Development and application of a method for the objective differentiation of fog life cycle phases
An objective classification of radiation fog in distinct evolutionary stages during its life cycle based on reliable criteria is essential for various applications, for example for numerical fog modelling and fog forecasting. However, there have been – up to now – merely qualit...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Stockholm University Press
2013-06-01
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| Series: | Tellus: Series B, Chemical and Physical Meteorology |
| Subjects: | |
| Online Access: | http://www.tellusb.net/index.php/tellusb/article/download/19971/pdf_1 |
| _version_ | 1811302270012227584 |
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| author | Frank Maier Jörg Bendix Boris Thies |
| author_facet | Frank Maier Jörg Bendix Boris Thies |
| author_sort | Frank Maier |
| collection | DOAJ |
| description | An objective classification of radiation fog in distinct evolutionary stages during its life cycle based on reliable criteria is essential for various applications, for example for numerical fog modelling and fog forecasting. However, there have been – up to now – merely qualitative approaches for the distinction of different evolutionary stages in radiation fog. Measurements of the microphysical fog properties with an optical particle counter obtained from droplet measurement technologies together with recordings of the horizontal visibility (VIS) are statistically analyzed to determine individual evolutionary stages of radiation fog with consistent microphysical properties. The developed three-stage approach is based on a statistical change point analysis of the double sum curves of the VIS, the liquid water content, the droplet concentration and the mean radius of the drop size distributions. It could be shown that each of the three recorded radiation fog occurrences could be split into three consecutive phases from formation to dissipation, regardless whether the VIS or the microphysical properties were considered. Having featured consistent microphysical patterns, it could be assumed that the three separated phases of the single fog occurrence could be aggregated for radiation fog. Although this classification is statistically reliable, the dataset still has to be extended for a generalization concerning the separated evolutionary stages. |
| first_indexed | 2024-04-13T07:25:04Z |
| format | Article |
| id | doaj.art-bfadf0ad95d2476497f6610c42202aef |
| institution | Directory Open Access Journal |
| issn | 1600-0889 |
| language | English |
| last_indexed | 2024-04-13T07:25:04Z |
| publishDate | 2013-06-01 |
| publisher | Stockholm University Press |
| record_format | Article |
| series | Tellus: Series B, Chemical and Physical Meteorology |
| spelling | doaj.art-bfadf0ad95d2476497f6610c42202aef2022-12-22T02:56:30ZengStockholm University PressTellus: Series B, Chemical and Physical Meteorology1600-08892013-06-0165011710.3402/tellusb.v65i0.19971Development and application of a method for the objective differentiation of fog life cycle phasesFrank MaierJörg BendixBoris ThiesAn objective classification of radiation fog in distinct evolutionary stages during its life cycle based on reliable criteria is essential for various applications, for example for numerical fog modelling and fog forecasting. However, there have been – up to now – merely qualitative approaches for the distinction of different evolutionary stages in radiation fog. Measurements of the microphysical fog properties with an optical particle counter obtained from droplet measurement technologies together with recordings of the horizontal visibility (VIS) are statistically analyzed to determine individual evolutionary stages of radiation fog with consistent microphysical properties. The developed three-stage approach is based on a statistical change point analysis of the double sum curves of the VIS, the liquid water content, the droplet concentration and the mean radius of the drop size distributions. It could be shown that each of the three recorded radiation fog occurrences could be split into three consecutive phases from formation to dissipation, regardless whether the VIS or the microphysical properties were considered. Having featured consistent microphysical patterns, it could be assumed that the three separated phases of the single fog occurrence could be aggregated for radiation fog. Although this classification is statistically reliable, the dataset still has to be extended for a generalization concerning the separated evolutionary stages.http://www.tellusb.net/index.php/tellusb/article/download/19971/pdf_1radiation fogdouble sum curve analysislife cycle of radiation fogevolutionary stages of radiation fog |
| spellingShingle | Frank Maier Jörg Bendix Boris Thies Development and application of a method for the objective differentiation of fog life cycle phases Tellus: Series B, Chemical and Physical Meteorology radiation fog double sum curve analysis life cycle of radiation fog evolutionary stages of radiation fog |
| title | Development and application of a method for the objective differentiation of fog life cycle phases |
| title_full | Development and application of a method for the objective differentiation of fog life cycle phases |
| title_fullStr | Development and application of a method for the objective differentiation of fog life cycle phases |
| title_full_unstemmed | Development and application of a method for the objective differentiation of fog life cycle phases |
| title_short | Development and application of a method for the objective differentiation of fog life cycle phases |
| title_sort | development and application of a method for the objective differentiation of fog life cycle phases |
| topic | radiation fog double sum curve analysis life cycle of radiation fog evolutionary stages of radiation fog |
| url | http://www.tellusb.net/index.php/tellusb/article/download/19971/pdf_1 |
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