Study of Droplet Activation in Thin Clouds Using Ground-Based Raman Lidar and Ancillary Remote Sensors
A methodology for the study of cloud droplet activation based on the measurements performed with ground-based multi-wavelength Raman lidars and ancillary remote sensors collected at CNR-IMAA observatory, Potenza, South Italy, is presented. The study is focused on the observation of thin warm clouds....
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2016-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/epjconf/201611916008 |
| _version_ | 1818455731287883776 |
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| author | Rosoldi Marco Madonna Fabio Claramunt Pilar Gumà Pappalardo Gelsomina |
| author_facet | Rosoldi Marco Madonna Fabio Claramunt Pilar Gumà Pappalardo Gelsomina |
| author_sort | Rosoldi Marco |
| collection | DOAJ |
| description | A methodology for the study of cloud droplet activation based on the measurements performed with ground-based multi-wavelength Raman lidars and ancillary remote sensors collected at CNR-IMAA observatory, Potenza, South Italy, is presented. The study is focused on the observation of thin warm clouds. Thin clouds are often also optically thin: this allows the cloud top detection and the full profiling of cloud layers using ground-based Raman lidar. Moreover, broken clouds are inspected to take advantage of their discontinuous structure in order to study the variability of optical properties and water vapor content in the transition from cloudy regions to cloudless regions close to the cloud boundaries. A statistical study of this variability leads to identify threshold values for the optical properties, enabling the discrimination between clouds and cloudless regions. These values can be used to evaluate and improve parameterizations of droplet activation within numerical models. A statistical study of the co-located Doppler radar moments allows to retrieve droplet size and vertical velocities close to the cloud base. First evidences of a correlation between droplet vertical velocities measured at the cloud base and the aerosol effective radius observed in the cloud-free regions of the broken clouds are found. |
| first_indexed | 2024-12-14T22:15:26Z |
| format | Article |
| id | doaj.art-efa9fcf71b754ce2b0939554df6a264e |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-14T22:15:26Z |
| publishDate | 2016-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-efa9fcf71b754ce2b0939554df6a264e2022-12-21T22:45:38ZengEDP SciencesEPJ Web of Conferences2100-014X2016-01-011191600810.1051/epjconf/201611916008epjconf_ilrc2016_16008Study of Droplet Activation in Thin Clouds Using Ground-Based Raman Lidar and Ancillary Remote SensorsRosoldi Marco0Madonna Fabio1Claramunt Pilar Gumà2Pappalardo Gelsomina3Consiglio Nazionale delle Ricerche (CNR), Istituto di Metodologie per l’Analisi Ambientale (IMAA)Consiglio Nazionale delle Ricerche (CNR), Istituto di Metodologie per l’Analisi Ambientale (IMAA)Consiglio Nazionale delle Ricerche (CNR), Istituto di Metodologie per l’Analisi Ambientale (IMAA)Consiglio Nazionale delle Ricerche (CNR), Istituto di Metodologie per l’Analisi Ambientale (IMAA)A methodology for the study of cloud droplet activation based on the measurements performed with ground-based multi-wavelength Raman lidars and ancillary remote sensors collected at CNR-IMAA observatory, Potenza, South Italy, is presented. The study is focused on the observation of thin warm clouds. Thin clouds are often also optically thin: this allows the cloud top detection and the full profiling of cloud layers using ground-based Raman lidar. Moreover, broken clouds are inspected to take advantage of their discontinuous structure in order to study the variability of optical properties and water vapor content in the transition from cloudy regions to cloudless regions close to the cloud boundaries. A statistical study of this variability leads to identify threshold values for the optical properties, enabling the discrimination between clouds and cloudless regions. These values can be used to evaluate and improve parameterizations of droplet activation within numerical models. A statistical study of the co-located Doppler radar moments allows to retrieve droplet size and vertical velocities close to the cloud base. First evidences of a correlation between droplet vertical velocities measured at the cloud base and the aerosol effective radius observed in the cloud-free regions of the broken clouds are found.http://dx.doi.org/10.1051/epjconf/201611916008 |
| spellingShingle | Rosoldi Marco Madonna Fabio Claramunt Pilar Gumà Pappalardo Gelsomina Study of Droplet Activation in Thin Clouds Using Ground-Based Raman Lidar and Ancillary Remote Sensors EPJ Web of Conferences |
| title | Study of Droplet Activation in Thin Clouds Using Ground-Based Raman Lidar and Ancillary Remote Sensors |
| title_full | Study of Droplet Activation in Thin Clouds Using Ground-Based Raman Lidar and Ancillary Remote Sensors |
| title_fullStr | Study of Droplet Activation in Thin Clouds Using Ground-Based Raman Lidar and Ancillary Remote Sensors |
| title_full_unstemmed | Study of Droplet Activation in Thin Clouds Using Ground-Based Raman Lidar and Ancillary Remote Sensors |
| title_short | Study of Droplet Activation in Thin Clouds Using Ground-Based Raman Lidar and Ancillary Remote Sensors |
| title_sort | study of droplet activation in thin clouds using ground based raman lidar and ancillary remote sensors |
| url | http://dx.doi.org/10.1051/epjconf/201611916008 |
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