This work describes the trends investigated for SO2-S(micrograms/m3,SO4-S (micrograms/m3)),and NO2-N (micrograms/m3) based on air samples collected on a daily basis at Valentia Observatory, Cahirciveen, Co. Kerry and analysed in the Met Éireann laboratory since 1981. Their trends have been observed using annual average values. The linear regression based trend line shows a significant reduction in SO2-S levels, approximately a decrease of 60% during the measurement period. Also a study has been performed to investigate if any correlation exists between the pollutant concentrations and wind direction.Wind data is gathered at Valentia Observatory on an hourly basis. This wind data was assigned wind direction as follows; N (340o - 20o), NE (30o - 60o), E (70o - 110o), SE (120o - 150o), S (160o - 200o), SW ( 210o - 240o), W (250o - 290o) and NW (300o - 330o). Wind sector analysis of the data showed that the highest concentrations for SO2-S were correlated with winds coming from the east, north east and south easterly directions.

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Bashir, W. Paull, B.   "Trends in Irish background air quality between 1981 - 2004 using Met Eireann data". Associated datasets and digitial information objects connected to this resource are available at: Secure Archive For Environmental Research Data (SAFER) managed by Environmental Protection Agency Ireland https://eparesearch.epa.ie/safer/resource?id=90041a5c-2f4c-102a-b1da-b128b41032cc (Last Accessed: 2025-01-20)

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SAFER-Data Display URL	https://eparesearch.epa.ie/safer/iso19115/display?isoID=11
Resource Keywords	Sulphur dioxide
EPA/ERTDI/STRIVE Project Code	ERC Fellowship Proje
EPA/ERTDI/STRIVE Project Theme	Climate Change
Resource Availability:	Public-Open
Limitations on the use of this Resource	You should contact the originators and owners of the dataset if you wish to use this data.
Number of Attached Files (Publicly and Openly Available for Download):	4
Project Start Date	Wednesday 14th January 2004 (14-01-2004)
Earliest Recorded Date within any attached datasets or digital objects	Thursday 1st January 1981 (01-01-1981)
Most Recent Recorded Date within any attached datasets or digital objects	Saturday 31st December 2005 (31-12-2005)
Published on SAFER	Thursday 29th March 2007 (29-03-2007)
Date of Last Edit	Thursday 29th March 2007 at 15:02:42 (29-03-2007)
Datasets or Files Updated On	Thursday 29th March 2007 at 15:02:42 (29-03-2007)

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Description of Geographical Characteristics of This Project or Dataset
Valentia Observatory is part of Met Éireann, the Irish Meteorological Service. It is located one kilometre west of the town of Cahirciveen, on the estuary of the Feartha river. The Observatory carries out surface weather and upper-air meteorological measurements, as well as a wide range of other scientific activities including ozone monitoring, geomagnetics, seismology, solar radiation and environmental monitoring. The Observatory is called Valentia because it was originally located on Valentia Island. 51° 56' 23"N 10° 14'40"W 11M above mean sea level

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The following is a list of projects, datasets, and resources on SAFER-Data from which users downloaded attachments from soon after downloading attachments from this resource Trends in Irish background air quality between 1981 - 2004 using Met Eireann data. You can view the full description for projects, datasets, and resources by using the links supplied.

• EPA Ireland Archive of Nitrogen Oxides Monitoring Data View Full Metadata Description
• New Transboundary Air Pollution Monitoring Capacity for Ireland View Full Metadata Description
• EPA Ireland Archive of PM10 Monitoring Data View Full Metadata Description
• AQUIRE: Air Quality Forecast and Statistics over Ireland View Full Metadata Description
• Towards a National Soil Database View Full Metadata Description

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