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| Titel |
Weekly cycles in rainfall |
| VerfasserIn |
M. Marani, S. Zanetti |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250025453
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| Zusammenfassung |
| No natural phenomenon is likely to produce a signature at the weekly time scale and
thus the presence of weekly cycles in rainfall regimes has recently attracted much attention as
a symptom of strong anthropogenic effects on local climate.
However, results in the literature lead to contrasting conclusions, largely because
it is not obvious whether observed departures from a homogenous frequency of occurrence
during the week should be considered as significant. Here, a simple statistical test for significance
of the departure from a homogenous occurrence in time of ordinary and extreme rainfall events is derived
and applied to several long rainfall time series, sampling different rainfall regimes
and different local conditions. The results show that indeed some of the time series
analyzed exhibit the signs of significant departures (at the 95.5% level) from
homogeneity, thus confirming that it is possible to objectively quantify the effects
of human activities on local climate and to identify when such influence has
become a major climate determinant. |
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