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Titel |
Changes in the in-phase relationship between the Indian and subsequent Australian summer monsoons during the past five decades |
VerfasserIn |
J.-Y. Yu, M. A. Janiga |
Medientyp |
Artikel
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Sprache |
Englisch
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ISSN |
0992-7689
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Digitales Dokument |
URL |
Erschienen |
In: Annales Geophysicae ; 25, no. 9 ; Nr. 25, no. 9 (2007-10-02), S.1929-1933 |
Datensatznummer |
250015907
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Publikation (Nr.) |
copernicus.org/angeo-25-1929-2007.pdf |
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Zusammenfassung |
This study examines the decadal changes in the in-phase relationship between
Indian summer monsoon and the subsequent Australian summer monsoon using
observational data from 1950–2005. The in-phase relationship is the tendency
for a strong Indian summer monsoon to be followed by a strong Australian
summer monsoon and vice versa. It is found that the in-phase relationship
was weak during the late 1950s and early 1960s, strengthened to a maximum in
the early 1970s just before the 1976/77 Pacific climate shift, then declined
until the late 1990s. Pacific SST anomalies are noticed to have strong
persistence from boreal to austral summer, providing the memory to connect
the Indian and subsequent Australian summer monsoon. The simultaneous
correlation between the Pacific SST anomalies and the Indian summer monsoon
is always strong. It is the weakening and strengthening of the simultaneous
correlation between the Australian summer monsoon and the Pacific SST
anomalies that contributes to the decadal variations of the in-phase monsoon
relation. This study suggests that the interaction between the Australian
monsoon and the Pacific Ocean is crucial to tropical climate variability and
has experienced significant changes over the past five decades. |
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