Investigating the impact of Glyoxal retrieval from MAX-DOAS observations during haze and non-haze conditions in Beijing.

Air Pollutants / analysis Beijing China Environmental Monitoring / methods Glyoxal / analysis Spectrum Analysis
DOAS Glyoxal Haze days Photolysis Retrieval settings

Journal

Journal of environmental sciences (China)
ISSN: 1001-0742
Titre abrégé: J Environ Sci (China)
Pays: Netherlands
ID NLM: 100967627

Informations de publication

Date de publication:
Jun 2019
Historique:
received: 08 06 2018
revised: 08 01 2019
accepted: 09 01 2019
entrez: 7 4 2019
pubmed: 7 4 2019
medline: 13 4 2019
Statut: ppublish

Résumé

This study presents the Multi Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements for Glyoxal (CHOCHO) in Beijing, China (39.95°N, 116.32°E). CHOCHO is the smallest compound of di-carbonyl group. As a primary sink of CHOCHO, its photolysis with NOx (oxides of nitrogen) results in the production of tropospheric ozone. Therefore, the focus of CHOCHO DOAS measurements is increasing in trend. We did the measurements from 09 May 2017 to 09 September 2017. The study was conducted to compare different retrieval settings in order to reveal best DOAS fit settings for CHOCHO; furthermore, effect of haze and non-haze days on CHOCHO concentration was examined. The root mean square of residual and Differential Slant Column density (dSCD) error was reduced when measurements were done with lower wavelength limit around 432-438 nm and upper intervals around 455-460 nm. Thus, lower wavelength intervals around 432-438 nm and upper intervals around 457-460 nm were best for the retrieval of dSCDs for CHOCHO. Meteorological conditions like haze or non-haze days did not have significant effect on DOAS fit parameters. The CHOCHO vertical column densities range from 1.33E+14 to 9.77E+14 molecules/cm

Identifiants

DOI: 10.1016/j.jes.2019.01.008 PMID: 30952347
pubmed: 30952347
pii: S1001-0742(18)31510-9
doi: 10.1016/j.jes.2019.01.008
pii:
doi:

Substances chimiques

Air Pollutants 0
Glyoxal 50NP6JJ975

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

296-305

Informations de copyright

Copyright © 2019. Published by Elsevier B.V.

Auteurs

Zeeshan Javed (Z)

School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China. Electronic address: zeeshan@mail.ustc.edu.cn.

Cheng Liu (C)

School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Key Lab of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; Anhui Province Key Laboratory of Polar Environment and Global Change, USTC, Hefei 230026, China. Electronic address: chliu81@ustc.edu.cn.

Muhammad Fahim Khokhar (MF)

Institute of Environmental Sciences and Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan. Electronic address: khokhar@iese.nust.edu.pk.

Chengzhi Xing (C)

School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China.

Wei Tan (W)

Key Lab of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.

Muhammad Ahmed Subhani (MA)

Institute of Environmental Sciences and Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan.

Abdul Rehman (A)

School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China.

Aimon Tanvir (A)

Institute of Environmental Sciences and Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan.

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Classifications MeSH

questionsmedicales.fr › Actions chimiques et utilisations › Actions toxiques › Polluants environnementaux › Polluants atmosphériques › Investigating the impact of Glyoxal retrieval...
questionsmedicales.fr › Régions géographiques › Villes › Pékin › Investigating the impact of Glyoxal retrieval...
questionsmedicales.fr › Régions géographiques › Asie › Extrême-Orient › Chine › Investigating the impact of Glyoxal retrieval...
questionsmedicales.fr › Environnement et santé publique › Santé publique › Pratiques en santé publique › Surveillance de l'environnement › Investigating the impact of Glyoxal retrieval...
questionsmedicales.fr › Composés chimiques organiques › Aldéhydes › Glyoxal › Investigating the impact of Glyoxal retrieval...
questionsmedicales.fr › Techniques d'investigation › Techniques de chimie analytique › Analyse spectrale › Investigating the impact of Glyoxal retrieval...