A new methodology for PBL height estimations based on lidar depolarization measurements: analysis and comparison against MWR and WRF model-based results
The automatic and non-supervised detection of the planetary boundary layer height (<i>z</i><sub>PBL</sub>) by means of lidar measurements was widely investigated during the last several years. Despite considerable advances, the experimental detection still presents diffic...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2017-06-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/17/6839/2017/acp-17-6839-2017.pdf |
| _version_ | 1819147704913100800 |
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| author | J. A. Bravo-Aranda J. A. Bravo-Aranda J. A. Bravo-Aranda G. de Arruda Moreira F. Navas-Guzmán M. J. Granados-Muñoz M. J. Granados-Muñoz M. J. Granados-Muñoz J. L. Guerrero-Rascado J. L. Guerrero-Rascado D. Pozo-Vázquez C. Arbizu-Barrena F. J. Olmo Reyes F. J. Olmo Reyes M. Mallet L. Alados Arboledas L. Alados Arboledas |
| author_facet | J. A. Bravo-Aranda J. A. Bravo-Aranda J. A. Bravo-Aranda G. de Arruda Moreira F. Navas-Guzmán M. J. Granados-Muñoz M. J. Granados-Muñoz M. J. Granados-Muñoz J. L. Guerrero-Rascado J. L. Guerrero-Rascado D. Pozo-Vázquez C. Arbizu-Barrena F. J. Olmo Reyes F. J. Olmo Reyes M. Mallet L. Alados Arboledas L. Alados Arboledas |
| author_sort | J. A. Bravo-Aranda |
| collection | DOAJ |
| description | The automatic and non-supervised detection of the planetary boundary layer
height (<i>z</i><sub>PBL</sub>) by means of lidar measurements was widely investigated
during the last several years.
Despite considerable advances, the experimental
detection still presents difficulties such as advected aerosol layers
coupled to the planetary boundary layer (PBL) which usually produces an overestimation of the <i>z</i><sub>PBL</sub>.
To improve the detection of the <i>z</i><sub>PBL</sub> in these complex atmospheric
situations, we present a new algorithm, called POLARIS (PBL height
estimation based on lidar depolarisation). POLARIS applies the wavelet
covariance transform (WCT) to the range-corrected signal (RCS) and to the
perpendicular-to-parallel signal ratio (<i>δ</i>) profiles. Different
candidates for <i>z</i><sub>PBL</sub> are chosen and the selection is done based on the
WCT applied to the RCS and <i>δ</i>. We use two ChArMEx (Chemistry-Aerosol Mediterranean Experiment)
campaigns with
lidar and microwave radiometer (MWR) measurements, conducted in 2012 and
2013, for the POLARIS' adjustment and validation. POLARIS improves the
<i>z</i><sub>PBL</sub> detection compared to previous methods based on lidar
measurements, especially when an aerosol layer is coupled to the PBL. We also
compare the <i>z</i><sub>PBL</sub> provided by the Weather Research and Forecasting (WRF)
numerical weather prediction (NWP) model with respect to the <i>z</i><sub>PBL</sub> determined
with POLARIS and the MWR under Saharan dust events. WRF underestimates the
<i>z</i><sub>PBL</sub> during daytime but agrees with the MWR during night-time. The
<i>z</i><sub>PBL</sub> provided by WRF shows a better temporal evolution compared
to
the MWR during daytime than during night-time. |
| first_indexed | 2024-12-22T13:34:03Z |
| format | Article |
| id | doaj.art-774515b44e97411bb69ea2a60aa5e6dc |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-22T13:34:03Z |
| publishDate | 2017-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-774515b44e97411bb69ea2a60aa5e6dc2022-12-21T18:24:06ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242017-06-01176839685110.5194/acp-17-6839-2017A new methodology for PBL height estimations based on lidar depolarization measurements: analysis and comparison against MWR and WRF model-based resultsJ. A. Bravo-Aranda0J. A. Bravo-Aranda1J. A. Bravo-Aranda2G. de Arruda Moreira3F. Navas-Guzmán4M. J. Granados-Muñoz5M. J. Granados-Muñoz6M. J. Granados-Muñoz7J. L. Guerrero-Rascado8J. L. Guerrero-Rascado9D. Pozo-Vázquez10C. Arbizu-Barrena11F. J. Olmo Reyes12F. J. Olmo Reyes13M. Mallet14L. Alados Arboledas15L. Alados Arboledas16Andalusian Institute for Earth System Research (IISTA-CEAMA), Granada, SpainDepartment of Applied Physics, University of Granada, Granada, Spainnow at: Institut Pierre-Simon Laplace, CNRS–Ecole Polytechnique, Paris, FranceInstitute of Energetic and Nuclear Research (IPEN), São Paulo, BrazilInstitute of Applied Physics (IAP), University of Bern, Bern, SwitzerlandAndalusian Institute for Earth System Research (IISTA-CEAMA), Granada, SpainDepartment of Applied Physics, University of Granada, Granada, Spaincurrently at: Table Mountain Facility, NASA/Jet Propulsion Laboratory, California Institute of Technology, Wrightwood, California, USAAndalusian Institute for Earth System Research (IISTA-CEAMA), Granada, SpainDepartment of Applied Physics, University of Granada, Granada, SpainDepartment of Physics, University of Jaén, Jaén, SpainDepartment of Physics, University of Jaén, Jaén, SpainAndalusian Institute for Earth System Research (IISTA-CEAMA), Granada, SpainDepartment of Applied Physics, University of Granada, Granada, SpainCentre National de Recherches Météorologiques, UMR 3589, Météo-France/CNRS, Toulouse, FranceAndalusian Institute for Earth System Research (IISTA-CEAMA), Granada, SpainDepartment of Applied Physics, University of Granada, Granada, SpainThe automatic and non-supervised detection of the planetary boundary layer height (<i>z</i><sub>PBL</sub>) by means of lidar measurements was widely investigated during the last several years. Despite considerable advances, the experimental detection still presents difficulties such as advected aerosol layers coupled to the planetary boundary layer (PBL) which usually produces an overestimation of the <i>z</i><sub>PBL</sub>. To improve the detection of the <i>z</i><sub>PBL</sub> in these complex atmospheric situations, we present a new algorithm, called POLARIS (PBL height estimation based on lidar depolarisation). POLARIS applies the wavelet covariance transform (WCT) to the range-corrected signal (RCS) and to the perpendicular-to-parallel signal ratio (<i>δ</i>) profiles. Different candidates for <i>z</i><sub>PBL</sub> are chosen and the selection is done based on the WCT applied to the RCS and <i>δ</i>. We use two ChArMEx (Chemistry-Aerosol Mediterranean Experiment) campaigns with lidar and microwave radiometer (MWR) measurements, conducted in 2012 and 2013, for the POLARIS' adjustment and validation. POLARIS improves the <i>z</i><sub>PBL</sub> detection compared to previous methods based on lidar measurements, especially when an aerosol layer is coupled to the PBL. We also compare the <i>z</i><sub>PBL</sub> provided by the Weather Research and Forecasting (WRF) numerical weather prediction (NWP) model with respect to the <i>z</i><sub>PBL</sub> determined with POLARIS and the MWR under Saharan dust events. WRF underestimates the <i>z</i><sub>PBL</sub> during daytime but agrees with the MWR during night-time. The <i>z</i><sub>PBL</sub> provided by WRF shows a better temporal evolution compared to the MWR during daytime than during night-time.http://www.atmos-chem-phys.net/17/6839/2017/acp-17-6839-2017.pdf |
| spellingShingle | J. A. Bravo-Aranda J. A. Bravo-Aranda J. A. Bravo-Aranda G. de Arruda Moreira F. Navas-Guzmán M. J. Granados-Muñoz M. J. Granados-Muñoz M. J. Granados-Muñoz J. L. Guerrero-Rascado J. L. Guerrero-Rascado D. Pozo-Vázquez C. Arbizu-Barrena F. J. Olmo Reyes F. J. Olmo Reyes M. Mallet L. Alados Arboledas L. Alados Arboledas A new methodology for PBL height estimations based on lidar depolarization measurements: analysis and comparison against MWR and WRF model-based results Atmospheric Chemistry and Physics |
| title | A new methodology for PBL height estimations based on lidar depolarization measurements: analysis and comparison against MWR and WRF model-based results |
| title_full | A new methodology for PBL height estimations based on lidar depolarization measurements: analysis and comparison against MWR and WRF model-based results |
| title_fullStr | A new methodology for PBL height estimations based on lidar depolarization measurements: analysis and comparison against MWR and WRF model-based results |
| title_full_unstemmed | A new methodology for PBL height estimations based on lidar depolarization measurements: analysis and comparison against MWR and WRF model-based results |
| title_short | A new methodology for PBL height estimations based on lidar depolarization measurements: analysis and comparison against MWR and WRF model-based results |
| title_sort | new methodology for pbl height estimations based on lidar depolarization measurements analysis and comparison against mwr and wrf model based results |
| url | http://www.atmos-chem-phys.net/17/6839/2017/acp-17-6839-2017.pdf |
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