Ceilometer evaluation of the eastern Mediterranean summer boundary layer height – first study of two Israeli sites
Active remote-sensing instruments, such as ceilometers, have been shown to be potentially useful for the investigation of the behavior of the atmospheric mixing layer height (MLH). For the first time ever, high-resolution measurements of backscatter intensity, taken from two CL31 ceilometers situate...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2016-09-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | http://www.atmos-meas-tech.net/9/4387/2016/amt-9-4387-2016.pdf |
| Summary: | Active remote-sensing instruments, such as ceilometers,
have been shown to be potentially useful for the investigation of the
behavior of the atmospheric mixing layer height (MLH). For the first time
ever, high-resolution measurements of backscatter intensity, taken from two
CL31 ceilometers situated inland and onshore of Israel, have enabled
evaluation of the mean diurnal cycle of the MLH in the eastern Mediterranean
region. Although the Israeli summer synoptic conditions are considered to be quite stable, results for the summer season (July–August 2014) showed the inland MLH to be about 200 m higher than the MLH at the onshore
site, situated only 7.5 km away. The prevailing influence of the sea breeze
front (SBF), as it progresses inland, is presented by the ceilometer plots.
Complementing results were found between the radiosonde profiles and the
adjacent ceilometer at the inland site of Beit Dagan. In contrast to the
expected regularity of clear skies during the Israeli summer, the
ceilometers revealed significant cloud cover throughout the day, with higher
presence onshore. Assessment of cloud thickness in further research would
serve to improve the evaluation of the MLH evolution. |
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| ISSN: | 1867-1381 1867-8548 |