 |
| Titel |
Comparison of aerosol optical thickness with in situ visibility data over Cyprus |
| VerfasserIn |
A. Retalis, D. G. Hadjimitsis, S. Michaelides, F. Tymvios, N. Chrysoulakis, C. R. I. Clayton, K. Themistocleous |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1561-8633
|
| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 10, no. 3 ; Nr. 10, no. 3 (2010-03-05), S.421-428 |
| Datensatznummer |
250008000
|
| Publikation (Nr.) |
 copernicus.org/nhess-10-421-2010.pdf |
|
|
|
|
|
| Zusammenfassung |
| The monitoring of aerosol concentrations comprises a high environmental
priority, particularly in urban areas. Remote sensing of atmospheric aerosol
optical thickness (AOT) could be used to assess particulate matter levels at
the ground. However, such measurements often need further validation. In this
study, aerosol data retrieved from satellite and sun-photometer, on the one
hand, and visibility data at various locations in Cyprus, on the other hand,
for the period from January to June 2009 are contrasted. The results obtained
by the direct comparison between MODIS and handheld sun-photometer AOT data
exhibited a significant correlation (r=0.83); these results are in
agreement with those reported by the National Aeronautics and Space
Administration (NASA). The correlation between sun-photometer AOT and that
estimated from visibility measurements was also significant (r=0.76). A
direct and significant relationship between MODIS AOT and AOT estimated from
visibility values was also found for all the locations used (the correlation
coefficient was found to vary from 0.80 to 0.84). It is concluded that MODIS
AOT data provide accurate information on the aerosol content in Cyprus, while
in the absence of such data, visibility measurements could be used as a
secondary source of aerosol load information, in terms of aerosol optical
thickness, and provide useful information on a near-real time basis, whenever
data are available. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|