Dual Lidar Observations at 10.6 μm and 532 nm for Retrieving Semitransparent Cirrus Cloud Properties
| العنوان: | Dual Lidar Observations at 10.6 μm and 532 nm for Retrieving Semitransparent Cirrus Cloud Properties |
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| المؤلفون: | Chiriaco, Marjolaine, Chepfer, H., Noel, Vincent, Haeffelin, M., Delaval, M., Drobinski, Philippe |
| المساهمون: | Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), 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), Service d'aéronomie (SA), 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 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) |
| المصدر: | Journal of Applied Meteorology and Climatology Journal of Applied Meteorology and Climatology, American Meteorological Society, 2006, 45, pp.537-555. ⟨10.1175/JAM2355.1⟩ Journal of Applied Meteorology and Climatology, 2006, 45, pp.537-555. ⟨10.1175/JAM2355.1⟩ |
| بيانات النشر: | American Meteorological Society, 2006. |
| سنة النشر: | 2006 |
| مصطلحات موضوعية: | [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Atmospheric Science, Ice cloud, 010504 meteorology & atmospheric sciences, Ice crystals, business.industry, Infrared, Attenuation, 01 natural sciences, 010309 optics, Crystal, Optics, Lidar, 0103 physical sciences, Environmental science, Cirrus, business, Absorption (electromagnetic radiation), Physics::Atmospheric and Oceanic Physics, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, Remote sensing |
| الوصف: | To improve the estimation of the infrared radiances in cirrus clouds, one needs to consider the vertical inhomogeneities of the cloud properties. The position of the maximum of absorption within an ice cloud is potentially important to the improvement of the split-window techniques for retrieving particle size and for understanding the radiative effect of the cloud in the infrared spectrum. Current remote sensing techniques used for inferring ice clouds hardly reach the level of accuracy required to resolve the vertical inhomogeneities of a cloud and to determine the position of absorption. This study explores the possibility of retrieving the vertical structures of ice clouds by combining data from two lidar measurements acquired at the wavelengths of 532 nm and 10.6 μm. A method is proposed to retrieve the variability of ice crystal absorption efficiency at 10.6 μm, the particle concentration weighted by the crystal area, and the attenuation by absorption at 10.6 μm. The method is tested against observations collected at Site Instrumental de Recherche en Télédétection Atmosphérique (SIRTA) in Palaiseau, France. Observations and simulations both show that lidar observations collected simultaneously at those two wavelengths can be used to determine the level within the ice cloud where maximum attenuation of infrared radiation occurs. The maximum attenuation may occur near the cloud base or the cloud top, depending on the case studied. |
| تدمد: | 1558-8432 1558-8424 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::611388042978e87d1caa9e8d25559f7f https://doi.org/10.1175/jam2355.1 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....611388042978e87d1caa9e8d25559f7f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15588432 15588424 |
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