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@ARTICLE{Roux:866845,
author = {Roux, F. and Clark, H. and Wang, K. Y. and Rohs, Susanne
and Sauvage, B. and Nedelec, P.},
title = {{I}nfluence of typhoons on atmospheric composition deduced
from {IAGOS} measurements over {T}aipei},
journal = {Atmospheric chemistry and physics},
volume = {20},
number = {6},
issn = {1680-7316},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {FZJ-2019-05908},
pages = {3945 - 3963},
year = {2019},
abstract = {The research infrastructure IAGOS (In-Service Aircraft for
a Global Observing System) equips commercial aircraft with
instruments to monitor the composition of the atmosphere
during flights around the world. In this article, we use
data from two China Airlines aircraft based in Taipei
(Taiwan) which provided daily measurements of ozone, carbon
monoxide and water vapour throughout the summer of 2016. We
present time series, from the surface to the upper
troposphere, of ozone, carbon monoxide and relative humidity
near Taipei, focusing on periods influenced by the passage
of typhoons. We examine landing and take-off profiles in the
vicinity of tropical cyclones using ERA-5 reanalyses to
elucidate the origin of the anomalies in the vertical
distribution of these chemical species.Results indicate a
high ozone content in the upper- to middle-troposphere track
of the storms. The high ozone mixing ratios are generally
correlated with potential vorticity and anti-correlated with
relative humidity, suggesting stratospheric origin. These
results suggest that tropical cyclones participate in
transporting air from the stratosphere to troposphere and
that such transport could be a regular feature of typhoons.
After the typhoons passed Taiwan, the tropospheric column
was filled with substantially lower ozone mixing ratios due
to the rapid uplift of marine boundary layer air. At the
same time, the relative humidity increased, and carbon
monoxide mixing ratios fell. Locally, therefore, the passage
of typhoons has a positive effect on air quality at the
surface, cleansing the atmosphere and reducing the mixing
ratios of pollutants such as CO and O3.},
cin = {IEK-8},
ddc = {550},
cid = {I:(DE-Juel1)IEK-8-20101013},
pnm = {243 - Tropospheric trace substances and their
transformation processes (POF3-243)},
pid = {G:(DE-HGF)POF3-243},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000522877200001},
doi = {10.5194/acp-20-3945-2020},
url = {https://juser.fz-juelich.de/record/866845},
}