Patel, 2013). The significant emissions of monoterpenes from the major plant such as Azadirachta indica and Delonix regia are reported in forested areas of Haryana state and Delhi in India (Padhy and Varshney, 2005;Singh et al, 2011). The list of trees also includes some high monoterpene emitters such as Mangifera indica, Syzygium cumini and Eucalyptus globulus.…”

Section: Measurement Site and Ptr-tof-ms Instrumentationmentioning

confidence: 99%

“…The measurements of BVOC emission rates from tropical plants are limited and are particularly lacking over the Indian subcontinent (Varshney and Singh, 2003). In India, emissions of isoprene from common plant species have been examined to some extent (Singh et al, 2011;Varshney and Singh, 2003). The present study is based on analysis of ambient mixing ratio data of monoterpenes measured using proton transfer reaction time of flight mass spectrometer (PTR-TOF-MS) instrument at an urban site of Ahmedabad in western India during February-March 2014.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Measurement Site and Ptr-tof-ms Instrumentationmentioning

confidence: 99%

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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“…For example, organics from post‐harvest paddy residue burning in the northwest IGP have been found to pose significant health risks to the local population (Chandra & Sinha, ; Sarkar et al, ). Biogenic VOC emissions are also likely to play a major role (Sahu & Saxena, ; Sahu et al, ; Singh et al, ; Sinha et al, ): The few published emission surveys for Indian trees ( A. Singh et al, ; Singh et al, ; Varshney & Singh, ) report high isoprene and monoterpene fluxes for many prevalent species. In Ahmedabad (India's fifth largest city), Sahu et al () attribute only ~45% of the wintertime acetaldehyde and acetone levels to anthropogenic sources—thus inferring an important role for biogenic emissions.…”

Section: Introductionmentioning

confidence: 99%

Constraining Emissions of Volatile Organic Compounds Over the Indian Subcontinent Using Space‐Based Formaldehyde Measurements

2019

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India is an air pollution mortality hot spot, but regional emissions are poorly understood. We present a high‐resolution nested chemical transport model (GEOS‐Chem) simulation for the Indian subcontinent and use it to interpret formaldehyde (HCHO) observations from two satellite sensors (OMI and GOME‐2A) in terms of constraints on regional volatile organic compound (VOC) emissions. We find modeled biogenic VOC emissions to be overestimated by ~30–60% for most locations and seasons, and derive a best estimate biogenic flux of 16 Tg C/year subcontinent‐wide for year 2009. Terrestrial vegetation provides approximately half the total VOC flux in our base‐case inversions (full uncertainty range: 44–65%). This differs from prior understanding, in which biogenic emissions represent >70% of the total. Our derived anthropogenic VOC emissions increase slightly (13–16% in the base case, for a subcontinent total of 15 Tg C/year in 2009) over RETRO year 2000 values, with some larger regional discrepancies. The optimized anthropogenic emissions agree well with the more recent CEDS inventory, both subcontinent‐wide (within 2%) and regionally. An exception is the Indo‐Gangetic Plain, where we find an underestimate for both RETRO and CEDS. Anthropogenic emissions thus constitute 37–50% of the annual regional VOC source in our base‐case inversions and exceed biogenic emissions over the Indo‐Gangetic Plain, West India, and South India, and over the entire subcontinent during winter and post‐monsoon. Fires are a minor fraction (<7%) of the total regional VOC source in the prior and optimized model. However, evidence suggests that VOC emissions in the fire inventory used here (GFEDv4) are too low over the Indian subcontinent.

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“…When we explore this issue in Indian subcontinent, there are a few reports regarding the emission of isoprene and monoterpenes from some Indian tropical plants (Malik, Gajbhiye, & Pandey, 2018;Singh, Singh, Mina, Singh, & Varshney, 2011;Singh, Singh, & Singh, 2014). However, there is no information on the seasonal variations of monoterpene emission rates and monthly compositions of monoterpenes from Indian tropical plants.…”

Section: Introductionmentioning

confidence: 99%

Some insights into composition and monoterpene emission rates from selected dominant tropical tree species of Central India: Plant‐specific seasonal variations

Malik

Gajbhiye

Pandey

2019

Ecological Research

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In this article, we discuss about the seasonal variations in the monoterpene emission rates and chemical composition of monoterpenes from selected tropical tree species of Central India. The highest normalized total average monoterpene emission rates (normalized at 30°C) from all the plant species were found in summer followed by rainy and winter seasons, respectively. The composition of individual monoterpene compounds emitted from all the tropical plant species showed significant seasonal variations. Nine monoterpene compounds were determined across three seasons from these selected plants: α‐pinene, β‐pinene, and limonene represented up to 72.6% of the total monoterpene emission. Although the main compounds emitted were α‐pinene, β‐pinene, and limonene, the other minor compounds were also found at varying emission rates. α‐Terpinene and carene were not observed in Eucalyptus globulus and Pongamia pinnata during winter and rainy seasons. Sabinene was only recorded from Azadirachta indica. We have thus observed clearly that the seasonal as well as monthly variations in chemical composition of monoterpene emission rate are species specific. Furthermore, the effect of environmental variables such as temperature (TEM), photosynthetically active radiation (PAR), relative humidity, and carbon dioxide from plant species in distinct seasons revealed that the monoterpene emissions were mainly temperature (TEM) and PAR dependent.

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Emissions of monoterpene from tropical Indian plant species and assessment of VOC emission from the forest of Haryana state

Cited by 24 publications

References 24 publications

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

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

Constraining Emissions of Volatile Organic Compounds Over the Indian Subcontinent Using Space‐Based Formaldehyde Measurements

Some insights into composition and monoterpene emission rates from selected dominant tropical tree species of Central India: Plant‐specific seasonal variations

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