Fealy, Rowan and Mills, Gerald (2018) Deriving Lamb weather types suited to regional climate studies: A case study on the synoptic origins of precipitation over Ireland. International Journal of Climatology, 38 (8). pp. 3439-3448. ISSN 0899-8418

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Abstract

The Lamb weather type (LWT) categorization system is one of the best known procedures for summarizing the synoptic circulations that regulate daily weather. Traditionally, it is applied to daily sea level pressure, centred on a domain over the British Isles (BI), which is classed into one of 27 types (or 7 main types). The available register of LWTBI extends to the mid-19th century and has provided a valuable context for understanding the reasons for temporal and spatial variations in recorded weather elements, especially precipitation. Much of what is known of the synoptic origins of precipitation in Ireland has been based on the LWTBI, although it lies in the western part of this domain. While the original classification was based on manual assessment of weather maps, numerical methods can now be employed to objectively classify a pressure field into a LWT. As a result, it is possible to redefine the region of interest. In this study we applied the objective method to a new domain centred on Ireland (LWTIR). The article compares the catalogue of LWT created for the new domain with that available for the original domain; while the overall synoptic climatology does not change, the sequence of LWT classes differs considerably. As a result, the interpretation of the synoptic origins of precipitation over Ireland is modified and this directs research to new areas of enquiry. This new LWT register that is focused on Ireland provides a more useful context for studying Irish climate and demonstrates the value of the objective method.

Item Type:	Article
Additional Information:	COBE-SST2 data provided by the NOAA/OAR/ESRL PSD, Boulder, CO, USA, from their website at http://www.esrl.noaa.gov/psd/. NCEP/NCAR Reanalysis data provided by Physical Sciences Division: Data Management, NOAA/ESRL/PSD, Boulder, CO, USA, from their website at https://www.esrl.noaa.gov/psd/data/reanalysis/reanalysis.shtml. Precipitation data obtained from Met Éireann. The authors would like to acknowledge the comments provided by the Editor Radan Huth and the two anonymous reviewers which have greatly improved the manuscript.
Keywords:	Ireland; modified Lamb weather types; rainfall; storm tracks; synoptic origins;
Academic Unit:	Faculty of Social Sciences > Geography Faculty of Social Sciences > Research Institutes > Irish Climate Analysis and Research Units, ICARUS
Item ID:	18740
Identification Number:	https://doi.org/10.1002/joc.5495
Depositing User:	Rowan Fealy
Date Deposited:	23 Aug 2024 08:34
Journal or Publication Title:	International Journal of Climatology
Publisher:	Wiley Online
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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