Two decades ago in Hydrological Processes, one of us (Burt et al., 1988) reported stream nitrate levels in a small catchment of mixed land use (the Slapton Wood catchment) over a period of 15 years (1970)(1971)(1972)(1973)(1974)(1975)(1976)(1977)(1978)(1979)(1980)(1981)(1982)(1983)(1984)(1985). Mult
Cyclical long-range dependence and the warming effect in a long temperature time series
β Scribed by L. A. Gil-Alana
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 133 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0899-8418
- DOI
- 10.1002/joc.1650
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β¦ Synopsis
Abstract
In this paper, we propose a new approach for modelling a long temperature time series, using fractional cyclical integration. This model is based on the observation that the estimated spectrum of the series (the average annual temperature in Central England, 1659β2001) has its highest value at a frequency which is not zero, thus suggesting the existence of cycles at other frequencies. The results based on a fractional cyclical model show that there is a significant warming effect throughout the sample of about 0.22 Β°C/century. However, if we concentrate exclusively on the data corresponding to the 20th century that value increases to 0.64%. Moreover, the results in the paper show that a fractionally cyclically integrated model can be a competing alternative to other approaches based on fractional integration at the zero frequency. Copyright Β© 2007 Royal Meteorological Society
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