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| Titel |
Variability of summer precipitation over Eastern China during the last millennium |
| VerfasserIn |
C. Shen, W.-C. Wang, Y. Peng, Y. Xu, J. Zheng |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 5, no. 2 ; Nr. 5, no. 2 (2009-04-06), S.129-141 |
| Datensatznummer |
250002391
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| Publikation (Nr.) |
 copernicus.org/cp-5-129-2009.pdf |
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| Zusammenfassung |
| We use measurements of recent decades, 1500-yr proxy data, and millennium
model simulations with a variety of climate facings to study the temporal
and spatial variability of summer precipitation over eastern China. Spectral
analysis of the proxy data using multi-taper method reveals three
statistically significant bidecadal (15–35-yr), pendadecadal (40–60-yr), and
centennial (65–170-yr) oscillation bands. The results of wavelet filtering
show that the amplitudes of these bands vary substantially through time
depending on the temperature regimes. Weak centennial oscillation and strong
pentadecadal oscillation occur in warm conditions, whereas both the
centennial and pentadecadal oscillations are strong in cold conditions. A
model/data intercomparison suggests that pentadecadal and bidecadal
oscillations could be associated with internal variability of the climate
system. It is also found that the increased frequency of
drought-in-north/flood-in-south spatial pattern over eastern China during
the last two decades is unusual in the past five centuries. |
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