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Detailed Reference Information |
Vinnikov, K.Y., Robock, A., Grody, N.C. and Basist, A. (2004). Analysis of diurnal and seasonal cycles and trends in climatic records with arbitrary observation times. Geophysical Research Letters 31: doi: 10.1029/2003GL019196. issn: 0094-8276. |
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Many long-term records of climate variables have missing data or have had changes in their times of observation. Here we present a technique to analyze such inhomogeneous records. We assume that the underlying climatic processes are nonstationary, where the observations contain a long-term trend superimposed on periodic shorter time seasonal and diurnal cycles. The seasonal and diurnal variations are approximated using a limited number of Fourier harmonics, while the trend is represented by a monotonic function of time whose amplitude can also vary seasonally and diurnally. A least squares method is used to estimate the unknown Fourier coefficients. As an example of the technique, we present an analysis of multi-decadal hourly observations of surface air temperature obtained from several meteorological stations within the United States. |
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Abstract |
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Keywords
Atmospheric Composition and Structure, Instruments and techniques, Global Change, Climate dynamics, Global Change, Instruments and techniques, Meteorology and Atmospheric Dynamics, Climatology, Meteorology and Atmospheric Dynamics, Instruments and techniques |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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