摘要
本文利用全国125个探空台站1980年(涝年)和1985年(旱年)的一日二次的探空资料计算了江淮流域大气中的水汽通量。通过对其年变化规律的分析,揭示了旱、涝年份水汽输送的特点。结果表明:大气中的水汽输送对于旱涝形成有着重大影响,旱、涝年份的水汽输送场存在明显的差别。夏涝年,水汽输送最大中心及雨带均停留在江淮一带。而夏早年,水汽输送最大中心及雨带则明显偏北。并且发现,在水汽输送场上的可降水量最大中心、水汽辐合带及水汽辐合量最大中心也与雨带有很好的一致性。
Utilizing radiosonde data of 125 stations observed two times a day over China, we calculated the transport of the water vapour for the whote atmospheric layer in 1980/ 1985, the year of typical summer flood/drought over the Yangtze-Huaihe river basins. Threugh analysing the annual variation regularity of the water vapour transport, the water vapour characteristics of summer flocd/drought over the Yangtzer-Huaihe river basins has revealed. The results show that the center of water vapour transport and rain belt lie over the Yangtze-Huaihe river basins during the summer flood period. On the other hand, when summer drought happens, the cenicr of water vapour transport and rain belt lie to the north of that in summer flood period. We also find that the center of precipitable water, the water vapour convergence belt are in consistence with the rain belt.
出处
《气象科学》
CSCD
北大核心
1993年第2期164-173,共10页
Journal of the Meteorological Sciences
