Analysis of the SCIAMACHY limb spectra in the 585-595 nm wavelength range revealed detectable radiance emission signals in correspondence of the Na D1 and D2 lines for tangent altitudes above 75 km. A two lines differential algorithm has been developed to estimate the slant concentration of atomic Na from these measurements, and an onion peeling technique was adopted to convert the estimated slant profiles into vertical profiles. This technique allowed for the detection of Na sporadic layers. In addition, a Na vertical column densities retrieval scheme from 83÷85 km tangent altitudes has been developed. Results from both retrieval schemes were validated using University of Colorado and Instituto Nacional de Pesquisas Espaciais (INPE) Sodium Lidar data showing very good agreement. The 2002-2006 SCIAMACHY Level 1 products were analysed using the ESRIN GRID Processing On Demand (G-POD) infrastructures allowing for a global and long term analysis of the mesospheric Na layer.
|Publication status||Published - Jul 2007|
|Event||Envisat Symposium 2007 - , Switzerland|
Duration: 1 Jul 2007 → …
|Conference||Envisat Symposium 2007|
|Period||1/7/07 → …|
All Science Journal Classification (ASJC) codes
- Aerospace Engineering
Casadio, S., Retscher, C., Lang, R., Di Sarra, A., Clemesha, B., & Zehner, C. (2007). Retrieval of mesospheric sodium densities from SCIAMACHY daytime limb spectra. Paper presented at Envisat Symposium 2007, Switzerland.