 |
| Titel |
One year of CNR-IMAA multi-wavelength Raman lidar measurements in coincidence with CALIPSO overpasses: Level 1 products comparison |
| VerfasserIn |
L. Mona, G. Pappalardo, A. Amodeo, G. D'Amico, F. Madonna, A. Boselli, A. Giunta, F. Russo, V. Cuomo |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 9, no. 18 ; Nr. 9, no. 18 (2009-09-29), S.7213-7228 |
| Datensatznummer |
250007656
|
| Publikation (Nr.) |
 copernicus.org/acp-9-7213-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| At CNR-IMAA, an aerosol lidar system has operated since May 2000 in the
framework of EARLINET (European Aerosol Research Lidar Network), the first
lidar network for tropospheric aerosol study on a continental scale. High
quality multi-wavelength measurements make this system a reference point for
the validation of data products provided by CALIPSO (Cloud-Aerosol Lidar and
Infrared Pathfinder Satellite Observations), the first satellite-borne lidar
specifically designed for aerosol and cloud study. Since 14 June 2006,
dedicated measurements have been performed at CNR-IMAA in coincidence with
CALIPSO overpasses. For the first time, results on 1-year comparisons
between ground-based multi-wavelength Raman lidar measurements and
corresponding CALIPSO lidar Level 1 profiles are presented. A methodology
for the comparison is presented and discussed in detail. Night-time cases
are considered to take advantage from Raman capability of the ground based
lidar. Cases with the detection of cirrus clouds in CALIPSO data are
separately analysed for taking into account multiple scattering effects. For
cirrus cloud cases, few cases are available to draw any conclusions. For
clear sky conditions, the comparison shows good performances of the CALIPSO
on-board lidar: the mean relative difference between the ground-based and
CALIPSO Level 1 measurements is always within its standard deviation at all
altitudes, with a mean difference in the 3–8 km altitude range of
(−2±12)%. At altitude ranges corresponding to the typical PBL height observed
at CNR-IMAA, a mean difference of (−24±20)% is observed in CALIPSO
data, probably due to the difference in the aerosol content at the location
of PEARL and CALIPSO ground-track location. Finally, the mean differences
are on average lower at all altitude ranges for the closest overpasses (at
about 40 km) respect to the 80-km overpasses. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|