 |
| Titel |
Aerosol radiative effects in the ultraviolet, visible, and near-infrared spectral ranges using long-term aerosol data series over the Iberian Peninsula |
| VerfasserIn |
D. Mateos, M. Antón, C. Toledano, V. E. Cachorro, L. Alados-Arboledas, M. Sorribas, M. J. Costa, J. M. Baldasano |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 24 ; Nr. 14, no. 24 (2014-12-19), S.13497-13514 |
| Datensatznummer |
250119251
|
| Publikation (Nr.) |
 copernicus.org/acp-14-13497-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| A better understanding of aerosol radiative properties is a crucial
challenge for climate change studies. This study aims at providing a
complete characterization of aerosol radiative effects in different spectral
ranges within the shortwave (SW) solar spectrum. For this purpose, long-term
data sets of aerosol properties from six AERONET stations located in the
Iberian Peninsula (southwestern Europe) have been analyzed in terms of
climatological characterization and inter-annual changes. Aerosol
information was used as input for the libRadtran model in order to determine
the aerosol radiative effect (ARE) at the surface in the ultraviolet
(AREUV), visible (AREVIS), near-infrared (ARENIR), and the
entire SW range (ARESW) under cloud-free conditions. Over the whole
Iberian Peninsula, yearly aerosol radiative effects in the different
spectral ranges were found to be −1.1 < AREUV < −0.7,
−5.7 < AREVIS < −3.5,
−2.6 < ARENIR < −1.6, and −8.8 < ARESW < −5.7 (in W m−2).
Monthly means of ARE showed a seasonal pattern with larger values
in spring and summer. The aerosol forcing efficiency (AFE), ARE per unit of
aerosol optical depth, has also been evaluated in the four spectral ranges.
AFE exhibited a dependence on single scattering albedo as well as a
weaker one on the Ångström exponent. AFE is larger (in absolute
value) for small and absorbing particles. The contributions of the UV, VIS,
and NIR ranges to the SW efficiency varied with the aerosol types. The
predominant aerosol size determined the fractions AFEVIS/AFESW and
AFENIR/AFESW. The AFEVIS was the dominant contributor for all
aerosol types, although non-absorbing large particles caused more even
contribution of VIS and NIR intervals. The AFEUV / AFESW ratio
showed a higher value in the case of absorbing fine particles. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|