Cause of a Lower‐Tropospheric High‐Ozone Layer in Spring Over Hanoi

Ogino, S.‐Y.; Miyazaki, K.; Fujiwara, M.; Nodzu, M. I.; Shiotani, M.; Hasebe, F.; Matsumoto, J.; Witte, J.; Thompson, A. M.; Nguyen‐Thi, H. A.; Nguyen, T. V.

Cause of a Lower‐Tropospheric High‐Ozone Layer in Spring Over Hanoi

Ogino, S.‐Y.; Miyazaki, K.; Fujiwara, M. et al.

Journal of Geophysical Research: Atmospheres, 2022, 127(10), e2021JD035727

Permalink : https://hdl.handle.net/2115/90912

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アクセス権	open access
URI	https://hdl.handle.net/2115/90912
タイトル	Cause of a Lower‐Tropospheric High‐Ozone Layer in Spring Over Hanoi
著者	Ogino, S.‐Y. ; Miyazaki, K. ; Fujiwara, M. ; Nodzu, M. I. ; Shiotani, M. ; Hasebe, F. ; Matsumoto, J. ; Witte, J. ; Thompson, A. M. ; Nguyen‐Thi, H. A. ; Nguyen, T. V.
著者名 Ogino, S.‐Y.
著者名 Miyazaki, K.
e-Rad_Researcher 00360941 著者名 Fujiwara, M.
著者名 Nodzu, M. I.
著者名 Shiotani, M.
著者名 Hasebe, F.
著者名 Matsumoto, J.
著者名 Witte, J.
著者名 Thompson, A. M.
著者名 Nguyen‐Thi, H. A.
著者名 Nguyen, T. V.
言語	英語
発行日	2022-04-29
収録物名	Journal of Geophysical Research: Atmospheres
巻(号)	127(10)
ページ	e2021JD035727
抄録	The ozonesonde observations in Hanoi, Vietnam, over 14 years since 2004, have confirmed an enhancement in lower tropospheric ozone concentration at about 3 km altitude in the spring season. We investigated the evolution of the ozone enhancement from analysis of meteorological data, backward trajectories, and model sensitivity experiments. In spring, air masses over Hanoi exhibit strong height dependence. At 3 km, the high-ozone air masses originate from the land area to the west of Hanoi, while low-ozone air masses below about 1.5 km are from the oceanic area to the east. Above 4 km, the air masses are mostly traced back to the farther west area. The chemical transport model simulations revealed that precursor emissions from biomass burning in the inland Indochina Peninsula have the largest contribution to the lower tropospheric ozone enhancement, which is transported upward and eastward and overhangs the clean air intrusion from the ocean to the east of Hanoi. At this height level, the polluted air has the horizontal extent of about 20° in longitude and latitude. The polluted air observed in Hanoi is transported further east and widely spread over the northern Pacific Ocean.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Copyright 2023 American Geophysical Union
PISSN	2169-897X
EISSN	2169-8996
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1029/2021JD035727