Dataset Edition

Présentation générale
Nom du jeu de donnéesATR Aerosol Diffusion
Créé le2017-05-02
Projet(s)DACCIWA > WP5 - Radiative Processes
Date de début (yyyy-mm-dd)2016-06-29Date de fin (yyyy-mm-dd)2016-07-16
Contact(s)

Accès aux données Dataset as provided by the Principal Investigator
History

ISSUE2017-05-16

Description du jeu de données
RésuméAerosol integrating nephelometer, provide aerosol diffusion coefficient at 3 wavelengths (450, 525 and 635 nm)
Strategie d'observationInstrument connected to the Community Aerosol Inlet in the ATR42
RéférencesMuller et al., Design and performance of a three-wavelength LED-based total scatter and backscatter integrating nephelometer, Atmos. Meas. Tech., 4, 1291–1303, 2011
Description de l'instrument
Type d'instrumentEarth Remote Sensing Instruments > Passive Remote Sensing > Photon/Optical Detectors > NEPHELOMETERS
ModèleAurora 3000
Instrument features / CalibrationInstrument that directly measures a value close to the light scattering coefficient of airborne particles. Calibrated using CO2.
Observation frequency1 Hz
Information géographique
Site 1
Mot-clé de localistionCONTINENT > AFRICA > WESTERN AFRICA
SiteAircraft
Type de plateformeAIRCRAFT > ATR-42
Longitude minimale (°)-4Longitude maximale (°)4
Latitude maximale (°)10Latitude minimale (°)3
Altitude min60Altitude max7000
Paramètres mesurés
Paramètre mesuré 1
Nom du paramètreAerosol Total Scatter
Mot-clé du paramètreAtmosphere > Aerosols
Unitéper megameter Mm-1
Méthodologie d'acquisition et qualitéData Averaged every 10 seconds. In-cloud Data removed. Correction made using Anderson and Ogren (1998, herafter AO98) correction scheme. and correction factors obtained by Muller et al. (2011) without a submicron size cut. Bond et al. (2009) pointed out that the AO98 correction is accurate for a wide range of atmospheric aerosols. If the single scattering albedo is larger than 0.8 and the aerosol absorption does not have a large spectral dependence, the uncertainty of the correction is not expected to be larger than 2 %. For a large spectral dependence of the absorption, the uncertainty can be up to 3 % at a single scattering albedo of 0.8 and larger for smaller single scattering albedos. Massoli et al. (2009) reported high uncertainties (max 25% with albedo of 0.4) of the AO98 correction for highly absorbing particles caused by the high real part of refractive indices of absorbing particles. For better accuracy, a detailed optical closure needs to be done. Data output are filtered using a Kalman Filter. The Kalman filter provides the best possible compromise between response time and noise reduction for the type of signal and noise present in the ambient air.
Date de début (yyyy-mm-dd)2016-06-29Date de fin (yyyy-mm-dd)2016-07-16
Précision du capteur / Incertitude
Paramètre mesuré 2
Nom du paramètreAerosol Backscatter
Mot-clé du paramètreAtmosphere > Aerosols > Aerosol Backscatter
Unitéper megameter Mm-1
Méthodologie d'acquisition et qualitéData Averaged every 10 seconds. In-cloud Data removed. Correction made using Muller et al. (2011) without a submicron size cut. For better accuracy, a detailed optical closure needs to be done. Data output are filtered using a Kalman Filter. The Kalman filter provides the best possible compromise between response time and noise reduction for the type of signal and noise present in the ambient air.
Date de début (yyyy-mm-dd)2016-06-29Date de fin (yyyy-mm-dd)2016-07-16
Précision du capteur / Incertitude
Information sur l'utilisation des données
Conditions d'utilisation des donnéesThe research leading to these results has received funding from the European Union 7th Framework Programme (FP7/2007-2013) under Grant Agreement no. 603502 (EU project DACCIWA: Dynamics-aerosol-chemistry-cloud interactions in West Africa).
Charte d'accès aux donnéesCreative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License
Base de donnéesDacciwa database
Format des fichiers de donnéesNASA Ames 1001