中国气候异常变化与ENSO准四年循环的联系分析
ANALYSIS OF THE RELATIONSHIP BETWEEN THE CHINA ANOMALOUS CLIMATE VARIATION AND ENSO CYCLE ON THE QUASI-FOUR-YEAR SCALE
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摘要: 从月资料分析入手,分析了中国大陆地区的降水和气温异常与ENSO的联系。首先用REOF方法对降水和气温的变化进行分区分析,并讨论其年际变化特点。然后对降水和海温场、气温和海温场分别进行CSVD分析,讨论了在ENSO准四年循环的不同位相上,气温和降水的异常变化情况。结果表明:(1)在El Niñ o期间,我国东部地区,尤其是东北、长江中下游的江南地区降水偏多,容易发生洪涝,华北地区、黄河流域尤其是中部降水偏少,可能发生干旱。其中长江中下游的南部降水与赤道中东太平洋海温在准四年变化上关系密切,当中东太平洋海温达到最高值后约3个月,长江中下游的南部降水出现最大正距平。(2)在El Niñ o期间,东北容易出现低温天气,而其它地区尤其是河套地区及西南南部易出现高温天气。其中东北地区气温变化与赤道中东太平洋海温在准四年变化上关系密切,当中东太平洋海温达到最高值后约2个月,东北气温的负距平出现最低。La Niñ a阶段,情况与前述相反。Abstract: The relationship between the ENSO and abnormal variation of precipitation and temperature in the China is investigated based on the monthly data. Firstly,interannual variability of precipitation and temperature in different subareas has been discussed by use of REOF. Then,the variation of precipitation and temperature in the different phase of ENSO cycle is investigated by CSVD,respectively. Results show that,during the period of El Niñ o,precipitation in the eastern China,especially in the northeastern China and Yangtze River valley,is much more than normal and is apt to flood. Precipitation in northern China and Huanghe River valley,especially in the middle reach of Huanghe River,is less than normal and is apt to drought. Precipitation in Yangtze River valley is closely related to the SSTA in central and eastern tropical Pacific on the QFO scale,and the precipitation variation lag behind SSTA about 3 months. For the variation of surface temperature,during the period of El Niñ o,northeastern China usually colder than normal,and in other regions,especially in the Hetao region and southwestern China,are warmer than normal. The temperature in northeast China is closely associated with SSTA in eastern Pacific on the QFO scale and the surface temperature variation in the northeast China lags behind that of SSTA about 2 months.
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Key words:
- China anomalous climate variation /
- ENSO cycle /
- quasi-four-year scale
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[1] 李麦村,吴仪芳,黄嘉佑.中国东部季风降水与赤道东太平洋海温的关系[J].大气科学,1987,11:365-371. [2] 史久恩,林学椿,周琴芳.厄尔尼诺现象和我国夏季(6-8月)降水气温的关系[J].气象,1983(4):2-5. [3] 陈隆勋,陈多,沈如桂,等.中国气温的年际振荡及其与海气振荡的关系[J].热带气象学报,1991,7:323-331. [4] 黄荣辉,李维京.夏季热带西太平洋上空的热源异常对东亚上空副热带高压的影响及其物理机制[J].大气科学,1988(特刊):107-116. [5] 邹力,倪允祺.ENSO对亚洲夏季风异常和我国夏季降水的影响[J].热带气象学报,1997,13:306-314. [6] 邹力,吴爱明,倪允琪.在准两年尺度上ENSO与亚洲季风相互作用的研究[J].热带气象学报,2002,18:19-28. [7] 朱乾根,徐建军.ENSO及其年代际异常对中国东部气候异常的观测分析[J].南京气象学院学报,1998,21:615-623. [8] ZHANG Ren-he,AKIMASA Sumi,MASAHIDE Kimoto.A diagnostic study of the impact of El Nino on the precipitation inChina[J].Advance in Atmos Sci,1999,16:299-241. [9] 金祖辉,陶诗言.ENSO循环与中国东部地区夏季和冬季降水关系的研究[J].大气科学,1999,23:663-672. [10] 黄荣辉,黄刚,任保华.东亚夏季风的研究进展及其需进一步研究的问题[J].大气科学,1999,23:129-141. [11] CHEN Long-xun,CHEN Duo,SHEN Ru-gui.Interannual oscillation of rainfall in China and its relation to air-sea system[J].Acta Meteorological Sinica,1990,5:598-612. [12] ZHU Yan-feng,CHEN Long-xun.Study on the Quasi-4-year oscillation of air/sea interaction[J].Acta Meteorologica Sinica,2000,14:293-306. [13] 江志红,丁裕国.近40年我国降水量年际变化的区域性特征[J].南京气象学院学报,1994,17(1):73-78. [14] KAWAMURA R.A rotated EOF analysis of global sea surface temperature variability with interdecadal scales[J].J Phys Oceanogr,1994,24:707-715. [15] 丁裕国,江志红.气象数据时间序列信号处理[M].北京:气象出版社,1998.160-167. [16] 缪锦海,肖天贵.复奇异值分解方法的构造及度量特征[J].成都气象学院学报,1996,38(3):97-106.
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