Comparative assessment of GRASP algorithm for a dust event over Granada (Spain) during ChArMEx-ADRIMED 2013 campaign
In this study, vertical profiles and column-integrated aerosol properties retrieved by the GRASP (Generalized Retrieval of Atmosphere and Surface Properties) algorithm are evaluated with in situ airborne measurements made during the ChArMEx-ADRIMED field campaign in summer 2013. In the framework...
Main Authors: | , , , , , , , , , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Copernicus Publications
2017-11-01
|
Series: | Atmospheric Measurement Techniques |
Online Access: | https://www.atmos-meas-tech.net/10/4439/2017/amt-10-4439-2017.pdf |
id |
doaj-996fd51ba8fe4fcbb25face2ddfb555c |
---|---|
record_format |
Article |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
J. A. Benavent-Oltra J. A. Benavent-Oltra R. Román R. Román M. J. Granados-Muñoz M. J. Granados-Muñoz D. Pérez-Ramírez D. Pérez-Ramírez P. Ortiz-Amezcua P. Ortiz-Amezcua C. Denjean A. Lopatin H. Lyamani H. Lyamani B. Torres B. Torres J. L. Guerrero-Rascado J. L. Guerrero-Rascado D. Fuertes O. Dubovik A. Chaikovsky F. J. Olmo F. J. Olmo M. Mallet L. Alados-Arboledas L. Alados-Arboledas |
spellingShingle |
J. A. Benavent-Oltra J. A. Benavent-Oltra R. Román R. Román M. J. Granados-Muñoz M. J. Granados-Muñoz D. Pérez-Ramírez D. Pérez-Ramírez P. Ortiz-Amezcua P. Ortiz-Amezcua C. Denjean A. Lopatin H. Lyamani H. Lyamani B. Torres B. Torres J. L. Guerrero-Rascado J. L. Guerrero-Rascado D. Fuertes O. Dubovik A. Chaikovsky F. J. Olmo F. J. Olmo M. Mallet L. Alados-Arboledas L. Alados-Arboledas Comparative assessment of GRASP algorithm for a dust event over Granada (Spain) during ChArMEx-ADRIMED 2013 campaign Atmospheric Measurement Techniques |
author_facet |
J. A. Benavent-Oltra J. A. Benavent-Oltra R. Román R. Román M. J. Granados-Muñoz M. J. Granados-Muñoz D. Pérez-Ramírez D. Pérez-Ramírez P. Ortiz-Amezcua P. Ortiz-Amezcua C. Denjean A. Lopatin H. Lyamani H. Lyamani B. Torres B. Torres J. L. Guerrero-Rascado J. L. Guerrero-Rascado D. Fuertes O. Dubovik A. Chaikovsky F. J. Olmo F. J. Olmo M. Mallet L. Alados-Arboledas L. Alados-Arboledas |
author_sort |
J. A. Benavent-Oltra |
title |
Comparative assessment of GRASP algorithm for a dust event over Granada (Spain) during ChArMEx-ADRIMED 2013 campaign |
title_short |
Comparative assessment of GRASP algorithm for a dust event over Granada (Spain) during ChArMEx-ADRIMED 2013 campaign |
title_full |
Comparative assessment of GRASP algorithm for a dust event over Granada (Spain) during ChArMEx-ADRIMED 2013 campaign |
title_fullStr |
Comparative assessment of GRASP algorithm for a dust event over Granada (Spain) during ChArMEx-ADRIMED 2013 campaign |
title_full_unstemmed |
Comparative assessment of GRASP algorithm for a dust event over Granada (Spain) during ChArMEx-ADRIMED 2013 campaign |
title_sort |
comparative assessment of grasp algorithm for a dust event over granada (spain) during charmex-adrimed 2013 campaign |
publisher |
Copernicus Publications |
series |
Atmospheric Measurement Techniques |
issn |
1867-1381 1867-8548 |
publishDate |
2017-11-01 |
description |
In this study, vertical profiles and column-integrated aerosol properties
retrieved by the GRASP (Generalized Retrieval of Atmosphere and Surface
Properties) algorithm are evaluated with in situ airborne measurements made
during the ChArMEx-ADRIMED field campaign in summer 2013. In the framework of
this campaign, two different flights took place over Granada (Spain) during a
desert dust episode on 16 and 17 June. The GRASP algorithm, which
combines lidar and sun–sky photometer data measured at Granada, was
used to retrieve aerosol properties. Two sun-photometer datasets are
used: one co-located with the lidar system and the other in the Cerro
Poyos station, approximately 1200 m higher than the lidar system but at a
short horizontal distance.
<br><br>
Column-integrated aerosol microphysical properties retrieved by GRASP are
compared with AERONET products showing a good agreement. Differences between
GRASP retrievals and airborne extinction profiles are in the range of 15 to
30 %, depending on the instrument on board the aircraft used as reference.
On 16 June, a case where the dust layer was coupled to the aerosol
layer close to surface, the total volume concentration differences between
in situ data and GRASP retrieval are 15 and 36 % for Granada and Cerro
Poyos retrievals, respectively. In contrast, on 17 June the
dust layer was decoupled from the aerosol layer close to the surface, and the
differences are around 17 % for both retrievals. In general, all the
discrepancies found are within the uncertainly limits, showing the
robustness and reliability of the GRASP algorithm. However, the better agreement
found for the Cerro Poyos retrieval with the aircraft data and the vertical
homogeneity of certain properties retrieved with GRASP, such as the
scattering Ångström exponent, for cases with aerosol layers
characterized by different aerosol types, shows that uncertainties in the
vertical distribution of the aerosol properties have to be considered.
<br><br>
The comparison presented here between GRASP and other algorithms
(i.e. AERONET and LIRIC) and with airborne in situ measurements shows the
potential to retrieve the optical and microphysical profiles of the
atmospheric aerosol properties. Also, the advantage of GRASP versus LIRIC is that GRASP does not assume the results of the AERONET inversion as a starting point. |
url |
https://www.atmos-meas-tech.net/10/4439/2017/amt-10-4439-2017.pdf |
work_keys_str_mv |
AT jabenaventoltra comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT jabenaventoltra comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT rroman comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT rroman comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT mjgranadosmunoz comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT mjgranadosmunoz comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT dperezramirez comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT dperezramirez comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT portizamezcua comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT portizamezcua comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT cdenjean comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT alopatin comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT hlyamani comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT hlyamani comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT btorres comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT btorres comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT jlguerrerorascado comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT jlguerrerorascado comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT dfuertes comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT odubovik comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT achaikovsky comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT fjolmo comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT fjolmo comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT mmallet comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT laladosarboledas comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign AT laladosarboledas comparativeassessmentofgraspalgorithmforadusteventovergranadaspainduringcharmexadrimed2013campaign |
_version_ |
1725506620407939072 |
spelling |
doaj-996fd51ba8fe4fcbb25face2ddfb555c2020-11-24T23:41:34ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482017-11-01104439445710.5194/amt-10-4439-2017Comparative assessment of GRASP algorithm for a dust event over Granada (Spain) during ChArMEx-ADRIMED 2013 campaignJ. A. Benavent-Oltra0J. A. Benavent-Oltra1R. Román2R. Román3M. J. Granados-Muñoz4M. J. Granados-Muñoz5D. Pérez-Ramírez6D. Pérez-Ramírez7P. Ortiz-Amezcua8P. Ortiz-Amezcua9C. Denjean10A. Lopatin11H. Lyamani12H. Lyamani13B. Torres14B. Torres15J. L. Guerrero-Rascado16J. L. Guerrero-Rascado17D. Fuertes18O. Dubovik19A. Chaikovsky20F. J. Olmo21F. J. Olmo22M. Mallet23L. Alados-Arboledas24L. Alados-Arboledas25Department of Applied Physics, University of Granada, 18071 Granada, SpainAndalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006 Granada, SpainDepartment of Applied Physics, University of Granada, 18071 Granada, SpainAndalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006 Granada, SpainDepartment of Applied Physics, University of Granada, 18071 Granada, SpainAndalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006 Granada, SpainDepartment of Applied Physics, University of Granada, 18071 Granada, SpainAndalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006 Granada, SpainDepartment of Applied Physics, University of Granada, 18071 Granada, SpainAndalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006 Granada, SpainCNRM, Centre National de la Recherche Météorologique (UMR3589, CNRS, Météo-France), Toulouse, FranceLaboratoire d'Optique Atmosphérique, Université de Lille 1, Villeneuve d'Ascq, FranceDepartment of Applied Physics, University of Granada, 18071 Granada, SpainAndalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006 Granada, SpainLaboratoire d'Optique Atmosphérique, Université de Lille 1, Villeneuve d'Ascq, FranceGRASP-SAS, Remote sensing developments, LOA/Université Lille-1, Villeneuve d'Ascq, FranceDepartment of Applied Physics, University of Granada, 18071 Granada, SpainAndalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006 Granada, SpainGRASP-SAS, Remote sensing developments, LOA/Université Lille-1, Villeneuve d'Ascq, FranceLaboratoire d'Optique Atmosphérique, Université de Lille 1, Villeneuve d'Ascq, FranceInstitute of Physics, National Academy of Science, Minsk, BelarusDepartment of Applied Physics, University of Granada, 18071 Granada, SpainAndalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006 Granada, SpainCNRM, Centre National de la Recherche Météorologique (UMR3589, CNRS, Météo-France), Toulouse, FranceDepartment of Applied Physics, University of Granada, 18071 Granada, SpainAndalusian Institute for Earth System Research (IISTA-CEAMA), University of Granada, Autonomous Government of Andalusia, 18006 Granada, SpainIn this study, vertical profiles and column-integrated aerosol properties retrieved by the GRASP (Generalized Retrieval of Atmosphere and Surface Properties) algorithm are evaluated with in situ airborne measurements made during the ChArMEx-ADRIMED field campaign in summer 2013. In the framework of this campaign, two different flights took place over Granada (Spain) during a desert dust episode on 16 and 17 June. The GRASP algorithm, which combines lidar and sun–sky photometer data measured at Granada, was used to retrieve aerosol properties. Two sun-photometer datasets are used: one co-located with the lidar system and the other in the Cerro Poyos station, approximately 1200 m higher than the lidar system but at a short horizontal distance. <br><br> Column-integrated aerosol microphysical properties retrieved by GRASP are compared with AERONET products showing a good agreement. Differences between GRASP retrievals and airborne extinction profiles are in the range of 15 to 30 %, depending on the instrument on board the aircraft used as reference. On 16 June, a case where the dust layer was coupled to the aerosol layer close to surface, the total volume concentration differences between in situ data and GRASP retrieval are 15 and 36 % for Granada and Cerro Poyos retrievals, respectively. In contrast, on 17 June the dust layer was decoupled from the aerosol layer close to the surface, and the differences are around 17 % for both retrievals. In general, all the discrepancies found are within the uncertainly limits, showing the robustness and reliability of the GRASP algorithm. However, the better agreement found for the Cerro Poyos retrieval with the aircraft data and the vertical homogeneity of certain properties retrieved with GRASP, such as the scattering Ångström exponent, for cases with aerosol layers characterized by different aerosol types, shows that uncertainties in the vertical distribution of the aerosol properties have to be considered. <br><br> The comparison presented here between GRASP and other algorithms (i.e. AERONET and LIRIC) and with airborne in situ measurements shows the potential to retrieve the optical and microphysical profiles of the atmospheric aerosol properties. Also, the advantage of GRASP versus LIRIC is that GRASP does not assume the results of the AERONET inversion as a starting point.https://www.atmos-meas-tech.net/10/4439/2017/amt-10-4439-2017.pdf |