Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January–April 2016
<p>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 class="inline-formula&...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2019-01-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://www.atmos-meas-tech.net/12/599/2019/amt-12-599-2019.pdf |
| _version_ | 1819298168030887936 |
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| author | H. Irie H. M. S. Hoque A. Damiani H. Okamoto A. M. Fatmi P. Khatri T. Takamura T. Jarupongsakul |
| author_facet | H. Irie H. M. S. Hoque A. Damiani H. Okamoto A. M. Fatmi P. Khatri T. Takamura T. Jarupongsakul |
| author_sort | H. Irie |
| collection | DOAJ |
| description | <p>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 class="inline-formula"><sup>∘</sup></span> N, 102.56<span class="inline-formula"><sup>∘</sup></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 class="inline-formula">∼0.04</span> to <span class="inline-formula">∼0.03</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 class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M5" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>∼</mo><mn mathvariant="normal">0.15</mn><mo>±</mo><mn mathvariant="normal">0.03</mn></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="66pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="c587c0c25d56ee4aca9b077feec6bef1"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="amt-12-599-2019-ie00001.svg" width="66pt" height="10pt" src="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 class="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.</p> |
| first_indexed | 2024-12-24T05:25:36Z |
| format | Article |
| id | doaj.art-b15c6a5306664731a14784e628fc0f5e |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-12-24T05:25:36Z |
| publishDate | 2019-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-b15c6a5306664731a14784e628fc0f5e2022-12-21T17:13:20ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482019-01-011259960610.5194/amt-12-599-2019Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January–April 2016H. Irie0H. M. S. Hoque1A. Damiani2H. Okamoto3A. M. Fatmi4P. Khatri5T. Takamura6T. Jarupongsakul7Center for Environmental Remote Sensing, Chiba University, 1-33 Yayoicho, Inage-ku, Chiba 263-8522, JapanCenter for Environmental Remote Sensing, Chiba University, 1-33 Yayoicho, Inage-ku, Chiba 263-8522, JapanCenter for Environmental Remote Sensing, Chiba University, 1-33 Yayoicho, Inage-ku, Chiba 263-8522, JapanCenter for Environmental Remote Sensing, Chiba University, 1-33 Yayoicho, Inage-ku, Chiba 263-8522, JapanCenter for Environmental Remote Sensing, Chiba University, 1-33 Yayoicho, Inage-ku, Chiba 263-8522, JapanCenter for Atmospheric and Oceanic Studies, Graduate School of Science, Tohoku University, Sendai 980-8578, JapanCenter for Environmental Remote Sensing, Chiba University, 1-33 Yayoicho, Inage-ku, Chiba 263-8522, JapanDepartment of Geology, Faculty of Science, Chulalongkorn University, Phayathai Road, Bangkok 10330, Thailand<p>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 class="inline-formula"><sup>∘</sup></span> N, 102.56<span class="inline-formula"><sup>∘</sup></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 class="inline-formula">∼0.04</span> to <span class="inline-formula">∼0.03</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 class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M5" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>∼</mo><mn mathvariant="normal">0.15</mn><mo>±</mo><mn mathvariant="normal">0.03</mn></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="66pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="c587c0c25d56ee4aca9b077feec6bef1"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="amt-12-599-2019-ie00001.svg" width="66pt" height="10pt" src="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 class="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.</p>https://www.atmos-meas-tech.net/12/599/2019/amt-12-599-2019.pdf |
| spellingShingle | H. Irie H. M. S. Hoque A. Damiani H. Okamoto A. M. Fatmi P. Khatri T. Takamura T. Jarupongsakul Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January–April 2016 Atmospheric Measurement Techniques |
| title | Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January–April 2016 |
| title_full | Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January–April 2016 |
| title_fullStr | Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January–April 2016 |
| title_full_unstemmed | Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January–April 2016 |
| title_short | Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January–April 2016 |
| title_sort | simultaneous observations by sky radiometer and max doas for characterization of biomass burning plumes in central thailand in january april 2016 |
| url | https://www.atmos-meas-tech.net/12/599/2019/amt-12-599-2019.pdf |
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