We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK


97% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Distributional change of monthly precipitation ...
View graph of relations

« Back

Distributional change of monthly precipitation due to climate change: comprehensive examination of dataset in southeastern United States

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>30/09/2014
<mark>Journal</mark>Hydrological Processes
Number of pages8
Early online date2/09/13
<mark>Original language</mark>English


A number of watersheds are selected from the Hydro-Climate Data Network over southeastern United States to examine possible changes in hydrological time series, e.g. precipitation, introduced by changing climate. Possible changes in monthly precipitation are examined by three different methods to detect second order stationarity, abrupt changes in the variance and smooth changes in quantiles of the time series. An analysis of second order stationarity shows that precipitation in eight of the 56 watersheds display nonstationary behaviour. Change-point analyses reveal that changes in the long-term variance of monthly precipitation are only detected for a few sites. As a complementary analysis tool, quantile regression aims to detect potential changes of different percentiles of the monthly precipitation over time. Several sites show diverging trends in the quantiles, which implies that the range and thus variance of the data, is increasing. As distinct change-points are not identified, this suggests that the effect is small and cumulative. Results are analysed in detail, and possible explanations are provided. This type of thorough analysis provides a basis for understanding the possible redistribution of water cycle. It also provides implications for water resources management and hydrological engineering facility design and planning.