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© 2018. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

This study focuses on the analysis of aerosol hygroscopic growth during the Sierra Nevada Lidar AerOsol Profiling Experiment (SLOPE I) campaign by using the synergy of active and passive remote sensors at the ACTRIS Granada station and in situ instrumentation at a mountain station (Sierra Nevada, SNS). To this end, a methodology based on simultaneous measurements of aerosol profiles from an EARLINET multi-wavelength Raman lidar (RL) and relative humidity (RH) profiles obtained from a multi-instrumental approach is used. This approach is based on the combination of calibrated water vapor mixing ratio (r) profiles from RL and continuous temperature profiles from a microwave radiometer (MWR) for obtaining RH profiles with a reasonable vertical and temporal resolution. This methodology is validated against the traditional one that uses RH from co-located radiosounding (RS) measurements, obtaining differences in the hygroscopic growth parameter (γ) lower than 5 % between the methodology based on RS and the one presented here. Additionally, during the SLOPE I campaign the remote sensing methodology used for aerosol hygroscopic growth studies has been checked against Mie calculations of aerosol hygroscopic growth using in situ measurements of particle number size distribution and submicron chemical composition measured at SNS. The hygroscopic case observed during SLOPE I showed an increase in the particle backscatter coefficient at 355 and 532 nm with relative humidity (RH ranged between 78 and 98 %), but also a decrease in the backscatter-related Ångström exponent (AE) and particle linear depolarization ratio (PLDR), indicating that the particles became larger and more spherical due to hygroscopic processes. Vertical and horizontal wind analysis is performed by means of a co-located Doppler lidar system, in order to evaluate the horizontal and vertical dynamics of the air masses. Finally, the Hänel parameterization is applied to experimental data for both stations, and we found good agreement on γ measured with remote sensing (γ532=0.48±0.01 and γ355=0.40±0.01) with respect to the values calculated using Mie theory (γ532=0.53±0.02 and γ355=0.45±0.02), with relative differences between measurements and simulations lower than 9 % at 532 nm and 11 % at 355 nm.

Details

Title
Hygroscopic growth study in the framework of EARLINET during the SLOPE I campaign: synergy of remote sensing and in situ instrumentation
Author
Andrés Esteban Bedoya-Velásquez 1 ; Navas-Guzmán, Francisco 2   VIAFID ORCID Logo  ; Granados-Muñoz, María José 3   VIAFID ORCID Logo  ; Titos, Gloria 4   VIAFID ORCID Logo  ; Román, Roberto 5   VIAFID ORCID Logo  ; Juan Andrés Casquero-Vera 6   VIAFID ORCID Logo  ; Ortiz-Amezcua, Pablo 6 ; Benavent-Oltra, Jose Antonio 6   VIAFID ORCID Logo  ; Gregori de Arruda Moreira 7 ; Montilla-Rosero, Elena 8 ; Hoyos, Carlos David 9   VIAFID ORCID Logo  ; Artiñano, Begoña 10 ; Coz, Esther 10   VIAFID ORCID Logo  ; Olmo-Reyes, Francisco José 6 ; Lucas Alados-Arboledas 6   VIAFID ORCID Logo  ; Guerrero-Rascado, Juan Luis 6   VIAFID ORCID Logo 

 Andalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006, Granada, Spain; Departament of Applied Physics, University of Granada, Granada, Spain; Sciences Faculty, Department of Physics, Universidad Nacional de Colombia, Medellín, Colombia 
 Federal Office of Meteorology and Climatology MeteoSwiss, Payerne, Switzerland 
 Remote Sensing Laboratory/CommSensLab, Universitat Politècnica de Catalunya, Barcelona, 08034, Spain 
 Andalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006, Granada, Spain; Institute of Environmental Assessment and Water Research (IDAEA), CSIC, Barcelona, 08034, Spain 
 Andalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006, Granada, Spain; Departament of Applied Physics, University of Granada, Granada, Spain; Grupo de Óptica Atmosférica (GOA), Universidad de Valladolid, Paseo Belén, 7, 47011, Valladolid, Spain 
 Andalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006, Granada, Spain; Departament of Applied Physics, University of Granada, Granada, Spain 
 Andalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006, Granada, Spain; Departament of Applied Physics, University of Granada, Granada, Spain; Institute of Research and Nuclear Energy, IPEN, São Paulo, Brazil 
 Physical Sciences Department, School of Science, EAFIT University, Medellín, Colombia 
 Minas Faculty, Department of Geosciences and Environment, Universidad Nacional de Colombia, Medellín, Colombia 
10  CIEMAT, Environment Department, Associated Unit to CSIC on Atmospheric Pollution, Avenida Complutense 40, Madrid, Spain 
Pages
7001-7017
Publication year
2018
Publication date
2018
Publisher
Copernicus GmbH
ISSN
16807316
e-ISSN
16807324
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2187019907
Copyright
© 2018. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.