An assessment of three automatic depression tracking schemes
Abstract The performance of three automatic depression tracking schemes developed by Terry & Atlas (1996), Murray & Simmonds (1991a) and Konig et al. (1993) when applied over one month are assessed. The schemes respectively identify depressions by (a) locating the innermost closed contour in...
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crwiley:10.1017/s135048279900119x 2024-06-02T07:57:33+00:00 An assessment of three automatic depression tracking schemes Leonard, S R Turner, J Van Der Wal, A 1999 http://dx.doi.org/10.1017/s135048279900119x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1017%2FS135048279900119X https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1017/S135048279900119X en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Meteorological Applications volume 6, issue 2, page 173-183 ISSN 1350-4827 1469-8080 journal-article 1999 crwiley https://doi.org/10.1017/s135048279900119x 2024-05-03T11:07:36Z Abstract The performance of three automatic depression tracking schemes developed by Terry & Atlas (1996), Murray & Simmonds (1991a) and Konig et al. (1993) when applied over one month are assessed. The schemes respectively identify depressions by (a) locating the innermost closed contour in a PMSL field, (b) finding maxima in the curvature in a bi‐cubic spline fitted to the PMSL data and (c) performing a grid point search to identify a minimum in a PMSL field. The largest number of depressions was found by the Murray and Simmonds scheme, with the Atlas and Terry scheme finding the least. The Murray and Simmonds scheme also found the largest number of tracks, with the other two having comparable numbers of tracks. Two possible explanations for the differences in the number of tracks are considered. Firstly, the case where one or more centres identified by one scheme as corresponding to a single track are not found by the other schemes. Secondly, the case where a single track found by one scheme is split into two or more tracks by the other schemes. All three techniques had a similar latitude of cyclogenesis, although the Atlas and Terry and Konig et al. schemes found more lows at high latitudes as a result of using data on a latitude/longitude grid. The longest mean track length was found with the Konig et al. scheme. A comparison of the PMSL fields with satellite imagery shows that the major NWP centres have trouble producing reliable analyses around the Antarctic because of the lack of data. Copyright © 1999 Royal Meteorological Society Article in Journal/Newspaper Antarc* Antarctic Wiley Online Library Antarctic Simmonds ENVELOPE(159.567,159.567,-70.333,-70.333) The Antarctic Meteorological Applications 6 2 173 183 |
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Wiley Online Library |
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English |
description |
Abstract The performance of three automatic depression tracking schemes developed by Terry & Atlas (1996), Murray & Simmonds (1991a) and Konig et al. (1993) when applied over one month are assessed. The schemes respectively identify depressions by (a) locating the innermost closed contour in a PMSL field, (b) finding maxima in the curvature in a bi‐cubic spline fitted to the PMSL data and (c) performing a grid point search to identify a minimum in a PMSL field. The largest number of depressions was found by the Murray and Simmonds scheme, with the Atlas and Terry scheme finding the least. The Murray and Simmonds scheme also found the largest number of tracks, with the other two having comparable numbers of tracks. Two possible explanations for the differences in the number of tracks are considered. Firstly, the case where one or more centres identified by one scheme as corresponding to a single track are not found by the other schemes. Secondly, the case where a single track found by one scheme is split into two or more tracks by the other schemes. All three techniques had a similar latitude of cyclogenesis, although the Atlas and Terry and Konig et al. schemes found more lows at high latitudes as a result of using data on a latitude/longitude grid. The longest mean track length was found with the Konig et al. scheme. A comparison of the PMSL fields with satellite imagery shows that the major NWP centres have trouble producing reliable analyses around the Antarctic because of the lack of data. Copyright © 1999 Royal Meteorological Society |
format |
Article in Journal/Newspaper |
author |
Leonard, S R Turner, J Van Der Wal, A |
spellingShingle |
Leonard, S R Turner, J Van Der Wal, A An assessment of three automatic depression tracking schemes |
author_facet |
Leonard, S R Turner, J Van Der Wal, A |
author_sort |
Leonard, S R |
title |
An assessment of three automatic depression tracking schemes |
title_short |
An assessment of three automatic depression tracking schemes |
title_full |
An assessment of three automatic depression tracking schemes |
title_fullStr |
An assessment of three automatic depression tracking schemes |
title_full_unstemmed |
An assessment of three automatic depression tracking schemes |
title_sort |
assessment of three automatic depression tracking schemes |
publisher |
Wiley |
publishDate |
1999 |
url |
http://dx.doi.org/10.1017/s135048279900119x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1017%2FS135048279900119X https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1017/S135048279900119X |
long_lat |
ENVELOPE(159.567,159.567,-70.333,-70.333) |
geographic |
Antarctic Simmonds The Antarctic |
geographic_facet |
Antarctic Simmonds The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Meteorological Applications volume 6, issue 2, page 173-183 ISSN 1350-4827 1469-8080 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1017/s135048279900119x |
container_title |
Meteorological Applications |
container_volume |
6 |
container_issue |
2 |
container_start_page |
173 |
op_container_end_page |
183 |
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1800740709240668160 |