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| Titel |
Atmospheric research at the Bialystok super site |
| VerfasserIn |
Jošt V. Lavrič, Gionata Biavati, Huilin Chen, Dietrich G. Feist, Christoph Gerbig, Krzysztof Katrynski, Janina Messerschmidt, Justus Notholt, Mathias Palm, Maria-Elena Popa, Thorsten Warneke, Martin Heimann |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250036148
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| Zusammenfassung |
| Atmospheric research around the 300 meters tall Bialystok tower, Poland (53.23N, 23.03E;
183m a.s.l.) has started in 2003 with regular aircraft profiling. In situ measurements of
temperature, relative humidity, ambient pressure and CO2 mixing are obtained, as well as
mixing ratios of CO2, CH4, CO, H2, N2O and SF6 from laboratory analysis of
flasks that are sampled at altitudes of 100, 300, 500, 1000, 1500, 2000, and 2500
metres above ground level. Since August 2008, in situ CO2measurements have been
upgraded, from which better agreements have been achieved between in situ CO2 and
the flasks. During each flight, two profiles are taken with a spatial separation of
20 kilometres. Analysis of the corresponding spatial variability of the columns is
presented.
A low maintenance system for semi-continuous measurement of CO2, O2/N2, CH4, CO,
N2O and SF6 from five tower levels (up to 300 m) and the associated flask programme (CO2,
O2/N2, CH4, CO, N2O, SF6, Ar/N2, H2 and 13C and 18O isotopes in CO2) were added in
July 2005. Near real-time CO2 data are provided in the frame of the IMECC project.
The time series of the in situ measurements and their variability patterns will be
presented.
In October 2007, the station was equipped with a ceilometer that works like a small
LIDAR system and has been designed to detect cloud base height. The data provides cloud
statistics for the station which is important for sun-dependent measurements (e.g. FTIR). A
long term goal is to also retrieve information on the planetary boundary layer from analysis of
the backscatter signals.
In the frame of two EU projects (Geomon, IMECC), an automated FTIR system
was set up and is operational since March 2009, which qualifies Bialystok also as
a TCCON site. FTIR measurements, calibrated against the global in situ surface
network, permit to link satellite CO2 observations (e.g. the GOSAT programme) to
the global surface network. First time series of FTIR CO2 and CH4 data will be
presented.
Footprint analysis using the STILT model shows that the measurements made
at the 300 m level are regionally representative, with dominant wind directions
advecting air travelled across central Europe to the station. The much larger footprints
for the total column measurements of the FTIR were calculated using the TM3
model.
The current equipment set makes Bialystok one of the most important sites for
greenhouse gas in situ measurements in Europe. It is also one of only four sites worldwide
where co-located FTIR solar absorption (total column measurement) and vertically resolved
measurements on tall towers are performed. |
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