OMI satellite observed formaldehyde column from 2006 to 2015 over Xishuangbanna, southwest China, and validation using ground based zenith-sky DOAS

Rui Liu; Tao Feng; Shanshan Wang; Chanzhen Shi; Yanlin Guo; Jialiang Nan; Yun Deng; Bin Zhou

doi:10.1016/j.scitotenv.2017.08.210

OMI satellite observed formaldehyde column from 2006 to 2015 over Xishuangbanna, southwest China, and validation using ground based zenith-sky DOAS

Sci Total Environ. 2018 Feb 1:613-614:168-175. doi: 10.1016/j.scitotenv.2017.08.210. Epub 2017 Sep 14.

Authors

Rui Liu¹, Tao Feng², Shanshan Wang³, Chanzhen Shi⁴, Yanlin Guo⁵, Jialiang Nan⁵, Yun Deng⁶, Bin Zhou⁷

Affiliations

¹ Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, China; School of Resource and Environment, Yunnan University, Yunnan 650000, China.
² School of Information Science, Yunnan University of Finance and Economics, Yunnan 650000, China.
³ Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, China. Electronic address: shanshanwang@fudan.edu.cm.
⁴ Shanghai Institute of Measurement Testing Technology, Shanghai 200233, China.
⁵ Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, China.
⁶ Xishuangbanna Tropical Botanical Garden of Chinese Academy of Sciences, Yunnan 666100, China.
⁷ Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, China; Fudan Tyndall Centre, Fudan University, Shanghai 200433, China. Electronic address: binzhou@fudan.edu.cn.

PMID: 28917166
DOI: 10.1016/j.scitotenv.2017.08.210

Abstract

Formaldehyde (HCHO) provides a proxy to reveal the isoprene and biogenic volatile organic compounds emission which plays important roles in atmospheric chemical process and climate change. The ground-based observation with zenith-sky DOAS is carried out in order to validate the HCHO columns from OMI. It has a good correlation of 0.71678 between the HCHO columns from two sources. Then we use the OMI HCHO columns from January 2006 to December 2015 to indicate the interannual variation and spatial distribution in Xishuangbanna. The HCHO concentration peaks appeared in March or April for each year significantly corresponding to the intensive fire counts at the same time, which illustrate that the high HCHO columns are strongly influenced by the biomass burning in spring. Temperature and precipitation are also the important influence factors in the seasonal variation when there is nearly no biomass burning. The spatial patterns over the past ten years strengthen the deduction from the temporal variation and show the relationship with land cover and land use, elevation and population density. It is concluded that the biogenic activity plays a role in controlling the background level of HCHO in Xishuangbanna, while biomass burning is the main driving force of high HCHO concentration. And forests are greater contributor to HCHO rather than rubber trees which cover over 20% of the land in the region. Moreover, uncertainties from HCHO slant column retrieval and AMFs calculation are discussed in detail.

Keywords: Biomass burning; DOAS; Land use and land cover; OMI HCHO; Population.