Analysis of observed surface ozone in the dry season over Eastern Thailand during 1997-2012

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Assareh N., Prabamroong T., Manomaiphiboon K., Theramongkol P., Leungsakul S., Mitrjit N., Rachiwong J.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2016

วารสาร: Atmospheric Research (0169-8095)

Volume number: 178-179

หน้าแรก: 17

หน้าสุดท้าย: 30

จำนวนหน้า: 14

นอก: 0169-8095

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84961937779&doi=10.1016%2fj.atmosres.2016.03.009&partnerID=40&md5=c3d52ba77d22c72e0aad4d7b5b0795e3

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

This study analyzed observed surface ozone (O3) in the dry season over a long-term period of 1997-2012 for the eastern region of Thailand and incorporated several technical tools or methods in investigating different aspects of O3. The focus was the urbanized and industrialized coastal areas recently recognized as most O3-polluted areas. It was found that O3 is intensified most in the dry-season months when meteorological conditions are favorable to O3 development. The diurnal variations of O3 and its precursors show the general patterns of urban background. From observational O3 isopleth diagrams and morning ratios of non-methane volatile organic compounds (NMVOC) and nitrogen oxides (NOx), the chemical regime of O3 formation was identified as VOC-sensitive, and the degree of VOC sensitivity tends to increase over the years, suggesting emission control on VOC to be suitable for O3 management. Both total oxidant analysis and back-trajectory modeling (together with K-means clustering) indicate the potential role of regional transport or influence in enhancing surface O3 level over the study areas. A meteorological adjustment with generalized linear modeling was performed to statistically exclude meteorological effects on the variability of O3. Local air-mass recirculation factor was included in the modeling to support the coastal application. The derived trends in O3 based on the meteorological adjustment were found to be significantly positive using a Mann-Kendall test with block bootstrapping. ฉ 2016 Elsevier B.V..

คำสำคัญ

Air quality, Back trajectory, Generalized linear model, Meteorological adjustment, Total oxidant, Trajectory clustering