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湖泊科学  2003 

大气季节内振荡的活动与江淮流域夏季旱涝

DOI: 10.18307/2003.sup02

Keywords: 江淮流域夏季旱涝,低频特征,大气季节内振荡,环流形势

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Abstract:

观测资料的分析极为清楚地表明,江淮流域的夏季降水有着极为明显的低频变化,周期为30-60d和近20d的振荡是其最基本的特征,尤其是在多雨的年份.对应江淮夏季多雨(涝)年和少雨(旱)年,大气环流的分析表明其大气季节内振荡(IS0)的形势有着显著的差异.例如在多雨(少雨)年,在长江以南的850hPa上为一个低频(IS0)反气旋(气旋)性环流控制,而中国北部和日本一带为气旋(反气旋)性环流,从而在江淮流域形成较强的低频辐合(辐散)气流;在200hPa的青藏高原上却为一个低频气旋(反气旋)性环流所控制.分析还表明,对应多雨年,在江淮流域有明显的由中高讳度向南传播和由低玮度向北传播的大气低频振荡的汇合情况;而对应于少雨年,由中高纬度向南传播的低频系统较不明显,在江淮流域低频系统的汇合也较为不清楚.

References

[1]  1 Madden R D, P Julian. Detection of a 40-50 day oscillation in the zonal wind in the tropical pacific. J Atmos Sci, 1971, 28:702-708
[2]  2 Murakami T, T Nakazawa, J He. On the 40-50 day oscillations during the 1979 Northern Hemisphere summer, part 1:Phase propagation. J Meteor Soc Japan, 1984, 62:440-468
[3]  4 李崇银.大气低频振荡.北京:气象出版社,1991. 276
[4]  6 Lau K M. Seasonal and interannual climatology of summer monsoon rainfallover East Asia. Mow Wea Rev, 1988, 116:18-37
[5]  9 李桂龙,李崇银.江淮流域夏季旱涝与不同时间尺度大气扰动的关系.大气科学,1999, 23:39-50
[6]  10 陶诗言,张庆云,张顺利.1998年长江流域洪涝灾害的气候背景和大尺度环流条件.气候与环境研究,1998, 3:290-299
[7]  11 Li Chongyin,Li Guilong. Evolution of intraseasonal oscillation over the fropical western Pacific/South China Sea mid its effect to the summer precipitation in Southem China. Advances Atmos Sci, 1997,14:246-254
[8]  3 Knutson T R, K M Weickmann. 30-60 day atmospheric oscillation:Composite life cycles of convection and circulation anomalies. Mon Wea Rev. 1987, 115:1407-1436
[9]  5 陈兴跃,王会军,曾庆存.大气季节内振荡及其年际变化.北京:气象出版社,2000. 176
[10]  7 李崇银.华北地区汛期降水的一个分析研究.气象学报,1992, 50:41-49
[11]  8 Lu E, Y H Ding. Low frequency oscillation in East Asia during the 1991 excessively heavy rain Changjiang-Huaihe River basin. Acta Meteorologica Sinica, 1996, 54:730-736
[12]  12 Li Chongyin, Long Zhenxia, Zhang Qingyun. Strong/wedc summer monsoon activity over the Soutii China Sea and atoiospheric inti-aseasonal oscillation. Advances Atmos Sci, 2001,18:1146-1160
[13]  13 Murakami T. Large-scale aspects of deep convective activity over the GATE area. Mon Wea Rev, 1979,107:994-1013
[14]  14 Sun A J, G L Tang. Low frequency oscillation characteristics of summer of 1983 and 1985.Chinese Journal of Atmospheric Sciences, 1994,18:576-585

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