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| Titel |
The construction of a 3D aerosol climatology from CALIOP for the improvement of tropospheric trace gas retrievals from satellites |
| VerfasserIn |
Franziska Kreling, Marloes Penning de Vries, Steffen Beirle, Thomas Wagner |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250080706
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| Zusammenfassung |
| For the correct interpretation of satellite measurements of trace gases, the airmass factor (or
weighting function) of a measurement needs to be well known. This airmass factor depends
on solar and viewing geometry, but is also strongly influenced by clouds and aerosols —
particularly in the troposphere. Differences in assumptions of aerosol amount, profile and
type lead to large errors in trace gas retrievals: for example, the vertical column density
of NO2 over China can vary by a factor of 2 depending on the choice of aerosol
parameters. The recent release of a global monthly mean aerosol profile product by the
CALIOP lidar team presents an opportunity to improve the airmass factor calculations
by including measured extinction profiles (as opposed to model data) on a 2°x5°
spatial resolution, with a time resolution of seasons or even months. The profiles
can be combined with MODIS monthly mean aerosol optical depth, which is an
extensively validated product with much better statistics compared to the CALIOP
product.
We here present first attempts at the construction of such a 3D aerosol climatology.
Investigations of the quality of the data set and the variability of the profiles in space and time
are shown. |
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