Can I read Low-level isoprene observed during summertime at a forested mountaintop site in southern China: implications for strong regional atmospheric oxidative capacity on EtoBox?

Low-level isoprene observed during summertime at a forested mountaintop site in southern China: implications for strong regional atmospheric oxidative capacity by Gong, Daocheng ;Wang, Hao ;Zhang, Shenyang ;Wang, Yu ;Liu, Shaw ;Guo, Hai ;Shao, Min ;He, Congrong ;Chen, Duohong ;He, Lingyan ;Zhou, Lei ;Morawska, Lidia ;Zhang, Yuanhang ;Wang, Boguang is a scholarly article available to read on EtoBox.

What is Low-level isoprene observed during summertime at a forested mountaintop site in southern China: implications for strong regional atmospheric oxidative capacity about?

Abstract. To investigate the atmospheric oxidizing capacity in certain polluted isoprene-rich environments, such as the forests surrounding megacities. Here we present online observations of isoprene and its first-stage oxidation products methyl vinyl ketone (MVK) and methacrolein (MACR) in summer 2016 at a remote, high-altitude mountain forest site (1690 m a.s.l.) to the north of the air-polluted Pearl River Delta (PRD) region in southern China. The observed isoprene level was found to be significantly lower in comparison with other forest sites either in China or around the world, although the sampling site was surrounded with subtropical evergreen broad-leaved trees which are strong isoprene emitters. Also, high (MVK+MACR)/isoprene ratio was observed. Based on the observations, we hypothesized that the lower isoprene levels in the study forest might be attributable to a strong atmospheric oxidative capacity in relation to the elevated regional complex air pollution. High daytime OH and nighttime NO3 radical concentrations estimated by using a photochemical box model incorporating Master Chemical Mechanism (PBM-MCM), as well as calculated short atmospheric reaction times of isopr

Author

Gong, Daocheng ;Wang, Hao ;Zhang, Shenyang ;Wang, Yu ;Liu, Shaw ;Guo, Hai ;Shao, Min ;He, Congrong ;Chen, Duohong ;He, Lingyan ;Zhou, Lei ;Morawska, Lidia ;Zhang, Yuanhang ;Wang, Boguang

Publisher

Copernicus GmbH

Published

2018

Language

EN