Homogenisation and analysis of an expanded monthly rainfall network for the Island of Ireland (1850-2010)

Long-term precipitation series are critical for understanding emerging changes to the hydrological cycle. To this end we construct a homogenised Island of Ireland Precipitation (IIP) network comprising 25 stations and a composite series covering the period 1850-2010, providing the secondlongest regi...

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Main Authors:	Simon Noone, Conor Murphy, J. Coll, Tom Matthews, Donal Mullan, Robert Wilby, Seamus Walsh
Format:	Default Article
Published:	2016
Subjects:	Atmospheric sciences not elsewhere classified Other earth sciences not elsewhere classified Homogenisation HOMER Precipitation Island of Ireland Metadata Trend Earth Sciences not elsewhere classified Atmospheric Sciences
Online Access:	https://hdl.handle.net/2134/19032
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id	rr-article-9485636
record_format	Figshare
spelling	rr-article-94856362016-01-01T00:00:00Z Homogenisation and analysis of an expanded monthly rainfall network for the Island of Ireland (1850-2010) Simon Noone (7190261) Conor Murphy (7190264) J. Coll (7192979) Tom Matthews (5363627) Donal Mullan (7190591) Robert Wilby (1255929) Seamus Walsh (7190600) Atmospheric sciences not elsewhere classified Other earth sciences not elsewhere classified Homogenisation HOMER Precipitation Island of Ireland Metadata Trend Earth Sciences not elsewhere classified Atmospheric Sciences Long-term precipitation series are critical for understanding emerging changes to the hydrological cycle. To this end we construct a homogenised Island of Ireland Precipitation (IIP) network comprising 25 stations and a composite series covering the period 1850-2010, providing the secondlongest regional precipitation archive in the British-Irish Isles. We expand the existing catalogue of long-term precipitation records for the island by recovering archived data for an additional eight stations. Following bridging and updating of stations HOMER homogenisation software is used to detect breaks using pairwise and joint detection. Twenty-five breakpoints are detected across 14 stations, and the majority (20) are corroborated by metadata. Assessment of variability and change in homogenised and extended precipitation records reveal positive (winter) and negative (summer) trends. Trends in records covering the typical period of digitisation (1941 onwards) are not always representative of longer records. Furthermore, trends in post-homogenisation series change magnitude and even direction at some stations. While cautionary flags are raised for some series, confidence in the derived network is high given attention paid to metadata, coherence of behaviour across the network and consistency of findings with other long-term climatic series such as England and Wales precipitation. As far as we are aware, this work represents the first application of HOMER to a longterm precipitation network and bodes well for use in other regions. It is expected that the homogenised IIP network will find wider utility in benchmarking and supporting climate services across the Island of Ireland, a sentinel location in the North Atlantic. 2016-01-01T00:00:00Z Text Journal contribution 2134/19032 https://figshare.com/articles/journal_contribution/Homogenisation_and_analysis_of_an_expanded_monthly_rainfall_network_for_the_Island_of_Ireland_1850-2010_/9485636 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Atmospheric sciences not elsewhere classified Other earth sciences not elsewhere classified Homogenisation HOMER Precipitation Island of Ireland Metadata Trend Earth Sciences not elsewhere classified Atmospheric Sciences
spellingShingle	Atmospheric sciences not elsewhere classified Other earth sciences not elsewhere classified Homogenisation HOMER Precipitation Island of Ireland Metadata Trend Earth Sciences not elsewhere classified Atmospheric Sciences Simon Noone Conor Murphy J. Coll Tom Matthews Donal Mullan Robert Wilby Seamus Walsh Homogenisation and analysis of an expanded monthly rainfall network for the Island of Ireland (1850-2010)
description	Long-term precipitation series are critical for understanding emerging changes to the hydrological cycle. To this end we construct a homogenised Island of Ireland Precipitation (IIP) network comprising 25 stations and a composite series covering the period 1850-2010, providing the secondlongest regional precipitation archive in the British-Irish Isles. We expand the existing catalogue of long-term precipitation records for the island by recovering archived data for an additional eight stations. Following bridging and updating of stations HOMER homogenisation software is used to detect breaks using pairwise and joint detection. Twenty-five breakpoints are detected across 14 stations, and the majority (20) are corroborated by metadata. Assessment of variability and change in homogenised and extended precipitation records reveal positive (winter) and negative (summer) trends. Trends in records covering the typical period of digitisation (1941 onwards) are not always representative of longer records. Furthermore, trends in post-homogenisation series change magnitude and even direction at some stations. While cautionary flags are raised for some series, confidence in the derived network is high given attention paid to metadata, coherence of behaviour across the network and consistency of findings with other long-term climatic series such as England and Wales precipitation. As far as we are aware, this work represents the first application of HOMER to a longterm precipitation network and bodes well for use in other regions. It is expected that the homogenised IIP network will find wider utility in benchmarking and supporting climate services across the Island of Ireland, a sentinel location in the North Atlantic.
format	Default Article
author	Simon Noone Conor Murphy J. Coll Tom Matthews Donal Mullan Robert Wilby Seamus Walsh
author_facet	Simon Noone Conor Murphy J. Coll Tom Matthews Donal Mullan Robert Wilby Seamus Walsh
author_sort	Simon Noone (7190261)
title	Homogenisation and analysis of an expanded monthly rainfall network for the Island of Ireland (1850-2010)
title_short	Homogenisation and analysis of an expanded monthly rainfall network for the Island of Ireland (1850-2010)
title_full	Homogenisation and analysis of an expanded monthly rainfall network for the Island of Ireland (1850-2010)
title_fullStr	Homogenisation and analysis of an expanded monthly rainfall network for the Island of Ireland (1850-2010)
title_full_unstemmed	Homogenisation and analysis of an expanded monthly rainfall network for the Island of Ireland (1850-2010)
title_sort	homogenisation and analysis of an expanded monthly rainfall network for the island of ireland (1850-2010)
publishDate	2016
url	https://hdl.handle.net/2134/19032
_version_	1797829427327926272

Homogenisation and analysis of an expanded monthly rainfall network for the Island of Ireland (1850-2010)

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