Research
Navigate
MAX-DOAS measurements in Summit
Introduction Instrument Data References Links Contact
Introduction:
A
MAXDOAS instrument has been operated at the Summit research station (72° N,
38° W) in the interior of Greenland from July 2003 to September 2005. This station
is located at a very special high altitude (3200 m) Arctic site characterized by
low temperatures, very low water vapour column and a clean troposphere.
The focus of the measurements is stratospheric chemistry, although some interesting tropospheric chemistry is also taking place on and within the snow. With its year round snow and ice cover, Greenland is also a very interesting site for satellite validation and the study of albedo effects on the data retrieval.
Instrument:
The
DOAS instrument in Summit was located inside a measurement container shared with the
RAMAS microwave
instrument which is also operated by the IUP Bremen. It consists of a
temperature stabilized grating spectrometer equipped with a cooled CCD detector
and spectrometer shutter. The instrument is connected to a heated telescope
which is located on top of the container with a quartz fibre bundle and a number
of electrical and control connections. The telescope has two viewing ports: One
in zenith direction, the other one towards the horizon (off-axis). In the
off-axis direction, up to 4 angles can be observed sequentially in the range of
0° to 30° elevation by means of a motorized mirror. Both line-lamp and white
light calibration lamps are integrated in the telescope box and are used for
daily calibration measurements. More on the instrument and measurement principle
can be found on our MAXDOAS page.
Data:
If you have any requests, please contact Thomas Medeke.
References:
- SCIAMACHY validation with ground-based DOAS observations final report (in German)
Links:
- The installation of the DOAS instrument at Summit is a co-operation with the RAMAS project of the Microwave group at the IUP Bremen.
- More on Summit can be found on the GeoSummit site.
- The instrument in Summit was mainly used for the validation of SCIAMACHY.
Contact:
If you are interested in more information or would like to have access to our data, please contact Thomas Medeke.