aktualisiertes pdf - DPG-Tagungen

Fachvortrag UP 3.5 Mo 17:30 HS 118
NO2-Columns measured by the AMAXDOAS instrument over
Europe in 2003 — •Klaus-Peter Heue 1 , Marco Bruns 2 , John
P. Burrows 2 , Wei-Der Lee 1 , Ulrich Platt 1 , Irene Pundt 1 , Andreas
Richter 2 , Thomas Wagner 1 , and Ping Wang 2 — 1 Institut
für Umweltphysik, Universität Heidelberg, INF 229, D-69120 Heidelberg
— 2 Institut für Umweltphysik, Universität Bremen, Otto-Hahn-Allee 1,
D-28359 Bremen
The Air borne Multi AXis DOAS (AMAXDOAS) was successfully operated
during two campaigns in winter and summer 2003. During winter
it was run aboard the DLR Falcon (2nd airborne campaign for SCIA-
MACHY validation). The aircraft flew to the Arctic and to the Tropics
at about 10 km flight altitude with a total flight track of 6400 km over
Europe. In addition the OLEX (Lidar) and the ASUR (Microwave) instruments
were operated onboard this aeroplane.
During summer (EU-FORMAT II campaign), the AMAXDOAS was
mounted on a small Partenavia 68, which is perfectly suited for flying
slowly just above the boundary layer. Here, nine flight tracks (4000 km)
were flown in the Po-Valley, in particular around Milano.
With different viewing angles, looking above and below the aircrafts,
AMAXDOAS provides profile information of many trace gases e.g.: NO2,
BrO, H2O, HCHO, O3, OClO, SO2.
Here results of both campaigns will be presented.
Fachvortrag UP 3.6 Mo 17:45 HS 118
Disjunct Eddy Covariant flux measurements with PTR-
MS during BEWA 2002 — •Wolfgang Grabmer 1 , Martin
Graus 1 , Christian Lindinger 1 , Armin Wisthaler 1 , Armin
Hansel 1 , Bernhard Rappenglueck 2 , Dominik Steigner 2 ,
Roos Zuurbier 2 , and Rainer Steinbrecher 2 — 1 Institut fuer
Ionenphysik, Universitaet Innsbruck — 2 Institut fuer Meteorologie und
Klimaforschung, Atmosphaerische Umweltforschung, FZ Karlsruhe,
Garmisch-Partenkirchen
A disjunct eddy covariance (DEC) measurement system, which determines
the fluxes of biogenic volatile organic compounds (BVOCs) out
of vegetation, has been tested in the field. In disjunct sampling, short
separate samples are taken instead of continuously sampling the air as in
traditional relaxed eddy accumulation (REA) and true eddy covariance
systems. This method reduces the number of samples but allows more
time to analyse them in order to gain higher measurement precision and
accuracy. The disjunct eddy covariance system combined with PTR-MS
analysis (proton transfer reaction mass spectrometry) was successfully
deployed to measure monoterpene fluxes during the BEWA field campaign
2002 at the Waldstein tower in the Bavarian Fichtelgebirge. The
ability of the system to measure monoterpene fluxes above a Norway
Spruce (Picea abies) forest was demonstrated by comparing successfully
flux results obtained with the REA and enclosure approach at the same
location.
Fachvortrag UP 3.7 Mo 18:00 HS 118
Lidar systems for 4-dimensional observations of atmospheric
key parameters in development at University of Hohenheim —
•Andreas Behrendt, Anna Petrova, Thorsten Schaberl, Max
Shiler, Gerd Wagner, and Volker Wulfmeyer — Institut fuer
Physik und Meteorologie, Universitaet Hohenheim
The lidar activities at University of Hohenheim are based on a new
Nd:YAG laser which emits a nearly Gaussian-shaped beam (M 2 ¡ 1.5) of
100 W at 1064 nm with a repetition rate of 250 Hz. Frequency-doubling
yields 50 W output power at 532 nm. We employ the 532-nm radiation for
UP 4 Satelliten und Anwendungen I
pumping a Ti:sapphire ring-resonator which will be used for water vapor
measurements with the differential absorption lidar (DIAL) technique.
In a second branch a Cr4+:YAG crystal is pumped with the 1064-nm
radiation. Its eye-safe output of 1400 to 1500 nm will be used for monitoring
aerosols and clouds; in a second step, we will explore the feasibility
of water vapor DIAL measurements at 1480 nm. The 532 and 1064
nm radiation is also used for lidar observations and, in the near future,
frequency tripling will yield 355-nm radiation for simultaneous measurements
of temperature, particle extinction, and particle backscattering
with the rotational Raman technique. The high power of this combined
transmitter and effective use of the received signals will allow scanning
operation. As a result, it will be possible to observe the spatial structure
of a highly interesting set of atmospheric key parameters with unprecedented
spatial and temporal resolution.
Fachvortrag UP 3.8 Mo 18:15 HS 118
Carbon Monoxide Variability in the Northern and Southern
Hemisphere Measured by High-Resolution Solar Absorption
Spectroscopy — •Voltaire Velazco 1 , Justus Notholt 1 ,
Thorsten Warneke 1 , Astrid Schultz 2 , and Otto Schrems 3 —
1 Univesity of Bremen, Otto Hahn Allee 1, 28359 Bremen, Germany —
2 Alfred Wegener Institute for Polar and Marine Research, Telegrafenberg
A43 D14473 Potsdam, Germany — 3 Alfred Wegener Institute for Polar
and Marine Research, Am Handelshafen 12, Bremerhaven, Germany
Vertical profiles of atmospheric Carbon Monoxide (CO) have been retrieved
from solar absorption FT-IR spectra measured at the NDSC station
in Ny-Alesund, Spitsbergen (79N, 12E) and on board the German
research vessel Polarstern. Results are presented from seven years of FT-
IR measurements in Spitsbergen and from 5 different ship cruises in the
Atlantic between 50N and 40S. CO enhancements due to biomass burning
have been detected in the equatorial regions as well as in the Arctic.
Other trace gases related to biomass burning have also been studied. The
characterization of the profiles has been established by an information
content analysis and an estimation of the error budgets.
Fachvortrag UP 3.9 Mo 18:30 HS 118
Dekadische Ozonänderungen über der Nordatlantik-
Europaregion — •Peters Dieter, Günter Entzian, and
Gerhard Schmitz — Leibniz-Institut für Atmosphärenphysik,
Kühlungsborn, Mecklenburg
In this study we extend our ozone investigation from the 1980s to the
period from 1959 up to 2001. The results represent a first approximation
of the decadal change of longitude-dependent ozone distribution which
is unknown for the decades before the FGGE experiment was started
in 1978-79. This was possible because the NCEP re-analyses data set
(Kalnay et al., 1996, upgrades) cover this period. With the help of a linear
transport model for large-scale waves of ozone (Peters et al., 1996) we
were able to calculate the decadal ozone changes for all 4 decades. The
zonal mean ozone distribution was fixed to January 1979 after McPeters
et al. (1989) to study only the result of wave structure changes. We estimated
a 3-dimensional distribution of ozone change up to 10hPa (about
30km) but here we focus only on total ozone changes.
Zeit: Montag 14:15–16:00 Raum: HS 225
Fachvortrag UP 4.1 Mo 14:15 HS 225
Abschätzung anthropogener NOx–Emissionen mit Hilfe von Satellitendaten
— •Nicola Toenges-Schuller, Olaf Stein und
Franz Rohrer — ICG-II, Forschungszentrum Jülich, 52425 Jülich
Stickoxide (NOx) spielen eine wichtige Rolle in der Chemie der
Atmosphäre. Ihre globale Verteilung wird mit Hilfe von Chemie–
Transport–Modellen untersucht, die auf sogenannte Emissionskataster
zurückgreifen. Weit verbreitet ist die EDGAR–Datenbank, deren
Abschätzung für anthropogene Quellen auf Wirtschaftsdaten der
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einzelnen Länder basiert.
Wir schätzen mit Hilfe von Satellitendaten unabhängig von EDGAR
verschiedene NOx–Quellen hinsichtlich ihres relativen Beitrags und ihrer
geographischen Verteilung ab und vergleichen sie mit Messungen
troposphärischer NO2–Säulendichten des GOME-Satelliteninstruments
(Leue et al., IUP Heidelberg, Richter et al., IUP Bremen). Als Proxy für
die anthropogenen Emissionen dienen uns kalibrierte Satellitenaufnahmen
der Lichter der Welt bei Nacht (C. Elvidge, OLS, DMSP).
Die aus den Lichtern gewonnene NOx–Quellverteilung korreliert
räumlich mit den GOME–Säulendichten ebensogut wie die der EDGAR–