 |
| Titel |
A new method for ground based measurements of stratospheric winds by high-resolution infrared heterodyne spectroscopy |
| VerfasserIn |
Manuela Sornig, Sven Weiler, Dusan Stupar, Peter Kroetz, Guido Sonnabend |
| Konferenz |
EGU General Assembly 2010
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250045122
|
|
|
|
|
|
| Zusammenfassung |
| Infrared heterodyne spectroscopy offers the capability of very high spectral resolving power
(greater than 107) combined with high sensitivity. This high spectral resolution enables
unique high sensitivity studies of the physical and chemical processes in planetary
atmospheres through measurement of fully resolved lineshapes of transitions of molecular
species like CO2 or O3. The Cologne Tunable Heterodyne Infrared Spectrometer (THIS)
offers for the first time the possibility to study the whole mid-IR (7-14μm) by heterodyne
techniques. Dynamics in atmospheres of Mars and Venus have been already successfully
studied with THIS by observing molecular lines Doppler-shifted due to winds. An accuracy
of better than 10 m/s has been achieved. Results from such measurements with sufficiently
high spatial resolution are especially useful for validation of GCMs (General Circulation
Models) and an improved understanding of the current state and evolution of planetary
atmospheres.
Within a current project we adopted this technique to telluric absorption lines of ozone at
a wavelength of 9.17microns to determine wind velocities in the stratosphere of our planet.
Observations were accomplished from Cologne in January 2010 and wind velocities will be
presented at the conference. |
|
|
|
|
|