Aerosol Properties during the 2007 Global Dust Storm (MY28): Solar Infrared Occultation Observations by SPICAM
| Autor: | Betsis, D. S., Fedorova, Anna A., Korablev, Oleg, Bertaux, Jean-Loup, Montmessin, Franck |
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| Přispěvatelé: | Space Research Institute of the Russian Academy of Sciences (IKI), Russian Academy of Sciences [Moscow] (RAS), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Cardon, Catherine |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]
Astrophysics::Solar and Stellar Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics::Earth and Planetary Astrophysics [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph] Astrophysics::Galaxy Astrophysics Physics::Atmospheric and Oceanic Physics |
| Zdroj: | Sixth international workshop on the Mars atmosphere: Modelling and observations Sixth international workshop on the Mars atmosphere: Modelling and observations, Jan 2017, Grenade, Spain. Sixth international workshop on the Mars atmosphere: Modelling and observations, Jan 2017, Grenade, Spain |
| Popis: | International audience; The current analysis deals with properties of aer- osol particles during the 2007 global dust storm (Mars Year 28). Such events are very important for understanding and modeling processes of the Martian climate. During this time a significant dust lifting and transport processes are observed covering the whole planet by dust haze. Atmospheric heating associated with dust absorption of solar light increases strongly making a feedback and causing high advective velocities. These effects are forcing of atmospheric circulation.Solar occultation measurement in the IR spectral range allows to study the vertical distribution of aerosols. SPICAM on Mars-Express is a dedicated occultation experiment. It consists of ultraviolet and infrared spectrometers. Here we analyze data from the SPICAM IR (wavelengths of 1–1.7 μm) which provides information about optical properties of aerosols: opacity and extinction coefficient versus altitude.The ratio of opacities depends primarily on the particle size distribution. Based on Mie scattering theory we can reconstruct such characteristics as effective radius and variance assuming the lognor- mal distribution (Montmessin et al., 2002). Both mineral dust and water ice particles interact with the solar radiation so we have used refraction index for dust (Wolff et al., 2009) and H2O ice (Warren and Brandt, 2008). |
| Databáze: | OpenAIRE |
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