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| Titel |
A spatio-temporal analysis of US station temperature trends over the last century |
| VerfasserIn |
Vincenzo Capparelli, Christian Franzke, Antonio Vecchio, Mervyn P. Freeman, Nicholas W. Watkins, Vincenzo Carbone |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250078557
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| Zusammenfassung |
| This study presents a nonlinear spatio-temporal analysis of 1167 station
temperature records from the United States Historical Climatology Network
covering the period from 1898 through 2008. We use the Empirical Mode
Decomposition (EMD) method to extract the generally nonlinear trends of each
station. The statistical significance of each trend is assessed against three
null models of the background climate variability, represented by stochastic
processes of increasing temporal correlation length. We find strong evidence that more
than 50 percent of all stations experienced a significant trend over the last
century with respect to all three null models. A spatio-temporal
analysis reveals a significant cooling trend in the South-East
and significant warming trends in the rest of the contiguous US.
It also shows that the warming trend appears to have migrated
equatorward and possibly also in altitude. This shows the complex
spatio-temporal evolution of climate change at local scales |
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