Variability of Summer Atmospheric Moisture Flux and Its Effect on Precipitation over East China

Using the in-situ precipitation and NCEP/NCAR daily reanalysis data, we found by studies of change of moisture flux and its effect that the northward water vapor transport represented by moisture flux in East China tends to retreat southward, and the eastward water vapor transport tends to weaken with weakening of the intensity of moisture flux. The north boundary of meridional moisture flux (50 kg m-1s-1) retreats 2.8 degrees in latitude per decade during 1968-2003. The weakening of water vapor transport implies the weakening and southward retreat of East Asian monsoon, which leads to the tendency of decrease in moisture flux convergence over North China and the middle and lower reaches of the Yellow River, and the tendency of decrease in precipitation over those regions, but on the contrary the enhanced water vapor transport convergence over the middle and lower reaches of the Yangtze River implies the tendency of increase in precipitation to some extent. Indeed the long-term variability of precipitation in East China has a close relation with that of atmospheric moisture flux.

作 者： JIANG Ying ZHAI ranmao WANG Qiyi   作者單位： Laboratory for Climate Studies of China Meteorological Administration, National Climate Center, Beijing 100081  刊 名： 氣象學報（英文版）  SCI 英文刊名： ACTA METEOROLOGICA SINICA  年，卷(期)： 2005 19(4)  分類號： P4  關鍵詞： moisture flux (water vapor flux)   precipitation   change   tendency  

【Variability of Summer Atmospheric Mo】相關文章：

VARIABILITY SETS AND HAMILTON SEQUENCES04-29

Effects of Mo on the Microstructure and Hydrogen Sorption Properties of Ti-Mo Getters04-29

Atmospheric Free Modes and Subtropical High04-28

An estimate on the rainout of atmospheric CO204-26

Hierarchical similarity in the atmospheric boundary layer turbulence04-28

EFFECTS OF THE ATMOSPHERIC COLD SOURCE OVER THE TIBETAN PLATEAU ON THE QUASI 4-YEAR OSCILLATION OF OCEAN-ATMOSPHERIC-LAN04-27

A tool model for predicting atmospheric kinetics with sensitivity analysis04-28

實習總結2010 summer04-27

Optimizing the atmospheric sampling sites using fuzzy mathematic methods04-30

Effect of atmospheric precipitation on the dissolved loads of the Dongjiang River,China04-26