秋旱

2004年广西秋旱的气候特征

Climatic Characteristic of Autumn Drought In Guangxi 2004

桂林秋旱成因及其短期气候预测的研究

Study on the Causes for Autumn Drought in Guilin and Its Forecast on a Short-term Basis

通过分析850hPa等压面上的垂直速度场发现秋旱同期长江以南地区下沉气流异常，这种天气形势不利于降水的产生。

The analysis of vertical velocity at 850 hPa indicates the anomaly of the sinking flow during the drought which is not in favor of rain . The subtropical anticyclone controlling the area to south of the Yangtze River in autumn 2004 influences the development of drought .

秋旱的集成预报方法探讨

A Study on the Consensus Forecast Method for Autumn Drought

夏秋多旱，秋旱尤甚；

The drought is more in summer and autumn , but the autumn is more graveness ;

春旱日数变化以减少趋势为主，夏旱、秋旱日数变化以增加趋势为主；

Drought days showed a decline trend in spring , and an increase trend in summer and autumn .

秋旱北部略多于南部，以全市性大旱为主；

In autumn , the city was stricken by serious drought on whole with the north heavier than the south .

采取立体栽培方式改善林间小气候，减轻伏旱、秋旱危害。

Take three-dimensional cultivation to improve climate among the forest , reduce the hazard of the late summer and autumn drought .

2003年江西伏旱指数居历史第3位，伏秋旱指数居历史第5位；

In 2003 , the drought index takes the third position , summer and autumn drought index takes the fifth position in history .

全省伏旱、秋旱、伏秋连旱的频率分别为10%、16.7%和13.3%。

The occurrence frequency in Jiangxi province was 10 percent for summer drought , 16.7 percent for autumn drought , and 13.3 for both .

2004年中国长江以南地区严重秋旱特征及其同期大气环流异常

The Features of the Heavy Drought Occurring to the South of the Yangtze River in China as well as the Anomalies of Atmospheric Circulation in Autumn 2004

其结果表明：在无灌溉条件下种植扁穗雀麦，播期是成败的关键，秋旱后播种最好；

The results showed that the sowing data was the key factor to the sward establishment without irrgation in the upland . it was best to sow immediately after the drought in autumn .

第二，冬旱、春旱、秋旱、秋冬连旱、冬春连旱增多，伏旱次数明显减少，盛夏洪涝频次减少；

Secondly , the increase of dry winter , spring , autumn , continuously dry autumn and winter , continuous dry winter and spring , the visible decrease of dry hot summer days and flood midsummer ;

信阳市发生的干旱主要有伏旱、秋旱和冬旱3种类型，且夏季发生干旱的频率远高于其它季节。

Droughts occurred in Xinyang City mainly fall into three categories : the midsummer drought , the autumn drought and the winter drought . And the frequency of midsummer drought is much higher than that of the other two .

除此之外，中高纬地区脊区前方和槽区的后方易于冷空气的南下输送，这在很大程度上也促使了秋旱的发展。

And in the middle and high latitude area , the positions of the trough and the ridge is favorable for the southward motion of the cold air , which will be propitious to the development of the drought .

指出了这一地区虽然年降雨量较多，但由于其分配极不均匀，伏旱秋旱非常严重，成为影响该地区农业生产的主要障碍因子之一。

Results show that in this area the drought in summer and autumn is severe due to unequal distribution of rainfall during a year though there is rich precipitation annually , becoming one of the primary barriers affecting agricultural production .

针对甘肃2002年伏秋连旱的持续时间、范围和强度进行了对比分析，干旱持续时间之长、范围之大为近50a所少见。

A study was carried out about the duration time , scope , and intension of the 2002 summer and autumn continuous drought in Gansu , which long duration time and heavy intension scarcely appeared in recent 50 years .

2003年我国极端天气气候事件及气象灾害发生较为频繁，特别是淮河流域特大洪水、南方持续的高温热浪及伏秋连旱，造成了严重影响。

More frequent weather and climate extreme events , associated with the meteorological disasters were observed in China in 2003 . Particularly , the big floods in the Huai River , durative heat wave and lasting severe drought in the summer and fall in south China resulted in great impacts .

结果表明鄱阳湖在这三年中，均发生了伏、秋、冬旱连春旱，但是秋旱最严重。

The results show that in the three years , Poyang Lake has drought in summer , autumn , winter and even in spring .