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@ARTICLE{li:825091,
author = {li, dan and Vogel, Bärbel and Bian, Jianchun and Müller,
Rolf and Pan, Laura L. and Günther, Gebhard and Bai,
Zhixuan and Li, Qian and Zhang, Jinqiang and Fan, Qiujun and
Vömel, Holger},
title = {{I}mpact of typhoons on the composition of the upper
troposphere within the {A}sian summer monsoon anticyclone:
the {SWOP} campaign in {L}hasa 2013},
journal = {Atmospheric chemistry and physics / Discussions},
volume = {},
issn = {1680-7375},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {FZJ-2016-07568},
pages = {},
year = {2016},
abstract = {In the frame of the SWOP (sounding water vapour, ozone, and
particle) campaign during the Asian summer monsoon (ASM),
ozone and water vapour profiles were measured by
balloon-borne sensors launched from Lhasa (29.66° N,
91.14° E, elevation 3650 m), China, in August 2013. In
total, 24 soundings were launched, nearly half of which show
some strong variations in the relationship between ozone and
water vapour in the tracer-tracer correlation in the upper
troposphere and lower stratosphere (UTLS). 20-day backward
trajectories of each sounding were calculated using the
trajectory module of the Chemical Lagrangian Model of the
Stratosphere (CLaMS) to analyse these variations. The
trajectory calculations demonstrate that three tropical
cyclones (tropical storm Jebi, typhoons Utor and Trami),
which occurred over the Western Pacific Ocean during August
2013, had a considerable impact on the vertical distribution
of ozone and water vapour by uplifting marine air masses to
altitudes of the ASM anticyclone. Air parcels subsequently
arrived at the observation site via two primary pathways:
firstly via direct horizontal transport from the location of
the typhoon to the station within approximately three days,
and secondly via rotational subsidence, during which air
parcels descend slowly along a circle following the
anticyclone flow within a timescale of one week.
Furthermore, the interplay between the spatial position of
the ASM anticyclone and tropical cyclones plays a key role
in controlling the transport pathways of air parcels from
the boundary layer of the Western Pacific to Lhasa in
horizontal as well as vertical transport. Moreover, the
statistical analysis shows that the strongest impact by
typhoons is found at altitudes between 14.5 km and 17 km
(365–375 K). Low ozone values (50–80 ppbv) were
observed between 370 K and 380 K due to the strong
vertical transport within tropical cyclones.},
cin = {IEK-7},
ddc = {550},
cid = {I:(DE-Juel1)IEK-7-20101013},
pnm = {244 - Composition and dynamics of the upper troposphere and
middle atmosphere (POF3-244)},
pid = {G:(DE-HGF)POF3-244},
typ = {PUB:(DE-HGF)16},
doi = {10.5194/acp-2016-875},
url = {https://juser.fz-juelich.de/record/825091},
}