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- W1045109687 abstract "This paper provides an overview of key findings from the EPA funded HydroDetect projectwhich establishes an Irish Reference Network (IRN) of river flow gauges for monitoring anddetecting climate driven trends. The flow archive from 35 hydrometric stations has an averagerecord length of 40 years and draws from the strengths of the existing national hydrometricnetwork. Using criteria based on the quality of flow records and minimisation of artificialinfluences and land-use change, complimented by expert judgement, the IRN is a valuableresource facilitating more strategic monitoring of climate driven variability and change inhydrological indicators and enabling more confident attribution of detected trends. Here ananalysis of trends in mean and high flows for stations in the IRN is presented, with the spatialdistribution of trends across the network examined for the period 1976-2009. The followingkey findings emerge. While there is considerable evidence of change in the IRN, it is difficultat this point in time to attribute these to anthropogenic greenhouse gas induced climatechange. Indeed some of the trends identified – decreases in shorter records in winter meanflows and increases in summer flows – are not consistent with expected changes as simulatedby Global Climate Models. This should not be surprising given the large variability of riverflows relative to climate change signals at this point.Trends in Irish river flows are strongly correlated with the winter North Atlantic OscillationIndex (NAOI). The sensitivity and response of the NAO to greenhouse gas forcing will haveobvious implications for Irish hydrology; however the question remains open as to the impactthat greenhouse gas forcing has had on recent behaviour of the NAO and how it is likely torespond to future forcing. While it remains challenging to identify anthropogenic climatechange signals at the catchment scale due to large natural variability and therefore a lowsignal to noise ratio, there is high potential for identifying sentinel stations and indicatorswithin the IRN for early detection of climate change signals. These findings heighten theimportance of the IRN for monitoring and detecting climate change signals at the catchmentscale, for tracking the emergence of signals relative to natural variability and for providinginformation, free from confounding factors, for validating output from climate change impactassessments and developing adaptation policies." @default.
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- W1045109687 date "2013-01-01" @default.
- W1045109687 modified "2023-09-27" @default.
- W1045109687 title "HydroDetect: The Identification and Assessment of Climate Change Indicators for an Irish Reference Network of River Flow Stations - an Overview" @default.
- W1045109687 hasPublicationYear "2013" @default.
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