 |
| Titel |
On the quality of MIPAS kinetic temperature in the middle atmosphere |
| VerfasserIn |
M. García-Comas, B. Funke, M. López-Puertas, D. Bermejo-Pantaleón, N. Glatthor, T. Clarmann, G. Stiller, U. Grabowski, C. D. Boone, W. J. R. French, T. Leblanc, M. J. López-González, M. J. Schwartz |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 12, no. 13 ; Nr. 12, no. 13 (2012-07-13), S.6009-6039 |
| Datensatznummer |
250011311
|
| Publikation (Nr.) |
 copernicus.org/acp-12-6009-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| The kinetic temperature and line of sight elevation information are retrieved
from the MIPAS Middle Atmosphere (MA), Upper Atmosphere (UA) and
NoctiLucent-Cloud (NLC) modes of high spectral resolution limb observations
of the CO2 15 μm emission using the dedicated IMK/IAA retrieval
algorithm, which considers non-local thermodynamic equilibrium conditions.
These variables are accurately derived from about 20 km (MA) and 40 km (UA
and NLC) to 105 km globally and both at daytime and nighttime. Typical
temperature random errors are smaller than 0.5 K below 50 km, 0.5–2 K at
50–70 km, and 2–7 K above. The systematic error is typically 1 K below
70 km, 1–3 K from 70 to 85 km and 3–11 K from 85 to 100 km. The
average vertical resolution is typically 4 km below 35 km, 3 km at
35–50 km, 4–6 km at 50–90 km, and 6–10 km above. We compared our
MIPAS temperature retrievals from 2005 to 2009 with co-located ground-based
measurements from the lidars located at the Table Mountain Facility and Mauna
Loa Observatory, the SATI spectrograph in Granada (Spain) and the Davis
station spectrometer, and satellite observations from ACE-FTS, Aura-MLS and
TIMED-SABER from 20 km to 100 km. We also compared MIPAS temperatures with
the high latitudes climatology from falling sphere measurements. The
comparisons show very good agreement, with differences smaller than 3 K
below 85–90 km in mid-latitudes. Differences over the poles in this
altitude range are larger but can be generally explained in terms of known
biases of the other instruments. The comparisons above 90 km worsen and
MIPAS retrieved temperatures are always larger than other instrument
measurements. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|