Synchronous changes in the East Asian-Australian summer monsoons around 7.2 ka

Abstract Composite analysis from NCEP–NCAR reanalysis datasets over the period 1948–2007 indicates that stronger East Asian winter monsoons (EAWM) and stronger Australian summer monsoons (ASM) generally coexist in boreal winters preceding the onset of El Niño, although the EAWM tend to be weak after 1990, probably because of the decadal shift of EAWM and the change in El Niño events from cold-tongue type to warm-pool type. The anomalous EAWM and ASM enhance surface westerlies over the western tropical Pacific Ocean (WTP). It is proposed that the enhanced surface westerlies over the WTP prior to El Niño onset are generally associated with the concurrent anomalous EAWM and ASM. A simple analytical atmospheric model is constructed to test the hypothesis that the emergence of enhanced surface westerlies over the WTP can be linked to concurrent EAWM and ASM anomalies. Model results indicate that, when anomalous northerlies from the EAWM converge with anomalous southerlies from the ASM, westerly anomalies over the WTP are enhanced. This result provides a possible explanation of the co-impact of the EAWM and the ASM on the onset of El Niño through enhancing the surface westerly over the WTP.

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Investigating dynamic mechanisms for synchronous variation of East Asian and Australian summer monsoons over the last millennium

Palaeogeography Palaeoclimatology Palaeoecology ◽

10.1016/j.palaeo.2017.05.018 ◽

2017 ◽

Vol 480 ◽

pp. 70-79 ◽

Cited By ~ 3

Author(s):

Jian Shi ◽

Qing Yan ◽

Huijun Wang ◽

Dabang Jiang ◽

Jinzhong Min ◽

...

Keyword(s):

East Asian ◽

Last Millennium ◽

Dynamic Mechanisms ◽

Australian Summer

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Maxims of Foreign Policy

Itinerario ◽

10.1017/s0165115300044508 ◽

2000 ◽

Vol 24 (2) ◽

pp. 62-79

Author(s):

W.J. Boot

Keyword(s):

Foreign Policy ◽

Sixteenth Century ◽

Foreign Relations ◽

East Asian ◽

Modern Period ◽

Cultural Sphere ◽

Japanese Identity

In the pre-modern period, Japanese identity was articulated in contrast with China. It was, however, articulated in reference to criteria that were commonly accepted in the whole East-Asian cultural sphere; criteria, therefore, that were Chinese in origin.One of the fields in which Japan's conception of a Japanese identity was enacted was that of foreign relations, i.e. of Japan's relations with China, the various kingdoms in Korea, and from the second half of the sixteenth century onwards, with the Portuguese, Spaniards, Dutchmen, and the Kingdom of the Ryūkū.

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