Forecasting the severity of the Newfoundland iceberg season using a control systems model

Show simple item record Bigg, Grant R. Zhao, Yifan Hanna, Edward 2019-08-22T18:35:55Z 2019-08-22T18:35:55Z 2019-06-20
dc.identifier.citation Bigg GR, Zhao Y, Hanna E. (2019) Forecasting the severity of the Newfoundland iceberg season using a control systems model. Journal of Operational Oceanography, Volume 14, Issue 1, 2021, pp. 24-36 en_UK
dc.identifier.issn 1755-876X
dc.description.abstract The iceberg hazard for the Grand Banks area to the east of Newfoundland varies dramatically from one year to the next. In some years no icebergs penetrate south of 48°N, while in others well over 1000 icebergs enter the main shipping lanes between Europe and NE North America. Advance knowledge of this seasonal hazard would have major implications for ship routing, as well as the resources required for maintaining an effective ice hazard service. Here, a Windowed Error Reduction Ratio control system identification approach is used to forecast the severity of the 2018 iceberg season off Newfoundland, in terms of the predicted number of icebergs crossing 48°N, as well as to hindcast iceberg numbers for 2017. The best estimates are for 766 ± 297 icebergs crossing 48°N before the end of September 2017 and 685 ± 207 for 2018. These are both above the recent observed average of 592 icebergs for that date, and substantially so for 2017. Given the bimodal nature of the annual iceberg number, this means that our predictions for both 2017 and 2018 are for a high iceberg season, with a 71% level of confidence. However, it is most likely that the 2018 iceberg numbers will be somewhat less than 1000, while our higher hindcast for 2017 is consistent with the observed level of 1008. Our verification analysis, covering the 20-year period up to 2016, shows our model's correspondence to the high or low nature of the 48°N iceberg numbers is statistically robust to the 0.05% level, with a skill level of 80%. en_UK
dc.language.iso en en_UK
dc.publisher Taylor and Francis en_UK
dc.rights Attribution-NonCommercial 4.0 International *
dc.rights.uri *
dc.subject Iceberg hazard en_UK
dc.subject Newfoundland en_UK
dc.subject control systems model en_UK
dc.subject prediction en_UK
dc.subject Labrador Current en_UK
dc.subject windowed error reduction ratio en_UK
dc.title Forecasting the severity of the Newfoundland iceberg season using a control systems model en_UK

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