CLIMATOLOGICAL CHARACTERISTICS OF MOISTURE TRANSPORT OVER YANGTZE RIVER BASIN

Xie An; Mao Jiangyu; Song Y any un; Ye Qian

Vol.13, NO.1, 2002

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Xie An, Mao Jiangyu, Song Yanyun, Ye Qian. Climatological characteristics of moisture transport over Yangtze River Basin. J Appl Meteor Sci, 2002, 13(1): 67-77.

Citation:

Xie An, Mao Jiangyu, Song Yanyun, Ye Qian. Climatological characteristics of moisture transport over Yangtze River Basin. J Appl Meteor Sci, 2002, 13(1): 67-77.

Xie An, Mao Jiangyu, Song Yanyun, Ye Qian. Climatological characteristics of moisture transport over Yangtze River Basin. J Appl Meteor Sci, 2002, 13(1): 67-77.

Citation:

Xie An, Mao Jiangyu, Song Yanyun, Ye Qian. Climatological characteristics of moisture transport over Yangtze River Basin. J Appl Meteor Sci, 2002, 13(1): 67-77.

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CLIMATOLOGICAL CHARACTERISTICS OF MOISTURE TRANSPORT OVER YANGTZE RIVER BASIN

1.
Department of Geophysics, Pek ing University, Beijing 100871
2.
Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029

Received Date: 2000-08-18
Rev Recd Date: 2000-11-02
Publish Date: 2002-02-28

Abstract

Abstract

Climatological characteristics of moisture transport over the Yangtze River basin during summer monsoon are investigated based on NCEP/NCAR reanalysis data for the period of 1973—1998. The differences between drought and flood years, and especially some features of moisture transport over the Yangtze River basin in the course of flood in 1998 are examined. The results show that the characteristics of horizontal moisture transport over the Yangtze River are different from month to month. Moisture transport from the Bay of Bengal and South China is main sources of the Yangtze River basin precipitation. Droughts or floods over the Yangtze River are closely related with the onset time of summer monsoon over the South China Sea. Yangtze River basin floods chiefly resulted from the long-term maintenance of moisture transport from the South China Sea and the Bay of Bengal to the Yangtze River basin in 1998.
- Yangtze basin;
- Moisture transport;
- South China Sea monsoon

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References(7)

Figures and Tables

图 1 6~8 月850 hPa 月平均水汽水平输送图(单位:g·hPa -1·cm^-1·s^-1)

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图 2 长江中下游地区4~8 月逐候水汽收支

(正值为输入水汽，负值为输出水汽，单位:10⁴ kg·hPa^-1·s^-1)

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图 3 长江中下游地区850 hPa 多年候平均

(a)经向水汽输送(b)涝年与旱年经向水汽输送之差的时间-纬度图(单位:g·hPa^-1·cm^-1·s^-1)

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图 4 850 hPa 长江中下游地区

(a)纬向水汽输送(b)经向水汽输送小波变换的时间-频率图(实线:正值，虚线:负值)

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图 5 旱、涝年850 hPa 6~7 月月平均水汽输送差值图

(涝年减去旱年，单位:g·hPa^-1·cm^-1·s^-1)

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图 6 长江中下游旱涝的水汽输送特征与南海季风爆发早晚示意图

(双虚线表示气候平均最大水汽轴，实、虚箭头分别为长江中下游涝、旱年和南海季风爆发早、晚年的水汽输送之差)

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图 7 1998 年7 月上旬和8 月上旬水汽输送旬距平图

(单位:g·hPa^-1·cm^-1·s^-1)

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References

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