Two-dimensional mineral dust radiative effect calculations from CALIPSO observations over Europe
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hdl:2117/177197
Tipus de documentArticle
Data publicació2019-10-24
EditorEuropean Geosciences Union (EGU)
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
ProjecteACTRIS-2 - Aerosols, Clouds, and Trace gases Research InfraStructure (EC-H2020-654109)
EUNADICS-AV - European Natural Airborne Disaster Information and Coordination System for Aviation (EC-H2020-723986)
TELEDETECCION LIDAR ATMOSFERICA Y OBSERVACIONES COOPERATIVAS: EXPLOTACION, PROCESADO DE LA SEÑAL Y BALANCE RADIATIVO. (MINECO-TEC2015-63832-P)
EUNADICS-AV - European Natural Airborne Disaster Information and Coordination System for Aviation (EC-H2020-723986)
TELEDETECCION LIDAR ATMOSFERICA Y OBSERVACIONES COOPERATIVAS: EXPLOTACION, PROCESADO DE LA SEÑAL Y BALANCE RADIATIVO. (MINECO-TEC2015-63832-P)
Abstract
A demonstration study to examine the feasibility of retrieving dust radiative effects based on combined satellite data from MODIS (Moderate Resolution Imaging Spectroradiometer), CERES (Clouds and the Earth's Radiant Energy System) and CALIOP (Cloud-Aerosol Lidar with Orthogonal Polarization) lidar vertical profiles along their orbit is presented. The GAME (Global Atmospheric Model) radiative transfer model is used to estimate the shortwave and longwave dust radiative effects below the CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite) orbit assuming an aerosol parameterization based on the CALIOP vertical distribution at a horizontal resolution of 5¿km and additional AERONET (Aerosol Robotic Network) data. Two study cases are analyzed: a strong long-range transport mineral dust event (aerosol optical depth, AOD, of 0.52) that originated in the Sahara Desert and reached the United Kingdom and a weaker event (AOD¿=¿0.16) that affected eastern Europe. The radiative fluxes obtained are first validated in terms of radiative efficiency at a single point with space–time colocated lidar ground-based measurements from EARLINET (European Aerosol Research Lidar Network) stations below the orbit. The methodology is then applied to the full orbit. The strong dependence of the radiative effects on the aerosol load (and to a lesser extent on the surface albedo) highlights the need for accurate AOD measurements for radiative studies. The calculated dust radiative effects and heating rates below the orbits are in good agreement with previous studies of mineral dust, with the radiative efficiency obtained at the surface ranging between -80.3 and -63.0¿W¿m-2 for lower dust concentration event and -119.1 and -79.3¿W¿m-2 for the strong event. Thus, results demonstrate the validity of the method presented here to retrieve 2-D accurate radiative properties with large spatial and temporal coverage.
CitacióGranados, M. [et al.]. Two-dimensional mineral dust radiative effect calculations from CALIPSO observations over Europe. "Atmospheric chemistry and physics", 24 Octubre 2019, vol. 19, núm. 20, p. 13157-13173.
ISSN1680-7324
Versió de l'editorhttps://www.atmos-chem-phys.net/19/13157/2019/
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