Interdecadal Variability of East Asian Summer Monsoon  Precipitation over 220 Years (1777--1997)

Chun-Ji KIM; QIAN Weihong; Hyun-Suk KANG; Dong-Kyou LEE

doi:10.1007/s00376-009-8079-6

Impact Factor: 5.8

Volume 27 Issue 2

Mar. 2010

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 2010 > 27(2): 253-264

Interdecadal Variability of East Asian Summer Monsoon Precipitation over 220 Years (1777--1997)

1.
Atmospheric Sciences Program, School of Earth and Environmental Sciences, Seoul National University, Seoul 151--747, Korea,Department of Geophysics, Peking University, Beijing 100871,Atmospheric Sciences Program, School of Earth and Environmental Sciences, Seoul National University, Seoul 151--747, Korea,Atmospheric Sciences Program, School of Earth and Environmental Sciences, Seoul National University, Seoul 151--747, Korea

doi: 10.1007/s00376-009-8079-6

Abstract
References
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Abstract:
In this study, long-term (1777--1997) precipitation data for Seoul, Korea, wetness indices from eastern China, and modern observations are used to identify the interdecadal variability in East Asian summer monsoon precipitation over the last 220 years. In the East Asian monsoon region, two long-term timescales of dry--wet transitions for the interdecadal variability and quasi-40- and quasi-60-year timescales are dominant in the 220-year precipitation data of Seoul, as well as in the wetness indices over China. The wet and dry spells between Seoul (southern China) and northern China are out-of-phase (out-of-phase) at the quasi-60-year timescale, and in-phase (out-of-phase by approximately 90o before 1900 and in-phase after 1900) at the quasi-40-year timescale. In particular, during the last century, the dominant long-term timescales over East Asia tend to decrease from the quasi-60-year to the quasi-40-year with increasing time. The dominant quasi-40-year and quasi-60-year timescales of the Seoul precipitation in Korea are strongly correlated with these timescales of the northern Pacific Ocean.
- interdecadal variability,
- East Asian summer monsoon precipitation,
- timescales,
- dry--wet transition
References

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Manuscript History

Manuscript received: 10 March 2010

Manuscript revised: 10 March 2010

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Interdecadal Variability of East Asian Summer Monsoon Precipitation over 220 Years (1777--1997)

1. Atmospheric Sciences Program, School of Earth and Environmental Sciences, Seoul National University, Seoul 151--747, Korea,Department of Geophysics, Peking University, Beijing 100871,Atmospheric Sciences Program, School of Earth and Environmental Sciences, Seoul National University, Seoul 151--747, Korea,Atmospheric Sciences Program, School of Earth and Environmental Sciences, Seoul National University, Seoul 151--747, Korea

Manuscript received: 2010-03-10
Manuscript revised: 2010-03-10

Abstract: In this study, long-term (1777--1997) precipitation data for Seoul, Korea, wetness indices from eastern China, and modern observations are used to identify the interdecadal variability in East Asian summer monsoon precipitation over the last 220 years. In the East Asian monsoon region, two long-term timescales of dry--wet transitions for the interdecadal variability and quasi-40- and quasi-60-year timescales are dominant in the 220-year precipitation data of Seoul, as well as in the wetness indices over China. The wet and dry spells between Seoul (southern China) and northern China are out-of-phase (out-of-phase) at the quasi-60-year timescale, and in-phase (out-of-phase by approximately 90o before 1900 and in-phase after 1900) at the quasi-40-year timescale. In particular, during the last century, the dominant long-term timescales over East Asia tend to decrease from the quasi-60-year to the quasi-40-year with increasing time. The dominant quasi-40-year and quasi-60-year timescales of the Seoul precipitation in Korea are strongly correlated with these timescales of the northern Pacific Ocean.

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