An inventory of biogenic volatile organic compounds for a subtropical urban–rural complex

Chang, Jie; Ren, Yuan; Shi, Yan; Zhu, Yu; Ge, Ying-En; Hong, Sang-Bum; Li, Jiao; Lin, Fengmei; Peng, Changhui; Mochizuki, Takafumi; Tani, Atsushi; Mu, Ying; Fu, Cheng-Xin

doi:10.1016/j.atmosenv.2012.03.053

Cited by 31 publications

(31 citation statements)

References 42 publications

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“…In summary, for the BER results for all tree species included in the present study, 82% of BER were within a factor of two of emission rates for these species reported in the literature (Benjamin et al, 1996;Chang et al, 2012;Kesselmeier and Staudt, 1999;Nowak et al, 2002). Isoprene was seen in one tree species; all other tree species had isoprene emission rates that were below our detection limit of~0.01 mg g À1 h À1 .…”

Section: Valley Forge Elm (U Americana L 'Valley Forge')supporting

confidence: 54%

“…Emission rates for isoprene were determined to be 0.14 (0.01, 0.29) mg g À1 h À1 , a relatively low value for isoprene emission (e.g., oak trees exhibit isoprene emission rates on the order of 700e800 times what was observed here for London planetree (Geron et al, 2001;Guenther et al, 1993;Sharkey et al, 1996)). Chang et al (2012) reported an isoprene emission rate of 8.9 mg C g À1 h À1 for London planetree in the Greater Hangzhou Area of China. Benjamin et al (1996) reported a value of 19.2 mg g À1 h À1 for the same species in Southern California.…”

Section: London Planetree (Platanus â Acerifolia Aiton Willd)mentioning

confidence: 99%

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Biogenic volatile organic compound emissions from nine tree species used in an urban tree-planting program

Curtis

Helmig

Baroch

et al. 2014

Atmospheric Environment

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Section: Valley Forge Elm (U Americana L 'Valley Forge')supporting

confidence: 54%

Section: London Planetree (Platanus â Acerifolia Aiton Willd)mentioning

confidence: 99%

Biogenic volatile organic compound emissions from nine tree species used in an urban tree-planting program

Curtis

Helmig

Baroch

et al. 2014

Atmospheric Environment

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“…These two regions were both urban green parks with high vegetation coverage. Moreover, the primary tree species in these two regions, Liquidambar formosana and Cinnamomum camphora, respectively, are the major contributors to the emissions of isoprene and monoterpene (Chang et al, 2012), favoring the formation of O 3 . Air masses from Prince Bay Park and West Lake famous scenic spot were confirmed to be transported to the NRCS site during warmer seasons, as illustrated in Figs.…”

Section: Interspecies Correlationsmentioning

confidence: 99%

Characterization of atmospheric trace gases and particulate matter in Hangzhou, China

Zhang

et al. 2018

Atmos. Chem. Phys.

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Abstract. The Yangtze River Delta (YRD) is one of the most densely populated regions in China with severe air quality issues that have not been fully understood. Thus, in this study, based on 1-year (2013) continuous measurement at a National Reference Climatological Station (NRCS, 30.22 • N, 120.17 • E; 41.7 m a.s.l.) in the center of Hangzhou in the YRD, we investigated the seasonal characteristics, interspecies relationships, and the local emissions and the regional potential source contributions of trace gases (including O 3 , NO x , NO y , SO 2 , and CO) and particulate matter (PM 2.5 and PM 10 ). Results revealed that severe two-tier air pollution (photochemical and haze pollution) occurred in this region, with frequent exceedances in O 3 (38 days) and PM 2.5 (62 days). O 3 and PM 2.5 both exhibited distinct seasonal variations with reversed patterns: O 3 reaching a maximum in warm seasons (May and July) but PM 2.5 reaching a maximum in cold seasons (November to January). The overall results from interspecies correlation indicated a strong local photochemistry favoring the O 3 production under a volatile organic compound (VOC)-limited regime, whereas it moved towards an optimum O 3 production zone during warm seasons, accompanied by the formation of secondary fine particulates under high O 3 . The emission maps of PM 2.5 , CO, NO x , and SO 2 demonstrated that local emissions were significant for these species on a seasonal scale. The contributions from the regional transport among inland cities (Zhejiang, Jiangsu, Anhui, and Jiangxi Province) on a seasonal scale were further confirmed to be crucial to air pollution at the NRCS site by using backward trajectory simulations. Air masses transported from the offshore areas of the Yellow Sea, East Sea, and South Sea were also found to be highly relevant to the elevated O 3 at the NRCS site through the analysis of potential source contribution function (PSCF). Case studies of photochemical pollution (O 3 ) and haze (PM 2.5 ) episodes both suggested the combined importance of local atmospheric photochemistry and synoptic conditions during the accumulation (related with anticyclones) and dilution process (related with cyclones). Apart from supplementing a general picture of the air pollution state in the city of Hangzhou in the YRD region, this study specifically elucidates the role of local emission and regional transport, and it interprets the physical and photochemical processes during haze and photochemical pollution episodes. Moreover, this work suggests that cross-regional control measures are crucial to improve air quality in the YRD region, and it further emphasizes the importance of local thermally induced circulation for air quality.

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“…Moreover, the primary tree species in these two regions are Liquidambar formosana and Cinnamomum camphora, respectively, as major contributor to the emissions of isoprene and monoterpene (Chang et al, 2012), favoring the formation of O 3 . Air masses from Prince Bay Park and West Lake famous scenic spot were confirmed to be transported to NRCS site during warmer seasons, as illustrated in Fig.…”

Section: Inter-species Correlationsmentioning

confidence: 99%

Characterization of atmospheric trace gases and particle matters in Hangzhou, China

Zhang¹,

Xu²,

Qi³

et al. 2017

Preprint

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Abstract. The Yangtze River Delta (YRD) is one of the most densely populated regions in China with severe air quality issues, which has not been fully understood. Thus, in this study, based on one-year (2013) continuous measurement at a National Reference Climatological Station (NRCS, 30.22&#176;&#8201;N, 120.17&#176;&#8201;E, 41.7&#8201;m&#8201;a.s.l.) in the center of Hangzhou in the YRD, we investigated the seasonal characteristics, interspecies relationships, and the local emissions and the regional potential source contributions of trace gases (including O3, NOx, NOy, SO2 and CO) and particulate matters (PM2.5 and PM10). Results revealed severe two-tier air pollution (photochemical and haze pollution) occurred in this region, with frequent exceedances in O3 (38 days) and PM2.5 (62 days). O3 and PM2.5 both exhibited distinct seasonal variations with reversed patterns: O3 reaching a maximum in warm seasons (May and July) but PM2.5 in cold seasons (November to January). The overall results from interspecies correlation indicated a strong local photochemistry favoring the O3 production under a volatile organic compound (VOC)-limited regime, whereas it moved towards an optimum O3 production zone during warm seasons, accompanying with a formation of secondary fine particles under high O3. The emission maps of PM2.5, CO, NOx, and SO2 demonstrated that local emissions were both significant for these species on seasonal scale. The contributions from the regional transports among inland cities (Zhejiang, Jiangsu, Anhui, and Jiangxi Province) on seasonal scale were further confirmed to be crucial to air pollution at NRCS site by using the backward trajectories simulations. Air masses transported from Yellow Sea, East Sea, and South Sea were also found to be highly relevant to the elevated pollutants, especially for NOx and O3. Case studies of photochemical pollution (O3) and haze (PM2.5) episodes both suggested the combined importance of local atmospheric photochemistry and synoptic conditions during the accumulation (related with anticyclones) and dilution process (related with cyclones). This study supplements a general picture of the air pollution state in the YRD region, specifically elucidates the role of local emission and regional transport, and interprets the physical and photochemical processes during haze and photochemical pollution episodes. Moreover, this work suggests that cross-regional control measures are crucial to improve air quality in the YRD region, and further emphasizes the importance of local thermally induced circulation on air quality.

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An inventory of biogenic volatile organic compounds for a subtropical urban–rural complex

Cited by 31 publications

References 42 publications

Biogenic volatile organic compound emissions from nine tree species used in an urban tree-planting program

Biogenic volatile organic compound emissions from nine tree species used in an urban tree-planting program

Characterization of atmospheric trace gases and particulate matter in Hangzhou, China

Characterization of atmospheric trace gases and particle matters in Hangzhou, China

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