 |
| Titel |
SCIAMACHY long-term measurements of NO in the mesosphere and lower thermosphere |
| VerfasserIn |
Stefan Bender, Miriam Sinnhuber, John Burrows, Martin Langowski |
| Konferenz |
EGU General Assembly 2015
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250102315
|
| Publikation (Nr.) |
 EGU/EGU2015-1624.pdf |
|
|
|
|
|
| Zusammenfassung |
| Solar, auroral, and radiation belt electrons and soft solar X-rays produce nitric monoxide
(NO) in the mesosphere and lower thermosphere (MLT, 50–150 km). Thus, the NO
content in this atmospheric region reveals how solar activity and variability impacts
the atmospheric composition. NO downward transport during polar winters then
influences the lower atmosphere, in particular by catalytically depleting ozone.
This in turn changes the heating and cooling rates and eventually the atmospheric
circulation.
We present ten years of SCIAMACHY measurements of NO in the MLT region. We
combine the special MLT data (50–150 km, one day every two weeks from 07/2008 until
04/2012) and the nominal data (0–90 km, daily from 08/2002 until 04/2012) to a
ten-year daily global NO density data set from 60 km to 90 km. From this data set, we
extract solar and geomagnetic forcing parameters using two different statistical
approaches. One method is the superposed epoch analysis and the other is multi-linear
regression. With the derived parameters, we aim to build a simple model of the NO
content in the mesosphere driven by solar and geomagnetic activity. Eventually,
this helps improving models of solar variability in climate and chemistry-climate
models. |
|
|
|
|
|
|