Volume 14,Issue 4,1988 Table of Contents

ISSN 1000-0526
CN 11-2282/P

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Volume 14,Issue 4,1988 Table of Contents

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1 The El Nino event in 1986—1987 and its impact on summer lain belt and temperature in China

张先恭 , 赵汉光

1988, 14(4):3-7. DOI: 10.7519/j.issn.1000-0526.1988.4.001

[Abstract](720) [HTML](0) [PDF 481.79 K](979)

Abstract:
Based on the atmospheric and oceanic data from CAC of NOAA (U. S.) and BMC . (Beijing Meteorological Center), the features of formation process of 1986-1987 El-Nino event and the response of atmospheric circulation to the current ENSO episode are examined and compared with 1982-1983 counterpart. The influence of El-Nino event on summer rain belt and temperature anomaly in China is studied and some predictive indicators for summer rain belt in El-Nino year have been found.

2 An objective analogue method for medium-range weather forecast

钟元 , 李秀莉 , 姚嘉玲 , 朱美娜

1988, 14(4):8-11. DOI: 10.7519/j.issn.1000-0526.1988.4.002

[Abstract](663) [HTML](0) [PDF 340.73 K](915)

Abstract:
An objective analogue method for medium- ange (a period of ten days) weather forecast is developed. Using the lated Information and medium-range numerical prediction products and objective analogue criterion, an analogue process by which the weather forecast in a period of 10 days will be made in 500hPa synoptic evolution from past data is found by microcomputer. The forecasting results indicated thatthis method is efficacious.

3 A comparison between the correlation ratio and the linear correlation coefficient

朱光宇 , 胡成群 , 留小强

1988, 14(4):12-16. DOI: 10.7519/j.issn.1000-0526.1988.04.003

[Abstract](641) [HTML](0) [PDF 421.51 K](960)

Abstract:
In this paper, a comparison between the correlation ratio and the linear correlation coefficient are given,and their characteristics in evaluating correlation are con-sidered by computing them with practical data. The analysis shows that correlationratio has advantage over linear correlation coefficient and other correlation measure.

4 A cross spectral analysis of accumulated temperature in the growth period and corn yield in Northeast China

曹永华

1988, 14(4):17-20. DOI: 10.7519/j.issn.1000-0526.1988.04.004

[Abstract](641) [HTML](0) [PDF 346.28 K](909)

Abstract:
Based on a cross spectral analysis, the relationship between the periodic fluctuation of the accumulated temperature (∑T) during May to Sept. and corn yield (Y) is obtained, and the distribution features of the power spectra are discussed. The results show that there is a 3.3-year period of ET fluctuation in Liaoning and Jiling Provinces, and a 2.5-year one in Heilongjiang Province, a 6.68-, 4.0- and 4.0-year one of Y fluctuation in Liaoning, Jilin and Heilongjiang Province respectively.

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