Use of ZDR columns for early detection of severe convection within the operational radar network of the United Kingdom
Abstract Differential reflectivity (ZDR) columns were observed using a Met Office three‐dimensional radar composite. An algorithm for automatic detection of ZDR columns was developed, based on ZDR≥1.0 dB and ZH≥10 dBZ. Across three case days, detected ZDR columns were found to precede severe convect...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2024-01-01
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| Series: | Meteorological Applications |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/met.2159 |
| _version_ | 1797293750954754048 |
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| author | Chun Hay Brian Lo Thorwald H. M. Stein Robert W. Scovell Chris D. Westbrook Timothy Darlington Humphrey W. Lean |
| author_facet | Chun Hay Brian Lo Thorwald H. M. Stein Robert W. Scovell Chris D. Westbrook Timothy Darlington Humphrey W. Lean |
| author_sort | Chun Hay Brian Lo |
| collection | DOAJ |
| description | Abstract Differential reflectivity (ZDR) columns were observed using a Met Office three‐dimensional radar composite. An algorithm for automatic detection of ZDR columns was developed, based on ZDR≥1.0 dB and ZH≥10 dBZ. Across three case days, detected ZDR columns were found to precede severe convection in tracked convective cells with a range of lead times from 0 to 20 min depending on the case day. Requiring maxima above 1.4 dB and 30 dBZ of ZDR and ZH respectively was an appropriate second condition for all three cases although the skill in the early detection of severe convection varied across case days. Despite the high probability of detections, the high false alarm rate accompanied by low critical success index and data latency limit performance based on the three cases considered in this study. Nevertheless, the ability to detect ZDR columns in operational radar data with a useful lead time prior to severe convection in certain conditions is a promising development towards advancing nowcasting of severe convection in the United Kingdom. |
| first_indexed | 2024-03-07T21:19:16Z |
| format | Article |
| id | doaj.art-c0f4e8167dc548d799a53d1489aba30c |
| institution | Directory Open Access Journal |
| issn | 1350-4827 1469-8080 |
| language | English |
| last_indexed | 2024-03-07T21:19:16Z |
| publishDate | 2024-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Meteorological Applications |
| spelling | doaj.art-c0f4e8167dc548d799a53d1489aba30c2024-02-27T15:02:38ZengWileyMeteorological Applications1350-48271469-80802024-01-01311n/an/a10.1002/met.2159Use of ZDR columns for early detection of severe convection within the operational radar network of the United KingdomChun Hay Brian Lo0Thorwald H. M. Stein1Robert W. Scovell2Chris D. Westbrook3Timothy Darlington4Humphrey W. Lean5Department of Meteorology University of Reading Reading UKDepartment of Meteorology University of Reading Reading UKMet Office Exeter UKDepartment of Meteorology University of Reading Reading UKMet Office Exeter UKMetOffice@Reading Reading UKAbstract Differential reflectivity (ZDR) columns were observed using a Met Office three‐dimensional radar composite. An algorithm for automatic detection of ZDR columns was developed, based on ZDR≥1.0 dB and ZH≥10 dBZ. Across three case days, detected ZDR columns were found to precede severe convection in tracked convective cells with a range of lead times from 0 to 20 min depending on the case day. Requiring maxima above 1.4 dB and 30 dBZ of ZDR and ZH respectively was an appropriate second condition for all three cases although the skill in the early detection of severe convection varied across case days. Despite the high probability of detections, the high false alarm rate accompanied by low critical success index and data latency limit performance based on the three cases considered in this study. Nevertheless, the ability to detect ZDR columns in operational radar data with a useful lead time prior to severe convection in certain conditions is a promising development towards advancing nowcasting of severe convection in the United Kingdom.https://doi.org/10.1002/met.2159nowcastingpolarimetric radar |
| spellingShingle | Chun Hay Brian Lo Thorwald H. M. Stein Robert W. Scovell Chris D. Westbrook Timothy Darlington Humphrey W. Lean Use of ZDR columns for early detection of severe convection within the operational radar network of the United Kingdom Meteorological Applications nowcasting polarimetric radar |
| title | Use of ZDR columns for early detection of severe convection within the operational radar network of the United Kingdom |
| title_full | Use of ZDR columns for early detection of severe convection within the operational radar network of the United Kingdom |
| title_fullStr | Use of ZDR columns for early detection of severe convection within the operational radar network of the United Kingdom |
| title_full_unstemmed | Use of ZDR columns for early detection of severe convection within the operational radar network of the United Kingdom |
| title_short | Use of ZDR columns for early detection of severe convection within the operational radar network of the United Kingdom |
| title_sort | use of zdr columns for early detection of severe convection within the operational radar network of the united kingdom |
| topic | nowcasting polarimetric radar |
| url | https://doi.org/10.1002/met.2159 |
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