Origin of seasonal predictability for summer climate over the Northwestern Pacific.
In: Proceedings of the National Academy of Sciences of the United States of America, Jg. 110 (2013-05-07), Heft 19, S. 7574
Online
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Zugriff:
Summer climate in the Northwestern Pacific (NWP) displays large year-to-year variability, affecting densely populated Southeast and East Asia by impacting precipitation, temperature, and tropical cyclones. The Pacific-Japan (PJ) teleconnection pattern provides a crucial link of high predictability from the tropics to East Asia. Using coupled climate model experiments, we show that the PJ pattern is the atmospheric manifestation of an air-sea coupled mode spanning the Indo-NWP warm pool. The PJ pattern forces the Indian Ocean (IO) via a westward propagating atmospheric Rossby wave. In response, IO sea surface temperature feeds back and reinforces the PJ pattern via a tropospheric Kelvin wave. Ocean coupling increases both the amplitude and temporal persistence of the PJ pattern. Cross-correlation of ocean-atmospheric anomalies confirms the coupled nature of this PJIO mode. The ocean-atmosphere feedback explains why the last echoes of El Niño-Southern Oscillation are found in the IO-NWP in the form of the PJIO mode. We demonstrate that the PJIO mode is indeed highly predictable; a characteristic that can enable benefits to society.
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Origin of seasonal predictability for summer climate over the Northwestern Pacific.
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Autor/in / Beteiligte Person: | Kosaka, Y ; Xie, SP ; Lau, NC ; Vecchi, GA |
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Zeitschrift: | Proceedings of the National Academy of Sciences of the United States of America, Jg. 110 (2013-05-07), Heft 19, S. 7574 |
Veröffentlichung: | Washington, DC : National Academy of Sciences, 2013 |
Medientyp: | academicJournal |
ISSN: | 1091-6490 (electronic) |
DOI: | 10.1073/pnas.1215582110 |
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