Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January-April 2016

Hitoshi Irie; Hossain Mohammed Syedul Hoque; Alessandro Damiani; Hiroshi Okamoto; Al Mashroor Fatmi; Pradeep Khatri; Tamio Takamura; Thanawat Jarupongsakul

doi:10.5194/amt-12-599-2019

Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January-April 2016

Hitoshi Irie, Hossain Mohammed Syedul Hoque, Alessandro Damiani, Hiroshi Okamoto, Al Mashroor Fatmi, Pradeep Khatri, Tamio Takamura, Thanawat Jarupongsakul

理学研究科・附属大気海洋変動観測研究センター

研究成果: Article › 査読

16 被引用数 (Scopus)

抄録

The first intensive multicomponent ground-based remote-sensing observations by sky radiometer and multi-axis differential optical absorption spectroscopy (MAX-DOAS) were performed simultaneously at the SKYNET Phimai site located in central Thailand (15.18<span classCombining double low line"inline-formula">ĝ</span> N, 102.56<span classCombining double low line"inline-formula">ĝ</span> E) from January to April 2016. The period corresponds to the dry season associated with intense biomass burning (BB) activity around the site. The near-surface concentration of formaldehyde (HCHO) retrieved from MAX-DOAS was found to be a useful tracer for absorption aerosols from BB plumes, when BB was the dominant source of HCHO and absorption aerosols over other sources. As the HCHO concentration tripled from 3 to 9 ppbv, the ratio of gaseous glyoxal to HCHO concentrations in daytime decreased from <span classCombining double low line"inline-formula">ĝ1/40.04</span> to <span classCombining double low line"inline-formula">ĝ1/40.03</span>, responding presumably to the increased contribution of volatile organic compound emissions from BB. In addition, clear increases in aerosol absorption optical depths (AAODs) retrieved from sky radiometer observations were seen with the HCHO enhancement. At a HCHO of 9 ppbv, AAOD at a wavelength of 340 nm reached as high as <span classCombining double low line"inline-formula"><math xmlnsCombining double low line"http://www.w3.org/1998/Math/MathML" idCombining double low line"M5" displayCombining double low line"inline" overflowCombining double low line"scroll" dspmathCombining double low line"mathml"><mrow><mo>ĝ1/4</mo><mn mathvariantCombining double low line"normal">0.15</mn><mo>±</mo><mn mathvariantCombining double low line"normal">0.03</mn></mrow></math><span><svg:svg xmlns:svgCombining double low line"http://www.w3.org/2000/svg" widthCombining double low line"66pt" heightCombining double low line"10pt" classCombining double low line"svg-formula" dspmathCombining double low line"mathimg" md5hashCombining double low line"c587c0c25d56ee4aca9b077feec6bef1"><svg:image xmlns:xlinkCombining double low line"http://www.w3.org/1999/xlink" xlink:hrefCombining double low line"amt-12-599-2019-ie00001.svg" widthCombining double low line"66pt" heightCombining double low line"10pt" srcCombining double low line"amt-12-599-2019-ie00001.png"/></svg:svg></span></span>. The wavelength dependence of AAODs at 340-870 nm was quantified by the absorption Ångström exponent (AAE), providing evidence for the presence of brown carbon aerosols at an AAE of <span classCombining double low line"inline-formula">1.5±0.2</span>. Thus, our multicomponent observations around central Thailand are expected to provide unique constraints for understanding physical-chemical-optical properties of BB plumes.

本文言語	English
ページ（範囲）	599-606
ページ数	8
ジャーナル	Atmospheric Measurement Techniques
巻	12
号	1
DOI	https://doi.org/10.5194/amt-12-599-2019
出版ステータス	Published - 2019 1月 29

ASJC Scopus subject areas

大気科学

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10.5194/amt-12-599-2019

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引用スタイル

Irie, H., Mohammed Syedul Hoque, H., Damiani, A., Okamoto, H., Mashroor Fatmi, A., Khatri, P., Takamura, T., & Jarupongsakul, T. (2019). Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January-April 2016. Atmospheric Measurement Techniques, 12(1), 599-606. https://doi.org/10.5194/amt-12-599-2019

Irie, H, Mohammed Syedul Hoque, H, Damiani, A, Okamoto, H, Mashroor Fatmi, A, Khatri, P, Takamura, T & Jarupongsakul, T 2019, 'Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January-April 2016', Atmospheric Measurement Techniques, vol. 12, no. 1, pp. 599-606. https://doi.org/10.5194/amt-12-599-2019

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title = "Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January-April 2016",

abstract = "The first intensive multicomponent ground-based remote-sensing observations by sky radiometer and multi-axis differential optical absorption spectroscopy (MAX-DOAS) were performed simultaneously at the SKYNET Phimai site located in central Thailand (15.18ĝ N, 102.56ĝ E) from January to April 2016. The period corresponds to the dry season associated with intense biomass burning (BB) activity around the site. The near-surface concentration of formaldehyde (HCHO) retrieved from MAX-DOAS was found to be a useful tracer for absorption aerosols from BB plumes, when BB was the dominant source of HCHO and absorption aerosols over other sources. As the HCHO concentration tripled from 3 to 9 ppbv, the ratio of gaseous glyoxal to HCHO concentrations in daytime decreased from ĝ1/40.04 to ĝ1/40.03, responding presumably to the increased contribution of volatile organic compound emissions from BB. In addition, clear increases in aerosol absorption optical depths (AAODs) retrieved from sky radiometer observations were seen with the HCHO enhancement. At a HCHO of 9 ppbv, AAOD at a wavelength of 340 nm reached as high as ĝ1/40.15±0.03. The wavelength dependence of AAODs at 340-870 nm was quantified by the absorption {\AA}ngstr{\"o}m exponent (AAE), providing evidence for the presence of brown carbon aerosols at an AAE of 1.5±0.2. Thus, our multicomponent observations around central Thailand are expected to provide unique constraints for understanding physical-chemical-optical properties of BB plumes.",

author = "Hitoshi Irie and {Mohammed Syedul Hoque}, Hossain and Alessandro Damiani and Hiroshi Okamoto and {Mashroor Fatmi}, Al and Pradeep Khatri and Tamio Takamura and Thanawat Jarupongsakul",

note = "Funding Information: Acknowledgements. Support from Vijak Pangsapa and the Bureau of Royal Rainmaking in Agricultural Aviaion (BRRAA) is gratefully acknowledged. This work was supported by JSPS KAKENHI grant number JP16K00512, JSPS KAKENHI grant number JP15H01728, and JST CREST grant number JPMJCR15K4. Publisher Copyright: {\textcopyright} Author(s) 2019.",

year = "2019",

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doi = "10.5194/amt-12-599-2019",

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AU - Irie, Hitoshi

AU - Mohammed Syedul Hoque, Hossain

AU - Damiani, Alessandro

AU - Okamoto, Hiroshi

AU - Mashroor Fatmi, Al

AU - Khatri, Pradeep

AU - Takamura, Tamio

AU - Jarupongsakul, Thanawat

N1 - Funding Information: Acknowledgements. Support from Vijak Pangsapa and the Bureau of Royal Rainmaking in Agricultural Aviaion (BRRAA) is gratefully acknowledged. This work was supported by JSPS KAKENHI grant number JP16K00512, JSPS KAKENHI grant number JP15H01728, and JST CREST grant number JPMJCR15K4. Publisher Copyright: © Author(s) 2019.

PY - 2019/1/29

Y1 - 2019/1/29

N2 - The first intensive multicomponent ground-based remote-sensing observations by sky radiometer and multi-axis differential optical absorption spectroscopy (MAX-DOAS) were performed simultaneously at the SKYNET Phimai site located in central Thailand (15.18ĝ N, 102.56ĝ E) from January to April 2016. The period corresponds to the dry season associated with intense biomass burning (BB) activity around the site. The near-surface concentration of formaldehyde (HCHO) retrieved from MAX-DOAS was found to be a useful tracer for absorption aerosols from BB plumes, when BB was the dominant source of HCHO and absorption aerosols over other sources. As the HCHO concentration tripled from 3 to 9 ppbv, the ratio of gaseous glyoxal to HCHO concentrations in daytime decreased from ĝ1/40.04 to ĝ1/40.03, responding presumably to the increased contribution of volatile organic compound emissions from BB. In addition, clear increases in aerosol absorption optical depths (AAODs) retrieved from sky radiometer observations were seen with the HCHO enhancement. At a HCHO of 9 ppbv, AAOD at a wavelength of 340 nm reached as high as ĝ1/40.15±0.03. The wavelength dependence of AAODs at 340-870 nm was quantified by the absorption Ångström exponent (AAE), providing evidence for the presence of brown carbon aerosols at an AAE of 1.5±0.2. Thus, our multicomponent observations around central Thailand are expected to provide unique constraints for understanding physical-chemical-optical properties of BB plumes.

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