Planetary boundary layer height by means of lidar and numerical simulations over New Delhi, India
<p>In this work, the height of the planetary boundary layer (PBLH) is investigated over Gwal Pahari (Gual Pahari), New Delhi, for almost a year. To this end, ground-based measurements from a multiwavelength Raman lidar were used. The modified wavelet covariance transform (WCT) method was utili...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2019-05-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://www.atmos-meas-tech.net/12/2595/2019/amt-12-2595-2019.pdf |
| _version_ | 1818243257290719232 |
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| author | K. Nakoudi K. Nakoudi K. Nakoudi E. Giannakaki E. Giannakaki A. Dandou M. Tombrou M. Komppula |
| author_facet | K. Nakoudi K. Nakoudi K. Nakoudi E. Giannakaki E. Giannakaki A. Dandou M. Tombrou M. Komppula |
| author_sort | K. Nakoudi |
| collection | DOAJ |
| description | <p>In this work, the height of the planetary boundary layer
(PBLH) is investigated over Gwal Pahari (Gual Pahari), New Delhi, for almost a year. To
this end, ground-based measurements from a multiwavelength Raman lidar
were used. The modified wavelet covariance transform (WCT) method was
utilized for PBLH retrievals. Results were compared to data from
Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO)
and the Weather Research and Forecasting (WRF) model. In order to examine
the difficulties of PBLH detection from lidar, we analyzed three cases of
PBLH diurnal evolution under different meteorological and aerosol load
conditions. In the presence of multiple aerosol layers, the employed
algorithm exhibited high efficiency (<span class="inline-formula"><i>r</i>=0.9</span>) in the attribution of PBLH,
whereas weak aerosol gradients induced high variability in the PBLH. A
sensitivity analysis corroborated the stability of the utilized methodology.
The comparison with CALIPSO observations yielded satisfying results
(<span class="inline-formula"><i>r</i>=0.8</span>), with CALIPSO slightly overestimating the PBLH. Due to the relatively
warmer and drier winter and, correspondingly, colder and rainier pre-monsoon
season, the seasonal PBLH cycle during the measurement period was slightly
weaker than the cycle expected from long-term climate records.</p> |
| first_indexed | 2024-12-12T13:58:15Z |
| format | Article |
| id | doaj.art-ff8fae86b9524766b878faf9d16395f5 |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-12-12T13:58:15Z |
| publishDate | 2019-05-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-ff8fae86b9524766b878faf9d16395f52022-12-22T00:22:25ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482019-05-01122595261010.5194/amt-12-2595-2019Planetary boundary layer height by means of lidar and numerical simulations over New Delhi, IndiaK. Nakoudi0K. Nakoudi1K. Nakoudi2E. Giannakaki3E. Giannakaki4A. Dandou5M. Tombrou6M. Komppula7Department of Environmental Physics and Meteorology, Faculty of Physics, University of Athens, Athens, GreeceAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam, GermanyInstitute of Physics and Astronomy, University of Potsdam, Potsdam, GermanyDepartment of Environmental Physics and Meteorology, Faculty of Physics, University of Athens, Athens, GreeceFinnish Meteorological Institute, Kuopio, FinlandDepartment of Environmental Physics and Meteorology, Faculty of Physics, University of Athens, Athens, GreeceDepartment of Environmental Physics and Meteorology, Faculty of Physics, University of Athens, Athens, GreeceFinnish Meteorological Institute, Kuopio, Finland<p>In this work, the height of the planetary boundary layer (PBLH) is investigated over Gwal Pahari (Gual Pahari), New Delhi, for almost a year. To this end, ground-based measurements from a multiwavelength Raman lidar were used. The modified wavelet covariance transform (WCT) method was utilized for PBLH retrievals. Results were compared to data from Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) and the Weather Research and Forecasting (WRF) model. In order to examine the difficulties of PBLH detection from lidar, we analyzed three cases of PBLH diurnal evolution under different meteorological and aerosol load conditions. In the presence of multiple aerosol layers, the employed algorithm exhibited high efficiency (<span class="inline-formula"><i>r</i>=0.9</span>) in the attribution of PBLH, whereas weak aerosol gradients induced high variability in the PBLH. A sensitivity analysis corroborated the stability of the utilized methodology. The comparison with CALIPSO observations yielded satisfying results (<span class="inline-formula"><i>r</i>=0.8</span>), with CALIPSO slightly overestimating the PBLH. Due to the relatively warmer and drier winter and, correspondingly, colder and rainier pre-monsoon season, the seasonal PBLH cycle during the measurement period was slightly weaker than the cycle expected from long-term climate records.</p>https://www.atmos-meas-tech.net/12/2595/2019/amt-12-2595-2019.pdf |
| spellingShingle | K. Nakoudi K. Nakoudi K. Nakoudi E. Giannakaki E. Giannakaki A. Dandou M. Tombrou M. Komppula Planetary boundary layer height by means of lidar and numerical simulations over New Delhi, India Atmospheric Measurement Techniques |
| title | Planetary boundary layer height by means of lidar and numerical simulations over New Delhi, India |
| title_full | Planetary boundary layer height by means of lidar and numerical simulations over New Delhi, India |
| title_fullStr | Planetary boundary layer height by means of lidar and numerical simulations over New Delhi, India |
| title_full_unstemmed | Planetary boundary layer height by means of lidar and numerical simulations over New Delhi, India |
| title_short | Planetary boundary layer height by means of lidar and numerical simulations over New Delhi, India |
| title_sort | planetary boundary layer height by means of lidar and numerical simulations over new delhi india |
| url | https://www.atmos-meas-tech.net/12/2595/2019/amt-12-2595-2019.pdf |
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