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| Titel |
Reflectance spectroscopy of indoor settled dust in Tel Aviv, Israel: comparison between the spring and the summer seasons |
| VerfasserIn |
A. A. Chudnovsky, E. Ben-Dor, H. Saaroni |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: Mediterranean storms and extreme events in an era of climate change ; Nr. 12 (2007-07-04), S.51-57 |
| Datensatznummer |
250010358
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| Publikation (Nr.) |
 copernicus.org/adgeo-12-51-2007.pdf |
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| Zusammenfassung |
| The influence of mineral and anthropogenic dust components on the
VIS-NIR-SWIR spectral reflectance of artificial laboratory dust mixtures was
evaluated and used in combination with Partial Least Squares (PLS)
regression to construct a model that correlates the dust content with its
reflectance. Small amounts of dust (0.018–0.33 mg/cm2) were collected
using glass traps placed in different indoor environments in Tel Aviv,
Israel during the spring and summer of 2005. The constructed model was
applied to reflectance spectroscopy measurements derived from the field dust
samples to assess their mineral content. Additionally, field samples were
examined using Principal Component Analysis (PCA) to identify the most
representative spectral pattern for each season. Across the visible range of
spectra two main spectral shapes were observed, convex and concave, though
spectra exhibiting hybrid shapes were also seen. Spectra derived from spring
season dust samples were characterized mostly by a convex shape, which
indicates a high mineral content. In contrast, the spectra generated from
summer samples were characterized generally by a concave shape, which
indicates a high organic matter content. In addition to this seasonal
variation in spectral patterns, spectral differences were observed
associated with the dwelling position in the city. Samples collected in the
city center showed higher organic content, whereas samples taken from
locations at the city margins, near the sea and next to open areas,
exhibited higher mineral content. We conclude that mineral components
originating in the outdoor environment influence indoor dust loads, even
when considering relatively small amounts of indoor settled dust. The
sensitive spectral-based method developed here has potentially many
applications for environmental researchers and policy makers concerned with
dust pollution. |
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