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@ARTICLE{Sheel:155380,
author = {Sheel, Varun and Sahu, L. K. and Kajino, M. and Deushi, M.
and Stein, O. and Nedelec, P.},
title = {{S}easonal and interannual variability of carbon monoxide
based on {MOZAIC} observations, {MACC} reanalysis, and model
simulations over an urban site in {I}ndia},
journal = {Journal of geophysical research / Atmospheres},
volume = {119},
number = {14},
issn = {0148-0227},
address = {Washington, DC},
publisher = {Union},
reportid = {FZJ-2014-04549},
pages = {9123 - 9141},
year = {2014},
abstract = {The spatial and temporal variations of carbon monoxide (CO)
are analyzed over a tropical urban site, Hyderabad
(17°27′N, 78°28′E) in central India. We have used
vertical profiles from the Measurement of ozone and water
vapor by Airbus in-service aircraft (MOZAIC) aircraft
observations, Monitoring Atmospheric Composition and Climate
(MACC) reanalysis, and two chemical transport model
simulations (Model for Ozone And Related Tracers (MOZART)
and MRI global Chemistry Climate Model (MRI-CCM2)) for the
years 2006–2008. In the lower troposphere, the CO mixing
ratio showed strong seasonality, with higher levels (>300
ppbv) during the winter and premonsoon seasons associated
with a stable anticyclonic circulation, while lower CO
values (up to 100 ppbv) were observed in the monsoon season.
In the planetary boundary layer (PBL), the seasonal
distribution of CO shows the impact of both local
meteorology and emissions. While the PBL CO is predominantly
influenced by strong winds, bringing regional background air
from marine and biomass burning regions, under calm
conditions CO levels are elevated by local emissions. On the
other hand, in the free troposphere, seasonal variation
reflects the impact of long-range transport associated with
the Intertropical Convergence Zone and biomass burning. The
interannual variations were mainly due to transition from El
Niño to La Niña conditions. The overall modified
normalized mean biases (normalization based on the observed
and model mean values) with respect to the observed CO
profiles were lower for the MACC reanalysis than the MOZART
and MRI-CCM2 models. The CO in the PBL region was
consistently underestimated by MACC reanalysis during all
the seasons, while MOZART and MRI-CCM2 show both positive
and negative biases depending on the season.},
cin = {IEK-8 / JSC},
ddc = {550},
cid = {I:(DE-Juel1)IEK-8-20101013 / I:(DE-Juel1)JSC-20090406},
pnm = {233 - Trace gas and aerosol processes in the troposphere
(POF2-233) / MACC II - Monitoring Atmospheric Composition
and Climate Interim Implementation (283576)},
pid = {G:(DE-HGF)POF2-233 / G:(EU-Grant)283576},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000340402800035},
doi = {10.1002/2013JD021425},
url = {https://juser.fz-juelich.de/record/155380},
}