Remote sensing of cirrus clouds and aerosols by a sun photometer in Tunisia
| Autor: | H. Chtioui, F. B. Mansour, Pierre H. Flamant, S. Elouragini |
|---|---|
| Přispěvatelé: | Unité de recherche 'Energétique et Environnement' (03/UR 13-06), Institut Supérieur des Sciences Appliquées et de Technologie de Sousse, Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École des Ponts ParisTech (ENPC)-École polytechnique (X)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), EGU, Publication |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Mediterranean climate
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere 010504 meteorology & atmospheric sciences [SDU.OCEAN] Sciences of the Universe [physics]/Ocean Atmosphere media_common.quotation_subject 010502 geochemistry & geophysics Atmospheric sciences 01 natural sciences Aerosol Sun photometer Mediterranean sea 13. Climate action Sky Remote sensing (archaeology) Environmental science Cirrus Water vapor 0105 earth and related environmental sciences media_common Remote sensing |
| Zdroj: | Atmospheric Chemistry and Physics Discussions Atmospheric Chemistry and Physics Discussions, 2006, 6 (2), pp.3321-3335 Atmospheric Chemistry and Physics Discussions, European Geosciences Union, 2006, 6 (2), pp.3321-3335 |
| ISSN: | 1680-7367 1680-7375 |
| Popis: | Some ground based measurements of solar radiation by using a sun photometer, have been conducted in Tunisia during the period of November 2000–February 2002. Five key measurement sites were selected: Three Sites (Tunis, Sousse, Gabes) are located on the Mediterranean coast and Two sites (Gafsa, Tozeur) on the boarder of Sahara. Over a total of 149 measurement days, 21 days are identified as clear sky, 114 days as Cirrus clouds and 14 days as aerosols. Aerosols and Cirrus clouds Optical Thickness (AOT) are derived from photometric measurements at 532 nm wavelength. Spatial and temporal variabilities of AOT are presented and discussed in this paper. Cirrus clouds were frequently observed at Gafsa and Tozeur where saharan aerosol events are expected to be more frequent than cirrus clouds. The mediterranean sea and saharan aerosols are suspected to have the main role in cirrus clouds formation, by providing water vapor and high concentrations of cloud condensation and ice forming nuclei. |
| Databáze: | OpenAIRE |
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