Low-frequency variability of regional sea surface temperature and rainfall in the Austral-Indonesian region
Presentation
Paper/Presentation Title | Low-frequency variability of regional sea surface temperature and rainfall in the Austral-Indonesian region |
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Presentation Type | Presentation |
Authors | Faqih, Akhmad (Author), Ribbe, Joachim (Author) and Meinke, Holger (Author) |
Journal or Proceedings Title | Proceedings of the 9th International Conference on Southern Hemisphere Meteorology and Oceanography |
Year | 2009 |
Place of Publication | United States of America |
Web Address (URL) of Paper | http://www.bom.gov.au/events/9icshmo/ |
Conference/Event | 9th International Conference on Southern Hemisphere Meteorology and Oceanography |
Event Details | 9th International Conference on Southern Hemisphere Meteorology and Oceanography Event Date 09 to end of 13 Feb 2009 Event Location Melbourne, Australia |
Abstract | A study of low-frequency variability of regional sea surface temperature (SST) and rainfall in the Austral-Indonesian region on seasonal basis is conducted. This study covers an area of 90-160E and 25S-20N, which includes Indonesia and Northern Australia. The results show decadal to multidecadal variability from 9 to more than 50 year cycles, with consistently dominant 14 years cycle obtained from the spectral analysis of the principal SST loading. These might be linked to the Pacific Inter-Decadal Oscillation (PDO) and the Interdecadal Pacific Oscillation (IPO) phenomenon. The analysis demonstrates correlations of the EOF scores of 9 years filtered SST data and rainfall. The seasonal patterns of these correlations are similar to the rainfall climatology patterns during 1977-2002 periods and are opposite to the climatology of 1947-76 periods particularly for the Indonesian region. Considerable upward trends of the regional SST in different areas in the Austral-Indonesian region are also found, particularly after 1980s. It is possible that climate change might have a major role in contributing to these trends. The increase of mean SST anomalies on low-frequency timescales could lead to more active ocean-atmosphere processes. These might cause an increase of more extreme rainfall events on higher frequency time scales on specific regions. |
Keywords | Indonesia, climate, rainfall, IPCC, Pacific Decadal Oscillation |
ANZSRC Field of Research 2020 | 370202. Climatology |
Public Notes | No evidence of copyright restrictions on web site. Only abstracts published, as supplied here. |
Byline Affiliations | Department of Biological and Physical Sciences |
Wageningen University, Netherlands |
https://research.usq.edu.au/item/9z9wx/low-frequency-variability-of-regional-sea-surface-temperature-and-rainfall-in-the-austral-indonesian-region
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