globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00382-017-3949-6
Scopus记录号: 2-s2.0-85031944049
论文题名:
Modulation of the MJO intensity over the equatorial western Pacific by two types of El Niño
作者: Wang L.; Li T.; Chen L.; Behera S.K.; Nasuno T.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 51, 期:2018-01-02
起始页码: 687
结束页码: 700
语种: 英语
英文关键词: El Niño ; Madden–Julian oscillation ; Moist static energy ; Western Pacific
Scopus关键词: advection ; eddy ; El Nino ; equatorial dynamics ; Madden-Julian oscillation ; meridional circulation ; moisture content ; perturbation ; Pacific Ocean ; Pacific Ocean (Central) ; Pacific Ocean (East) ; Pacific Ocean (West)
英文摘要: The modulation of the Madden–Julian Oscillation (MJO) intensity by eastern Pacific (EP) type and central Pacific (CP) type of El Niño was investigated using observed data during the period of 1979–2013. MJO intensity is weakened (strengthened) over the equatorial western Pacific from November to April during EP (CP) El Niño. The difference arises from distinctive tendencies of column-integrated moist static energy (MSE) anomaly in the region. A larger positive MSE tendency was found during the convection developing period in the CP MJO than the EP MJO. The tendency difference is mainly caused by three meridional moisture advection processes: the advection of the background moisture by the intraseasonal wind anomaly, the advection of intraseasonal moisture anomaly by the mean wind and the nonlinear eddy advection. The advections’ differences are primarily caused by different intraseasonal perturbations and high-frequency activity whereas the background flow and moisture gradient are similar. The amplitudes in the intraseasonal suppressed convection anomaly over the central Pacific is critical in modulating the three meridional moisture advection processes. The influences on the central Pacific convection anomaly from seasonal mean moisture in two types of El Niños are discussed. © 2017, Springer-Verlag GmbH Germany.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109237
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Key Laboratory of Meteorological Disaster, Ministry of Education (KLME), Joint International Research Laboratory of Climate and Environmental Change (ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science and Technology, Nanjing, China; Department of Atmospheric Sciences, International Pacific Research Center, and School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu, HI, United States; Application Laboratory, JAMSTEC, Yokohama, Japan; Department of Seamless Environmental Prediction Research, JAMSTEC, Yokohama, Japan

Recommended Citation:
Wang L.,Li T.,Chen L.,et al. Modulation of the MJO intensity over the equatorial western Pacific by two types of El Niño[J]. Climate Dynamics,2018-01-01,51(2018-01-02)
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