Spatiotemporal variability of biogenic terpenoid emissions in Pearl River Delta, China, with high-resolution land-cover and meteorological data

Xuemei Wang; Shuping Situ; Alex Guenther; Fei Chen; Zhiyong Wu; Beicheng Xia; Tijian Wang

doi:10.1111/j.1600-0889.2011.00523.x

Spatiotemporal variability of biogenic terpenoid emissions in Pearl River Delta, China, with high-resolution land-cover and meteorological data

Tellus B: Chemical and Physical Meteorology

Volume 63 (2011): Issue 2

By: Xuemei Wang, Shuping Situ, Alex Guenther, Fei Chen, Zhiyong Wu, Beicheng Xia and Tijian Wang

Open Access

|Jan 2011

Abstract

This study intended to provide 4-km gridded, hourly, year-long, regional estimates of terpenoid emissions in the Pearl River Delta (PRD), China. It combined Thematic Mapper images and local-survey data to characterize plant functional types, and used observed emission potential of biogenic volatile organic compounds (BVOC) from local plant species and high-resolution meteorological outputs from theMM5model to constrain theMEGAN BVOC-emission model. The estimated annual emissions for isoprene, monoterpene and sesquiterpene are 95.55 × 10⁶ kg C, 117.35 × 10⁶ kg C and 9.77 × 10⁶ kg C, respectively. The results show strong variabilities of terpenoid emissions spanning diurnal and seasonal time scales, which are mainly distributed in the remote areas (with more vegetation and less economic development) in PRD. Using MODIS PFTs data reduced terpenoid emissions by 27% in remote areas. Using MEGAN-model default emission factors led to a 24% increase in BVOC emission. The model errors of temperature and radiation in MM5 output were used to assess impacts of uncertainties in meteorological forcing on emissions: increasing (decreasing) temperature and downward shortwave radiation produces more (less) terpenoid emissions for July and January. Strong temporal variability of terpenoid emissions leads to enhanced ozone formation during midday in rural areas where the anthropogenic VOC emissions are limited.

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Articles in this issue

DOI: https://doi.org/10.1111/j.1600-0889.2011.00523.x | Journal eISSN: 1600-0889

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Language: English

Page range: 241 - 254

Submitted on: Mar 24, 2010

Accepted on: Dec 13, 2010

Published on: Jan 1, 2011

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 2011 Xuemei Wang, Shuping Situ, Alex Guenther, Fei Chen, Zhiyong Wu, Beicheng Xia, Tijian Wang, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 63 (2011): Issue 2