 |
| Titel |
Evaluation of spatio-temporal variability of Hamburg Aerosol Climatology against aerosol datasets from MODIS and CALIOP |
| VerfasserIn |
V. Pappas, N. Hatzianastassiou, C. Papadimas, C. Matsoukas, S. Kinne, I. Vardavas |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 16 ; Nr. 13, no. 16 (2013-08-22), S.8381-8399 |
| Datensatznummer |
250085647
|
| Publikation (Nr.) |
 copernicus.org/acp-13-8381-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| The new global aerosol climatology named HAC (Hamburg Aerosol Climatology) is
compared against MODIS (Collection 5, 2000–2007) and CALIOP (Level
2-version 3, 2006–2011) retrievals. The comparison of aerosol optical
depth (AOD) from HAC against MODIS shows larger HAC AOD values over regions
with higher aerosol loads and smaller HAC AOD values than MODIS for regions
with lower loads. The HAC data are found to be more reliable over land and
for low AOD values. The largest differences between HAC and MODIS occur from
March to August for the Northern Hemisphere and from September to February
for the Southern Hemisphere. In addition, both the spectral variability and
vertical distribution of the HAC AOD are examined at selected AERONET
(1998–2007) sites, representative of main aerosol types (pollutants, sea
salt, biomass and dust). Based on comparisons against spectral AOD values
from AERONET, the mean absolute percentage error in HAC AOD data is 25% at
ultraviolet wavelengths (400 nm), 6–12% at
visible and 18% at near-infrared (1000 nm). For the same AERONET sites, the HAC AOD vertical distribution
is compared against CALIOP space lidar data. On a daily average basis, HAD
AOD is less by 9% in the lowest 3 km than CALIOP values, especially for
sites with biomass burning smoke, desert dust and sea salt spray. Above the
boundary layer, the HAC AOD vertical distribution is reliable. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|