Publication Date:
2017-04-04
Description:
A multiple scattering inversion procedure for the aerosol extinction coefficient profile retrieval and error assessment in the oxygen A-band, for passive remote sensing instruments, has been developed. The
procedure has been applied to SCIAMACHY nadir simulated measurements to investigate its effectiveness in the troposphere.
The inversion procedure consists of a multiple scattering Forward Model, an inversion method and a complete sensitivity and error assessment tool. The Forward Model is based on LIDORT code; the inversion method, the sensitivity study and the complete error assessment are based on Optimal Estimation. The sensitivity and error analysis has been derived to investigate the profile retrieval errors due to the uncertainty of different aerosol optical properties, molecular and surface parameters.
The analysis confirms that the profile retrieval accuracy and vertical resolution are strongly dependent on the oxygen A-band spectral resolution. The moderately high SCIAMACHY spectral resolution (0.4 nm in
the oxygen A-band) results in distinguishing a maximum of three aerosol layers in troposphere. The SCIAMACHY tropospheric aerosol profile retrieval is shown to be highly sensitive to aerosol optical
properties as phase function and single scattering albedo. The sensitivity study reveals an improvement of information content increasing the solar zenith angle and decreasing the surface albedo. As regards the
forward model, negligible errors occur as the number of streams exceeds 6.
Description:
Published
Description:
354-380
Description:
1.10. TTC - Telerilevamento
Description:
JCR Journal
Description:
reserved
Keywords:
Aerosol profile retrieval
;
Error assessment
;
Inversion methods
;
Forward model in multiple scattering Forward model in multiple scattering atmosphere
;
SCIAMACHY nadir measurements
;
01. Atmosphere::01.01. Atmosphere::01.01.08. Instruments and techniques
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
